gnulib: update

Signed-off-by: Fabian Groffen <grobian@gentoo.org>

1 files changed, 5927 insertions, 2623 deletions

diff --git a/configure b/configure
index 19ec19c7..b118ff87 100755
--- a/configure
+++ b/configure
@@ -647,6 +647,7 @@ ac_includes_default="\
 ac_header_c_list=
 ac_func_c_list=
 gl_getopt_required=POSIX
+enable_year2038=no
 ac_subst_vars='gltests_LIBOBJDEPS
 gltests_LTLIBOBJS
 gltests_LIBOBJS
@@ -680,109 +681,10 @@ LIBGNU_LIBDEPS
 GL_CFLAG_GNULIB_WARNINGS
 GL_CFLAG_ALLOW_WARNINGS
 gltests_WITNESS
-GL_GNULIB_MDA_WCSDUP
-GL_GNULIB_WCSFTIME
-GL_GNULIB_WCSWIDTH
-GL_GNULIB_WCSTOK
-GL_GNULIB_WCSSTR
-GL_GNULIB_WCSPBRK
-GL_GNULIB_WCSSPN
-GL_GNULIB_WCSCSPN
-GL_GNULIB_WCSRCHR
-GL_GNULIB_WCSCHR
-GL_GNULIB_WCSDUP
-GL_GNULIB_WCSXFRM
-GL_GNULIB_WCSCOLL
-GL_GNULIB_WCSNCASECMP
-GL_GNULIB_WCSCASECMP
-GL_GNULIB_WCSNCMP
-GL_GNULIB_WCSCMP
-GL_GNULIB_WCSNCAT
-GL_GNULIB_WCSCAT
-GL_GNULIB_WCPNCPY
-GL_GNULIB_WCSNCPY
-GL_GNULIB_WCPCPY
-GL_GNULIB_WCSCPY
-GL_GNULIB_WCSNLEN
-GL_GNULIB_WCSLEN
-GL_GNULIB_WMEMSET
-GL_GNULIB_WMEMPCPY
-GL_GNULIB_WMEMMOVE
-GL_GNULIB_WMEMCPY
-GL_GNULIB_WMEMCMP
-GL_GNULIB_WMEMCHR
-GL_GNULIB_WCWIDTH
-GL_GNULIB_WCSNRTOMBS
-GL_GNULIB_WCSRTOMBS
-GL_GNULIB_WCRTOMB
-GL_GNULIB_MBSNRTOWCS
-GL_GNULIB_MBSRTOWCS
-GL_GNULIB_MBRLEN
-GL_GNULIB_MBRTOWC
-GL_GNULIB_MBSINIT
-GL_GNULIB_WCTOB
-GL_GNULIB_BTOWC
 HAVE_CRTDEFS_H
 HAVE_WINT_T
 NEXT_AS_FIRST_DIRECTIVE_WCHAR_H
 NEXT_WCHAR_H
-REPLACE_WCSTOK
-REPLACE_WCSFTIME
-REPLACE_WCSWIDTH
-REPLACE_WCWIDTH
-REPLACE_WCSNRTOMBS
-REPLACE_WCSRTOMBS
-REPLACE_WCRTOMB
-REPLACE_MBSNRTOWCS
-REPLACE_MBSRTOWCS
-REPLACE_MBRLEN
-REPLACE_MBRTOWC
-REPLACE_MBSINIT
-REPLACE_WCTOB
-REPLACE_BTOWC
-REPLACE_MBSTATE_T
-HAVE_DECL_WCWIDTH
-HAVE_DECL_WCSDUP
-HAVE_DECL_WCTOB
-HAVE_WCSFTIME
-HAVE_WCSWIDTH
-HAVE_WCSTOK
-HAVE_WCSSTR
-HAVE_WCSPBRK
-HAVE_WCSSPN
-HAVE_WCSCSPN
-HAVE_WCSRCHR
-HAVE_WCSCHR
-HAVE_WCSDUP
-HAVE_WCSXFRM
-HAVE_WCSCOLL
-HAVE_WCSNCASECMP
-HAVE_WCSCASECMP
-HAVE_WCSNCMP
-HAVE_WCSCMP
-HAVE_WCSNCAT
-HAVE_WCSCAT
-HAVE_WCPNCPY
-HAVE_WCSNCPY
-HAVE_WCPCPY
-HAVE_WCSCPY
-HAVE_WCSNLEN
-HAVE_WCSLEN
-HAVE_WMEMSET
-HAVE_WMEMPCPY
-HAVE_WMEMMOVE
-HAVE_WMEMCPY
-HAVE_WMEMCMP
-HAVE_WMEMCHR
-HAVE_WCSNRTOMBS
-HAVE_WCSRTOMBS
-HAVE_WCRTOMB
-HAVE_MBSNRTOWCS
-HAVE_MBSRTOWCS
-HAVE_MBRLEN
-HAVE_MBRTOWC
-HAVE_MBSINIT
-HAVE_BTOWC
 HAVE_FEATURES_H
 GL_COND_OBJ_UTIMENSAT_FALSE
 GL_COND_OBJ_UTIMENSAT_TRUE
@@ -809,6 +711,7 @@ GL_GNULIB_TIME_R
 GL_GNULIB_TIMESPEC_GETRES
 GL_GNULIB_TIMESPEC_GET
 GL_GNULIB_TIMEGM
+GL_GNULIB_TIME
 GL_GNULIB_STRPTIME
 GL_GNULIB_STRFTIME
 GL_GNULIB_NANOSLEEP
@@ -822,15 +725,16 @@ SYS_TIME_H_DEFINES_STRUCT_TIMESPEC
 TIME_H_DEFINES_STRUCT_TIMESPEC
 NEXT_AS_FIRST_DIRECTIVE_TIME_H
 NEXT_TIME_H
-REPLACE_LOCALTIME
-REPLACE_GMTIME
-GNULIB_GETTIMEOFDAY
 REPLACE_TZSET
+REPLACE_TIMESPEC_GET
 REPLACE_TIMEGM
+REPLACE_TIME
 REPLACE_STRFTIME
 REPLACE_NANOSLEEP
 REPLACE_MKTIME
 REPLACE_LOCALTIME_R
+REPLACE_LOCALTIME
+REPLACE_GMTIME
 REPLACE_CTIME
 HAVE_TIMEZONE_T
 HAVE_TIMESPEC_GETRES
@@ -889,13 +793,9 @@ NEXT_STDDEF_H
 HAVE_WCHAR_T
 HAVE_MAX_ALIGN_T
 REPLACE_NULL
-GL_GENERATE_STDBOOL_H_FALSE
-GL_GENERATE_STDBOOL_H_TRUE
-STDBOOL_H
-HAVE__BOOL
-GL_GENERATE_STDALIGN_H_FALSE
-GL_GENERATE_STDALIGN_H_TRUE
-STDALIGN_H
+GL_GENERATE_STDCKDINT_H_FALSE
+GL_GENERATE_STDCKDINT_H_TRUE
+STDCKDINT_H
 GL_COND_OBJ_STAT_FALSE
 GL_COND_OBJ_STAT_TRUE
 GL_COND_OBJ_SIGNBIT3_FALSE
@@ -970,6 +870,7 @@ GL_GNULIB_STRCHRNUL
 GL_GNULIB_STPNCPY
 GL_GNULIB_STPCPY
 GL_GNULIB_RAWMEMCHR
+GL_GNULIB_MEMSET_EXPLICIT
 GL_GNULIB_MEMRCHR
 GL_GNULIB_MEMPCPY
 GL_GNULIB_MEMMEM
@@ -993,6 +894,8 @@ REPLACE_STRNCAT
 REPLACE_STRDUP
 REPLACE_STRCHRNUL
 REPLACE_STPNCPY
+REPLACE_STPCPY
+REPLACE_MEMPCPY
 REPLACE_MEMMEM
 REPLACE_MEMCHR
 REPLACE_FFSLL
@@ -1014,12 +917,126 @@ HAVE_STPNCPY
 HAVE_STPCPY
 HAVE_RAWMEMCHR
 HAVE_DECL_MEMRCHR
+HAVE_MEMSET_EXPLICIT
 HAVE_MEMPCPY
 HAVE_DECL_MEMMEM
 HAVE_FFSLL
 HAVE_FFSL
 HAVE_EXPLICIT_BZERO
 HAVE_MBSLEN
+GL_GNULIB_MDA_WCSDUP
+GL_GNULIB_WGETCWD
+GL_GNULIB_WCSFTIME
+GL_GNULIB_WCSWIDTH
+GL_GNULIB_WCSTOK
+GL_GNULIB_WCSSTR
+GL_GNULIB_WCSPBRK
+GL_GNULIB_WCSSPN
+GL_GNULIB_WCSCSPN
+GL_GNULIB_WCSRCHR
+GL_GNULIB_WCSCHR
+GL_GNULIB_WCSDUP
+GL_GNULIB_WCSXFRM
+GL_GNULIB_WCSCOLL
+GL_GNULIB_WCSNCASECMP
+GL_GNULIB_WCSCASECMP
+GL_GNULIB_WCSNCMP
+GL_GNULIB_WCSCMP
+GL_GNULIB_WCSNCAT
+GL_GNULIB_WCSCAT
+GL_GNULIB_WCPNCPY
+GL_GNULIB_WCSNCPY
+GL_GNULIB_WCPCPY
+GL_GNULIB_WCSCPY
+GL_GNULIB_WCSNLEN
+GL_GNULIB_WCSLEN
+GL_GNULIB_WMEMSET
+GL_GNULIB_WMEMPCPY
+GL_GNULIB_WMEMMOVE
+GL_GNULIB_WMEMCPY
+GL_GNULIB_WMEMCMP
+GL_GNULIB_WMEMCHR
+GL_GNULIB_WCWIDTH
+GL_GNULIB_WCSNRTOMBS
+GL_GNULIB_WCSRTOMBS
+GL_GNULIB_WCRTOMB
+GL_GNULIB_MBSNRTOWCS
+GL_GNULIB_MBSRTOWCS
+GL_GNULIB_MBRLEN
+GL_GNULIB_MBRTOWC
+GL_GNULIB_MBSZERO
+GL_GNULIB_MBSINIT
+GL_GNULIB_WCTOB
+GL_GNULIB_BTOWC
+LOCALE_ZH_CN
+LC_MONETARY_IMPLEMENTED
+LC_TIME_IMPLEMENTED
+LC_NUMERIC_IMPLEMENTED
+LC_COLLATE_IMPLEMENTED
+LOCALE_FR_UTF8
+LOCALE_JA
+REPLACE_WMEMPCPY
+REPLACE_WMEMCMP
+REPLACE_WCSTOK
+REPLACE_WCSSTR
+REPLACE_WCSNCMP
+REPLACE_WCSCMP
+REPLACE_WCSFTIME
+REPLACE_WCSWIDTH
+REPLACE_WCWIDTH
+REPLACE_WCSNRTOMBS
+REPLACE_WCSRTOMBS
+REPLACE_WCRTOMB
+REPLACE_MBSNRTOWCS
+REPLACE_MBSRTOWCS
+REPLACE_MBRLEN
+REPLACE_MBRTOWC
+REPLACE_MBSINIT
+REPLACE_WCTOB
+REPLACE_BTOWC
+REPLACE_MBSTATE_T
+HAVE_DECL_WCWIDTH
+HAVE_DECL_WCSDUP
+HAVE_DECL_WCTOB
+HAVE_WCSFTIME
+HAVE_WCSWIDTH
+HAVE_WCSTOK
+HAVE_WCSSTR
+HAVE_WCSPBRK
+HAVE_WCSSPN
+HAVE_WCSCSPN
+HAVE_WCSRCHR
+HAVE_WCSCHR
+HAVE_WCSDUP
+HAVE_WCSXFRM
+HAVE_WCSCOLL
+HAVE_WCSNCASECMP
+HAVE_WCSCASECMP
+HAVE_WCSNCMP
+HAVE_WCSCMP
+HAVE_WCSNCAT
+HAVE_WCSCAT
+HAVE_WCPNCPY
+HAVE_WCSNCPY
+HAVE_WCPCPY
+HAVE_WCSCPY
+HAVE_WCSNLEN
+HAVE_WCSLEN
+HAVE_WMEMSET
+HAVE_WMEMPCPY
+HAVE_WMEMMOVE
+HAVE_WMEMCPY
+HAVE_WMEMCMP
+HAVE_WMEMCHR
+HAVE_WCSNRTOMBS
+HAVE_WCSRTOMBS
+HAVE_WCRTOMB
+HAVE_MBSNRTOWCS
+HAVE_MBSRTOWCS
+HAVE_MBRLEN
+HAVE_MBRTOWC
+HAVE_MBSINIT
+HAVE_BTOWC
 NEXT_AS_FIRST_DIRECTIVE_MATH_H
 NEXT_MATH_H
 GL_COND_OBJ_LSTAT_FALSE
@@ -1040,6 +1057,10 @@ INT64_MAX_EQ_LONG_MAX
 INT32_MAX_LT_INTMAX_MAX
 REPLACE_STRTOUMAX
 REPLACE_STRTOIMAX
+REPLACE_IMAXDIV
+REPLACE_IMAXABS
+HAVE_IMAXDIV
+HAVE_IMAXABS
 HAVE_IMAXDIV_T
 HAVE_DECL_STRTOUMAX
 HAVE_DECL_STRTOIMAX
@@ -1085,6 +1106,8 @@ HAVE_STRUCT_TIMEVAL
 HAVE_GETTIMEOFDAY
 LTLIBINTL
 LIBINTL
+GL_COND_OBJ_GETPROGNAME_FALSE
+GL_COND_OBJ_GETPROGNAME_TRUE
 GL_COND_OBJ_GETOPT_FALSE
 GL_COND_OBJ_GETOPT_TRUE
 GL_GENERATE_GETOPT_CDEFS_H_FALSE
@@ -1208,7 +1231,9 @@ HAVE_FSEEKO
 HAVE_DPRINTF
 HAVE_DECL_VSNPRINTF
 HAVE_DECL_SNPRINTF
+HAVE_DECL_PUTW
 HAVE_DECL_OBSTACK_PRINTF
+HAVE_DECL_GETW
 HAVE_DECL_GETLINE
 HAVE_DECL_GETDELIM
 HAVE_DECL_FTELLO
@@ -1240,6 +1265,7 @@ GL_GNULIB_FUTIMENS
 GL_GNULIB_FSTATAT
 GL_GNULIB_FSTAT
 GL_GNULIB_FCHMODAT
+GL_GNULIB_CHMOD
 WINDOWS_64_BIT_ST_SIZE
 WINDOWS_STAT_TIMESPEC
 NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H
@@ -1258,6 +1284,7 @@ REPLACE_FUTIMENS
 REPLACE_FSTATAT
 REPLACE_FSTAT
 REPLACE_FCHMODAT
+REPLACE_CHMOD
 HAVE_UTIMENSAT
 HAVE_MKNODAT
 HAVE_MKNOD
@@ -1280,6 +1307,9 @@ GL_GNULIB_MDA_J0
 GL_GNULIB_TRUNCL
 GL_GNULIB_TRUNCF
 GL_GNULIB_TRUNC
+GL_GNULIB_TOTALORDERL
+GL_GNULIB_TOTALORDERF
+GL_GNULIB_TOTALORDER
 GL_GNULIB_TANHF
 GL_GNULIB_TANL
 GL_GNULIB_TANF
@@ -1319,6 +1349,7 @@ GL_GNULIB_LOGF
 GL_GNULIB_LOG
 GL_GNULIB_LDEXPL
 GL_GNULIB_LDEXPF
+GL_GNULIB_LDEXP
 GL_GNULIB_ISNANL
 GL_GNULIB_ISNAND
 GL_GNULIB_ISNANF
@@ -1375,6 +1406,9 @@ GL_GNULIB_ACOSF
 REPLACE_TRUNCL
 REPLACE_TRUNCF
 REPLACE_TRUNC
+REPLACE_TOTALORDERL
+REPLACE_TOTALORDERF
+REPLACE_TOTALORDER
 REPLACE_TANHF
 REPLACE_TANF
 REPLACE_SQRTL
@@ -1410,6 +1444,7 @@ REPLACE_LOGL
 REPLACE_LOGF
 REPLACE_LOG
 REPLACE_LDEXPL
+REPLACE_LDEXP
 REPLACE_ISNAN
 REPLACE_ISINF
 REPLACE_ISFINITE
@@ -1487,6 +1522,9 @@ HAVE_DECL_CBRTF
 HAVE_DECL_ATANL
 HAVE_DECL_ASINL
 HAVE_DECL_ACOSL
+HAVE_TOTALORDERL
+HAVE_TOTALORDERF
+HAVE_TOTALORDER
 HAVE_TANHF
 HAVE_TANL
 HAVE_TANF
@@ -1583,10 +1621,18 @@ GL_COND_OBJ_FCHDIR_TRUE
 GL_COND_OBJ_FACCESSAT_FALSE
 GL_COND_OBJ_FACCESSAT_TRUE
 LIB_EACCESS
+EUIDACCESS_LIBGEN
 GL_COND_OBJ_EUIDACCESS_FALSE
 GL_COND_OBJ_EUIDACCESS_TRUE
 GL_COND_OBJ_ERROR_FALSE
 GL_COND_OBJ_ERROR_TRUE
+REPLACE_ERROR_AT_LINE
+REPLACE_ERROR
+HAVE_ERROR_AT_LINE
+HAVE_ERROR
+HAVE_ERROR_H
+NEXT_AS_FIRST_DIRECTIVE_ERROR_H
+NEXT_ERROR_H
 GL_GENERATE_ERRNO_H_FALSE
 GL_GENERATE_ERRNO_H_TRUE
 ERRNO_H
@@ -1607,10 +1653,6 @@ GL_COND_OBJ_DIRFD_TRUE
 HAVE_DIRENT_H
 NEXT_AS_FIRST_DIRECTIVE_DIRENT_H
 NEXT_DIRENT_H
-PRAGMA_COLUMNS
-PRAGMA_SYSTEM_HEADER
-INCLUDE_NEXT_AS_FIRST_DIRECTIVE
-INCLUDE_NEXT
 GL_GNULIB_ALPHASORT
 GL_GNULIB_SCANDIR
 GL_GNULIB_FDOPENDIR
@@ -1621,9 +1663,12 @@ GL_GNULIB_READDIR
 GL_GNULIB_OPENDIR
 GL_COND_OBJ_CLOSEDIR_FALSE
 GL_COND_OBJ_CLOSEDIR_TRUE
+DIR_HAS_FD_MEMBER
 REPLACE_FDOPENDIR
 REPLACE_DIRFD
 REPLACE_CLOSEDIR
+REPLACE_REWINDDIR
+REPLACE_READDIR
 REPLACE_OPENDIR
 HAVE_ALPHASORT
 HAVE_SCANDIR
@@ -1639,187 +1684,9 @@ GL_COND_OBJ_CLOSE_TRUE
 HAVE_WINSOCK2_H
 HAVE_MSVC_INVALID_PARAMETER_HANDLER
 LIB_CLOCK_GETTIME
+CLOCK_TIME_LIB
 GL_COND_OBJ_CHDIR_LONG_FALSE
 GL_COND_OBJ_CHDIR_LONG_TRUE
-UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS
-UNISTD_H_HAVE_WINSOCK2_H
-UNISTD_H_HAVE_SYS_RANDOM_H
-REPLACE_WRITE
-REPLACE_USLEEP
-REPLACE_UNLINKAT
-REPLACE_UNLINK
-REPLACE_TTYNAME_R
-REPLACE_TRUNCATE
-REPLACE_SYMLINKAT
-REPLACE_SYMLINK
-REPLACE_SLEEP
-REPLACE_RMDIR
-REPLACE_READLINKAT
-REPLACE_READLINK
-REPLACE_READ
-REPLACE_PWRITE
-REPLACE_PREAD
-REPLACE_LSEEK
-REPLACE_LINKAT
-REPLACE_LINK
-REPLACE_LCHOWN
-REPLACE_ISATTY
-REPLACE_GETPASS_FOR_GETPASS_GNU
-REPLACE_GETPASS
-REPLACE_GETPAGESIZE
-REPLACE_GETGROUPS
-REPLACE_GETLOGIN_R
-REPLACE_GETDTABLESIZE
-REPLACE_GETDOMAINNAME
-REPLACE_GETCWD
-REPLACE_FTRUNCATE
-REPLACE_FCHOWNAT
-REPLACE_FACCESSAT
-REPLACE_EXECVPE
-REPLACE_EXECVP
-REPLACE_EXECVE
-REPLACE_EXECV
-REPLACE_EXECLP
-REPLACE_EXECLE
-REPLACE_EXECL
-REPLACE_DUP2
-REPLACE_DUP
-REPLACE_COPY_FILE_RANGE
-REPLACE_CLOSE
-REPLACE_CHOWN
-REPLACE_ACCESS
-HAVE_SYS_PARAM_H
-HAVE_OS_H
-HAVE_DECL_TTYNAME_R
-HAVE_DECL_TRUNCATE
-HAVE_DECL_SETHOSTNAME
-HAVE_DECL_GETUSERSHELL
-HAVE_DECL_GETPAGESIZE
-HAVE_DECL_GETLOGIN_R
-HAVE_DECL_GETLOGIN
-HAVE_DECL_GETDOMAINNAME
-HAVE_DECL_FDATASYNC
-HAVE_DECL_FCHDIR
-HAVE_DECL_EXECVPE
-HAVE_DECL_ENVIRON
-HAVE_USLEEP
-HAVE_UNLINKAT
-HAVE_SYMLINKAT
-HAVE_SYMLINK
-HAVE_SLEEP
-HAVE_SETHOSTNAME
-HAVE_READLINKAT
-HAVE_READLINK
-HAVE_PWRITE
-HAVE_PREAD
-HAVE_PIPE2
-HAVE_PIPE
-HAVE_LINKAT
-HAVE_LINK
-HAVE_LCHOWN
-HAVE_GROUP_MEMBER
-HAVE_GETPASS
-HAVE_GETPAGESIZE
-HAVE_GETLOGIN
-HAVE_GETHOSTNAME
-HAVE_GETGROUPS
-HAVE_GETENTROPY
-HAVE_GETDTABLESIZE
-HAVE_FTRUNCATE
-HAVE_FSYNC
-HAVE_FDATASYNC
-HAVE_FCHOWNAT
-HAVE_FCHDIR
-HAVE_FACCESSAT
-HAVE_EXECVPE
-HAVE_EUIDACCESS
-HAVE_DUP3
-HAVE_COPY_FILE_RANGE
-HAVE_CHOWN
-GL_GNULIB_MDA_WRITE
-GL_GNULIB_MDA_UNLINK
-GL_GNULIB_MDA_SWAB
-GL_GNULIB_MDA_RMDIR
-GL_GNULIB_MDA_READ
-GL_GNULIB_MDA_LSEEK
-GL_GNULIB_MDA_ISATTY
-GL_GNULIB_MDA_GETPID
-GL_GNULIB_MDA_GETCWD
-GL_GNULIB_MDA_EXECVPE
-GL_GNULIB_MDA_EXECVP
-GL_GNULIB_MDA_EXECVE
-GL_GNULIB_MDA_EXECV
-GL_GNULIB_MDA_EXECLP
-GL_GNULIB_MDA_EXECLE
-GL_GNULIB_MDA_EXECL
-GL_GNULIB_MDA_DUP2
-GL_GNULIB_MDA_DUP
-GL_GNULIB_MDA_CLOSE
-GL_GNULIB_MDA_CHDIR
-GL_GNULIB_MDA_ACCESS
-GL_GNULIB_WRITE
-GL_GNULIB_USLEEP
-GL_GNULIB_UNLINKAT
-GL_GNULIB_UNLINK
-GL_GNULIB_UNISTD_H_SIGPIPE
-GL_GNULIB_UNISTD_H_NONBLOCKING
-GL_GNULIB_UNISTD_H_GETOPT
-GL_GNULIB_TTYNAME_R
-GL_GNULIB_TRUNCATE
-GL_GNULIB_SYMLINKAT
-GL_GNULIB_SYMLINK
-GL_GNULIB_SLEEP
-GL_GNULIB_SETHOSTNAME
-GL_GNULIB_RMDIR
-GL_GNULIB_READLINKAT
-GL_GNULIB_READLINK
-GL_GNULIB_READ
-GL_GNULIB_PWRITE
-GL_GNULIB_PREAD
-GL_GNULIB_PIPE2
-GL_GNULIB_PIPE
-GL_GNULIB_LSEEK
-GL_GNULIB_LINKAT
-GL_GNULIB_LINK
-GL_GNULIB_LCHOWN
-GL_GNULIB_ISATTY
-GL_GNULIB_GROUP_MEMBER
-GL_GNULIB_GETUSERSHELL
-GL_GNULIB_GETPASS_GNU
-GL_GNULIB_GETPASS
-GL_GNULIB_GETPAGESIZE
-GL_GNULIB_GETOPT_POSIX
-GL_GNULIB_GETLOGIN_R
-GL_GNULIB_GETLOGIN
-GL_GNULIB_GETHOSTNAME
-GL_GNULIB_GETGROUPS
-GL_GNULIB_GETENTROPY
-GL_GNULIB_GETDTABLESIZE
-GL_GNULIB_GETDOMAINNAME
-GL_GNULIB_GETCWD
-GL_GNULIB_FTRUNCATE
-GL_GNULIB_FSYNC
-GL_GNULIB_FDATASYNC
-GL_GNULIB_FCHOWNAT
-GL_GNULIB_FCHDIR
-GL_GNULIB_FACCESSAT
-GL_GNULIB_EXECVPE
-GL_GNULIB_EXECVP
-GL_GNULIB_EXECVE
-GL_GNULIB_EXECV
-GL_GNULIB_EXECLP
-GL_GNULIB_EXECLE
-GL_GNULIB_EXECL
-GL_GNULIB_EUIDACCESS
-GL_GNULIB_ENVIRON
-GL_GNULIB_DUP3
-GL_GNULIB_DUP2
-GL_GNULIB_DUP
-GL_GNULIB_COPY_FILE_RANGE
-GL_GNULIB_CLOSE
-GL_GNULIB_CHOWN
-GL_GNULIB_CHDIR
-GL_GNULIB_ACCESS
 GL_COND_OBJ_CANONICALIZE_LGPL_FALSE
 GL_COND_OBJ_CANONICALIZE_LGPL_TRUE
 GL_GNULIB_MDA_PUTENV
@@ -1846,6 +1713,7 @@ GL_GNULIB_REALLOC_GNU
 GL_GNULIB_REALLOCARRAY
 GL_GNULIB_RANDOM_R
 GL_GNULIB_RANDOM
+GL_GNULIB_RAND
 GL_GNULIB_QSORT_R
 GL_GNULIB_PUTENV
 GL_GNULIB_PTSNAME_R
@@ -1858,10 +1726,12 @@ GL_GNULIB_MKOSTEMPS
 GL_GNULIB_MKOSTEMP
 GL_GNULIB_MKDTEMP
 GL_GNULIB_MBTOWC
+GL_GNULIB_MBSTOWCS
 GL_GNULIB_MALLOC_POSIX
 GL_GNULIB_MALLOC_GNU
 GL_GNULIB_GRANTPT
 GL_GNULIB_GETSUBOPT
+GL_GNULIB_GETPROGNAME
 GL_GNULIB_GETLOADAVG
 GL_GNULIB_FREE_POSIX
 GL_GNULIB_CANONICALIZE_FILE_NAME
@@ -1886,21 +1756,31 @@ REPLACE_REALLOC_FOR_REALLOC_POSIX
 REPLACE_REALLOC_FOR_REALLOC_GNU
 REPLACE_RANDOM_R
 REPLACE_RANDOM
+REPLACE_RAND
 REPLACE_QSORT_R
 REPLACE_PUTENV
 REPLACE_PTSNAME_R
 REPLACE_PTSNAME
+REPLACE_POSIX_OPENPT
 REPLACE_POSIX_MEMALIGN
 REPLACE_MKSTEMP
+REPLACE_MKOSTEMPS
+REPLACE_MKOSTEMP
 REPLACE_MBTOWC
+REPLACE_MBSTOWCS
+REPLACE_MB_CUR_MAX
 REPLACE_MALLOC_FOR_MALLOC_POSIX
 REPLACE_MALLOC_FOR_MALLOC_GNU
 REPLACE_INITSTATE
+REPLACE_GETSUBOPT
+REPLACE_GETPROGNAME
+REPLACE_GETLOADAVG
 REPLACE_FREE
 REPLACE_CANONICALIZE_FILE_NAME
 REPLACE_CALLOC_FOR_CALLOC_POSIX
 REPLACE_CALLOC_FOR_CALLOC_GNU
 REPLACE_ALIGNED_ALLOC
+REPLACE__EXIT
 HAVE_DECL_UNSETENV
 HAVE_UNLOCKPT
 HAVE_SYS_LOADAVG_H
@@ -1937,6 +1817,8 @@ HAVE_DECL_INITSTATE
 HAVE_INITSTATE
 HAVE_GRANTPT
 HAVE_GETSUBOPT
+HAVE_GETPROGNAME
+HAVE_DECL_PROGRAM_INVOCATION_NAME
 HAVE_DECL_GETLOADAVG
 HAVE_DECL_GCVT
 HAVE_DECL_FCVT
@@ -1945,11 +1827,207 @@ HAVE_CANONICALIZE_FILE_NAME
 HAVE_ATOLL
 HAVE_ALIGNED_ALLOC
 HAVE__EXIT
+GL_GENERATE_ASSERT_H_FALSE
+GL_GENERATE_ASSERT_H_TRUE
+ASSERT_H
+NEXT_AS_FIRST_DIRECTIVE_ASSERT_H
+NEXT_ASSERT_H
+PRAGMA_COLUMNS
+PRAGMA_SYSTEM_HEADER
+INCLUDE_NEXT_AS_FIRST_DIRECTIVE
+INCLUDE_NEXT
 GL_GENERATE_ALLOCA_H_FALSE
 GL_GENERATE_ALLOCA_H_TRUE
 ALLOCA_H
 HAVE_ALLOCA_H
 ALLOCA
+GL_GNULIB_MDA_WRITE
+GL_GNULIB_MDA_UNLINK
+GL_GNULIB_MDA_SWAB
+GL_GNULIB_MDA_RMDIR
+GL_GNULIB_MDA_READ
+GL_GNULIB_MDA_LSEEK
+GL_GNULIB_MDA_ISATTY
+GL_GNULIB_MDA_GETPID
+GL_GNULIB_MDA_GETCWD
+GL_GNULIB_MDA_EXECVPE
+GL_GNULIB_MDA_EXECVP
+GL_GNULIB_MDA_EXECVE
+GL_GNULIB_MDA_EXECV
+GL_GNULIB_MDA_EXECLP
+GL_GNULIB_MDA_EXECLE
+GL_GNULIB_MDA_EXECL
+GL_GNULIB_MDA_DUP2
+GL_GNULIB_MDA_DUP
+GL_GNULIB_MDA_CLOSE
+GL_GNULIB_MDA_CHDIR
+GL_GNULIB_MDA_ACCESS
+GL_GNULIB_WRITE
+GL_GNULIB_USLEEP
+GL_GNULIB_UNLINKAT
+GL_GNULIB_UNLINK
+GL_GNULIB_UNISTD_H_SIGPIPE
+GL_GNULIB_UNISTD_H_NONBLOCKING
+GL_GNULIB_UNISTD_H_GETOPT
+GL_GNULIB_TTYNAME_R
+GL_GNULIB_TRUNCATE
+GL_GNULIB_SYMLINKAT
+GL_GNULIB_SYMLINK
+GL_GNULIB_SLEEP
+GL_GNULIB_SETHOSTNAME
+GL_GNULIB_RMDIR
+GL_GNULIB_READLINKAT
+GL_GNULIB_READLINK
+GL_GNULIB_READ
+GL_GNULIB_PWRITE
+GL_GNULIB_PREAD
+GL_GNULIB_PIPE2
+GL_GNULIB_PIPE
+GL_GNULIB_LSEEK
+GL_GNULIB_LINKAT
+GL_GNULIB_LINK
+GL_GNULIB_LCHOWN
+GL_GNULIB_ISATTY
+GL_GNULIB_GROUP_MEMBER
+GL_GNULIB_GETUSERSHELL
+GL_GNULIB_GETPASS_GNU
+GL_GNULIB_GETPASS
+GL_GNULIB_GETPAGESIZE
+GL_GNULIB_GETOPT_POSIX
+GL_GNULIB_GETLOGIN_R
+GL_GNULIB_GETLOGIN
+GL_GNULIB_GETHOSTNAME
+GL_GNULIB_GETGROUPS
+GL_GNULIB_GETENTROPY
+GL_GNULIB_GETDTABLESIZE
+GL_GNULIB_GETDOMAINNAME
+GL_GNULIB_GETCWD
+GL_GNULIB_FTRUNCATE
+GL_GNULIB_FSYNC
+GL_GNULIB_FDATASYNC
+GL_GNULIB_FCHOWNAT
+GL_GNULIB_FCHDIR
+GL_GNULIB_FACCESSAT
+GL_GNULIB_EXECVPE
+GL_GNULIB_EXECVP
+GL_GNULIB_EXECVE
+GL_GNULIB_EXECV
+GL_GNULIB_EXECLP
+GL_GNULIB_EXECLE
+GL_GNULIB_EXECL
+GL_GNULIB_EUIDACCESS
+GL_GNULIB_ENVIRON
+GL_GNULIB_DUP3
+GL_GNULIB_DUP2
+GL_GNULIB_DUP
+GL_GNULIB_COPY_FILE_RANGE
+GL_GNULIB_CLOSE
+GL_GNULIB_CHOWN
+GL_GNULIB_CHDIR
+GL_GNULIB_ACCESS
+GL_COND_OBJ_ACCESS_FALSE
+GL_COND_OBJ_ACCESS_TRUE
+UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS
+UNISTD_H_HAVE_WINSOCK2_H
+UNISTD_H_HAVE_SYS_RANDOM_H
+REPLACE_WRITE
+REPLACE_USLEEP
+REPLACE_UNLINKAT
+REPLACE_UNLINK
+REPLACE_TTYNAME_R
+REPLACE_TRUNCATE
+REPLACE_SYMLINKAT
+REPLACE_SYMLINK
+REPLACE_SLEEP
+REPLACE_SETHOSTNAME
+REPLACE_RMDIR
+REPLACE_READLINKAT
+REPLACE_READLINK
+REPLACE_READ
+REPLACE_PWRITE
+REPLACE_PREAD
+REPLACE_PIPE2
+REPLACE_LSEEK
+REPLACE_LINKAT
+REPLACE_LINK
+REPLACE_LCHOWN
+REPLACE_ISATTY
+REPLACE_GETPASS_FOR_GETPASS_GNU
+REPLACE_GETPASS
+REPLACE_GETPAGESIZE
+REPLACE_GETGROUPS
+REPLACE_GETLOGIN_R
+REPLACE_GETENTROPY
+REPLACE_GETDTABLESIZE
+REPLACE_GETDOMAINNAME
+REPLACE_GETCWD
+REPLACE_FTRUNCATE
+REPLACE_FDATASYNC
+REPLACE_FCHOWNAT
+REPLACE_FCHDIR
+REPLACE_FACCESSAT
+REPLACE_EXECVPE
+REPLACE_EXECVP
+REPLACE_EXECVE
+REPLACE_EXECV
+REPLACE_EXECLP
+REPLACE_EXECLE
+REPLACE_EXECL
+REPLACE_DUP3
+REPLACE_DUP2
+REPLACE_DUP
+REPLACE_COPY_FILE_RANGE
+REPLACE_CLOSE
+REPLACE_CHOWN
+REPLACE_ACCESS
+HAVE_SYS_PARAM_H
+HAVE_OS_H
+HAVE_DECL_TTYNAME_R
+HAVE_DECL_TRUNCATE
+HAVE_DECL_SETHOSTNAME
+HAVE_DECL_GETUSERSHELL
+HAVE_DECL_GETPAGESIZE
+HAVE_DECL_GETLOGIN_R
+HAVE_DECL_GETLOGIN
+HAVE_DECL_GETDOMAINNAME
+HAVE_DECL_FDATASYNC
+HAVE_DECL_FCHDIR
+HAVE_DECL_EXECVPE
+HAVE_DECL_ENVIRON
+HAVE_USLEEP
+HAVE_UNLINKAT
+HAVE_SYMLINKAT
+HAVE_SYMLINK
+HAVE_SLEEP
+HAVE_SETHOSTNAME
+HAVE_READLINKAT
+HAVE_READLINK
+HAVE_PWRITE
+HAVE_PREAD
+HAVE_PIPE2
+HAVE_PIPE
+HAVE_LINKAT
+HAVE_LINK
+HAVE_LCHOWN
+HAVE_GROUP_MEMBER
+HAVE_GETPASS
+HAVE_GETPAGESIZE
+HAVE_GETLOGIN
+HAVE_GETHOSTNAME
+HAVE_GETGROUPS
+HAVE_GETENTROPY
+HAVE_GETDTABLESIZE
+HAVE_FTRUNCATE
+HAVE_FSYNC
+HAVE_FDATASYNC
+HAVE_FCHOWNAT
+HAVE_FCHDIR
+HAVE_FACCESSAT
+HAVE_EXECVPE
+HAVE_EUIDACCESS
+HAVE_DUP3
+HAVE_COPY_FILE_RANGE
+HAVE_CHOWN
 GL_COND_LIBTOOL_FALSE
 GL_COND_LIBTOOL_TRUE
 RANLIB
@@ -2065,11 +2143,11 @@ enable_maintainer_mode
 enable_dependency_tracking
 enable_openmp
 enable_largefile
-enable_year2038
 enable_cross_guesses
 with_eprefix
 enable_qmanifest
 enable_qtegrity
+enable_year2038
 '
       ac_precious_vars='build_alias
 host_alias
@@ -2729,11 +2807,11 @@ Optional Features:
                           speeds up one-time build
   --disable-openmp        do not use OpenMP
   --disable-largefile     omit support for large files
-  --disable-year2038      omit support for timestamps past the year 2038
   --enable-cross-guesses={conservative|risky}
                           specify policy for cross-compilation guesses
   --enable-qmanifest      support qmanifest applet
   --enable-qtegrity       support qtegrity applet
+  --enable-year2038       support timestamps after 2038
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -3004,11 +3082,10 @@ fi
 
 } # ac_fn_c_try_cpp
 
-# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
-# -------------------------------------------
-# Tests whether TYPE exists after having included INCLUDES, setting cache
-# variable VAR accordingly.
-ac_fn_c_check_type ()
+# ac_fn_c_check_func LINENO FUNC VAR
+# ----------------------------------
+# Tests whether FUNC exists, setting the cache variable VAR accordingly
+ac_fn_c_check_func ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
@@ -3017,49 +3094,55 @@ if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
-  eval "$3=no"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$4
-int
-main (void)
-{
-if (sizeof ($2))
-	 return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
-then :
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-$4
+/* Define $2 to an innocuous variant, in case <limits.h> declares $2.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define $2 innocuous_$2
+
+/* System header to define __stub macros and hopefully few prototypes,
+   which can conflict with char $2 (void); below.  */
+
+#include <limits.h>
+#undef $2
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char $2 (void);
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined __stub_$2 || defined __stub___$2
+choke me
+#endif
+
 int
 main (void)
 {
-if (sizeof (($2)))
-	    return 0;
+return $2 ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"
+if ac_fn_c_try_link "$LINENO"
 then :
-
-else $as_nop
   eval "$3=yes"
+else $as_nop
+  eval "$3=no"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
-} # ac_fn_c_check_type
+} # ac_fn_c_check_func
 
 # ac_fn_c_try_run LINENO
 # ----------------------
@@ -3104,10 +3187,11 @@ fi
 
 } # ac_fn_c_try_run
 
-# ac_fn_c_check_func LINENO FUNC VAR
-# ----------------------------------
-# Tests whether FUNC exists, setting the cache variable VAR accordingly
-ac_fn_c_check_func ()
+# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
+# -------------------------------------------
+# Tests whether TYPE exists after having included INCLUDES, setting cache
+# variable VAR accordingly.
+ac_fn_c_check_type ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
@@ -3116,55 +3200,49 @@ if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
+  eval "$3=no"
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-/* Define $2 to an innocuous variant, in case <limits.h> declares $2.
-   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
-#define $2 innocuous_$2
-
-/* System header to define __stub macros and hopefully few prototypes,
-   which can conflict with char $2 (); below.  */
-
-#include <limits.h>
-#undef $2
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char $2 ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined __stub_$2 || defined __stub___$2
-choke me
-#endif
-
+$4
 int
 main (void)
 {
-return $2 ();
+if (sizeof ($2))
+	 return 0;
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"
+if ac_fn_c_try_compile "$LINENO"
 then :
-  eval "$3=yes"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+int
+main (void)
+{
+if (sizeof (($2)))
+	    return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
 else $as_nop
-  eval "$3=no"
+  eval "$3=yes"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
-} # ac_fn_c_check_func
+} # ac_fn_c_check_type
 
 # ac_fn_check_decl LINENO SYMBOL VAR INCLUDES EXTRA-OPTIONS FLAG-VAR
 # ------------------------------------------------------------------
@@ -3781,9 +3859,7 @@ struct stat;
 /* Most of the following tests are stolen from RCS 5.7 src/conf.sh.  */
 struct buf { int x; };
 struct buf * (*rcsopen) (struct buf *, struct stat *, int);
-static char *e (p, i)
-     char **p;
-     int i;
+static char *e (char **p, int i)
 {
   return p[i];
 }
@@ -3834,6 +3910,7 @@ extern int puts (const char *);
 extern int printf (const char *, ...);
 extern int dprintf (int, const char *, ...);
 extern void *malloc (size_t);
+extern void free (void *);
 
 // Check varargs macros.  These examples are taken from C99 6.10.3.5.
 // dprintf is used instead of fprintf to avoid needing to declare
@@ -4085,32 +4162,29 @@ as_fn_append ac_header_c_list " sys/types.h sys_types_h HAVE_SYS_TYPES_H"
 as_fn_append ac_header_c_list " unistd.h unistd_h HAVE_UNISTD_H"
 as_fn_append ac_header_c_list " wchar.h wchar_h HAVE_WCHAR_H"
 as_fn_append ac_header_c_list " minix/config.h minix_config_h HAVE_MINIX_CONFIG_H"
+as_fn_append ac_func_c_list " lstat HAVE_LSTAT"
 as_fn_append ac_func_c_list " canonicalize_file_name HAVE_CANONICALIZE_FILE_NAME"
-as_fn_append ac_func_c_list " faccessat HAVE_FACCESSAT"
 as_fn_append ac_func_c_list " realpath HAVE_REALPATH"
-as_fn_append ac_func_c_list " lstat HAVE_LSTAT"
 as_fn_append ac_header_c_list " sys/param.h sys_param_h HAVE_SYS_PARAM_H"
 as_fn_append ac_func_c_list " _set_invalid_parameter_handler HAVE__SET_INVALID_PARAMETER_HANDLER"
 as_fn_append ac_header_c_list " sys/socket.h sys_socket_h HAVE_SYS_SOCKET_H"
 as_fn_append ac_func_c_list " fchdir HAVE_FCHDIR"
 as_fn_append ac_header_c_list " dirent.h dirent_h HAVE_DIRENT_H"
+as_fn_append ac_header_c_list " error.h error_h HAVE_ERROR_H"
 as_fn_append ac_func_c_list " fcntl HAVE_FCNTL"
 as_fn_append ac_func_c_list " symlink HAVE_SYMLINK"
 as_fn_append ac_func_c_list " fdopendir HAVE_FDOPENDIR"
-as_fn_append ac_func_c_list " mempcpy HAVE_MEMPCPY"
 as_fn_append ac_func_c_list " fstatat HAVE_FSTATAT"
-as_fn_append ac_func_c_list " futimens HAVE_FUTIMENS"
-as_fn_append ac_func_c_list " getdelim HAVE_GETDELIM"
 as_fn_append ac_func_c_list " getdtablesize HAVE_GETDTABLESIZE"
 as_fn_append ac_header_c_list " getopt.h getopt_h HAVE_GETOPT_H"
 as_fn_append ac_header_c_list " sys/cdefs.h sys_cdefs_h HAVE_SYS_CDEFS_H"
-as_fn_append ac_func_c_list " getprogname HAVE_GETPROGNAME"
 as_fn_append ac_func_c_list " getexecname HAVE_GETEXECNAME"
-as_fn_append ac_func_c_list " timespec_get HAVE_TIMESPEC_GET"
 as_fn_append ac_header_c_list " sys/time.h sys_time_h HAVE_SYS_TIME_H"
 as_fn_append ac_func_c_list " gettimeofday HAVE_GETTIMEOFDAY"
 as_fn_append ac_header_c_list " limits.h limits_h HAVE_LIMITS_H"
 as_fn_append ac_header_c_list " math.h math_h HAVE_MATH_H"
+as_fn_append ac_func_c_list " mbsinit HAVE_MBSINIT"
+as_fn_append ac_func_c_list " mbrtowc HAVE_MBRTOWC"
 as_fn_append ac_header_c_list " sys/mman.h sys_mman_h HAVE_SYS_MMAN_H"
 as_fn_append ac_func_c_list " mprotect HAVE_MPROTECT"
 as_fn_append ac_func_c_list " mkdirat HAVE_MKDIRAT"
@@ -4118,17 +4192,12 @@ as_fn_append ac_func_c_list " openat HAVE_OPENAT"
 as_fn_append ac_func_c_list " pipe HAVE_PIPE"
 gl_printf_safe=yes
 as_fn_append ac_func_c_list " readlink HAVE_READLINK"
-as_fn_append ac_func_c_list " readlinkat HAVE_READLINKAT"
 as_fn_append ac_func_c_list " link HAVE_LINK"
 as_fn_append ac_func_c_list " renameat HAVE_RENAMEAT"
-as_fn_append ac_func_c_list " renameat2 HAVE_RENAMEAT2"
-as_fn_append ac_func_c_list " symlinkat HAVE_SYMLINKAT"
+as_fn_append ac_header_c_list " stdbool.h stdbool_h HAVE_STDBOOL_H"
+as_fn_append ac_header_c_list " stdckdint.h stdckdint_h HAVE_STDCKDINT_H"
 as_fn_append ac_func_c_list " unlinkat HAVE_UNLINKAT"
 as_fn_append ac_header_c_list " utime.h utime_h HAVE_UTIME_H"
-as_fn_append ac_func_c_list " futimes HAVE_FUTIMES"
-as_fn_append ac_func_c_list " futimesat HAVE_FUTIMESAT"
-as_fn_append ac_func_c_list " utimensat HAVE_UTIMENSAT"
-as_fn_append ac_func_c_list " lutimes HAVE_LUTIMES"
 as_fn_append ac_func_c_list " vasnprintf HAVE_VASNPRINTF"
 as_fn_append ac_header_c_list " features.h features_h HAVE_FEATURES_H"
 as_fn_append ac_func_c_list " snprintf HAVE_SNPRINTF"
@@ -6453,6 +6522,8 @@ printf "%s\n" "$ac_cv_should_define__xopen_source" >&6; }
 
   printf "%s\n" "#define __STDC_WANT_IEC_60559_DFP_EXT__ 1" >>confdefs.h
 
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_EXT__ 1" >>confdefs.h
+
   printf "%s\n" "#define __STDC_WANT_IEC_60559_FUNCS_EXT__ 1" >>confdefs.h
 
   printf "%s\n" "#define __STDC_WANT_IEC_60559_TYPES_EXT__ 1" >>confdefs.h
@@ -7405,80 +7476,34 @@ if test ${enable_largefile+y}
 then :
   enableval=$enable_largefile;
 fi
-
-if test "$enable_largefile" != no
+if test "$enable_largefile,$enable_year2038" != no,no
 then :
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for special C compiler options needed for large files" >&5
-printf %s "checking for special C compiler options needed for large files... " >&6; }
-if test ${ac_cv_sys_largefile_CC+y}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable large file support" >&5
+printf %s "checking for $CC option to enable large file support... " >&6; }
+if test ${ac_cv_sys_largefile_opts+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
-  ac_cv_sys_largefile_CC=no
-     if test "$GCC" != yes; then
-       ac_save_CC=$CC
-       while :; do
-         # IRIX 6.2 and later do not support large files by default,
-         # so use the C compiler's -n32 option if that helps.
-         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <sys/types.h>
- /* Check that off_t can represent 2**63 - 1 correctly.
-    We can't simply define LARGE_OFF_T to be 9223372036854775807,
-    since some C++ compilers masquerading as C compilers
-    incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
-  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
-		       && LARGE_OFF_T % 2147483647 == 1)
-		      ? 1 : -1];
-int
-main (void)
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-         if ac_fn_c_try_compile "$LINENO"
+  ac_save_CC="$CC"
+  ac_opt_found=no
+  for ac_opt in "none needed" "-D_FILE_OFFSET_BITS=64" "-D_LARGE_FILES=1" "-n32"; do
+    if test x"$ac_opt" != x"none needed"
 then :
-  break
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam
-         CC="$CC -n32"
-         if ac_fn_c_try_compile "$LINENO"
-then :
-  ac_cv_sys_largefile_CC=' -n32'; break
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam
-         break
-       done
-       CC=$ac_save_CC
-       rm -f conftest.$ac_ext
-    fi
+  CC="$ac_save_CC $ac_opt"
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_CC" >&5
-printf "%s\n" "$ac_cv_sys_largefile_CC" >&6; }
-  if test "$ac_cv_sys_largefile_CC" != no; then
-    CC=$CC$ac_cv_sys_largefile_CC
-  fi
-
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for _FILE_OFFSET_BITS value needed for large files" >&5
-printf %s "checking for _FILE_OFFSET_BITS value needed for large files... " >&6; }
-if test ${ac_cv_sys_file_offset_bits+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  while :; do
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
- /* Check that off_t can represent 2**63 - 1 correctly.
-    We can't simply define LARGE_OFF_T to be 9223372036854775807,
+#ifndef FTYPE
+# define FTYPE off_t
+#endif
+ /* Check that FTYPE can represent 2**63 - 1 correctly.
+    We can't simply define LARGE_FTYPE to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
-  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
-		       && LARGE_OFF_T % 2147483647 == 1)
+#define LARGE_FTYPE (((FTYPE) 1 << 31 << 31) - 1 + ((FTYPE) 1 << 31 << 31))
+  int FTYPE_is_large[(LARGE_FTYPE % 2147483629 == 721
+		       && LARGE_FTYPE % 2147483647 == 1)
 		      ? 1 : -1];
 int
 main (void)
@@ -7490,171 +7515,87 @@ main (void)
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
-  ac_cv_sys_file_offset_bits=no; break
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#undef _FILE_OFFSET_BITS
-#define _FILE_OFFSET_BITS 64
-#include <sys/types.h>
- /* Check that off_t can represent 2**63 - 1 correctly.
-    We can't simply define LARGE_OFF_T to be 9223372036854775807,
-    since some C++ compilers masquerading as C compilers
-    incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
-  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
-		       && LARGE_OFF_T % 2147483647 == 1)
-		      ? 1 : -1];
-int
-main (void)
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
+  if test x"$ac_opt" = x"none needed"
 then :
-  ac_cv_sys_file_offset_bits=64; break
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-  ac_cv_sys_file_offset_bits=unknown
-  break
-done
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_file_offset_bits" >&5
-printf "%s\n" "$ac_cv_sys_file_offset_bits" >&6; }
-case $ac_cv_sys_file_offset_bits in #(
-  no | unknown) ;;
-  *)
-printf "%s\n" "#define _FILE_OFFSET_BITS $ac_cv_sys_file_offset_bits" >>confdefs.h
-;;
-esac
-rm -rf conftest*
-  case $ac_cv_sys_file_offset_bits in #(
-  unknown) :
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for _LARGE_FILES value needed for large files" >&5
-printf %s "checking for _LARGE_FILES value needed for large files... " >&6; }
-if test ${ac_cv_sys_large_files+y}
+  # GNU/Linux s390x and alpha need _FILE_OFFSET_BITS=64 for wide ino_t.
+	 CC="$CC -DFTYPE=ino_t"
+	 if ac_fn_c_try_compile "$LINENO"
 then :
-  printf %s "(cached) " >&6
-else $as_nop
-  while :; do
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <sys/types.h>
- /* Check that off_t can represent 2**63 - 1 correctly.
-    We can't simply define LARGE_OFF_T to be 9223372036854775807,
-    since some C++ compilers masquerading as C compilers
-    incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
-  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
-		       && LARGE_OFF_T % 2147483647 == 1)
-		      ? 1 : -1];
-int
-main (void)
-{
 
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
+else $as_nop
+  CC="$CC -D_FILE_OFFSET_BITS=64"
+	    if ac_fn_c_try_compile "$LINENO"
 then :
-  ac_cv_sys_large_files=no; break
+  ac_opt='-D_FILE_OFFSET_BITS=64'
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#undef _LARGE_FILES
-#define _LARGE_FILES 1
-#include <sys/types.h>
- /* Check that off_t can represent 2**63 - 1 correctly.
-    We can't simply define LARGE_OFF_T to be 9223372036854775807,
-    since some C++ compilers masquerading as C compilers
-    incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
-  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
-		       && LARGE_OFF_T % 2147483647 == 1)
-		      ? 1 : -1];
-int
-main (void)
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
-then :
-  ac_cv_sys_large_files=1; break
+rm -f core conftest.err conftest.$ac_objext conftest.beam
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-  ac_cv_sys_large_files=unknown
-  break
-done
+rm -f core conftest.err conftest.$ac_objext conftest.beam
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_large_files" >&5
-printf "%s\n" "$ac_cv_sys_large_files" >&6; }
-case $ac_cv_sys_large_files in #(
-  no | unknown) ;;
-  *)
-printf "%s\n" "#define _LARGE_FILES $ac_cv_sys_large_files" >>confdefs.h
-;;
+      ac_cv_sys_largefile_opts=$ac_opt
+      ac_opt_found=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+    test $ac_opt_found = no || break
+  done
+  CC="$ac_save_CC"
+
+
+    if test $ac_opt_found != yes; then
+      case $host_os in #(
+  mingw* | windows*) :
+    ac_cv_sys_largefile_opts="supported through gnulib"
+           ac_opt_found=yes
+       ;; #(
+  *) :
+     ;;
 esac
-rm -rf conftest* ;; #(
-  64) :
+    fi
 
- # Check whether --enable-year2038 was given.
-if test ${enable_year2038+y}
-then :
-  enableval=$enable_year2038;
+  test $ac_opt_found = yes || ac_cv_sys_largefile_opts="support not detected"
 fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_opts" >&5
+printf "%s\n" "$ac_cv_sys_largefile_opts" >&6; }
 
- if test "$enable_year2038" != no
-then :
+ac_have_largefile=yes
+case $ac_cv_sys_largefile_opts in #(
+  "none needed") :
+     ;; #(
+  "supported through gnulib") :
+     ;; #(
+  "support not detected") :
+    ac_have_largefile=no ;; #(
+  "-D_FILE_OFFSET_BITS=64") :
 
-                            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for time_t past the year 2038" >&5
-printf %s "checking for time_t past the year 2038... " >&6; }
-if test ${gl_cv_type_time_t_y2038+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
+printf "%s\n" "#define _FILE_OFFSET_BITS 64" >>confdefs.h
+ ;; #(
+  "-D_LARGE_FILES=1") :
 
-  #include <time.h>
-  /* Check that time_t can represent 2**32 - 1 correctly.  */
-  #define LARGE_TIME_T \\
-    ((time_t) (((time_t) 1 << 30) - 1 + 3 * ((time_t) 1 << 30)))
-  int verify_time_t_range[(LARGE_TIME_T / 65537 == 65535
-                           && LARGE_TIME_T % 65537 == 0)
-                          ? 1 : -1];
+printf "%s\n" "#define _LARGE_FILES 1" >>confdefs.h
+ ;; #(
+  "-n32") :
+    CC="$CC -n32" ;; #(
+  *) :
+    as_fn_error $? "internal error: bad value for \$ac_cv_sys_largefile_opts" "$LINENO" 5 ;;
+esac
 
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
+if test "$enable_year2038" != no
 then :
-  gl_cv_type_time_t_y2038=yes
-else $as_nop
-  gl_cv_type_time_t_y2038=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_type_time_t_y2038" >&5
-printf "%s\n" "$gl_cv_type_time_t_y2038" >&6; }
-  if test "$gl_cv_type_time_t_y2038" = no; then
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for 64-bit time_t with _TIME_BITS=64" >&5
-printf %s "checking for 64-bit time_t with _TIME_BITS=64... " >&6; }
-if test ${gl_cv_type_time_t_bits_macro+y}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option for timestamps after 2038" >&5
+printf %s "checking for $CC option for timestamps after 2038... " >&6; }
+if test ${ac_cv_sys_year2038_opts+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+  ac_save_CPPFLAGS="$CPPFLAGS"
+  ac_opt_found=no
+  for ac_opt in "none needed" "-D_TIME_BITS=64" "-D__MINGW_USE_VC2005_COMPAT" "-U_USE_32_BIT_TIME_T -D__MINGW_USE_VC2005_COMPAT"; do
+    if test x"$ac_opt" != x"none needed"
+then :
+  CPPFLAGS="$ac_save_CPPFLAGS $ac_opt"
+fi
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#define _TIME_BITS 64
-                           #define _FILE_OFFSET_BITS 64
 
   #include <time.h>
   /* Check that time_t can represent 2**32 - 1 correctly.  */
@@ -7664,83 +7605,56 @@ else $as_nop
                            && LARGE_TIME_T % 65537 == 0)
                           ? 1 : -1];
 
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
-  gl_cv_type_time_t_bits_macro=yes
-else $as_nop
-  gl_cv_type_time_t_bits_macro=no
+  ac_cv_sys_year2038_opts="$ac_opt"
+      ac_opt_found=yes
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
+    test $ac_opt_found = no || break
+  done
+  CPPFLAGS="$ac_save_CPPFLAGS"
+  test $ac_opt_found = yes || ac_cv_sys_year2038_opts="support not detected"
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_type_time_t_bits_macro" >&5
-printf "%s\n" "$gl_cv_type_time_t_bits_macro" >&6; }
-    if test "$gl_cv_type_time_t_bits_macro" = yes; then
-
-printf "%s\n" "#define _TIME_BITS 64" >>confdefs.h
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_year2038_opts" >&5
+printf "%s\n" "$ac_cv_sys_year2038_opts" >&6; }
 
+ac_have_year2038=yes
+case $ac_cv_sys_year2038_opts in #(
+  "none needed") :
+     ;; #(
+  "support not detected") :
+    ac_have_year2038=no ;; #(
+  "-D_TIME_BITS=64") :
 
-printf "%s\n" "#define _FILE_OFFSET_BITS 64" >>confdefs.h
-
-      gl_cv_type_time_t_y2038=yes
-    fi
-  fi
-  if test $gl_cv_type_time_t_y2038 = no; then
-    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#ifdef _USE_32BIT_TIME_T
-             int ok;
-           #else
-             error fail
-           #endif
-
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
-then :
-  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "The 'time_t' type stops working after January 2038.
-          Remove _USE_32BIT_TIME_T from the compiler flags.
-See \`config.log' for more details" "$LINENO" 5; }
-else $as_nop
-  # If not cross-compiling and  says we should check,
-       # and 'touch' works with a large timestamp, then evidently wider time_t
-       # is desired and supported, so fail and ask the builder to fix the
-       # problem.  Otherwise, just warn the builder.
-
-       if test "$gl_warned_about_y2038" != yes; then
-         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: The 'time_t' type stops working after January 2038,
-            and this package needs a wider 'time_t' type
-            if there is any way to access timestamps after that.
-            Configure with 'CC=\"${CC} -m64\"' perhaps?" >&5
-printf "%s\n" "$as_me: WARNING: The 'time_t' type stops working after January 2038,
-            and this package needs a wider 'time_t' type
-            if there is any way to access timestamps after that.
-            Configure with 'CC=\"${CC} -m64\"' perhaps?" >&2;}
-         gl_warned_about_y2038=yes
-       fi
+printf "%s\n" "#define _TIME_BITS 64" >>confdefs.h
+ ;; #(
+  "-D__MINGW_USE_VC2005_COMPAT") :
 
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-  fi
-fi
+printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
  ;; #(
+  "-U_USE_32_BIT_TIME_T"*) :
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "the 'time_t' type is currently forced to be 32-bit. It
+will stop working after mid-January 2038. Remove
+_USE_32BIT_TIME_T from the compiler flags.
+See \`config.log' for more details" "$LINENO" 5; } ;; #(
   *) :
-     ;;
+    as_fn_error $? "internal error: bad value for \$ac_cv_sys_year2038_opts" "$LINENO" 5 ;;
 esac
-fi
-
-
-
-  case "$host_os" in
-    mingw*)
-
-printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
 
-      ;;
-  esac
+fi
 
+fi
 
 
   # Pre-early section.
@@ -7748,7 +7662,9 @@ printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
 
 
   # Code from module absolute-header:
+  # Code from module access:
   # Code from module alloca-opt:
+  # Code from module assert-h:
   # Code from module assure:
   # Code from module at-internal:
   # Code from module attribute:
@@ -7773,6 +7689,7 @@ printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
   # Code from module eloop-threshold:
   # Code from module errno:
   # Code from module error:
+  # Code from module error-h:
   # Code from module euidaccess:
   # Code from module exitfail:
   # Code from module extensions:
@@ -7807,6 +7724,7 @@ printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
   # Code from module gettext-h:
   # Code from module gettime:
   # Code from module gettimeofday:
+  # Code from module glibc-internal/scratch_buffer:
   # Code from module group-member:
   # Code from module ialloc:
   # Code from module idx:
@@ -7819,7 +7737,6 @@ printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
   # Code from module isnanl-nolibm:
   # Code from module largefile:
 
-
   # Code from module libc-config:
   # Code from module limits-h:
   # Code from module lstat:
@@ -7827,6 +7744,7 @@ printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
   # Code from module malloc-posix:
   # Code from module malloca:
   # Code from module math:
+  # Code from module mbszero:
   # Code from module memchr:
   # Code from module mempcpy:
   # Code from module memrchr:
@@ -7860,7 +7778,6 @@ printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
   # Code from module root-uid:
   # Code from module same-inode:
   # Code from module save-cwd:
-  # Code from module scratch_buffer:
   # Code from module signbit:
   # Code from module size_max:
   # Code from module snippet/_Noreturn:
@@ -7871,11 +7788,16 @@ printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
   # Code from module stat:
   # Code from module stat-time:
   # Code from module std-gnu11:
-  # Code from module stdalign:
   # Code from module stdbool:
+  # Code from module stdckdint:
   # Code from module stddef:
   # Code from module stdint:
   # Code from module stdio:
+
+
+  printf "%s\n" "#define __USE_MINGW_ANSI_STDIO 1" >>confdefs.h
+
+
   # Code from module stdlib:
   # Code from module strcase:
   # Code from module strcasestr-simple:
@@ -7891,7 +7813,7 @@ printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
   # Code from module sys_stat:
   # Code from module sys_time:
   # Code from module sys_types:
-  # Code from module time:
+  # Code from module time-h:
   # Code from module timespec:
   # Code from module unistd:
   # Code from module unistd-safer:
@@ -7920,6 +7842,8 @@ printf "%s\n" "#define __MINGW_USE_VC2005_COMPAT 1" >>confdefs.h
 
 
 
+
+
                         # Check whether --enable-cross-guesses was given.
 if test ${enable_cross_guesses+y}
 then :
@@ -7944,6 +7868,461 @@ fi
   export LIBC_FATAL_STDERR_
 
 
+
+    HAVE_CHOWN=1;
+  HAVE_COPY_FILE_RANGE=1;
+  HAVE_DUP3=1;
+  HAVE_EUIDACCESS=1;
+  HAVE_EXECVPE=1;
+  HAVE_FACCESSAT=1;
+  HAVE_FCHDIR=1;
+  HAVE_FCHOWNAT=1;
+  HAVE_FDATASYNC=1;
+  HAVE_FSYNC=1;
+  HAVE_FTRUNCATE=1;
+  HAVE_GETDTABLESIZE=1;
+  HAVE_GETENTROPY=1;
+  HAVE_GETGROUPS=1;
+  HAVE_GETHOSTNAME=1;
+  HAVE_GETLOGIN=1;
+  HAVE_GETPAGESIZE=1;
+  HAVE_GETPASS=1;
+  HAVE_GROUP_MEMBER=1;
+  HAVE_LCHOWN=1;
+  HAVE_LINK=1;
+  HAVE_LINKAT=1;
+  HAVE_PIPE=1;
+  HAVE_PIPE2=1;
+  HAVE_PREAD=1;
+  HAVE_PWRITE=1;
+  HAVE_READLINK=1;
+  HAVE_READLINKAT=1;
+  HAVE_SETHOSTNAME=1;
+  HAVE_SLEEP=1;
+  HAVE_SYMLINK=1;
+  HAVE_SYMLINKAT=1;
+  HAVE_UNLINKAT=1;
+  HAVE_USLEEP=1;
+  HAVE_DECL_ENVIRON=1;
+  HAVE_DECL_EXECVPE=1;
+  HAVE_DECL_FCHDIR=1;
+  HAVE_DECL_FDATASYNC=1;
+  HAVE_DECL_GETDOMAINNAME=1;
+  HAVE_DECL_GETLOGIN=1;
+  HAVE_DECL_GETLOGIN_R=1;
+  HAVE_DECL_GETPAGESIZE=1;
+  HAVE_DECL_GETUSERSHELL=1;
+  HAVE_DECL_SETHOSTNAME=1;
+  HAVE_DECL_TRUNCATE=1;
+  HAVE_DECL_TTYNAME_R=1;
+  HAVE_OS_H=0;
+  HAVE_SYS_PARAM_H=0;
+  REPLACE_ACCESS=0;
+  REPLACE_CHOWN=0;
+  REPLACE_CLOSE=0;
+  REPLACE_COPY_FILE_RANGE=0;
+  REPLACE_DUP=0;
+  REPLACE_DUP2=0;
+  REPLACE_DUP3=0;
+  REPLACE_EXECL=0;
+  REPLACE_EXECLE=0;
+  REPLACE_EXECLP=0;
+  REPLACE_EXECV=0;
+  REPLACE_EXECVE=0;
+  REPLACE_EXECVP=0;
+  REPLACE_EXECVPE=0;
+  REPLACE_FACCESSAT=0;
+  REPLACE_FCHDIR=0;
+  REPLACE_FCHOWNAT=0;
+  REPLACE_FDATASYNC=0;
+  REPLACE_FTRUNCATE=0;
+  REPLACE_GETCWD=0;
+  REPLACE_GETDOMAINNAME=0;
+  REPLACE_GETDTABLESIZE=0;
+  REPLACE_GETENTROPY=0;
+  REPLACE_GETLOGIN_R=0;
+  REPLACE_GETGROUPS=0;
+  REPLACE_GETPAGESIZE=0;
+  REPLACE_GETPASS=0;
+  REPLACE_GETPASS_FOR_GETPASS_GNU=0;
+  REPLACE_ISATTY=0;
+  REPLACE_LCHOWN=0;
+  REPLACE_LINK=0;
+  REPLACE_LINKAT=0;
+  REPLACE_LSEEK=0;
+  REPLACE_PIPE2=0;
+  REPLACE_PREAD=0;
+  REPLACE_PWRITE=0;
+  REPLACE_READ=0;
+  REPLACE_READLINK=0;
+  REPLACE_READLINKAT=0;
+  REPLACE_RMDIR=0;
+  REPLACE_SETHOSTNAME=0;
+  REPLACE_SLEEP=0;
+  REPLACE_SYMLINK=0;
+  REPLACE_SYMLINKAT=0;
+  REPLACE_TRUNCATE=0;
+  REPLACE_TTYNAME_R=0;
+  REPLACE_UNLINK=0;
+  REPLACE_UNLINKAT=0;
+  REPLACE_USLEEP=0;
+  REPLACE_WRITE=0;
+  UNISTD_H_HAVE_SYS_RANDOM_H=0;
+  UNISTD_H_HAVE_WINSOCK2_H=0;
+  UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
+
+
+ac_func=
+for ac_item in $ac_func_c_list
+do
+  if test $ac_func; then
+    ac_fn_c_check_func "$LINENO" $ac_func ac_cv_func_$ac_func
+    if eval test \"x\$ac_cv_func_$ac_func\" = xyes; then
+      echo "#define $ac_item 1" >> confdefs.h
+    fi
+    ac_func=
+  else
+    ac_func=$ac_item
+  fi
+done
+
+
+  GL_GNULIB_ACCESS=0
+
+
+
+  GL_GNULIB_CHDIR=0
+
+
+
+  GL_GNULIB_CHOWN=0
+
+
+
+  GL_GNULIB_CLOSE=0
+
+
+
+  GL_GNULIB_COPY_FILE_RANGE=0
+
+
+
+  GL_GNULIB_DUP=0
+
+
+
+  GL_GNULIB_DUP2=0
+
+
+
+  GL_GNULIB_DUP3=0
+
+
+
+  GL_GNULIB_ENVIRON=0
+
+
+
+  GL_GNULIB_EUIDACCESS=0
+
+
+
+  GL_GNULIB_EXECL=0
+
+
+
+  GL_GNULIB_EXECLE=0
+
+
+
+  GL_GNULIB_EXECLP=0
+
+
+
+  GL_GNULIB_EXECV=0
+
+
+
+  GL_GNULIB_EXECVE=0
+
+
+
+  GL_GNULIB_EXECVP=0
+
+
+
+  GL_GNULIB_EXECVPE=0
+
+
+
+  GL_GNULIB_FACCESSAT=0
+
+
+
+  GL_GNULIB_FCHDIR=0
+
+
+
+  GL_GNULIB_FCHOWNAT=0
+
+
+
+  GL_GNULIB_FDATASYNC=0
+
+
+
+  GL_GNULIB_FSYNC=0
+
+
+
+  GL_GNULIB_FTRUNCATE=0
+
+
+
+  GL_GNULIB_GETCWD=0
+
+
+
+  GL_GNULIB_GETDOMAINNAME=0
+
+
+
+  GL_GNULIB_GETDTABLESIZE=0
+
+
+
+  GL_GNULIB_GETENTROPY=0
+
+
+
+  GL_GNULIB_GETGROUPS=0
+
+
+
+  GL_GNULIB_GETHOSTNAME=0
+
+
+
+  GL_GNULIB_GETLOGIN=0
+
+
+
+  GL_GNULIB_GETLOGIN_R=0
+
+
+
+  GL_GNULIB_GETOPT_POSIX=0
+
+
+
+  GL_GNULIB_GETPAGESIZE=0
+
+
+
+  GL_GNULIB_GETPASS=0
+
+
+
+  GL_GNULIB_GETPASS_GNU=0
+
+
+
+  GL_GNULIB_GETUSERSHELL=0
+
+
+
+  GL_GNULIB_GROUP_MEMBER=0
+
+
+
+  GL_GNULIB_ISATTY=0
+
+
+
+  GL_GNULIB_LCHOWN=0
+
+
+
+  GL_GNULIB_LINK=0
+
+
+
+  GL_GNULIB_LINKAT=0
+
+
+
+  GL_GNULIB_LSEEK=0
+
+
+
+  GL_GNULIB_PIPE=0
+
+
+
+  GL_GNULIB_PIPE2=0
+
+
+
+  GL_GNULIB_PREAD=0
+
+
+
+  GL_GNULIB_PWRITE=0
+
+
+
+  GL_GNULIB_READ=0
+
+
+
+  GL_GNULIB_READLINK=0
+
+
+
+  GL_GNULIB_READLINKAT=0
+
+
+
+  GL_GNULIB_RMDIR=0
+
+
+
+  GL_GNULIB_SETHOSTNAME=0
+
+
+
+  GL_GNULIB_SLEEP=0
+
+
+
+  GL_GNULIB_SYMLINK=0
+
+
+
+  GL_GNULIB_SYMLINKAT=0
+
+
+
+  GL_GNULIB_TRUNCATE=0
+
+
+
+  GL_GNULIB_TTYNAME_R=0
+
+
+
+  GL_GNULIB_UNISTD_H_GETOPT=0
+
+
+
+  GL_GNULIB_UNISTD_H_NONBLOCKING=0
+
+
+
+  GL_GNULIB_UNISTD_H_SIGPIPE=0
+
+
+
+  GL_GNULIB_UNLINK=0
+
+
+
+  GL_GNULIB_UNLINKAT=0
+
+
+
+  GL_GNULIB_USLEEP=0
+
+
+
+  GL_GNULIB_WRITE=0
+
+
+
+  GL_GNULIB_MDA_ACCESS=1
+
+
+
+  GL_GNULIB_MDA_CHDIR=1
+
+
+
+  GL_GNULIB_MDA_CLOSE=1
+
+
+
+  GL_GNULIB_MDA_DUP=1
+
+
+
+  GL_GNULIB_MDA_DUP2=1
+
+
+
+  GL_GNULIB_MDA_EXECL=1
+
+
+
+  GL_GNULIB_MDA_EXECLE=1
+
+
+
+  GL_GNULIB_MDA_EXECLP=1
+
+
+
+  GL_GNULIB_MDA_EXECV=1
+
+
+
+  GL_GNULIB_MDA_EXECVE=1
+
+
+
+  GL_GNULIB_MDA_EXECVP=1
+
+
+
+  GL_GNULIB_MDA_EXECVPE=1
+
+
+
+  GL_GNULIB_MDA_GETCWD=1
+
+
+
+  GL_GNULIB_MDA_GETPID=1
+
+
+
+  GL_GNULIB_MDA_ISATTY=1
+
+
+
+  GL_GNULIB_MDA_LSEEK=1
+
+
+
+  GL_GNULIB_MDA_READ=1
+
+
+
+  GL_GNULIB_MDA_RMDIR=1
+
+
+
+  GL_GNULIB_MDA_SWAB=1
+
+
+
+  GL_GNULIB_MDA_UNLINK=1
+
+
+
+  GL_GNULIB_MDA_WRITE=1
+
+
+
 ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
 if test "x$ac_cv_type_size_t" = xyes
 then :
@@ -8108,6 +8487,126 @@ printf "%s\n" "#define STACK_DIRECTION $ac_cv_c_stack_direction" >>confdefs.h
 fi
 
 
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the preprocessor supports include_next" >&5
+printf %s "checking whether the preprocessor supports include_next... " >&6; }
+if test ${gl_cv_have_include_next+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  rm -rf conftestd1a conftestd1b conftestd2
+     mkdir conftestd1a conftestd1b conftestd2
+                                                  cat <<EOF > conftestd1a/conftest.h
+#define DEFINED_IN_CONFTESTD1
+#include_next <conftest.h>
+#ifdef DEFINED_IN_CONFTESTD2
+int foo;
+#else
+#error "include_next doesn't work"
+#endif
+EOF
+     cat <<EOF > conftestd1b/conftest.h
+#define DEFINED_IN_CONFTESTD1
+#include <stdio.h>
+#include_next <conftest.h>
+#ifdef DEFINED_IN_CONFTESTD2
+int foo;
+#else
+#error "include_next doesn't work"
+#endif
+EOF
+     cat <<EOF > conftestd2/conftest.h
+#ifndef DEFINED_IN_CONFTESTD1
+#error "include_next test doesn't work"
+#endif
+#define DEFINED_IN_CONFTESTD2
+EOF
+     gl_save_CPPFLAGS="$CPPFLAGS"
+     CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1b -Iconftestd2"
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <conftest.h>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_have_include_next=yes
+else $as_nop
+  CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1a -Iconftestd2"
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <conftest.h>
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_have_include_next=buggy
+else $as_nop
+  gl_cv_have_include_next=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+     CPPFLAGS="$gl_save_CPPFLAGS"
+     rm -rf conftestd1a conftestd1b conftestd2
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_include_next" >&5
+printf "%s\n" "$gl_cv_have_include_next" >&6; }
+  PRAGMA_SYSTEM_HEADER=
+  if test $gl_cv_have_include_next = yes; then
+    INCLUDE_NEXT=include_next
+    INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
+    if test -n "$GCC"; then
+      PRAGMA_SYSTEM_HEADER='#pragma GCC system_header'
+    fi
+  else
+    if test $gl_cv_have_include_next = buggy; then
+      INCLUDE_NEXT=include
+      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
+    else
+      INCLUDE_NEXT=include
+      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include
+    fi
+  fi
+
+
+
+
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether source code line length is unlimited" >&5
+printf %s "checking whether source code line length is unlimited... " >&6; }
+if test ${gl_cv_source_line_length_unlimited+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef __TANDEM
+choke me
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "choke me" >/dev/null 2>&1
+then :
+  gl_cv_source_line_length_unlimited=no
+else $as_nop
+  gl_cv_source_line_length_unlimited=yes
+fi
+rm -rf conftest*
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_source_line_length_unlimited" >&5
+printf "%s\n" "$gl_cv_source_line_length_unlimited" >&6; }
+  if test $gl_cv_source_line_length_unlimited = no; then
+    PRAGMA_COLUMNS="#pragma COLUMNS 10000"
+  else
+    PRAGMA_COLUMNS=
+  fi
+
+
+
     HAVE__EXIT=1;
   HAVE_ALIGNED_ALLOC=1;
   HAVE_ATOLL=1;
@@ -8116,6 +8615,8 @@ fi
   HAVE_DECL_FCVT=1;
   HAVE_DECL_GCVT=1;
   HAVE_DECL_GETLOADAVG=1;
+  HAVE_DECL_PROGRAM_INVOCATION_NAME=1;
+  HAVE_GETPROGNAME=1;
   HAVE_GETSUBOPT=1;
   HAVE_GRANTPT=1;
   HAVE_INITSTATE=1;
@@ -8152,21 +8653,31 @@ fi
   HAVE_SYS_LOADAVG_H=0;
   HAVE_UNLOCKPT=1;
   HAVE_DECL_UNSETENV=1;
+  REPLACE__EXIT=0;
   REPLACE_ALIGNED_ALLOC=0;
   REPLACE_CALLOC_FOR_CALLOC_GNU=0;
   REPLACE_CALLOC_FOR_CALLOC_POSIX=0;
   REPLACE_CANONICALIZE_FILE_NAME=0;
   REPLACE_FREE=0;
+  REPLACE_GETLOADAVG=0;
+  REPLACE_GETPROGNAME=0;
+  REPLACE_GETSUBOPT=0;
   REPLACE_INITSTATE=0;
   REPLACE_MALLOC_FOR_MALLOC_GNU=0;
   REPLACE_MALLOC_FOR_MALLOC_POSIX=0;
+  REPLACE_MB_CUR_MAX=0;
+  REPLACE_MBSTOWCS=0;
   REPLACE_MBTOWC=0;
+  REPLACE_MKOSTEMP=0;
+  REPLACE_MKOSTEMPS=0;
   REPLACE_MKSTEMP=0;
   REPLACE_POSIX_MEMALIGN=0;
+  REPLACE_POSIX_OPENPT=0;
   REPLACE_PTSNAME=0;
   REPLACE_PTSNAME_R=0;
   REPLACE_PUTENV=0;
   REPLACE_QSORT_R=0;
+  REPLACE_RAND=0;
   REPLACE_RANDOM=0;
   REPLACE_RANDOM_R=0;
   REPLACE_REALLOC_FOR_REALLOC_GNU=0;
@@ -8249,7 +8760,7 @@ then :
 else $as_nop
 
                                     case "$host_os" in
-        mingw*)
+        mingw* | windows*)
           gl_cv_func_malloc_posix=no ;;
         irix* | solaris*)
 
@@ -8315,6 +8826,10 @@ printf "%s\n" "#define HAVE_MALLOC_POSIX 1" >>confdefs.h
 
 
 
+  GL_GNULIB_GETPROGNAME=0
+
+
+
   GL_GNULIB_GETSUBOPT=0
 
 
@@ -8331,6 +8846,10 @@ printf "%s\n" "#define HAVE_MALLOC_POSIX 1" >>confdefs.h
 
 
 
+  GL_GNULIB_MBSTOWCS=0
+
+
+
   GL_GNULIB_MBTOWC=0
 
 
@@ -8379,6 +8898,10 @@ printf "%s\n" "#define HAVE_MALLOC_POSIX 1" >>confdefs.h
 
 
 
+  GL_GNULIB_RAND=0
+
+
+
   GL_GNULIB_RANDOM=0
 
 
@@ -8490,10 +9013,13 @@ then :
           linux-* | linux)
             # Guess yes on Linux systems.
             gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;;
+          midipix*)
+            # Guess yes on systems that emulate the Linux system calls.
+            gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;;
           *-gnu* | gnu*)
             # Guess yes on glibc systems.
             gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;;
-          mingw*)
+          mingw* | windows*)
             # Guess no on native Windows.
             gl_cv_func_lstat_dereferences_slashed_symlink="guessing no" ;;
           *)
@@ -8543,19 +9069,86 @@ printf "%s\n" "#define LSTAT_FOLLOWS_SLASHED_SYMLINK 1" >>confdefs.h
       ;;
   esac
 
-ac_func=
-for ac_item in $ac_func_c_list
-do
-  if test $ac_func; then
-    ac_fn_c_check_func "$LINENO" $ac_func ac_cv_func_$ac_func
-    if eval test \"x\$ac_cv_func_$ac_func\" = xyes; then
-      echo "#define $ac_item 1" >> confdefs.h
-    fi
-    ac_func=
-  else
-    ac_func=$ac_item
-  fi
-done
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC options needed to detect all undeclared functions" >&5
+printf %s "checking for $CC options needed to detect all undeclared functions... " >&6; }
+if test ${ac_cv_c_undeclared_builtin_options+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_save_CFLAGS=$CFLAGS
+   ac_cv_c_undeclared_builtin_options='cannot detect'
+   for ac_arg in '' -fno-builtin; do
+     CFLAGS="$ac_save_CFLAGS $ac_arg"
+     # This test program should *not* compile successfully.
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+(void) strchr;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+else $as_nop
+  # This test program should compile successfully.
+        # No library function is consistently available on
+        # freestanding implementations, so test against a dummy
+        # declaration.  Include always-available headers on the
+        # off chance that they somehow elicit warnings.
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <float.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stddef.h>
+extern void ac_decl (int, char *);
+
+int
+main (void)
+{
+(void) ac_decl (0, (char *) 0);
+  (void) ac_decl;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  if test x"$ac_arg" = x
+then :
+  ac_cv_c_undeclared_builtin_options='none needed'
+else $as_nop
+  ac_cv_c_undeclared_builtin_options=$ac_arg
+fi
+          break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+    done
+    CFLAGS=$ac_save_CFLAGS
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_undeclared_builtin_options" >&5
+printf "%s\n" "$ac_cv_c_undeclared_builtin_options" >&6; }
+  case $ac_cv_c_undeclared_builtin_options in #(
+  'cannot detect') :
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot make $CC report undeclared builtins
+See \`config.log' for more details" "$LINENO" 5; } ;; #(
+  'none needed') :
+    ac_c_undeclared_builtin_options='' ;; #(
+  *) :
+    ac_c_undeclared_builtin_options=$ac_cv_c_undeclared_builtin_options ;;
+esac
 
 
 
@@ -8600,7 +9193,6 @@ printf "%s\n" "#define DOUBLE_SLASH_IS_DISTINCT_ROOT 1" >>confdefs.h
 
 
 
-
      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether realpath works" >&5
 printf %s "checking whether realpath works... " >&6; }
 if test ${gl_cv_func_realpath_works+y}
@@ -8618,16 +9210,16 @@ else $as_nop
     if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                       # Guess yes on glibc systems.
-        *-gnu* | gnu*) gl_cv_func_realpath_works="guessing yes" ;;
-                       # Guess 'nearly' on musl systems.
-        *-musl*)       gl_cv_func_realpath_works="guessing nearly" ;;
-                       # Guess no on Cygwin.
-        cygwin*)       gl_cv_func_realpath_works="guessing no" ;;
-                       # Guess no on native Windows.
-        mingw*)        gl_cv_func_realpath_works="guessing no" ;;
-                       # If we don't know, obey --enable-cross-guesses.
-        *)             gl_cv_func_realpath_works="$gl_cross_guess_normal" ;;
+                           # Guess yes on glibc systems.
+        *-gnu* | gnu*)     gl_cv_func_realpath_works="guessing yes" ;;
+                           # Guess 'nearly' on musl systems.
+        *-musl*)           gl_cv_func_realpath_works="guessing nearly" ;;
+                           # Guess no on Cygwin.
+        cygwin*)           gl_cv_func_realpath_works="guessing no" ;;
+                           # Guess no on native Windows.
+        mingw* | windows*) gl_cv_func_realpath_works="guessing no" ;;
+                           # If we don't know, obey --enable-cross-guesses.
+        *)                 gl_cv_func_realpath_works="$gl_cross_guess_normal" ;;
       esac
 
 else $as_nop
@@ -8854,473 +9446,155 @@ printf "%s\n" "#define FUNC_REALPATH_NEARLY_WORKS 1" >>confdefs.h
 
 
 
-  case "$host_os" in
-    mingw*) ;;
-    *)      ac_fn_c_check_func "$LINENO" "getcwd" "ac_cv_func_getcwd"
-if test "x$ac_cv_func_getcwd" = xyes
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for faccessat" >&5
+printf %s "checking for faccessat... " >&6; }
+if test ${gl_cv_onwards_func_faccessat+y}
 then :
-  printf "%s\n" "#define HAVE_GETCWD 1" >>confdefs.h
-
-fi
- ;;
-  esac
-
-
-
-
-
-
-
-  GL_GNULIB_ACCESS=0
-
-
-
-  GL_GNULIB_CHDIR=0
-
-
-
-  GL_GNULIB_CHOWN=0
-
-
-
-  GL_GNULIB_CLOSE=0
-
-
-
-  GL_GNULIB_COPY_FILE_RANGE=0
-
-
-
-  GL_GNULIB_DUP=0
-
-
-
-  GL_GNULIB_DUP2=0
-
-
-
-  GL_GNULIB_DUP3=0
-
-
-
-  GL_GNULIB_ENVIRON=0
-
-
-
-  GL_GNULIB_EUIDACCESS=0
-
-
-
-  GL_GNULIB_EXECL=0
-
-
-
-  GL_GNULIB_EXECLE=0
-
-
-
-  GL_GNULIB_EXECLP=0
-
-
-
-  GL_GNULIB_EXECV=0
-
-
-
-  GL_GNULIB_EXECVE=0
-
-
-
-  GL_GNULIB_EXECVP=0
-
-
-
-  GL_GNULIB_EXECVPE=0
-
-
-
-  GL_GNULIB_FACCESSAT=0
-
-
-
-  GL_GNULIB_FCHDIR=0
-
-
-
-  GL_GNULIB_FCHOWNAT=0
-
-
-
-  GL_GNULIB_FDATASYNC=0
-
-
-
-  GL_GNULIB_FSYNC=0
-
-
-
-  GL_GNULIB_FTRUNCATE=0
-
-
-
-  GL_GNULIB_GETCWD=0
-
-
-
-  GL_GNULIB_GETDOMAINNAME=0
-
-
-
-  GL_GNULIB_GETDTABLESIZE=0
-
-
-
-  GL_GNULIB_GETENTROPY=0
-
-
-
-  GL_GNULIB_GETGROUPS=0
-
-
-
-  GL_GNULIB_GETHOSTNAME=0
-
-
-
-  GL_GNULIB_GETLOGIN=0
-
-
-
-  GL_GNULIB_GETLOGIN_R=0
-
-
-
-  GL_GNULIB_GETOPT_POSIX=0
-
-
-
-  GL_GNULIB_GETPAGESIZE=0
-
-
-
-  GL_GNULIB_GETPASS=0
-
-
-
-  GL_GNULIB_GETPASS_GNU=0
-
-
-
-  GL_GNULIB_GETUSERSHELL=0
-
-
-
-  GL_GNULIB_GROUP_MEMBER=0
-
-
-
-  GL_GNULIB_ISATTY=0
-
-
-
-  GL_GNULIB_LCHOWN=0
-
-
-
-  GL_GNULIB_LINK=0
-
-
-
-  GL_GNULIB_LINKAT=0
-
-
-
-  GL_GNULIB_LSEEK=0
-
-
-
-  GL_GNULIB_PIPE=0
-
-
-
-  GL_GNULIB_PIPE2=0
-
-
-
-  GL_GNULIB_PREAD=0
-
-
-
-  GL_GNULIB_PWRITE=0
-
-
-
-  GL_GNULIB_READ=0
-
-
-
-  GL_GNULIB_READLINK=0
-
-
-
-  GL_GNULIB_READLINKAT=0
-
-
-
-  GL_GNULIB_RMDIR=0
-
-
-
-  GL_GNULIB_SETHOSTNAME=0
-
-
-
-  GL_GNULIB_SLEEP=0
-
-
-
-  GL_GNULIB_SYMLINK=0
-
-
-
-  GL_GNULIB_SYMLINKAT=0
-
-
-
-  GL_GNULIB_TRUNCATE=0
-
-
-
-  GL_GNULIB_TTYNAME_R=0
-
-
-
-  GL_GNULIB_UNISTD_H_GETOPT=0
-
-
-
-  GL_GNULIB_UNISTD_H_NONBLOCKING=0
-
-
-
-  GL_GNULIB_UNISTD_H_SIGPIPE=0
-
-
-
-  GL_GNULIB_UNLINK=0
-
-
-
-  GL_GNULIB_UNLINKAT=0
-
-
-
-  GL_GNULIB_USLEEP=0
-
-
-
-  GL_GNULIB_WRITE=0
-
-
-
-  GL_GNULIB_MDA_ACCESS=1
-
-
-
-  GL_GNULIB_MDA_CHDIR=1
-
-
-
-  GL_GNULIB_MDA_CLOSE=1
-
-
-
-  GL_GNULIB_MDA_DUP=1
-
-
-
-  GL_GNULIB_MDA_DUP2=1
-
-
-
-  GL_GNULIB_MDA_EXECL=1
+  printf %s "(cached) " >&6
+else $as_nop
 
+  exec 9>&6 6>/dev/null
 
+       case "$host_os" in
 
-  GL_GNULIB_MDA_EXECLE=1
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "faccessat" "ac_cv_have_decl_faccessat" "#include <unistd.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_faccessat" = xyes
+then :
 
+fi
+           if test $ac_cv_have_decl_faccessat = yes; then
+             ac_fn_c_check_func "$LINENO" "faccessat" "ac_cv_func_faccessat"
+if test "x$ac_cv_func_faccessat" = xyes
+then :
 
+fi
 
-  GL_GNULIB_MDA_EXECLP=1
+             if test $ac_cv_func_faccessat = yes; then
+               gl_cv_onwards_func_faccessat=yes
+             else
+                                                            gl_cv_onwards_func_faccessat='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_faccessat='future OS version'
+           fi
+           ;;
 
 
+         *)
+           ac_fn_c_check_func "$LINENO" "faccessat" "ac_cv_func_faccessat"
+if test "x$ac_cv_func_faccessat" = xyes
+then :
 
-  GL_GNULIB_MDA_EXECV=1
+fi
 
+           gl_cv_onwards_func_faccessat=$ac_cv_func_faccessat
+           ;;
 
+       esac
 
-  GL_GNULIB_MDA_EXECVE=1
+  exec 6>&9 9>&-
 
 
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_faccessat" >&5
+printf "%s\n" "$gl_cv_onwards_func_faccessat" >&6; }
 
-  GL_GNULIB_MDA_EXECVP=1
+  case "$gl_cv_onwards_func_faccessat" in
+    future*) ac_cv_func_faccessat=no ;;
+    *)       ac_cv_func_faccessat=$gl_cv_onwards_func_faccessat ;;
+  esac
+  if test $ac_cv_func_faccessat = yes; then
 
+printf "%s\n" "#define HAVE_FACCESSAT 1" >>confdefs.h
 
+  fi
 
-  GL_GNULIB_MDA_EXECVPE=1
 
 
 
-  GL_GNULIB_MDA_GETCWD=1
+  case "$host_os" in
+    mingw* | windows*) ;;
+    *) ac_fn_c_check_func "$LINENO" "getcwd" "ac_cv_func_getcwd"
+if test "x$ac_cv_func_getcwd" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETCWD 1" >>confdefs.h
 
+fi
+ ;;
+  esac
 
 
-  GL_GNULIB_MDA_GETPID=1
 
 
 
-  GL_GNULIB_MDA_ISATTY=1
 
 
 
-  GL_GNULIB_MDA_LSEEK=1
 
 
 
-  GL_GNULIB_MDA_READ=1
+  if test $ac_cv_func__set_invalid_parameter_handler = yes; then
+    HAVE_MSVC_INVALID_PARAMETER_HANDLER=1
 
+printf "%s\n" "#define HAVE_MSVC_INVALID_PARAMETER_HANDLER 1" >>confdefs.h
 
+  else
+    HAVE_MSVC_INVALID_PARAMETER_HANDLER=0
+  fi
 
-  GL_GNULIB_MDA_RMDIR=1
 
 
 
-  GL_GNULIB_MDA_SWAB=1
 
 
 
-  GL_GNULIB_MDA_UNLINK=1
 
+    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+      REPLACE_CLOSE=1
+    fi
 
 
-  GL_GNULIB_MDA_WRITE=1
 
 
 
 
-    HAVE_CHOWN=1;
-  HAVE_COPY_FILE_RANGE=1;
-  HAVE_DUP3=1;
-  HAVE_EUIDACCESS=1;
-  HAVE_EXECVPE=1;
-  HAVE_FACCESSAT=1;
-  HAVE_FCHDIR=1;
-  HAVE_FCHOWNAT=1;
-  HAVE_FDATASYNC=1;
-  HAVE_FSYNC=1;
-  HAVE_FTRUNCATE=1;
-  HAVE_GETDTABLESIZE=1;
-  HAVE_GETENTROPY=1;
-  HAVE_GETGROUPS=1;
-  HAVE_GETHOSTNAME=1;
-  HAVE_GETLOGIN=1;
-  HAVE_GETPAGESIZE=1;
-  HAVE_GETPASS=1;
-  HAVE_GROUP_MEMBER=1;
-  HAVE_LCHOWN=1;
-  HAVE_LINK=1;
-  HAVE_LINKAT=1;
-  HAVE_PIPE=1;
-  HAVE_PIPE2=1;
-  HAVE_PREAD=1;
-  HAVE_PWRITE=1;
-  HAVE_READLINK=1;
-  HAVE_READLINKAT=1;
-  HAVE_SETHOSTNAME=1;
-  HAVE_SLEEP=1;
-  HAVE_SYMLINK=1;
-  HAVE_SYMLINKAT=1;
-  HAVE_UNLINKAT=1;
-  HAVE_USLEEP=1;
-  HAVE_DECL_ENVIRON=1;
-  HAVE_DECL_EXECVPE=1;
-  HAVE_DECL_FCHDIR=1;
-  HAVE_DECL_FDATASYNC=1;
-  HAVE_DECL_GETDOMAINNAME=1;
-  HAVE_DECL_GETLOGIN=1;
-  HAVE_DECL_GETLOGIN_R=1;
-  HAVE_DECL_GETPAGESIZE=1;
-  HAVE_DECL_GETUSERSHELL=1;
-  HAVE_DECL_SETHOSTNAME=1;
-  HAVE_DECL_TRUNCATE=1;
-  HAVE_DECL_TTYNAME_R=1;
-  HAVE_OS_H=0;
-  HAVE_SYS_PARAM_H=0;
-  REPLACE_ACCESS=0;
-  REPLACE_CHOWN=0;
-  REPLACE_CLOSE=0;
-  REPLACE_COPY_FILE_RANGE=0;
-  REPLACE_DUP=0;
-  REPLACE_DUP2=0;
-  REPLACE_EXECL=0;
-  REPLACE_EXECLE=0;
-  REPLACE_EXECLP=0;
-  REPLACE_EXECV=0;
-  REPLACE_EXECVE=0;
-  REPLACE_EXECVP=0;
-  REPLACE_EXECVPE=0;
-  REPLACE_FACCESSAT=0;
-  REPLACE_FCHOWNAT=0;
-  REPLACE_FTRUNCATE=0;
-  REPLACE_GETCWD=0;
-  REPLACE_GETDOMAINNAME=0;
-  REPLACE_GETDTABLESIZE=0;
-  REPLACE_GETLOGIN_R=0;
-  REPLACE_GETGROUPS=0;
-  REPLACE_GETPAGESIZE=0;
-  REPLACE_GETPASS=0;
-  REPLACE_GETPASS_FOR_GETPASS_GNU=0;
-  REPLACE_ISATTY=0;
-  REPLACE_LCHOWN=0;
-  REPLACE_LINK=0;
-  REPLACE_LINKAT=0;
-  REPLACE_LSEEK=0;
-  REPLACE_PREAD=0;
-  REPLACE_PWRITE=0;
-  REPLACE_READ=0;
-  REPLACE_READLINK=0;
-  REPLACE_READLINKAT=0;
-  REPLACE_RMDIR=0;
-  REPLACE_SLEEP=0;
-  REPLACE_SYMLINK=0;
-  REPLACE_SYMLINKAT=0;
-  REPLACE_TRUNCATE=0;
-  REPLACE_TTYNAME_R=0;
-  REPLACE_UNLINK=0;
-  REPLACE_UNLINKAT=0;
-  REPLACE_USLEEP=0;
-  REPLACE_WRITE=0;
-  UNISTD_H_HAVE_SYS_RANDOM_H=0;
-  UNISTD_H_HAVE_WINSOCK2_H=0;
-  UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
-
+  if test $ac_cv_header_sys_socket_h != yes; then
+                    ac_fn_c_check_header_compile "$LINENO" "winsock2.h" "ac_cv_header_winsock2_h" "$ac_includes_default"
+if test "x$ac_cv_header_winsock2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WINSOCK2_H 1" >>confdefs.h
 
+fi
 
+  fi
+  if test "$ac_cv_header_winsock2_h" = yes; then
+    HAVE_WINSOCK2_H=1
+    UNISTD_H_HAVE_WINSOCK2_H=1
+    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
+  else
+    HAVE_WINSOCK2_H=0
+  fi
 
 
+    if test $UNISTD_H_HAVE_WINSOCK2_H = 1; then
+                        REPLACE_CLOSE=1
+    fi
 
 
+    if test $REPLACE_CLOSE = 0; then
 
-  if test $ac_cv_func__set_invalid_parameter_handler = yes; then
-    HAVE_MSVC_INVALID_PARAMETER_HANDLER=1
 
-printf "%s\n" "#define HAVE_MSVC_INVALID_PARAMETER_HANDLER 1" >>confdefs.h
 
-  else
-    HAVE_MSVC_INVALID_PARAMETER_HANDLER=0
+  if test $ac_cv_func_fchdir = no; then
+    HAVE_FCHDIR=0
   fi
 
-
+      if test $HAVE_FCHDIR = 0; then
+        REPLACE_CLOSE=1
+      fi
+    fi
 
 
 
@@ -9334,12 +9608,22 @@ printf "%s\n" "#define HAVE_MSVC_INVALID_PARAMETER_HANDLER 1" >>confdefs.h
   HAVE_SCANDIR=1;
   HAVE_ALPHASORT=1;
   REPLACE_OPENDIR=0;
+  REPLACE_READDIR=0;
+  REPLACE_REWINDDIR=0;
   REPLACE_CLOSEDIR=0;
   REPLACE_DIRFD=0;
   REPLACE_FDOPENDIR=0;
 
 
 
+  case "$host_os" in
+    mingw* | windows* | os2*) DIR_HAS_FD_MEMBER=0 ;;
+    *)                        DIR_HAS_FD_MEMBER=1 ;;
+  esac
+
+
+
+
 
 
 
@@ -9378,126 +9662,6 @@ printf "%s\n" "#define HAVE_MSVC_INVALID_PARAMETER_HANDLER 1" >>confdefs.h
 
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the preprocessor supports include_next" >&5
-printf %s "checking whether the preprocessor supports include_next... " >&6; }
-if test ${gl_cv_have_include_next+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  rm -rf conftestd1a conftestd1b conftestd2
-     mkdir conftestd1a conftestd1b conftestd2
-                                                  cat <<EOF > conftestd1a/conftest.h
-#define DEFINED_IN_CONFTESTD1
-#include_next <conftest.h>
-#ifdef DEFINED_IN_CONFTESTD2
-int foo;
-#else
-#error "include_next doesn't work"
-#endif
-EOF
-     cat <<EOF > conftestd1b/conftest.h
-#define DEFINED_IN_CONFTESTD1
-#include <stdio.h>
-#include_next <conftest.h>
-#ifdef DEFINED_IN_CONFTESTD2
-int foo;
-#else
-#error "include_next doesn't work"
-#endif
-EOF
-     cat <<EOF > conftestd2/conftest.h
-#ifndef DEFINED_IN_CONFTESTD1
-#error "include_next test doesn't work"
-#endif
-#define DEFINED_IN_CONFTESTD2
-EOF
-     gl_save_CPPFLAGS="$CPPFLAGS"
-     CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1b -Iconftestd2"
-     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <conftest.h>
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
-then :
-  gl_cv_have_include_next=yes
-else $as_nop
-  CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1a -Iconftestd2"
-        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <conftest.h>
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
-then :
-  gl_cv_have_include_next=buggy
-else $as_nop
-  gl_cv_have_include_next=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-     CPPFLAGS="$gl_save_CPPFLAGS"
-     rm -rf conftestd1a conftestd1b conftestd2
-
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_have_include_next" >&5
-printf "%s\n" "$gl_cv_have_include_next" >&6; }
-  PRAGMA_SYSTEM_HEADER=
-  if test $gl_cv_have_include_next = yes; then
-    INCLUDE_NEXT=include_next
-    INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
-    if test -n "$GCC"; then
-      PRAGMA_SYSTEM_HEADER='#pragma GCC system_header'
-    fi
-  else
-    if test $gl_cv_have_include_next = buggy; then
-      INCLUDE_NEXT=include
-      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
-    else
-      INCLUDE_NEXT=include
-      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include
-    fi
-  fi
-
-
-
-
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether source code line length is unlimited" >&5
-printf %s "checking whether source code line length is unlimited... " >&6; }
-if test ${gl_cv_source_line_length_unlimited+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#ifdef __TANDEM
-choke me
-#endif
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "choke me" >/dev/null 2>&1
-then :
-  gl_cv_source_line_length_unlimited=no
-else $as_nop
-  gl_cv_source_line_length_unlimited=yes
-fi
-rm -rf conftest*
-
-
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_source_line_length_unlimited" >&5
-printf "%s\n" "$gl_cv_source_line_length_unlimited" >&6; }
-  if test $gl_cv_source_line_length_unlimited = no; then
-    PRAGMA_COLUMNS="#pragma COLUMNS 10000"
-  else
-    PRAGMA_COLUMNS=
-  fi
-
-
-
-
 
 
 
@@ -9534,7 +9698,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -9590,85 +9754,7 @@ printf "%s\n" "$gl_cv_next_dirent_h" >&6; }
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC options needed to detect all undeclared functions" >&5
-printf %s "checking for $CC options needed to detect all undeclared functions... " >&6; }
-if test ${ac_cv_c_undeclared_builtin_options+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  ac_save_CFLAGS=$CFLAGS
-   ac_cv_c_undeclared_builtin_options='cannot detect'
-   for ac_arg in '' -fno-builtin; do
-     CFLAGS="$ac_save_CFLAGS $ac_arg"
-     # This test program should *not* compile successfully.
-     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main (void)
-{
-(void) strchr;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
-then :
-
-else $as_nop
-  # This test program should compile successfully.
-        # No library function is consistently available on
-        # freestanding implementations, so test against a dummy
-        # declaration.  Include always-available headers on the
-        # off chance that they somehow elicit warnings.
-        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <float.h>
-#include <limits.h>
-#include <stdarg.h>
-#include <stddef.h>
-extern void ac_decl (int, char *);
-
-int
-main (void)
-{
-(void) ac_decl (0, (char *) 0);
-  (void) ac_decl;
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
-then :
-  if test x"$ac_arg" = x
-then :
-  ac_cv_c_undeclared_builtin_options='none needed'
-else $as_nop
-  ac_cv_c_undeclared_builtin_options=$ac_arg
-fi
-          break
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-    done
-    CFLAGS=$ac_save_CFLAGS
 
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_undeclared_builtin_options" >&5
-printf "%s\n" "$ac_cv_c_undeclared_builtin_options" >&6; }
-  case $ac_cv_c_undeclared_builtin_options in #(
-  'cannot detect') :
-    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "cannot make $CC report undeclared builtins
-See \`config.log' for more details" "$LINENO" 5; } ;; #(
-  'none needed') :
-    ac_c_undeclared_builtin_options='' ;; #(
-  *) :
-    ac_c_undeclared_builtin_options=$ac_cv_c_undeclared_builtin_options ;;
-esac
 
 gl_mda_defines='
 #if defined _WIN32 && !defined __CYGWIN__
@@ -9837,7 +9923,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -10107,6 +10193,322 @@ printf "%s\n" "$gl_cv_header_errno_h_EOVERFLOW" >&6; }
   fi
 
 
+
+
+
+
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_error_h='<'error.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <error.h>" >&5
+printf %s "checking absolute name of <error.h>... " >&6; }
+if test ${gl_cv_next_error_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+             if test $ac_cv_header_error_h = yes; then
+
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <error.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw* | windows*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'error.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_error_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+          gl_header=$gl_cv_absolute_error_h
+          gl_cv_next_error_h='"'$gl_header'"'
+          else
+               gl_cv_next_error_h='<'error.h'>'
+             fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_error_h" >&5
+printf "%s\n" "$gl_cv_next_error_h" >&6; }
+     fi
+     NEXT_ERROR_H=$gl_cv_next_error_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'error.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_error_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_ERROR_H=$gl_next_as_first_directive
+
+
+
+
+  if test $ac_cv_header_error_h = yes; then
+    HAVE_ERROR_H=1
+  else
+    HAVE_ERROR_H=0
+  fi
+
+
+  REPLACE_ERROR=0
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for error" >&5
+printf %s "checking for error... " >&6; }
+if test ${gl_cv_onwards_func_error+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "error" "ac_cv_have_decl_error" "#include <error.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_error" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_error = yes; then
+             ac_fn_c_check_func "$LINENO" "error" "ac_cv_func_error"
+if test "x$ac_cv_func_error" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_error = yes; then
+               gl_cv_onwards_func_error=yes
+             else
+                                                            gl_cv_onwards_func_error='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_error='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "error" "ac_cv_func_error"
+if test "x$ac_cv_func_error" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_error=$ac_cv_func_error
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_error" >&5
+printf "%s\n" "$gl_cv_onwards_func_error" >&6; }
+
+  case "$gl_cv_onwards_func_error" in
+    future*) ac_cv_func_error=no ;;
+    *)       ac_cv_func_error=$gl_cv_onwards_func_error ;;
+  esac
+  if test $ac_cv_func_error = yes; then
+
+printf "%s\n" "#define HAVE_ERROR 1" >>confdefs.h
+
+  fi
+
+
+  if test $ac_cv_func_error = yes; then
+    HAVE_ERROR=1
+  else
+    HAVE_ERROR=0
+    case "$gl_cv_onwards_func_error" in
+      future*) REPLACE_ERROR=1 ;;
+    esac
+  fi
+
+        ac_fn_check_decl "$LINENO" "error_at_line" "ac_cv_have_decl_error_at_line" "#include <error.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_error_at_line" = xyes
+then :
+
+fi
+  if test $ac_cv_have_decl_error_at_line = yes; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for error_at_line" >&5
+printf %s "checking for error_at_line... " >&6; }
+if test ${ac_cv_lib_error_at_line+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <error.h>
+int
+main (void)
+{
+error_at_line (0, 0, "", 0, "an error occurred");
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_error_at_line=yes
+else $as_nop
+  ac_cv_lib_error_at_line=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_error_at_line" >&5
+printf "%s\n" "$ac_cv_lib_error_at_line" >&6; }
+  else
+    ac_cv_lib_error_at_line=no
+  fi
+  if test $ac_cv_lib_error_at_line = yes; then
+    HAVE_ERROR_AT_LINE=1
+  else
+    HAVE_ERROR_AT_LINE=0
+  fi
+  REPLACE_ERROR_AT_LINE=0
+
+  if test $ac_cv_func_error = yes && test $ac_cv_lib_error_at_line = yes; then
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working error function" >&5
+printf %s "checking for working error function... " >&6; }
+if test ${gl_cv_func_working_error+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test $cross_compiling != yes; then
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+              #include <error.h>
+              static void print_no_progname (void) {}
+
+int
+main (void)
+{
+
+              error_print_progname = print_no_progname;
+              error (0, 0, "foo");
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  rm -f conftest.out
+            if test -s conftest$ac_exeext \
+               && ./conftest$ac_exeext 2> conftest.out; then
+              if grep ' ' conftest.out >/dev/null; then
+                gl_cv_func_working_error=no
+              else
+                gl_cv_func_working_error=yes
+              fi
+            else
+              gl_cv_func_working_error=no
+            fi
+            rm -f conftest.out
+
+else $as_nop
+  gl_cv_func_working_error=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+       else
+         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+              #include <error.h>
+
+int
+main (void)
+{
+
+              error (0, 0, "foo");
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  case "$host_os" in
+                               # Guess yes on glibc systems.
+              *-gnu* | gnu*)   gl_cv_func_working_error="guessing yes" ;;
+                               # Guess no on Android.
+              linux*-android*) gl_cv_func_working_error="guessing no" ;;
+                               # If we don't know, obey --enable-cross-guesses.
+              *)               gl_cv_func_working_error="$gl_cross_guess_normal" ;;
+            esac
+
+else $as_nop
+  gl_cv_func_working_error=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+       fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_working_error" >&5
+printf "%s\n" "$gl_cv_func_working_error" >&6; }
+    case "$gl_cv_func_working_error" in
+      *no)
+        REPLACE_ERROR=1
+        REPLACE_ERROR_AT_LINE=1
+        ;;
+    esac
+  fi
+
+  if test $HAVE_ERROR = 0 || test $REPLACE_ERROR = 1 \
+     || test $HAVE_ERROR_AT_LINE = 0 || test $REPLACE_ERROR_AT_LINE = 1; then
+    COMPILE_ERROR_C=1
+  else
+    COMPILE_ERROR_C=0
+  fi
+
+
+
+
+
+
 ac_fn_check_decl "$LINENO" "strerror_r" "ac_cv_have_decl_strerror_r" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_strerror_r" = xyes
 then :
@@ -10368,9 +10770,9 @@ else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                  # Guess 'no' on native Windows.
-          mingw*) gl_cv_header_working_fcntl_h='no' ;;
-          *)      gl_cv_header_working_fcntl_h=cross-compiling ;;
+                             # Guess 'no' on native Windows.
+          mingw* | windows*) gl_cv_header_working_fcntl_h='no' ;;
+          *)                 gl_cv_header_working_fcntl_h=cross-compiling ;;
         esac
 
 else $as_nop
@@ -10589,7 +10991,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -10642,7 +11044,6 @@ printf "%s\n" "$gl_cv_next_fcntl_h" >&6; }
 
 
 
-
     HAVE_ACOSF=1;
   HAVE_ACOSL=1;
   HAVE_ASINF=1;
@@ -10703,6 +11104,9 @@ printf "%s\n" "$gl_cv_next_fcntl_h" >&6; }
   HAVE_TANF=1;
   HAVE_TANL=1;
   HAVE_TANHF=1;
+  HAVE_TOTALORDER=1;
+  HAVE_TOTALORDERF=1;
+  HAVE_TOTALORDERL=1;
   HAVE_DECL_ACOSL=1;
   HAVE_DECL_ASINL=1;
   HAVE_DECL_ATANL=1;
@@ -10780,6 +11184,7 @@ printf "%s\n" "$gl_cv_next_fcntl_h" >&6; }
   REPLACE_ISFINITE=0;
   REPLACE_ISINF=0;
   REPLACE_ISNAN=0;
+  REPLACE_LDEXP=0;
   REPLACE_LDEXPL=0;
   REPLACE_LOG=0;
   REPLACE_LOGF=0;
@@ -10815,6 +11220,9 @@ printf "%s\n" "$gl_cv_next_fcntl_h" >&6; }
   REPLACE_SQRTL=0;
   REPLACE_TANF=0;
   REPLACE_TANHF=0;
+  REPLACE_TOTALORDER=0;
+  REPLACE_TOTALORDERF=0;
+  REPLACE_TOTALORDERL=0;
   REPLACE_TRUNC=0;
   REPLACE_TRUNCF=0;
   REPLACE_TRUNCL=0;
@@ -11075,6 +11483,10 @@ printf "%s\n" "#define HAVE_DECL_ALARM $ac_have_decl" >>confdefs.h
 
 
 
+  GL_GNULIB_LDEXP=0
+
+
+
   GL_GNULIB_LDEXPF=0
 
 
@@ -11231,6 +11643,18 @@ printf "%s\n" "#define HAVE_DECL_ALARM $ac_have_decl" >>confdefs.h
 
 
 
+  GL_GNULIB_TOTALORDER=0
+
+
+
+  GL_GNULIB_TOTALORDERF=0
+
+
+
+  GL_GNULIB_TOTALORDERL=0
+
+
+
   GL_GNULIB_TRUNC=0
 
 
@@ -11324,6 +11748,7 @@ printf "%s\n" "#define HAVE_SAME_LONG_DOUBLE_AS_DOUBLE 1" >>confdefs.h
   HAVE_MKNOD=1;
   HAVE_MKNODAT=1;
   HAVE_UTIMENSAT=1;
+  REPLACE_CHMOD=0;
   REPLACE_FCHMODAT=0;
   REPLACE_FSTAT=0;
   REPLACE_FSTATAT=0;
@@ -11384,7 +11809,7 @@ fi
 
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for 64-bit off_t" >&5
 printf %s "checking for 64-bit off_t... " >&6; }
 if test ${gl_cv_type_off_t_64+y}
@@ -11552,7 +11977,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -11632,7 +12057,7 @@ fi
 
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
       ac_fn_c_check_header_compile "$LINENO" "sdkddkver.h" "ac_cv_header_sdkddkver_h" "$ac_includes_default"
 if test "x$ac_cv_header_sdkddkver_h" = xyes
 then :
@@ -11649,6 +12074,10 @@ fi
 
 
 
+  GL_GNULIB_CHMOD=0
+
+
+
   GL_GNULIB_FCHMODAT=0
 
 
@@ -11728,7 +12157,6 @@ fi
 
 
 
-
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether getcwd (NULL, 0) allocates memory for result" >&5
 printf %s "checking whether getcwd (NULL, 0) allocates memory for result... " >&6; }
 if test ${gl_cv_func_getcwd_null+y}
@@ -11742,6 +12170,8 @@ then :
             *-gnu* | gnu*) gl_cv_func_getcwd_null="guessing yes";;
                            # Guess yes on musl systems.
             *-musl*)       gl_cv_func_getcwd_null="guessing yes";;
+                           # Guess yes on systems that emulate the Linux system calls.
+            midipix*)      gl_cv_func_getcwd_null="guessing yes";;
                            # Guess yes on Cygwin.
             cygwin*)       gl_cv_func_getcwd_null="guessing yes";;
                            # If we don't know, obey --enable-cross-guesses.
@@ -11855,7 +12285,9 @@ printf "%s\n" "$gl_cv_func_getcwd_posix_signature" >&6; }
   HAVE_DECL_FTELLO=1;
   HAVE_DECL_GETDELIM=1;
   HAVE_DECL_GETLINE=1;
+  HAVE_DECL_GETW=1;
   HAVE_DECL_OBSTACK_PRINTF=1;
+  HAVE_DECL_PUTW=1;
   HAVE_DECL_SNPRINTF=1;
   HAVE_DECL_VSNPRINTF=1;
   HAVE_DPRINTF=1;
@@ -11911,7 +12343,6 @@ printf "%s\n" "#define HAVE_DECL_GETDELIM $ac_have_decl" >>confdefs.h
 
 
 
-
   GL_GNULIB_DPRINTF=0
 
 
@@ -12210,7 +12641,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -12458,8 +12889,8 @@ fi
           fi
         else
           case "$host_os" in
-            darwin* | aix* | mingw*) gl_cv_func_getopt_posix="guessing no";;
-            *)                       gl_cv_func_getopt_posix="guessing yes";;
+            darwin* | aix* | mingw* | windows*) gl_cv_func_getopt_posix="guessing no";;
+            *)                                  gl_cv_func_getopt_posix="guessing yes";;
           esac
         fi
 
@@ -12788,10 +13219,67 @@ printf "%s\n" "$gl_cv_func_getopt_long_gnu" >&6; }
 
 
 
-
 :
 
 
+
+
+
+          ac_fn_check_decl "$LINENO" "timespec_get" "ac_cv_have_decl_timespec_get" "#include <time.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_timespec_get" = xyes
+then :
+
+fi
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for timespec_get" >&5
+printf %s "checking for timespec_get... " >&6; }
+if test ${gl_cv_onwards_func_timespec_get+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test $ac_cv_have_decl_timespec_get = yes; then
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <time.h>
+              struct timespec ts;
+
+int
+main (void)
+{
+return timespec_get (&ts, 0);
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_onwards_func_timespec_get=yes
+else $as_nop
+  gl_cv_onwards_func_timespec_get=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+     else
+       gl_cv_onwards_func_timespec_get=no
+     fi
+     case "$host_os" in
+       linux*-android*)
+         if test $gl_cv_onwards_func_timespec_get = no; then
+           gl_cv_onwards_func_timespec_get='future OS version'
+         fi
+         ;;
+     esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_timespec_get" >&5
+printf "%s\n" "$gl_cv_onwards_func_timespec_get" >&6; }
+  case "$gl_cv_onwards_func_timespec_get" in
+    future*) gl_cv_func_timespec_get=no ;;
+    *)       gl_cv_func_timespec_get=$gl_cv_onwards_func_timespec_get ;;
+  esac
+
+
     HAVE_GETTIMEOFDAY=1;
   HAVE_STRUCT_TIMEVAL=1;
   HAVE_SYS_TIME_H=1;
@@ -12837,7 +13325,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -13038,7 +13526,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -13100,6 +13588,8 @@ else $as_nop
             int wb = WORD_BIT;
             int ullw = ULLONG_WIDTH;
             int bw = BOOL_WIDTH;
+            int bm = BOOL_MAX;
+            int mblm = MB_LEN_MAX;
 
 int
 main (void)
@@ -13119,11 +13609,37 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_limits_width" >&5
 printf "%s\n" "$gl_cv_header_limits_width" >&6; }
-  if test "$gl_cv_header_limits_width" = yes; then
-    GL_GENERATE_LIMITS_H=false
-  else
-    GL_GENERATE_LIMITS_H=true
-  fi
+  GL_GENERATE_LIMITS_H=true
+  if test "$gl_cv_header_limits_width" = yes
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether limits.h has SSIZE_MAX" >&5
+printf %s "checking whether limits.h has SSIZE_MAX... " >&6; }
+if test ${gl_cv_header_limits_ssize_max+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+               #ifndef SSIZE_MAX
+                 #error "SSIZE_MAX is not defined"
+               #endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_header_limits_ssize_max=yes
+else $as_nop
+  gl_cv_header_limits_ssize_max=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_limits_ssize_max" >&5
+printf "%s\n" "$gl_cv_header_limits_ssize_max" >&6; }
+     if test "$gl_cv_header_limits_ssize_max" = yes; then
+       GL_GENERATE_LIMITS_H=false
+     fi
+fi
 
 
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for wint_t" >&5
@@ -13321,7 +13837,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -13475,7 +13991,10 @@ intmax_t i = INTMAX_MAX;
 uintmax_t j = UINTMAX_MAX;
 
 /* Check that SIZE_MAX has the correct type, if possible.  */
-#if 201112 <= __STDC_VERSION__
+/* ISO C 11 mandates _Generic, but GCC versions < 4.9 lack it.  */
+#if 201112 <= __STDC_VERSION__ \
+    && (!defined __GNUC__ || 4 < __GNUC__ + (9 <= __GNUC_MINOR__) \
+        || defined __clang__)
 int k = _Generic (SIZE_MAX, size_t: 0);
 #elif (2 <= __GNUC__ || 4 <= __clang_major__ || defined __IBM__TYPEOF__ \
        || (0x5110 <= __SUNPRO_C && !__STDC__))
@@ -13556,10 +14075,10 @@ then :
                                                     if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                         # Guess yes on native Windows.
-                 mingw*) gl_cv_header_working_stdint_h="guessing yes" ;;
-                         # In general, assume it works.
-                 *)      gl_cv_header_working_stdint_h="guessing yes" ;;
+                                    # Guess yes on native Windows.
+                 mingw* | windows*) gl_cv_header_working_stdint_h="guessing yes" ;;
+                                    # In general, assume it works.
+                 *)                 gl_cv_header_working_stdint_h="guessing yes" ;;
                esac
 
 else $as_nop
@@ -14073,6 +14592,10 @@ printf "%s\n" "$ac_res" >&6; }
   HAVE_DECL_STRTOIMAX=1;
   HAVE_DECL_STRTOUMAX=1;
   HAVE_IMAXDIV_T=1;
+  HAVE_IMAXABS=1;
+  HAVE_IMAXDIV=1;
+  REPLACE_IMAXABS=0;
+  REPLACE_IMAXDIV=0;
   REPLACE_STRTOIMAX=0;
   REPLACE_STRTOUMAX=0;
   INT32_MAX_LT_INTMAX_MAX=1;
@@ -14120,7 +14643,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -14646,22 +15169,23 @@ unsigned short int ascii_mm[] =
 		int use_ebcdic (int i) {
 		  return ebcdic_mm[i] + ebcdic_ii[i];
 		}
-		extern int foo;
-
-int
-main (void)
-{
-return use_ascii (foo) == use_ebcdic (foo);
-  ;
-  return 0;
-}
+		int
+		main (int argc, char **argv)
+		{
+		  /* Intimidate the compiler so that it does not
+		     optimize the arrays away.  */
+		  char *p = argv[0];
+		  ascii_mm[1] = *p++; ebcdic_mm[1] = *p++;
+		  ascii_ii[1] = *p++; ebcdic_ii[1] = *p++;
+		  return use_ascii (argc) == use_ebcdic (*p);
+		}
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"
+if ac_fn_c_try_link "$LINENO"
 then :
-  if grep BIGenDianSyS conftest.$ac_objext >/dev/null; then
+  if grep BIGenDianSyS conftest$ac_exeext >/dev/null; then
 	      ac_cv_c_bigendian=yes
 	    fi
-	    if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
+	    if grep LiTTleEnDian conftest$ac_exeext >/dev/null ; then
 	      if test "$ac_cv_c_bigendian" = unknown; then
 		ac_cv_c_bigendian=no
 	      else
@@ -14670,7 +15194,8 @@ then :
 	      fi
 	    fi
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -15086,22 +15611,23 @@ unsigned short int ascii_mm[] =
 		int use_ebcdic (int i) {
 		  return ebcdic_mm[i] + ebcdic_ii[i];
 		}
-		extern int foo;
-
-int
-main (void)
-{
-return use_ascii (foo) == use_ebcdic (foo);
-  ;
-  return 0;
-}
+		int
+		main (int argc, char **argv)
+		{
+		  /* Intimidate the compiler so that it does not
+		     optimize the arrays away.  */
+		  char *p = argv[0];
+		  ascii_mm[1] = *p++; ebcdic_mm[1] = *p++;
+		  ascii_ii[1] = *p++; ebcdic_ii[1] = *p++;
+		  return use_ascii (argc) == use_ebcdic (*p);
+		}
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"
+if ac_fn_c_try_link "$LINENO"
 then :
-  if grep BIGenDianSyS conftest.$ac_objext >/dev/null; then
+  if grep BIGenDianSyS conftest$ac_exeext >/dev/null; then
 	      ac_cv_c_bigendian=yes
 	    fi
-	    if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
+	    if grep LiTTleEnDian conftest$ac_exeext >/dev/null ; then
 	      if test "$ac_cv_c_bigendian" = unknown; then
 		ac_cv_c_bigendian=no
 	      else
@@ -15110,7 +15636,8 @@ then :
 	      fi
 	    fi
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -15165,6 +15692,152 @@ printf "%s\n" "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
 
 
 
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking where to find the exponent in a 'long double'" >&5
+printf %s "checking where to find the exponent in a 'long double'... " >&6; }
+if test ${gl_cv_cc_long_double_expbit0+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+
+                              gl_cv_cc_long_double_expbit0="unknown"
+          case "$host_os" in
+            mingw* | windows*)
+              # On native Windows (little-endian), we know the result
+              # in two cases: mingw, MSVC.
+              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef __MINGW32__
+ Known
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Known" >/dev/null 2>&1
+then :
+  gl_cv_cc_long_double_expbit0="word 2 bit 0"
+fi
+rm -rf conftest*
+
+              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#ifdef _MSC_VER
+ Known
+#endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Known" >/dev/null 2>&1
+then :
+  gl_cv_cc_long_double_expbit0="word 1 bit 20"
+fi
+rm -rf conftest*
+
+              ;;
+          esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <float.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#define NWORDS \
+  ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
+typedef union { long double value; unsigned int word[NWORDS]; }
+        memory_long_double;
+static unsigned int ored_words[NWORDS];
+static unsigned int anded_words[NWORDS];
+static void add_to_ored_words (long double *x)
+{
+  memory_long_double m;
+  size_t i;
+  /* Clear it first, in case
+     sizeof (long double) < sizeof (memory_long_double).  */
+  memset (&m, 0, sizeof (memory_long_double));
+  m.value = *x;
+  for (i = 0; i < NWORDS; i++)
+    {
+      ored_words[i] |= m.word[i];
+      anded_words[i] &= m.word[i];
+    }
+}
+int main ()
+{
+  static long double samples[5] = { 0.25L, 0.5L, 1.0L, 2.0L, 4.0L };
+  size_t j;
+  FILE *fp = fopen ("conftest.out", "w");
+  if (fp == NULL)
+    return 1;
+  for (j = 0; j < NWORDS; j++)
+    anded_words[j] = ~ (unsigned int) 0;
+  for (j = 0; j < 5; j++)
+    add_to_ored_words (&samples[j]);
+  /* Remove bits that are common (e.g. if representation of the first mantissa
+     bit is explicit).  */
+  for (j = 0; j < NWORDS; j++)
+    ored_words[j] &= ~anded_words[j];
+  /* Now find the nonzero word.  */
+  for (j = 0; j < NWORDS; j++)
+    if (ored_words[j] != 0)
+      break;
+  if (j < NWORDS)
+    {
+      size_t i;
+      for (i = j + 1; i < NWORDS; i++)
+        if (ored_words[i] != 0)
+          {
+            fprintf (fp, "unknown");
+            return (fclose (fp) != 0);
+          }
+      for (i = 0; ; i++)
+        if ((ored_words[j] >> i) & 1)
+          {
+            fprintf (fp, "word %d bit %d", (int) j, (int) i);
+            return (fclose (fp) != 0);
+          }
+    }
+  fprintf (fp, "unknown");
+  return (fclose (fp) != 0);
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_cc_long_double_expbit0=`cat conftest.out`
+else $as_nop
+  gl_cv_cc_long_double_expbit0="unknown"
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      rm -f conftest.out
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_long_double_expbit0" >&5
+printf "%s\n" "$gl_cv_cc_long_double_expbit0" >&6; }
+  case "$gl_cv_cc_long_double_expbit0" in
+    word*bit*)
+      word=`echo "$gl_cv_cc_long_double_expbit0" | sed -e 's/word //' -e 's/ bit.*//'`
+      bit=`echo "$gl_cv_cc_long_double_expbit0" | sed -e 's/word.*bit //'`
+
+printf "%s\n" "#define LDBL_EXPBIT0_WORD $word" >>confdefs.h
+
+
+printf "%s\n" "#define LDBL_EXPBIT0_BIT $bit" >>confdefs.h
+
+      ;;
+  esac
+
+
+
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether malloc (0) returns nonnull" >&5
 printf %s "checking whether malloc (0) returns nonnull... " >&6; }
 if test ${ac_cv_func_malloc_0_nonnull+y}
@@ -15176,8 +15849,8 @@ then :
   case "$host_os" in
           # Guess yes on platforms where we know the result.
           *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
-          | gnu* | *-musl* | midnightbsd* \
-          | hpux* | solaris* | cygwin* | mingw* | msys* )
+          | gnu* | *-musl* | midipix* | midnightbsd* \
+          | hpux* | solaris* | cygwin* | mingw* | windows* | msys* )
             ac_cv_func_malloc_0_nonnull="guessing yes" ;;
           # If we don't know, obey --enable-cross-guesses.
           *) ac_cv_func_malloc_0_nonnull="$gl_cross_guess_normal" ;;
@@ -15192,7 +15865,8 @@ int
 main (void)
 {
 void *p = malloc (0);
-            int result = !p;
+            void * volatile vp = p;
+            int result = !vp;
             free (p);
             return result;
   ;
@@ -15262,7 +15936,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -15384,6 +16058,989 @@ printf "%s\n" "$gl_cv_header_math_huge_val_works" >&6; }
 
 
 
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for mbstate_t" >&5
+printf %s "checking for mbstate_t... " >&6; }
+if test ${ac_cv_type_mbstate_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+             #include <wchar.h>
+int
+main (void)
+{
+mbstate_t x; return sizeof x;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_type_mbstate_t=yes
+else $as_nop
+  ac_cv_type_mbstate_t=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_type_mbstate_t" >&5
+printf "%s\n" "$ac_cv_type_mbstate_t" >&6; }
+   if test $ac_cv_type_mbstate_t = yes; then
+
+printf "%s\n" "#define HAVE_MBSTATE_T 1" >>confdefs.h
+
+   else
+
+printf "%s\n" "#define mbstate_t int" >>confdefs.h
+
+   fi
+
+
+    HAVE_BTOWC=1;
+  HAVE_MBSINIT=1;
+  HAVE_MBRTOWC=1;
+  HAVE_MBRLEN=1;
+  HAVE_MBSRTOWCS=1;
+  HAVE_MBSNRTOWCS=1;
+  HAVE_WCRTOMB=1;
+  HAVE_WCSRTOMBS=1;
+  HAVE_WCSNRTOMBS=1;
+  HAVE_WMEMCHR=1;
+  HAVE_WMEMCMP=1;
+  HAVE_WMEMCPY=1;
+  HAVE_WMEMMOVE=1;
+  HAVE_WMEMPCPY=1;
+  HAVE_WMEMSET=1;
+  HAVE_WCSLEN=1;
+  HAVE_WCSNLEN=1;
+  HAVE_WCSCPY=1;
+  HAVE_WCPCPY=1;
+  HAVE_WCSNCPY=1;
+  HAVE_WCPNCPY=1;
+  HAVE_WCSCAT=1;
+  HAVE_WCSNCAT=1;
+  HAVE_WCSCMP=1;
+  HAVE_WCSNCMP=1;
+  HAVE_WCSCASECMP=1;
+  HAVE_WCSNCASECMP=1;
+  HAVE_WCSCOLL=1;
+  HAVE_WCSXFRM=1;
+  HAVE_WCSDUP=1;
+  HAVE_WCSCHR=1;
+  HAVE_WCSRCHR=1;
+  HAVE_WCSCSPN=1;
+  HAVE_WCSSPN=1;
+  HAVE_WCSPBRK=1;
+  HAVE_WCSSTR=1;
+  HAVE_WCSTOK=1;
+  HAVE_WCSWIDTH=1;
+  HAVE_WCSFTIME=1;
+  HAVE_DECL_WCTOB=1;
+  HAVE_DECL_WCSDUP=1;
+  HAVE_DECL_WCWIDTH=1;
+  REPLACE_MBSTATE_T=0;
+  REPLACE_BTOWC=0;
+  REPLACE_WCTOB=0;
+  REPLACE_MBSINIT=0;
+  REPLACE_MBRTOWC=0;
+  REPLACE_MBRLEN=0;
+  REPLACE_MBSRTOWCS=0;
+  REPLACE_MBSNRTOWCS=0;
+  REPLACE_WCRTOMB=0;
+  REPLACE_WCSRTOMBS=0;
+  REPLACE_WCSNRTOMBS=0;
+  REPLACE_WCWIDTH=0;
+  REPLACE_WCSWIDTH=0;
+  REPLACE_WCSFTIME=0;
+  REPLACE_WCSCMP=0;
+  REPLACE_WCSNCMP=0;
+  REPLACE_WCSSTR=0;
+  REPLACE_WCSTOK=0;
+  REPLACE_WMEMCMP=0;
+  REPLACE_WMEMPCPY=0;
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for nl_langinfo and CODESET" >&5
+printf %s "checking for nl_langinfo and CODESET... " >&6; }
+if test ${am_cv_langinfo_codeset+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <langinfo.h>
+int
+main (void)
+{
+char* cs = nl_langinfo(CODESET); return !cs;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  am_cv_langinfo_codeset=yes
+else $as_nop
+  am_cv_langinfo_codeset=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_langinfo_codeset" >&5
+printf "%s\n" "$am_cv_langinfo_codeset" >&6; }
+  if test $am_cv_langinfo_codeset = yes; then
+
+printf "%s\n" "#define HAVE_LANGINFO_CODESET 1" >>confdefs.h
+
+  fi
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a traditional japanese locale" >&5
+printf %s "checking for a traditional japanese locale... " >&6; }
+if test ${gt_cv_locale_ja+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether MB_CUR_MAX is > 1.  This excludes the dysfunctional locales
+     on Cygwin 1.5.x.  */
+  if (MB_CUR_MAX == 1)
+    return 1;
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw* | windows*)
+          # Note that on native Windows, the Japanese locale is
+          # Japanese_Japan.932, and CP932 is very different from EUC-JP, so we
+          # cannot use it here.
+          gt_cv_locale_ja=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the AIX locale name.
+          if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_ja=ja_JP
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=ja_JP.EUC-JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_ja=ja_JP.EUC-JP
+            else
+              # Test for the HP-UX, OSF/1, NetBSD locale name.
+              if (LC_ALL=ja_JP.eucJP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_ja=ja_JP.eucJP
+              else
+                # Test for the IRIX, FreeBSD locale name.
+                if (LC_ALL=ja_JP.EUC LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_ja=ja_JP.EUC
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=ja LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_ja=ja
+                  else
+                    # Special test for NetBSD 1.6.
+                    if test -f /usr/share/locale/ja_JP.eucJP/LC_CTYPE; then
+                      gt_cv_locale_ja=ja_JP.eucJP
+                    else
+                      # None found.
+                      gt_cv_locale_ja=none
+                    fi
+                  fi
+                fi
+              fi
+            fi
+          fi
+          ;;
+      esac
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_ja" >&5
+printf "%s\n" "$gt_cv_locale_ja" >&6; }
+  LOCALE_JA=$gt_cv_locale_ja
+  case $LOCALE_JA in #(
+    '' | *[[:space:]\"\$\'*[]*)
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: invalid locale \"$LOCALE_JA\"; assuming \"none\"" >&5
+printf "%s\n" "$as_me: WARNING: invalid locale \"$LOCALE_JA\"; assuming \"none\"" >&2;}
+      LOCALE_JA=none;;
+  esac
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a french Unicode locale" >&5
+printf %s "checking for a french Unicode locale... " >&6; }
+if test ${gt_cv_locale_fr_utf8+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    case "$host_os" in
+      *-musl* | midipix*)
+                                        gt_cv_locale_fr_utf8=fr_FR.UTF-8
+        ;;
+      *)
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main () {
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if !(defined __BEOS__ || defined __HAIKU__)
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in the abbreviation of the second month, the second
+     character (should be U+00E9: LATIN SMALL LETTER E WITH ACUTE) is
+     two bytes long, with UTF-8 encoding.  */
+  t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+  if (strftime (buf, sizeof (buf), "%b", &t) < 4
+      || buf[1] != (char) 0xc3 || buf[2] != (char) 0xa9 || buf[3] != 'v')
+    return 1;
+#endif
+#if !defined __BIONIC__ /* Bionic libc's 'struct lconv' is just a dummy.  */
+  /* Check whether the decimal separator is a comma.
+     On NetBSD 3.0 in the fr_FR.ISO8859-1 locale, localeconv()->decimal_point
+     are nl_langinfo(RADIXCHAR) are both ".".  */
+  if (localeconv () ->decimal_point[0] != ',') return 1;
+#endif
+  return 0;
+}
+
+_ACEOF
+        if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+          case "$host_os" in
+            # Handle native Windows specially, because there setlocale() interprets
+            # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+            # "fr" or "fra" as "French" or "French_France.1252",
+            # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+            # "ja" as "Japanese" or "Japanese_Japan.932",
+            # and similar.
+            mingw* | windows*)
+              # Test for the hypothetical native Windows locale name.
+              if (LC_ALL=French_France.65001 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=French_France.65001
+              else
+                # None found.
+                gt_cv_locale_fr_utf8=none
+              fi
+              ;;
+            *)
+              # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+              # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+              # configure script would override the LC_ALL setting. Likewise for
+              # LC_CTYPE, which is also set at the beginning of the configure script.
+              # Test for the usual locale name.
+              if (LC_ALL=fr_FR LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                gt_cv_locale_fr_utf8=fr_FR
+              else
+                # Test for the locale name with explicit encoding suffix.
+                if (LC_ALL=fr_FR.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                  gt_cv_locale_fr_utf8=fr_FR.UTF-8
+                else
+                  # Test for the Solaris 7 locale name.
+                  if (LC_ALL=fr.UTF-8 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+                    gt_cv_locale_fr_utf8=fr.UTF-8
+                  else
+                    # None found.
+                    gt_cv_locale_fr_utf8=none
+                  fi
+                fi
+              fi
+              ;;
+          esac
+        fi
+        rm -fr conftest*
+        ;;
+    esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_fr_utf8" >&5
+printf "%s\n" "$gt_cv_locale_fr_utf8" >&6; }
+  LOCALE_FR_UTF8=$gt_cv_locale_fr_utf8
+  case $LOCALE_FR_UTF8 in #(
+    '' | *[[:space:]\"\$\'*[]*)
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: invalid locale \"$LOCALE_FR_UTF8\"; assuming \"none\"" >&5
+printf "%s\n" "$as_me: WARNING: invalid locale \"$LOCALE_FR_UTF8\"; assuming \"none\"" >&2;}
+      LOCALE_FR_UTF8=none;;
+  esac
+
+
+      case "$host_os" in
+    *-musl* | midipix*)
+                  LC_COLLATE_IMPLEMENTED=false
+      LC_NUMERIC_IMPLEMENTED=false
+      LC_TIME_IMPLEMENTED=false
+      LC_MONETARY_IMPLEMENTED=false
+      ;;
+    *)
+      LC_COLLATE_IMPLEMENTED=true
+      LC_NUMERIC_IMPLEMENTED=true
+      LC_TIME_IMPLEMENTED=true
+      LC_MONETARY_IMPLEMENTED=true
+      ;;
+  esac
+
+
+
+
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a transitional chinese locale" >&5
+printf %s "checking for a transitional chinese locale... " >&6; }
+if test ${gt_cv_locale_zh_CN+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <time.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+struct tm t;
+char buf[16];
+int main ()
+{
+  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
+     imitates locale dependent behaviour by looking at the environment
+     variables, and all locales use the UTF-8 encoding.  */
+#if defined __BEOS__ || defined __HAIKU__
+  return 1;
+#else
+  /* Check whether the given locale name is recognized by the system.  */
+# if defined _WIN32 && !defined __CYGWIN__
+  /* On native Windows, setlocale(category, "") looks at the system settings,
+     not at the environment variables.  Also, when an encoding suffix such
+     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
+     category of the locale to "C".  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
+      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+    return 1;
+# else
+  if (setlocale (LC_ALL, "") == NULL) return 1;
+# endif
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
+     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.
+     On MirBSD 10, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
+# if HAVE_LANGINFO_CODESET
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
+        || strcmp (cs, "UTF-8") == 0)
+      return 1;
+  }
+# endif
+# ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
+# endif
+  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
+     This excludes the UTF-8 encoding (except on MirBSD).  */
+  {
+    const char *p;
+    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
+    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
+    for (p = buf; *p != '\0'; p++)
+      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
+        return 1;
+  }
+  /* Check whether a typical GB18030 multibyte sequence is recognized as a
+     single wide character.  This excludes the GB2312 and GBK encodings.  */
+  if (mblen ("\203\062\332\066", 5) != 4)
+    return 1;
+  return 0;
+#endif
+}
+
+_ACEOF
+    if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && test -s conftest$ac_exeext; then
+      case "$host_os" in
+        # Handle native Windows specially, because there setlocale() interprets
+        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
+        # "fr" or "fra" as "French" or "French_France.1252",
+        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
+        # "ja" as "Japanese" or "Japanese_Japan.932",
+        # and similar.
+        mingw* | windows*)
+          # Test for the hypothetical native Windows locale name.
+          if (LC_ALL=Chinese_China.54936 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=Chinese_China.54936
+          else
+            # None found.
+            gt_cv_locale_zh_CN=none
+          fi
+          ;;
+        solaris2.8)
+          # On Solaris 8, the locales zh_CN.GB18030, zh_CN.GBK, zh.GBK are
+          # broken. One witness is the test case in gl_MBRTOWC_SANITYCHECK.
+          # Another witness is that "LC_ALL=zh_CN.GB18030 bash -c true" dumps core.
+          gt_cv_locale_zh_CN=none
+          ;;
+        *)
+          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
+          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
+          # configure script would override the LC_ALL setting. Likewise for
+          # LC_CTYPE, which is also set at the beginning of the configure script.
+          # Test for the locale name without encoding suffix.
+          if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+            gt_cv_locale_zh_CN=zh_CN
+          else
+            # Test for the locale name with explicit encoding suffix.
+            if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
+              gt_cv_locale_zh_CN=zh_CN.GB18030
+            else
+              # None found.
+              gt_cv_locale_zh_CN=none
+            fi
+          fi
+          ;;
+      esac
+    else
+      # If there was a link error, due to mblen(), the system is so old that
+      # it certainly doesn't have a chinese locale.
+      gt_cv_locale_zh_CN=none
+    fi
+    rm -fr conftest*
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_locale_zh_CN" >&5
+printf "%s\n" "$gt_cv_locale_zh_CN" >&6; }
+  LOCALE_ZH_CN=$gt_cv_locale_zh_CN
+  case $LOCALE_ZH_CN in #(
+    '' | *[[:space:]\"\$\'*[]*)
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: invalid locale \"$LOCALE_ZH_CN\"; assuming \"none\"" >&5
+printf "%s\n" "$as_me: WARNING: invalid locale \"$LOCALE_ZH_CN\"; assuming \"none\"" >&2;}
+      LOCALE_ZH_CN=none;;
+  esac
+
+
+
+
+
+
+
+
+
+        if case "$host_os" in
+       mingw* | windows*) true ;;
+       *) test $ac_cv_func_mbsinit = yes ;;
+     esac \
+    && test $ac_cv_func_mbrtowc = yes; then
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc handles incomplete characters" >&5
+printf %s "checking whether mbrtowc handles incomplete characters... " >&6; }
+if test ${gl_cv_func_mbrtowc_incomplete_state+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                     # Guess no on AIX and OSF/1.
+        aix* | osf*) gl_cv_func_mbrtowc_incomplete_state="guessing no" ;;
+                     # Guess yes otherwise.
+        *)           gl_cv_func_mbrtowc_incomplete_state="guessing yes" ;;
+      esac
+      if test $LOCALE_JA != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
+    {
+      const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      else
+        if test $LOCALE_FR_UTF8 != none; then
+          if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      const char input[] = "B\303\274\303\237er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 1, 1, &state) == (size_t)(-2))
+        if (mbsinit (&state))
+          return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_incomplete_state=yes
+else $as_nop
+  gl_cv_func_mbrtowc_incomplete_state=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+        fi
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_incomplete_state" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_incomplete_state" >&6; }
+
+
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mbrtowc works as well as mbtowc" >&5
+printf %s "checking whether mbrtowc works as well as mbtowc... " >&6; }
+if test ${gl_cv_func_mbrtowc_sanitycheck+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                    # Guess no on Solaris 8.
+        solaris2.8) gl_cv_func_mbrtowc_sanitycheck="guessing no" ;;
+                    # Guess yes otherwise.
+        *)          gl_cv_func_mbrtowc_sanitycheck="guessing yes" ;;
+      esac
+      if test $LOCALE_ZH_CN != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  /* This fails on Solaris 8:
+     mbrtowc returns 2, and sets wc to 0x00F0.
+     mbtowc returns 4 (correct) and sets wc to 0x5EDC.  */
+  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
+    {
+      char input[] = "B\250\271\201\060\211\070er"; /* "Büßer" */
+      mbstate_t state;
+      wchar_t wc;
+
+      memset (&state, '\0', sizeof (mbstate_t));
+      if (mbrtowc (&wc, input + 3, 6, &state) != 4
+          && mbtowc (&wc, input + 3, 6) == 4)
+        return 2;
+    }
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_mbrtowc_sanitycheck=yes
+else $as_nop
+  gl_cv_func_mbrtowc_sanitycheck=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_mbrtowc_sanitycheck" >&5
+printf "%s\n" "$gl_cv_func_mbrtowc_sanitycheck" >&6; }
+
+    REPLACE_MBSTATE_T=0
+    case "$gl_cv_func_mbrtowc_incomplete_state" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+    case "$gl_cv_func_mbrtowc_sanitycheck" in
+      *yes) ;;
+      *) REPLACE_MBSTATE_T=1 ;;
+    esac
+  else
+    REPLACE_MBSTATE_T=1
+  fi
+
+
+
+  case "$host_os" in
+    *-musl* | midipix*)
+
+printf "%s\n" "#define MUSL_LIBC 1" >>confdefs.h
+
+      ;;
+  esac
+
+
+
+  GL_GNULIB_BTOWC=0
+
+
+
+  GL_GNULIB_WCTOB=0
+
+
+
+  GL_GNULIB_MBSINIT=0
+
+
+
+  GL_GNULIB_MBSZERO=0
+
+
+
+  GL_GNULIB_MBRTOWC=0
+
+
+
+  GL_GNULIB_MBRLEN=0
+
+
+
+  GL_GNULIB_MBSRTOWCS=0
+
+
+
+  GL_GNULIB_MBSNRTOWCS=0
+
+
+
+  GL_GNULIB_WCRTOMB=0
+
+
+
+  GL_GNULIB_WCSRTOMBS=0
+
+
+
+  GL_GNULIB_WCSNRTOMBS=0
+
+
+
+  GL_GNULIB_WCWIDTH=0
+
+
+
+  GL_GNULIB_WMEMCHR=0
+
+
+
+  GL_GNULIB_WMEMCMP=0
+
+
+
+  GL_GNULIB_WMEMCPY=0
+
+
+
+  GL_GNULIB_WMEMMOVE=0
+
+
+
+  GL_GNULIB_WMEMPCPY=0
+
+
+
+  GL_GNULIB_WMEMSET=0
+
+
+
+  GL_GNULIB_WCSLEN=0
+
+
+
+  GL_GNULIB_WCSNLEN=0
+
+
+
+  GL_GNULIB_WCSCPY=0
+
+
+
+  GL_GNULIB_WCPCPY=0
+
+
+
+  GL_GNULIB_WCSNCPY=0
+
+
+
+  GL_GNULIB_WCPNCPY=0
+
+
+
+  GL_GNULIB_WCSCAT=0
+
+
+
+  GL_GNULIB_WCSNCAT=0
+
+
+
+  GL_GNULIB_WCSCMP=0
+
+
+
+  GL_GNULIB_WCSNCMP=0
+
+
+
+  GL_GNULIB_WCSCASECMP=0
+
+
+
+  GL_GNULIB_WCSNCASECMP=0
+
+
+
+  GL_GNULIB_WCSCOLL=0
+
+
+
+  GL_GNULIB_WCSXFRM=0
+
+
+
+  GL_GNULIB_WCSDUP=0
+
+
+
+  GL_GNULIB_WCSCHR=0
+
+
+
+  GL_GNULIB_WCSRCHR=0
+
+
+
+  GL_GNULIB_WCSCSPN=0
+
+
+
+  GL_GNULIB_WCSSPN=0
+
+
+
+  GL_GNULIB_WCSPBRK=0
+
+
+
+  GL_GNULIB_WCSSTR=0
+
+
+
+  GL_GNULIB_WCSTOK=0
+
+
+
+  GL_GNULIB_WCSWIDTH=0
+
+
+
+  GL_GNULIB_WCSFTIME=0
+
+
+
+  GL_GNULIB_WGETCWD=0
+
+
+
+  GL_GNULIB_MDA_WCSDUP=1
+
+
+
+
+
 
   # Check for mmap(). Don't use AC_FUNC_MMAP, because it checks too much: it
   # fails on HP-UX 11, because MAP_FIXED mappings do not work. But this is
@@ -15457,6 +17114,7 @@ printf "%s\n" "#define HAVE_MAP_ANONYMOUS 1" >>confdefs.h
   HAVE_FFSLL=1;
   HAVE_DECL_MEMMEM=1;
   HAVE_MEMPCPY=1;
+  HAVE_MEMSET_EXPLICIT=1;
   HAVE_DECL_MEMRCHR=1;
   HAVE_RAWMEMCHR=1;
   HAVE_STPCPY=1;
@@ -15478,6 +17136,8 @@ printf "%s\n" "#define HAVE_MAP_ANONYMOUS 1" >>confdefs.h
   REPLACE_FFSLL=0;
   REPLACE_MEMCHR=0;
   REPLACE_MEMMEM=0;
+  REPLACE_MEMPCPY=0;
+  REPLACE_STPCPY=0;
   REPLACE_STPNCPY=0;
   REPLACE_STRCHRNUL=0;
   REPLACE_STRDUP=0;
@@ -15518,12 +17178,12 @@ else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                           # Guess no on Android.
-          linux*-android*) gl_cv_func_memchr_works="guessing no" ;;
-                           # Guess yes on native Windows.
-          mingw*)          gl_cv_func_memchr_works="guessing yes" ;;
-                           # If we don't know, obey --enable-cross-guesses.
-          *)               gl_cv_func_memchr_works="$gl_cross_guess_normal" ;;
+                             # Guess no on Android.
+          linux*-android*)   gl_cv_func_memchr_works="guessing no" ;;
+                             # Guess yes on native Windows.
+          mingw* | windows*) gl_cv_func_memchr_works="guessing yes" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+          *)                 gl_cv_func_memchr_works="$gl_cross_guess_normal" ;;
         esac
 
 else $as_nop
@@ -15644,6 +17304,10 @@ printf "%s\n" "$gl_cv_func_memchr_works" >&6; }
 
 
 
+  GL_GNULIB_MEMSET_EXPLICIT=0
+
+
+
   GL_GNULIB_RAWMEMCHR=0
 
 
@@ -15955,7 +17619,6 @@ printf "%s\n" "#define PROMOTED_MODE_T $gl_cv_promoted_mode_t" >>confdefs.h
 
 
 
-
   if test $REPLACE_MALLOC_FOR_MALLOC_POSIX = 1; then
     REPLACE_REALLOC_FOR_REALLOC_POSIX=1
   fi
@@ -15963,101 +17626,6 @@ printf "%s\n" "#define PROMOTED_MODE_T $gl_cv_promoted_mode_t" >>confdefs.h
 
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for stdbool.h that conforms to C99" >&5
-printf %s "checking for stdbool.h that conforms to C99... " >&6; }
-if test ${ac_cv_header_stdbool_h+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-             #include <stdbool.h>
-
-             #ifdef __cplusplus
-              typedef bool Bool;
-             #else
-              typedef _Bool Bool;
-              #ifndef bool
-               "error: bool is not defined"
-              #endif
-              #ifndef false
-               "error: false is not defined"
-              #endif
-              #if false
-               "error: false is not 0"
-              #endif
-              #ifndef true
-               "error: true is not defined"
-              #endif
-              #if true != 1
-               "error: true is not 1"
-              #endif
-             #endif
-
-             #ifndef __bool_true_false_are_defined
-              "error: __bool_true_false_are_defined is not defined"
-             #endif
-
-             struct s { Bool s: 1; Bool t; bool u: 1; bool v; } s;
-
-             char a[true == 1 ? 1 : -1];
-             char b[false == 0 ? 1 : -1];
-             char c[__bool_true_false_are_defined == 1 ? 1 : -1];
-             char d[(bool) 0.5 == true ? 1 : -1];
-             /* See body of main program for 'e'.  */
-             char f[(Bool) 0.0 == false ? 1 : -1];
-             char g[true];
-             char h[sizeof (Bool)];
-             char i[sizeof s.t];
-             enum { j = false, k = true, l = false * true, m = true * 256 };
-             /* The following fails for
-                HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */
-             Bool n[m];
-             char o[sizeof n == m * sizeof n[0] ? 1 : -1];
-             char p[-1 - (Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
-             /* Catch a bug in an HP-UX C compiler.  See
-                https://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
-                https://lists.gnu.org/r/bug-coreutils/2005-11/msg00161.html
-              */
-             Bool q = true;
-             Bool *pq = &q;
-             bool *qq = &q;
-
-int
-main (void)
-{
-
-             bool e = &s;
-             *pq |= q; *pq |= ! q;
-             *qq |= q; *qq |= ! q;
-             /* Refer to every declared value, to avoid compiler optimizations.  */
-             return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l
-                     + !m + !n + !o + !p + !q + !pq + !qq);
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
-then :
-  ac_cv_header_stdbool_h=yes
-else $as_nop
-  ac_cv_header_stdbool_h=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdbool_h" >&5
-printf "%s\n" "$ac_cv_header_stdbool_h" >&6; }
-   ac_fn_c_check_type "$LINENO" "_Bool" "ac_cv_type__Bool" "$ac_includes_default"
-if test "x$ac_cv_type__Bool" = xyes
-then :
-
-printf "%s\n" "#define HAVE__BOOL 1" >>confdefs.h
-
-
-fi
-
 
 
     REPLACE_NULL=0;
@@ -16115,7 +17683,14 @@ then :
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stddef.h>
+/* On FreeBSD 12.0/x86, max_align_t defined by <stddef.h> has
+               the correct alignment with the default (wrong) definition of
+               _Alignof, but a wrong alignment as soon as we activate an
+               ISO C compliant _Alignof definition.  */
+            #if ((defined __GNUC__ && 4 <= __GNUC__) || defined __clang__) && !defined __cplusplus
+             #define _Alignof(type) __builtin_offsetof (struct { char __a; type __b; }, __b)
+            #endif
+            #include <stddef.h>
             unsigned int s = sizeof (max_align_t);
             #if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__
             int check1[2 * (__alignof__ (double) <= __alignof__ (max_align_t)) - 1];
@@ -16192,6 +17767,41 @@ printf "%s\n" "$gl_cv_decl_null_works" >&6; }
     GL_GENERATE_STDDEF_H=true
   fi
 
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for unreachable" >&5
+printf %s "checking for unreachable... " >&6; }
+if test ${gl_cv_func_unreachable+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stddef.h>
+
+int
+main (void)
+{
+unreachable ();
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  gl_cv_func_unreachable=yes
+else $as_nop
+  gl_cv_func_unreachable=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_unreachable" >&5
+printf "%s\n" "$gl_cv_func_unreachable" >&6; }
+  if test $gl_cv_func_unreachable = no; then
+    GL_GENERATE_STDDEF_H=true
+  fi
+
   if $GL_GENERATE_STDDEF_H; then
 
 
@@ -16223,7 +17833,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -16278,10 +17888,25 @@ else $as_nop
 fi
 printf "%s\n" "#define HAVE_DECL_FCLOSEALL $ac_have_decl" >>confdefs.h
 
+ac_fn_check_decl "$LINENO" "getw" "ac_cv_have_decl_getw" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_getw" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_GETW $ac_have_decl" >>confdefs.h
 
+ac_fn_check_decl "$LINENO" "putw" "ac_cv_have_decl_putw" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_putw" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_PUTW $ac_have_decl" >>confdefs.h
 
 
-  printf "%s\n" "#define __USE_MINGW_ANSI_STDIO 1" >>confdefs.h
 
 
 
@@ -16313,7 +17938,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -16412,10 +18037,22 @@ printf "%s\n" "#define GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU 1" >>confdefs.h
 
 
 
+
+
   if test $ac_cv_have_decl_fcloseall = no; then
     HAVE_DECL_FCLOSEALL=0
   fi
 
+
+  if test $ac_cv_have_decl_getw = no; then
+    HAVE_DECL_GETW=0
+  fi
+
+
+  if test $ac_cv_have_decl_putw = no; then
+    HAVE_DECL_PUTW=0
+  fi
+
 ac_fn_check_decl "$LINENO" "ecvt" "ac_cv_have_decl_ecvt" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
 if test "x$ac_cv_have_decl_ecvt" = xyes
 then :
@@ -16475,7 +18112,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -16525,6 +18162,62 @@ printf "%s\n" "$gl_cv_next_stdlib_h" >&6; }
 
 
 
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether MB_CUR_MAX is correct" >&5
+printf %s "checking whether MB_CUR_MAX is correct... " >&6; }
+if test ${gl_cv_macro_MB_CUR_MAX_good+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+                  case "$host_os" in
+                  # Guess no on Solaris.
+        solaris*) gl_cv_macro_MB_CUR_MAX_good="guessing no" ;;
+                  # Guess yes otherwise.
+        *)        gl_cv_macro_MB_CUR_MAX_good="guessing yes" ;;
+      esac
+      if test $LOCALE_FR_UTF8 != none; then
+        if test "$cross_compiling" = yes
+then :
+  :
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <locale.h>
+#include <stdlib.h>
+int main ()
+{
+  int result = 0;
+  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
+    {
+      if (MB_CUR_MAX < 4)
+        result |= 1;
+    }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_macro_MB_CUR_MAX_good=yes
+else $as_nop
+  gl_cv_macro_MB_CUR_MAX_good=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+      fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_macro_MB_CUR_MAX_good" >&5
+printf "%s\n" "$gl_cv_macro_MB_CUR_MAX_good" >&6; }
+  case "$gl_cv_macro_MB_CUR_MAX_good" in
+    *yes) ;;
+    *) REPLACE_MB_CUR_MAX=1 ;;
+  esac
+
+
   if test $ac_cv_have_decl_ecvt = no; then
     HAVE_DECL_ECVT=0
   fi
@@ -16562,14 +18255,14 @@ else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                        # Guess yes on glibc systems.
-         *-gnu* | gnu*) gl_cv_func_strerror_0_works="guessing yes" ;;
-                        # Guess yes on musl systems.
-         *-musl*)       gl_cv_func_strerror_0_works="guessing yes" ;;
-                        # Guess yes on native Windows.
-         mingw*)        gl_cv_func_strerror_0_works="guessing yes" ;;
-                        # If we don't know, obey --enable-cross-guesses.
-         *)             gl_cv_func_strerror_0_works="$gl_cross_guess_normal" ;;
+                             # Guess yes on glibc systems.
+         *-gnu* | gnu*)      gl_cv_func_strerror_0_works="guessing yes" ;;
+                             # Guess yes on musl systems.
+         *-musl* | midipix*) gl_cv_func_strerror_0_works="guessing yes" ;;
+                             # Guess yes on native Windows.
+         mingw* | windows*)  gl_cv_func_strerror_0_works="guessing yes" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+         *)                  gl_cv_func_strerror_0_works="$gl_cross_guess_normal" ;;
        esac
 
 else $as_nop
@@ -16650,7 +18343,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -16736,7 +18429,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -16816,12 +18509,12 @@ else $as_nop
 then :
 
         case "$host_os" in
-                    # Guess no on Solaris.
-          solaris*) gl_cv_func_strncat_works="guessing no" ;;
-                    # Guess yes on native Windows.
-          mingw*)   gl_cv_func_strncat_works="guessing yes" ;;
-                    # Guess yes otherwise.
-          *)        gl_cv_func_strncat_works="guessing yes" ;;
+                             # Guess no on Solaris.
+          solaris*)          gl_cv_func_strncat_works="guessing no" ;;
+                             # Guess yes on native Windows.
+          mingw* | windows*) gl_cv_func_strncat_works="guessing yes" ;;
+                             # Guess yes otherwise.
+          *)                 gl_cv_func_strncat_works="guessing yes" ;;
         esac
 
 else $as_nop
@@ -16930,7 +18623,6 @@ printf "%s\n" "$gl_cv_func_strncat_works" >&6; }
 
 
 
-
 printf "%s\n" "#define _USE_STD_STAT 1" >>confdefs.h
 
 
@@ -16964,7 +18656,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -17028,17 +18720,17 @@ printf "%s\n" "$gl_cv_next_sys_types_h" >&6; }
   HAVE_TIMESPEC_GET=1;
   HAVE_TIMESPEC_GETRES=1;
     HAVE_TIMEZONE_T=0;
-        REPLACE_CTIME=GNULIB_PORTCHECK;
-  REPLACE_LOCALTIME_R=GNULIB_PORTCHECK;
-  REPLACE_MKTIME=GNULIB_PORTCHECK;
-  REPLACE_NANOSLEEP=GNULIB_PORTCHECK;
-  REPLACE_STRFTIME=GNULIB_PORTCHECK;
-  REPLACE_TIMEGM=GNULIB_PORTCHECK;
-  REPLACE_TZSET=GNULIB_PORTCHECK;
-
-      : ${GNULIB_GETTIMEOFDAY=0};
-        REPLACE_GMTIME=0;
+  REPLACE_CTIME=0;
+  REPLACE_GMTIME=0;
   REPLACE_LOCALTIME=0;
+  REPLACE_LOCALTIME_R=0;
+  REPLACE_MKTIME=0;
+  REPLACE_NANOSLEEP=0;
+  REPLACE_STRFTIME=0;
+  REPLACE_TIME=0;
+  REPLACE_TIMEGM=0;
+  REPLACE_TIMESPEC_GET=0;
+  REPLACE_TZSET=0;
 
 
 
@@ -17212,7 +18904,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -17258,6 +18950,10 @@ printf "%s\n" "$gl_cv_next_time_h" >&6; }
 
 
 
+
+
+
+
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for TIME_UTC in <time.h>" >&5
 printf %s "checking for TIME_UTC in <time.h>... " >&6; }
 if test ${gl_cv_time_h_has_TIME_UTC+y}
@@ -17319,6 +19015,10 @@ printf "%s\n" "$gl_cv_time_h_has_TIME_UTC" >&6; }
 
 
 
+  GL_GNULIB_TIME=0
+
+
+
   GL_GNULIB_TIMEGM=0
 
 
@@ -17393,7 +19093,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -17515,7 +19215,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -17582,11 +19282,11 @@ else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                   # Guess yes on musl systems.
-          *-musl*) gl_cv_func_working_utimes="guessing yes" ;;
-                   # Guess no on native Windows.
-          mingw*)  gl_cv_func_working_utimes="guessing no" ;;
-          *)       gl_cv_func_working_utimes="$gl_cross_guess_normal" ;;
+                             # Guess yes on musl systems.
+          *-musl*)           gl_cv_func_working_utimes="guessing yes" ;;
+                             # Guess no on native Windows.
+          mingw* | windows*) gl_cv_func_working_utimes="guessing no" ;;
+          *)                 gl_cv_func_working_utimes="$gl_cross_guess_normal" ;;
         esac
 
 else $as_nop
@@ -17741,10 +19441,6 @@ printf "%s\n" "#define HAVE_WORKING_UTIMES 1" >>confdefs.h
 
 
 
-
-
-
-
   if test $ac_cv_header_features_h = yes; then
     HAVE_FEATURES_H=1
   else
@@ -17893,7 +19589,7 @@ then :
                                  # Guess yes on glibc systems.
            *-gnu* | gnu*)        gl_cv_func_snprintf_retval_c99="guessing yes";;
                                  # Guess yes on musl systems.
-           *-musl*)              gl_cv_func_snprintf_retval_c99="guessing yes";;
+           *-musl* | midipix*)   gl_cv_func_snprintf_retval_c99="guessing yes";;
                                  # Guess yes on FreeBSD >= 5.
            freebsd[1-4].*)       gl_cv_func_snprintf_retval_c99="guessing no";;
            freebsd* | kfreebsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
@@ -17920,7 +19616,8 @@ then :
                                  # Guess yes on Android.
            linux*-android*)      gl_cv_func_snprintf_retval_c99="guessing yes";;
                                  # Guess yes on MSVC, no on mingw.
-           mingw*)               cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+           windows*-msvc*)       gl_cv_func_snprintf_retval_c99="guessing yes" ;;
+           mingw* | windows*)    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #ifdef _MSC_VER
@@ -18007,7 +19704,7 @@ then :
                                  # Guess yes on glibc systems.
            *-gnu* | gnu*)        gl_cv_func_snprintf_truncation_c99="guessing yes";;
                                  # Guess yes on musl systems.
-           *-musl*)              gl_cv_func_snprintf_truncation_c99="guessing yes";;
+           *-musl* | midipix*)   gl_cv_func_snprintf_truncation_c99="guessing yes";;
                                  # Guess yes on FreeBSD >= 5.
            freebsd[1-4].*)       gl_cv_func_snprintf_truncation_c99="guessing no";;
            freebsd* | kfreebsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
@@ -18043,7 +19740,7 @@ then :
                                  # Guess yes on Android.
            linux*-android*)      gl_cv_func_snprintf_truncation_c99="guessing yes";;
                                  # Guess no on native Windows.
-           mingw*)               gl_cv_func_snprintf_truncation_c99="guessing no";;
+           mingw* | windows*)    gl_cv_func_snprintf_truncation_c99="guessing no";;
                                  # If we don't know, obey --enable-cross-guesses.
            *)                    gl_cv_func_snprintf_truncation_c99="$gl_cross_guess_normal";;
          esac
@@ -18097,6 +19794,16 @@ printf "%s\n" "$gl_cv_func_snprintf_truncation_c99" >&6; }
 
 
 
+  ac_fn_c_check_func "$LINENO" "wcslen" "ac_cv_func_wcslen"
+if test "x$ac_cv_func_wcslen" = xyes
+then :
+  printf "%s\n" "#define HAVE_WCSLEN 1" >>confdefs.h
+
+fi
+
+
+
+
   ac_fn_c_check_func "$LINENO" "snprintf" "ac_cv_func_snprintf"
 if test "x$ac_cv_func_snprintf" = xyes
 then :
@@ -18109,24 +19816,6 @@ then :
   printf "%s\n" "#define HAVE_STRNLEN 1" >>confdefs.h
 
 fi
-ac_fn_c_check_func "$LINENO" "wcslen" "ac_cv_func_wcslen"
-if test "x$ac_cv_func_wcslen" = xyes
-then :
-  printf "%s\n" "#define HAVE_WCSLEN 1" >>confdefs.h
-
-fi
-ac_fn_c_check_func "$LINENO" "wcsnlen" "ac_cv_func_wcsnlen"
-if test "x$ac_cv_func_wcsnlen" = xyes
-then :
-  printf "%s\n" "#define HAVE_WCSNLEN 1" >>confdefs.h
-
-fi
-ac_fn_c_check_func "$LINENO" "mbrtowc" "ac_cv_func_mbrtowc"
-if test "x$ac_cv_func_mbrtowc" = xyes
-then :
-  printf "%s\n" "#define HAVE_MBRTOWC 1" >>confdefs.h
-
-fi
 ac_fn_c_check_func "$LINENO" "wcrtomb" "ac_cv_func_wcrtomb"
 if test "x$ac_cv_func_wcrtomb" = xyes
 then :
@@ -18145,7 +19834,6 @@ fi
 printf "%s\n" "#define HAVE_DECL__SNPRINTF $ac_have_decl" >>confdefs.h
 
 
-
   case "$gl_cv_func_snprintf_retval_c99" in
     *yes)
 
@@ -18166,6 +19854,7 @@ printf "%s\n" "#define HAVE_SNPRINTF_TRUNCATION_C99 1" >>confdefs.h
 
 
 
+
      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether printf supports size specifiers as in C99" >&5
 printf %s "checking whether printf supports size specifiers as in C99... " >&6; }
 if test ${gl_cv_func_printf_sizes_c99+y}
@@ -18180,7 +19869,7 @@ then :
                                  # Guess yes on glibc systems.
            *-gnu* | gnu*)        gl_cv_func_printf_sizes_c99="guessing yes";;
                                  # Guess yes on musl systems.
-           *-musl*)              gl_cv_func_printf_sizes_c99="guessing yes";;
+           *-musl* | midipix*)   gl_cv_func_printf_sizes_c99="guessing yes";;
                                  # Guess yes on FreeBSD >= 5.
            freebsd[1-4].*)       gl_cv_func_printf_sizes_c99="guessing no";;
            freebsd* | kfreebsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
@@ -18202,7 +19891,8 @@ then :
                                  # Guess yes on Android.
            linux*-android*)      gl_cv_func_printf_sizes_c99="guessing yes";;
                                  # Guess yes on MSVC, no on mingw.
-           mingw*)               cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+           windows*-msvc*)       gl_cv_func_printf_sizes_c99="guessing yes" ;;
+           mingw* | windows*)    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #ifdef _MSC_VER
@@ -18282,6 +19972,105 @@ printf "%s\n" "$gl_cv_func_printf_sizes_c99" >&6; }
 
 
 
+
+
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether printf supports size specifiers as in C23" >&5
+printf %s "checking whether printf supports size specifiers as in C23... " >&6; }
+if test ${gl_cv_func_printf_sizes_c23+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+
+         case "$host_os" in
+                               # Guess no on glibc systems.
+           *-gnu* | gnu*)      gl_cv_func_printf_sizes_c23="guessing no";;
+                               # Guess no on musl systems.
+           *-musl* | midipix*) gl_cv_func_printf_sizes_c23="guessing no";;
+                               # Guess no on Android.
+           linux*-android*)    gl_cv_func_printf_sizes_c23="guessing no";;
+                               # Guess no on native Windows.
+           mingw* | windows*)  gl_cv_func_printf_sizes_c23="guessing no";;
+                               # If we don't know, obey --enable-cross-guesses.
+           *)                  gl_cv_func_printf_sizes_c23="$gl_cross_guess_normal";;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#if HAVE_STDINT_H_WITH_UINTMAX
+# include <stdint.h>
+#endif
+#if HAVE_INTTYPES_H_WITH_UINTMAX
+# include <inttypes.h>
+#endif
+static char buf[100];
+int main ()
+{
+  int result = 0;
+  buf[0] = '\0';
+  if (sprintf (buf, "%w8u %d", (uint8_t) 123, 33, 44, 55) < 0
+      || strcmp (buf, "123 33") != 0)
+    result |= 1;
+  buf[0] = '\0';
+  if (sprintf (buf, "%wf8u %d", (uint_fast8_t) 123, 33, 44, 55) < 0
+      || strcmp (buf, "123 33") != 0)
+    result |= 1;
+  buf[0] = '\0';
+  if (sprintf (buf, "%w16u %d", (uint16_t) 12345, 33, 44, 55) < 0
+      || strcmp (buf, "12345 33") != 0)
+    result |= 2;
+  buf[0] = '\0';
+  if (sprintf (buf, "%wf16u %d", (uint_fast16_t) 12345, 33, 44, 55) < 0
+      || strcmp (buf, "12345 33") != 0)
+    result |= 2;
+  buf[0] = '\0';
+  if (sprintf (buf, "%w32u %d", (uint32_t) 12345671, 33, 44, 55) < 0
+      || strcmp (buf, "12345671 33") != 0)
+    result |= 4;
+  buf[0] = '\0';
+  if (sprintf (buf, "%wf32u %d", (uint_fast32_t) 12345671, 33, 44, 55) < 0
+      || strcmp (buf, "12345671 33") != 0)
+    result |= 4;
+#if HAVE_STDINT_H_WITH_UINTMAX || HAVE_INTTYPES_H_WITH_UINTMAX
+  buf[0] = '\0';
+  if (sprintf (buf, "%w64u %d", (uint64_t) 12345671, 33, 44, 55) < 0
+      || strcmp (buf, "12345671 33") != 0)
+    result |= 8;
+  buf[0] = '\0';
+  if (sprintf (buf, "%wf64u %d", (uint_fast64_t) 12345671, 33, 44, 55) < 0
+      || strcmp (buf, "12345671 33") != 0)
+    result |= 8;
+#else
+  result |= 8;
+#endif
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_printf_sizes_c23=yes
+else $as_nop
+  gl_cv_func_printf_sizes_c23=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_printf_sizes_c23" >&5
+printf "%s\n" "$gl_cv_func_printf_sizes_c23" >&6; }
+
+
+
      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether printf supports 'long double' arguments" >&5
 printf %s "checking whether printf supports 'long double' arguments... " >&6; }
 if test ${gl_cv_func_printf_long_double+y}
@@ -18292,12 +20081,13 @@ else $as_nop
       if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                            # Guess no on BeOS.
-           beos*)           gl_cv_func_printf_long_double="guessing no";;
-                            # Guess yes on Android.
-           linux*-android*) gl_cv_func_printf_long_double="guessing yes";;
-                            # Guess yes on MSVC, no on mingw.
-           mingw*)          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+                              # Guess no on BeOS.
+           beos*)             gl_cv_func_printf_long_double="guessing no";;
+                              # Guess yes on Android.
+           linux*-android*)   gl_cv_func_printf_long_double="guessing yes";;
+                              # Guess yes on MSVC, no on mingw.
+           windows*-msvc*)    gl_cv_func_printf_long_double="guessing yes" ;;
+           mingw* | windows*) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #ifdef _MSC_VER
@@ -18314,8 +20104,8 @@ else $as_nop
 fi
 rm -rf conftest*
 
-                            ;;
-           *)               gl_cv_func_printf_long_double="guessing yes";;
+                              ;;
+           *)                 gl_cv_func_printf_long_double="guessing yes";;
          esac
 
 else $as_nop
@@ -18374,7 +20164,7 @@ then :
                                  # Guess yes on glibc systems.
            *-gnu* | gnu*)        gl_cv_func_printf_infinite="guessing yes";;
                                  # Guess yes on musl systems.
-           *-musl*)              gl_cv_func_printf_infinite="guessing yes";;
+           *-musl* | midipix*)   gl_cv_func_printf_infinite="guessing yes";;
                                  # Guess yes on FreeBSD >= 6.
            freebsd[1-5].*)       gl_cv_func_printf_infinite="guessing no";;
            freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";;
@@ -18397,7 +20187,8 @@ then :
                                  # Guess no on Android.
            linux*-android*)      gl_cv_func_printf_infinite="guessing no";;
                                  # Guess yes on MSVC, no on mingw.
-           mingw*)               cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+           windows*-msvc*)       gl_cv_func_printf_infinite="guessing yes" ;;
+           mingw* | windows*)    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #ifdef _MSC_VER
@@ -18534,7 +20325,7 @@ then :
                                          # Guess yes on glibc systems.
                    *-gnu* | gnu*)        gl_cv_func_printf_infinite_long_double="guessing yes";;
                                          # Guess yes on musl systems.
-                   *-musl*)              gl_cv_func_printf_infinite_long_double="guessing yes";;
+                   *-musl* | midipix*)   gl_cv_func_printf_infinite_long_double="guessing yes";;
                                          # Guess yes on FreeBSD >= 6.
                    freebsd[1-5].*)       gl_cv_func_printf_infinite_long_double="guessing no";;
                    freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
@@ -18548,7 +20339,8 @@ then :
                                          # Guess no on Android.
                    linux*-android*)      gl_cv_func_printf_infinite_long_double="guessing no";;
                                          # Guess yes on MSVC, no on mingw.
-                   mingw*)               cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+                   windows*-msvc*)       gl_cv_func_printf_infinite_long_double="guessing yes" ;;
+                   mingw* | windows*)    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #ifdef _MSC_VER
@@ -18895,11 +20687,11 @@ rm -rf conftest*
 
              ;;
                                  # Guess yes on musl systems.
-           *-musl*)              gl_cv_func_printf_directive_a="guessing yes";;
+           *-musl* | midipix*)   gl_cv_func_printf_directive_a="guessing yes";;
                                  # Guess no on Android.
            linux*-android*)      gl_cv_func_printf_directive_a="guessing no";;
                                  # Guess no on native Windows.
-           mingw*)               gl_cv_func_printf_directive_a="guessing no";;
+           mingw* | windows*)    gl_cv_func_printf_directive_a="guessing no";;
                                  # If we don't know, obey --enable-cross-guesses.
            *)                    gl_cv_func_printf_directive_a="$gl_cross_guess_normal";;
          esac
@@ -18981,6 +20773,83 @@ printf "%s\n" "$gl_cv_func_printf_directive_a" >&6; }
 
 
 
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether printf supports the 'b' directive" >&5
+printf %s "checking whether printf supports the 'b' directive... " >&6; }
+if test ${gl_cv_func_printf_directive_b+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+
+         case "$host_os" in
+                               # Guess yes on glibc >= 2.35 systems.
+           *-gnu* | gnu*)
+             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+               #include <features.h>
+               #ifdef __GNU_LIBRARY__
+                #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 35) || (__GLIBC__ > 2)
+                 Lucky user
+                #endif
+               #endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "Lucky" >/dev/null 2>&1
+then :
+  gl_cv_func_printf_directive_uppercase_b="guessing yes"
+else $as_nop
+  gl_cv_func_printf_directive_uppercase_b="guessing no"
+fi
+rm -rf conftest*
+
+             ;;
+                               # Guess no on musl systems.
+           *-musl* | midipix*) gl_cv_func_printf_directive_b="guessing no";;
+                               # Guess no on Android.
+           linux*-android*)    gl_cv_func_printf_directive_b="guessing no";;
+                               # Guess no on native Windows.
+           mingw* | windows*)  gl_cv_func_printf_directive_b="guessing no";;
+                               # If we don't know, obey --enable-cross-guesses.
+           *)                  gl_cv_func_printf_directive_b="$gl_cross_guess_normal";;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+  int result = 0;
+  if (sprintf (buf, "%b %d", 12345, 33, 44, 55) < 0
+      || strcmp (buf, "11000000111001 33") != 0)
+    result |= 1;
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_printf_directive_b=yes
+else $as_nop
+  gl_cv_func_printf_directive_b=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_printf_directive_b" >&5
+printf "%s\n" "$gl_cv_func_printf_directive_b" >&6; }
+
+
+
      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether printf supports the 'F' directive" >&5
 printf %s "checking whether printf supports the 'F' directive... " >&6; }
 if test ${gl_cv_func_printf_directive_f+y}
@@ -18995,7 +20864,7 @@ then :
                                  # Guess yes on glibc systems.
            *-gnu* | gnu*)        gl_cv_func_printf_directive_f="guessing yes";;
                                  # Guess yes on musl systems.
-           *-musl*)              gl_cv_func_printf_directive_f="guessing yes";;
+           *-musl* | midipix*)   gl_cv_func_printf_directive_f="guessing yes";;
                                  # Guess yes on FreeBSD >= 6.
            freebsd[1-5].*)       gl_cv_func_printf_directive_f="guessing no";;
            freebsd* | kfreebsd*) gl_cv_func_printf_directive_f="guessing yes";;
@@ -19012,7 +20881,8 @@ then :
                                  # Guess no on Android.
            linux*-android*)      gl_cv_func_printf_directive_f="guessing no";;
                                  # Guess yes on MSVC, no on mingw.
-           mingw*)               cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+           windows*-msvc*)       gl_cv_func_printf_directive_f="guessing yes" ;;
+           mingw* | windows*)    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #ifdef _MSC_VER
@@ -19085,12 +20955,12 @@ else $as_nop
       if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                            # Guess no on glibc when _FORTIFY_SOURCE >= 2.
-           *-gnu* | gnu*)   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+                              # Guess no on glibc when _FORTIFY_SOURCE >= 2.
+           *-gnu* | gnu*)     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #if _FORTIFY_SOURCE >= 2
-                                    error fail
-                                   #endif
+                                      error fail
+                                     #endif
 
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
@@ -19100,12 +20970,12 @@ else $as_nop
   gl_cv_func_printf_directive_n="guessing no"
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-                            ;;
-                            # Guess no on Android.
-           linux*-android*) gl_cv_func_printf_directive_n="guessing no";;
-                            # Guess no on native Windows.
-           mingw*)          gl_cv_func_printf_directive_n="guessing no";;
-           *)               gl_cv_func_printf_directive_n="guessing yes";;
+                              ;;
+                              # Guess no on Android.
+           linux*-android*)   gl_cv_func_printf_directive_n="guessing no";;
+                              # Guess no on native Windows.
+           mingw* | windows*) gl_cv_func_printf_directive_n="guessing no";;
+           *)                 gl_cv_func_printf_directive_n="guessing yes";;
          esac
 
 else $as_nop
@@ -19176,18 +21046,18 @@ else $as_nop
 then :
 
          case "$host_os" in
-                            # Guess yes on OpenBSD >= 6.0.
-           openbsd[1-5].*)  gl_cv_func_printf_directive_ls="guessing no";;
-           openbsd*)        gl_cv_func_printf_directive_ls="guessing yes";;
-           irix*)           gl_cv_func_printf_directive_ls="guessing no";;
-           solaris*)        gl_cv_func_printf_directive_ls="guessing no";;
-           cygwin*)         gl_cv_func_printf_directive_ls="guessing no";;
-           beos* | haiku*)  gl_cv_func_printf_directive_ls="guessing no";;
-                            # Guess no on Android.
-           linux*-android*) gl_cv_func_printf_directive_ls="guessing no";;
-                            # Guess yes on native Windows.
-           mingw*)          gl_cv_func_printf_directive_ls="guessing yes";;
-           *)               gl_cv_func_printf_directive_ls="guessing yes";;
+                              # Guess yes on OpenBSD >= 6.0.
+           openbsd[1-5].*)    gl_cv_func_printf_directive_ls="guessing no";;
+           openbsd*)          gl_cv_func_printf_directive_ls="guessing yes";;
+           irix*)             gl_cv_func_printf_directive_ls="guessing no";;
+           solaris*)          gl_cv_func_printf_directive_ls="guessing no";;
+           cygwin*)           gl_cv_func_printf_directive_ls="guessing no";;
+           beos* | haiku*)    gl_cv_func_printf_directive_ls="guessing no";;
+                              # Guess no on Android.
+           linux*-android*)   gl_cv_func_printf_directive_ls="guessing no";;
+                              # Guess yes on native Windows.
+           mingw* | windows*) gl_cv_func_printf_directive_ls="guessing yes";;
+           *)                 gl_cv_func_printf_directive_ls="guessing yes";;
          esac
 
 else $as_nop
@@ -19255,6 +21125,61 @@ printf "%s\n" "$gl_cv_func_printf_directive_ls" >&6; }
 
 
 
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether printf supports the 'lc' directive correctly" >&5
+printf %s "checking whether printf supports the 'lc' directive correctly... " >&6; }
+if test ${gl_cv_func_printf_directive_lc+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+
+         case "$host_os" in
+                               # Guess no on musl libc.
+           *-musl* | midipix*) gl_cv_func_printf_directive_lc="guessing no";;
+                               # Guess yes otherwise.
+           *)                  gl_cv_func_printf_directive_lc="guessing yes";;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+#include <wchar.h>
+#include <string.h>
+int main ()
+{
+  int result = 0;
+  char buf[100];
+  /* This test fails on musl libc 1.2.4.  */
+  {
+    buf[0] = '\0';
+    if (sprintf (buf, "%lc%lc%lc", (wint_t) 'a', (wint_t) 0, (wint_t) 'z') < 0
+        || memcmp (buf, "a\0z", 4) != 0)
+      result |= 1;
+  }
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_printf_directive_lc=yes
+else $as_nop
+  gl_cv_func_printf_directive_lc=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_printf_directive_lc" >&5
+printf "%s\n" "$gl_cv_func_printf_directive_lc" >&6; }
+
+
+
      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether printf supports POSIX/XSI format strings with positions" >&5
 printf %s "checking whether printf supports POSIX/XSI format strings with positions... " >&6; }
 if test ${gl_cv_func_printf_positions+y}
@@ -19267,13 +21192,17 @@ then :
 
          case "$host_os" in
            netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*)
-                            gl_cv_func_printf_positions="guessing no";;
-           beos*)           gl_cv_func_printf_positions="guessing no";;
-                            # Guess yes on Android.
-           linux*-android*) gl_cv_func_printf_positions="guessing yes";;
-                            # Guess no on native Windows.
-           mingw* | pw*)    gl_cv_func_printf_positions="guessing no";;
-           *)               gl_cv_func_printf_positions="guessing yes";;
+             gl_cv_func_printf_positions="guessing no";;
+           beos*)
+             gl_cv_func_printf_positions="guessing no";;
+             # Guess yes on Android.
+           linux*-android*)
+             gl_cv_func_printf_positions="guessing yes";;
+             # Guess no on native Windows.
+           mingw* | windows* | pw*)
+             gl_cv_func_printf_positions="guessing no";;
+           *)
+             gl_cv_func_printf_positions="guessing yes";;
          esac
 
 else $as_nop
@@ -19320,13 +21249,13 @@ else $as_nop
 then :
 
          case "$host_os" in
-           cygwin*)         gl_cv_func_printf_flag_grouping="guessing no";;
-           netbsd*)         gl_cv_func_printf_flag_grouping="guessing no";;
-                            # Guess no on Android.
-           linux*-android*) gl_cv_func_printf_flag_grouping="guessing no";;
-                            # Guess no on native Windows.
-           mingw* | pw*)    gl_cv_func_printf_flag_grouping="guessing no";;
-           *)               gl_cv_func_printf_flag_grouping="guessing yes";;
+           cygwin*)                 gl_cv_func_printf_flag_grouping="guessing no";;
+           netbsd*)                 gl_cv_func_printf_flag_grouping="guessing no";;
+                                    # Guess no on Android.
+           linux*-android*)         gl_cv_func_printf_flag_grouping="guessing no";;
+                                    # Guess no on native Windows.
+           mingw* | windows* | pw*) gl_cv_func_printf_flag_grouping="guessing no";;
+           *)                       gl_cv_func_printf_flag_grouping="guessing yes";;
          esac
 
 else $as_nop
@@ -19372,16 +21301,16 @@ else $as_nop
 then :
 
          case "$host_os" in
-                            # Guess yes on HP-UX 11.
-           hpux11*)         gl_cv_func_printf_flag_leftadjust="guessing yes";;
-                            # Guess no on HP-UX 10 and older.
-           hpux*)           gl_cv_func_printf_flag_leftadjust="guessing no";;
-                            # Guess yes on Android.
-           linux*-android*) gl_cv_func_printf_flag_leftadjust="guessing yes";;
-                            # Guess yes on native Windows.
-           mingw*)          gl_cv_func_printf_flag_leftadjust="guessing yes";;
-                            # Guess yes otherwise.
-           *)               gl_cv_func_printf_flag_leftadjust="guessing yes";;
+                              # Guess yes on HP-UX 11.
+           hpux11*)           gl_cv_func_printf_flag_leftadjust="guessing yes";;
+                              # Guess no on HP-UX 10 and older.
+           hpux*)             gl_cv_func_printf_flag_leftadjust="guessing no";;
+                              # Guess yes on Android.
+           linux*-android*)   gl_cv_func_printf_flag_leftadjust="guessing yes";;
+                              # Guess yes on native Windows.
+           mingw* | windows*) gl_cv_func_printf_flag_leftadjust="guessing yes";;
+                              # Guess yes otherwise.
+           *)                 gl_cv_func_printf_flag_leftadjust="guessing yes";;
          esac
 
 else $as_nop
@@ -19428,18 +21357,18 @@ else $as_nop
 then :
 
          case "$host_os" in
-                            # Guess yes on glibc systems.
-           *-gnu* | gnu*)   gl_cv_func_printf_flag_zero="guessing yes";;
-                            # Guess yes on musl systems.
-           *-musl*)         gl_cv_func_printf_flag_zero="guessing yes";;
-                            # Guess yes on BeOS.
-           beos*)           gl_cv_func_printf_flag_zero="guessing yes";;
-                            # Guess no on Android.
-           linux*-android*) gl_cv_func_printf_flag_zero="guessing no";;
-                            # Guess no on native Windows.
-           mingw*)          gl_cv_func_printf_flag_zero="guessing no";;
-                            # If we don't know, obey --enable-cross-guesses.
-           *)               gl_cv_func_printf_flag_zero="$gl_cross_guess_normal";;
+                               # Guess yes on glibc systems.
+           *-gnu* | gnu*)      gl_cv_func_printf_flag_zero="guessing yes";;
+                               # Guess yes on musl systems.
+           *-musl* | midipix*) gl_cv_func_printf_flag_zero="guessing yes";;
+                               # Guess yes on BeOS.
+           beos*)              gl_cv_func_printf_flag_zero="guessing yes";;
+                               # Guess no on Android.
+           linux*-android*)    gl_cv_func_printf_flag_zero="guessing no";;
+                               # Guess no on native Windows.
+           mingw* | windows*)  gl_cv_func_printf_flag_zero="guessing no";;
+                               # If we don't know, obey --enable-cross-guesses.
+           *)                  gl_cv_func_printf_flag_zero="$gl_cross_guess_normal";;
          esac
 
 else $as_nop
@@ -19476,6 +21405,57 @@ printf "%s\n" "$gl_cv_func_printf_flag_zero" >&6; }
 
 
 
+     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether printf supports the alternative flag with a zero precision" >&5
+printf %s "checking whether printf supports the alternative flag with a zero precision... " >&6; }
+if test ${gl_cv_func_printf_flag_alt_precision_zero+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+      if test "$cross_compiling" = yes
+then :
+
+         case "$host_os" in
+           # Guess no only on macOS 10..12 systems.
+           darwin[0-9] | darwin[0-9].* | \
+           darwin1[0-9] | darwin1[0-9].* | \
+           darwin2[0-1] | darwin2[0-1].*)
+                    gl_cv_func_printf_flag_alt_precision_zero="guessing no" ;;
+           darwin*) gl_cv_func_printf_flag_alt_precision_zero="guessing yes" ;;
+           *)       gl_cv_func_printf_flag_alt_precision_zero="guessing yes" ;;
+         esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdio.h>
+static char buf[10];
+int main ()
+{
+  int result = 0;
+  if (sprintf (buf, "%#.0x %d", 0, 33, 44) > 0 + 3)
+    result |= 1;
+  return result;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_printf_flag_alt_precision_zero=yes
+else $as_nop
+  gl_cv_func_printf_flag_alt_precision_zero=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_printf_flag_alt_precision_zero" >&5
+printf "%s\n" "$gl_cv_func_printf_flag_alt_precision_zero" >&6; }
+
+
+
      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether printf supports large precisions" >&5
 printf %s "checking whether printf supports large precisions... " >&6; }
 if test ${gl_cv_func_printf_precision+y}
@@ -19488,12 +21468,12 @@ then :
 
          case "$host_os" in
            # Guess no only on Solaris, native Windows, and BeOS systems.
-           solaris*)        gl_cv_func_printf_precision="guessing no" ;;
-           mingw* | pw*)    gl_cv_func_printf_precision="guessing no" ;;
-           beos*)           gl_cv_func_printf_precision="guessing no" ;;
-                            # Guess yes on Android.
-           linux*-android*) gl_cv_func_printf_precision="guessing yes" ;;
-           *)               gl_cv_func_printf_precision="guessing yes" ;;
+           solaris*)                gl_cv_func_printf_precision="guessing no" ;;
+           mingw* | windows* | pw*) gl_cv_func_printf_precision="guessing no" ;;
+           beos*)                   gl_cv_func_printf_precision="guessing no" ;;
+                                    # Guess yes on Android.
+           linux*-android*)         gl_cv_func_printf_precision="guessing yes" ;;
+           *)                       gl_cv_func_printf_precision="guessing yes" ;;
          esac
 
 else $as_nop
@@ -19773,6 +21753,111 @@ printf "%s\n" "$gl_cv_func_printf_enomem" >&6; }
 
 
 
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+  gl_cv_func_vasprintf_posix=no
+  ac_fn_c_check_func "$LINENO" "vasprintf" "ac_cv_func_vasprintf"
+if test "x$ac_cv_func_vasprintf" = xyes
+then :
+  printf "%s\n" "#define HAVE_VASPRINTF 1" >>confdefs.h
+
+fi
+
+  case "$gl_cv_func_printf_sizes_c99" in
+    *yes)
+      case "$gl_cv_func_printf_sizes_c23" in
+        *yes)
+          case "$gl_cv_func_printf_long_double" in
+            *yes)
+              case "$gl_cv_func_printf_infinite" in
+                *yes)
+                  case "$gl_cv_func_printf_infinite_long_double" in
+                    *yes)
+                      case "$gl_cv_func_printf_directive_a" in
+                        *yes)
+                          case "$gl_cv_func_printf_directive_b" in
+                            *yes)
+                              case "$gl_cv_func_printf_directive_f" in
+                                *yes)
+                                  case "$gl_cv_func_printf_directive_n" in
+                                    *yes)
+                                      case "$gl_cv_func_printf_directive_ls" in
+                                        *yes)
+                                          case "$gl_cv_func_printf_directive_lc" in
+                                            *yes)
+                                              case "$gl_cv_func_printf_positions" in
+                                                *yes)
+                                                  case "$gl_cv_func_printf_flag_grouping" in
+                                                    *yes)
+                                                      case "$gl_cv_func_printf_flag_leftadjust" in
+                                                        *yes)
+                                                          case "$gl_cv_func_printf_flag_zero" in
+                                                            *yes)
+                                                              case "$gl_cv_func_printf_flag_alt_precision_zero" in
+                                                                *yes)
+                                                                  case "$gl_cv_func_printf_precision" in
+                                                                    *yes)
+                                                                      case "$gl_cv_func_printf_enomem" in
+                                                                        *yes)
+                                                                          if test $ac_cv_func_vasprintf = yes; then
+                                                                            # vasprintf exists and is
+                                                                            # already POSIX compliant.
+                                                                            gl_cv_func_vasprintf_posix=yes
+                                                                          fi
+                                                                          ;;
+                                                                      esac
+                                                                      ;;
+                                                                  esac
+                                                                  ;;
+                                                              esac
+                                                              ;;
+                                                          esac
+                                                          ;;
+                                                      esac
+                                                      ;;
+                                                  esac
+                                                  ;;
+                                              esac
+                                              ;;
+                                          esac
+                                          ;;
+                                      esac
+                                      ;;
+                                  esac
+                                  ;;
+                              esac
+                              ;;
+                          esac
+                          ;;
+                      esac
+                      ;;
+                  esac
+                  ;;
+              esac
+              ;;
+          esac
+          ;;
+      esac
+      ;;
+  esac
+
+
+
   case "$gl_cv_func_printf_long_double" in
     *yes)
       ;;
@@ -19784,65 +21869,6 @@ printf "%s\n" "#define NEED_PRINTF_LONG_DOUBLE 1" >>confdefs.h
   esac
 
 
-    HAVE_BTOWC=1;
-  HAVE_MBSINIT=1;
-  HAVE_MBRTOWC=1;
-  HAVE_MBRLEN=1;
-  HAVE_MBSRTOWCS=1;
-  HAVE_MBSNRTOWCS=1;
-  HAVE_WCRTOMB=1;
-  HAVE_WCSRTOMBS=1;
-  HAVE_WCSNRTOMBS=1;
-  HAVE_WMEMCHR=1;
-  HAVE_WMEMCMP=1;
-  HAVE_WMEMCPY=1;
-  HAVE_WMEMMOVE=1;
-  HAVE_WMEMPCPY=1;
-  HAVE_WMEMSET=1;
-  HAVE_WCSLEN=1;
-  HAVE_WCSNLEN=1;
-  HAVE_WCSCPY=1;
-  HAVE_WCPCPY=1;
-  HAVE_WCSNCPY=1;
-  HAVE_WCPNCPY=1;
-  HAVE_WCSCAT=1;
-  HAVE_WCSNCAT=1;
-  HAVE_WCSCMP=1;
-  HAVE_WCSNCMP=1;
-  HAVE_WCSCASECMP=1;
-  HAVE_WCSNCASECMP=1;
-  HAVE_WCSCOLL=1;
-  HAVE_WCSXFRM=1;
-  HAVE_WCSDUP=1;
-  HAVE_WCSCHR=1;
-  HAVE_WCSRCHR=1;
-  HAVE_WCSCSPN=1;
-  HAVE_WCSSPN=1;
-  HAVE_WCSPBRK=1;
-  HAVE_WCSSTR=1;
-  HAVE_WCSTOK=1;
-  HAVE_WCSWIDTH=1;
-  HAVE_WCSFTIME=1;
-  HAVE_DECL_WCTOB=1;
-  HAVE_DECL_WCSDUP=1;
-  HAVE_DECL_WCWIDTH=1;
-  REPLACE_MBSTATE_T=0;
-  REPLACE_BTOWC=0;
-  REPLACE_WCTOB=0;
-  REPLACE_MBSINIT=0;
-  REPLACE_MBRTOWC=0;
-  REPLACE_MBRLEN=0;
-  REPLACE_MBSRTOWCS=0;
-  REPLACE_MBSNRTOWCS=0;
-  REPLACE_WCRTOMB=0;
-  REPLACE_WCSRTOMBS=0;
-  REPLACE_WCSNRTOMBS=0;
-  REPLACE_WCWIDTH=0;
-  REPLACE_WCSWIDTH=0;
-  REPLACE_WCSFTIME=0;
-  REPLACE_WCSTOK=0;
-
-
 
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether <wchar.h> uses 'inline' correctly" >&5
 printf %s "checking whether <wchar.h> uses 'inline' correctly... " >&6; }
@@ -19961,7 +21987,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -20049,176 +22075,6 @@ printf "%s\n" "#define HAVE_DECL_WCSDUP $ac_have_decl" >>confdefs.h
 
 
 
-  GL_GNULIB_BTOWC=0
-
-
-
-  GL_GNULIB_WCTOB=0
-
-
-
-  GL_GNULIB_MBSINIT=0
-
-
-
-  GL_GNULIB_MBRTOWC=0
-
-
-
-  GL_GNULIB_MBRLEN=0
-
-
-
-  GL_GNULIB_MBSRTOWCS=0
-
-
-
-  GL_GNULIB_MBSNRTOWCS=0
-
-
-
-  GL_GNULIB_WCRTOMB=0
-
-
-
-  GL_GNULIB_WCSRTOMBS=0
-
-
-
-  GL_GNULIB_WCSNRTOMBS=0
-
-
-
-  GL_GNULIB_WCWIDTH=0
-
-
-
-  GL_GNULIB_WMEMCHR=0
-
-
-
-  GL_GNULIB_WMEMCMP=0
-
-
-
-  GL_GNULIB_WMEMCPY=0
-
-
-
-  GL_GNULIB_WMEMMOVE=0
-
-
-
-  GL_GNULIB_WMEMPCPY=0
-
-
-
-  GL_GNULIB_WMEMSET=0
-
-
-
-  GL_GNULIB_WCSLEN=0
-
-
-
-  GL_GNULIB_WCSNLEN=0
-
-
-
-  GL_GNULIB_WCSCPY=0
-
-
-
-  GL_GNULIB_WCPCPY=0
-
-
-
-  GL_GNULIB_WCSNCPY=0
-
-
-
-  GL_GNULIB_WCPNCPY=0
-
-
-
-  GL_GNULIB_WCSCAT=0
-
-
-
-  GL_GNULIB_WCSNCAT=0
-
-
-
-  GL_GNULIB_WCSCMP=0
-
-
-
-  GL_GNULIB_WCSNCMP=0
-
-
-
-  GL_GNULIB_WCSCASECMP=0
-
-
-
-  GL_GNULIB_WCSNCASECMP=0
-
-
-
-  GL_GNULIB_WCSCOLL=0
-
-
-
-  GL_GNULIB_WCSXFRM=0
-
-
-
-  GL_GNULIB_WCSDUP=0
-
-
-
-  GL_GNULIB_WCSCHR=0
-
-
-
-  GL_GNULIB_WCSRCHR=0
-
-
-
-  GL_GNULIB_WCSCSPN=0
-
-
-
-  GL_GNULIB_WCSSPN=0
-
-
-
-  GL_GNULIB_WCSPBRK=0
-
-
-
-  GL_GNULIB_WCSSTR=0
-
-
-
-  GL_GNULIB_WCSTOK=0
-
-
-
-  GL_GNULIB_WCSWIDTH=0
-
-
-
-  GL_GNULIB_WCSFTIME=0
-
-
-
-  GL_GNULIB_MDA_WCSDUP=1
-
-
-
-
-
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler option to allow warnings" >&5
 printf %s "checking for C compiler option to allow warnings... " >&6; }
 if test ${gl_cv_cc_wallow+y}
@@ -20259,7 +22115,7 @@ printf "%s\n" "$gl_cv_cc_wallow" >&6; }
 
       GL_CFLAG_GNULIB_WARNINGS=''
   if test -n "$GL_CFLAG_ALLOW_WARNINGS"; then
-                                                                        cat > conftest.c <<\EOF
+                                                                            cat > conftest.c <<\EOF
       #if __GNUC__ >= 3 || (__clang_major__ + (__clang_minor__ >= 9) > 3)
       -Wno-cast-qual
       -Wno-conversion
@@ -20278,6 +22134,9 @@ printf "%s\n" "$gl_cv_cc_wallow" >&6; }
       #if __GNUC__ + (__GNUC_MINOR__ >= 8) > 4 || (__clang_major__ + (__clang_minor__ >= 9) > 3)
       -Wno-pedantic
       #endif
+      #if 3 < __clang_major__ + (9 <= __clang_minor__)
+      -Wno-tautological-constant-out-of-range-compare
+      #endif
       #if __GNUC__ + (__GNUC_MINOR__ >= 3) > 4 || (__clang_major__ + (__clang_minor__ >= 9) > 3)
       -Wno-sign-conversion
       -Wno-type-limits
@@ -20330,6 +22189,120 @@ fi
   gl_source_base_prefix=
 
 
+
+      case "$host_os" in
+    mingw* | windows*)
+      REPLACE_ACCESS=1
+      ;;
+    *)
+
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether access honors trailing slash" >&5
+printf %s "checking whether access honors trailing slash... " >&6; }
+if test ${gl_cv_func_access_slash_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  # Assume that if we have lstat, we can also check symlinks.
+         if test $ac_cv_func_lstat = yes; then
+           rm -rf conftest.f conftest.lnk
+           touch conftest.f || as_fn_error $? "cannot create temporary files" "$LINENO" 5
+           ln -s conftest.f conftest.lnk
+           if test "$cross_compiling" = yes
+then :
+               case "$host_os" in
+                                   # Guess yes on Linux systems.
+                linux-* | linux)   gl_cv_func_access_slash_works="guessing yes" ;;
+                                   # Guess yes on systems that emulate the Linux system calls.
+                midipix*)          gl_cv_func_access_slash_works="guessing yes" ;;
+                                   # Guess yes on glibc systems.
+                *-gnu*)            gl_cv_func_access_slash_works="guessing yes" ;;
+                                   # If we don't know, obey --enable-cross-guesses.
+                *)                 gl_cv_func_access_slash_works="$gl_cross_guess_normal" ;;
+              esac
+
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+                #include <unistd.h>
+
+int
+main (void)
+{
+int result = 0;
+                  if (access ("conftest.lnk/", R_OK) == 0)
+                    result |= 1;
+                  return result;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"
+then :
+  gl_cv_func_access_slash_works=yes
+else $as_nop
+  gl_cv_func_access_slash_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+           rm -rf conftest.f conftest.lnk
+         else
+           gl_cv_func_access_slash_works="guessing yes"
+         fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_access_slash_works" >&5
+printf "%s\n" "$gl_cv_func_access_slash_works" >&6; }
+      case "$gl_cv_func_access_slash_works" in
+        *yes) ;;
+        *)
+          REPLACE_ACCESS=1
+
+printf "%s\n" "#define ACCESS_TRAILING_SLASH_BUG 1" >>confdefs.h
+
+          ;;
+      esac
+      ;;
+  esac
+
+
+     if test $REPLACE_ACCESS = 1; then
+  GL_COND_OBJ_ACCESS_TRUE=
+  GL_COND_OBJ_ACCESS_FALSE='#'
+else
+  GL_COND_OBJ_ACCESS_TRUE='#'
+  GL_COND_OBJ_ACCESS_FALSE=
+fi
+:
+    if test -z "${GL_COND_OBJ_ACCESS_TRUE}" && test -z "${GL_COND_OBJ_ACCESS_FALSE}"; then
+    GL_COND_OBJ_ACCESS_TRUE='#'
+    GL_COND_OBJ_ACCESS_FALSE='#'
+  fi
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_ACCESS=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_ACCESS 1" >>confdefs.h
+
+
+
+
+
   if test $ac_cv_func_alloca_works = no; then
     :
   fi
@@ -20417,6 +22390,178 @@ fi
 
 
 
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for static_assert" >&5
+printf %s "checking for static_assert... " >&6; }
+if test ${gl_cv_static_assert+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  gl_save_CFLAGS=$CFLAGS
+     for gl_working in "yes, a keyword" "yes, an <assert.h> macro"; do
+      case $gl_working in #(
+  *assert.h*) :
+    CFLAGS="$gl_save_CFLAGS -DINCLUDE_ASSERT_H" ;; #(
+  *) :
+     ;;
+esac
+
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#if defined __clang__ && __STDC_VERSION__ < 202311
+             #pragma clang diagnostic error "-Wc2x-extensions"
+             #pragma clang diagnostic error "-Wc++1z-extensions"
+            #endif
+            #ifdef INCLUDE_ASSERT_H
+             #include <assert.h>
+            #endif
+            static_assert (2 + 2 == 4, "arithmetic does not work");
+            static_assert (2 + 2 == 4);
+
+int
+main (void)
+{
+
+            static_assert (sizeof (char) == 1, "sizeof does not work");
+            static_assert (sizeof (char) == 1);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_static_assert=$gl_working
+else $as_nop
+  gl_cv_static_assert=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+      CFLAGS=$gl_save_CFLAGS
+      test "$gl_cv_static_assert" != no && break
+     done
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_static_assert" >&5
+printf "%s\n" "$gl_cv_static_assert" >&6; }
+
+  GL_GENERATE_ASSERT_H=false
+  case $gl_cv_static_assert in #(
+  yes*keyword*) :
+
+printf "%s\n" "#define HAVE_C_STATIC_ASSERT 1" >>confdefs.h
+ ;; #(
+  no) :
+    GL_GENERATE_ASSERT_H=true
+
+
+
+
+
+
+
+
+     if test $gl_cv_have_include_next = yes; then
+       gl_cv_next_assert_h='<'assert.h'>'
+     else
+       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking absolute name of <assert.h>" >&5
+printf %s "checking absolute name of <assert.h>... " >&6; }
+if test ${gl_cv_next_assert_h+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+
+
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <assert.h>
+_ACEOF
+                case "$host_os" in
+    aix*) gl_absname_cpp="$ac_cpp -C" ;;
+    *)    gl_absname_cpp="$ac_cpp" ;;
+  esac
+
+  case "$host_os" in
+    mingw* | windows*)
+                                          gl_dirsep_regex='[/\\]'
+      ;;
+    *)
+      gl_dirsep_regex='\/'
+      ;;
+  esac
+      gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
+  gl_header_literal_regex=`echo 'assert.h' \
+                           | sed -e "$gl_make_literal_regex_sed"`
+  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
+      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
+      s|^/[^/]|//&|
+      p
+      q
+    }'
+
+        gl_cv_absolute_assert_h=`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&5 |
+  sed -n "$gl_absolute_header_sed"`
+
+          gl_header=$gl_cv_absolute_assert_h
+          gl_cv_next_assert_h='"'$gl_header'"'
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_next_assert_h" >&5
+printf "%s\n" "$gl_cv_next_assert_h" >&6; }
+     fi
+     NEXT_ASSERT_H=$gl_cv_next_assert_h
+
+     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
+       gl_next_as_first_directive='<'assert.h'>'
+     else
+       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
+       gl_next_as_first_directive=$gl_cv_next_assert_h
+     fi
+     NEXT_AS_FIRST_DIRECTIVE_ASSERT_H=$gl_next_as_first_directive
+
+
+
+ ;; #(
+  *) :
+     ;;
+esac
+
+
+
+
+
+
+
+  case "$GL_GENERATE_ASSERT_H" in
+    false) ASSERT_H='' ;;
+    true)
+                  if test -z "$ASSERT_H"; then
+        ASSERT_H="${gl_source_base_prefix}assert.h"
+      fi
+      ;;
+    *) echo "*** GL_GENERATE_ASSERT_H is not set correctly" 1>&2; exit 1 ;;
+  esac
+
+
+     if $GL_GENERATE_ASSERT_H; then
+  GL_GENERATE_ASSERT_H_TRUE=
+  GL_GENERATE_ASSERT_H_FALSE='#'
+else
+  GL_GENERATE_ASSERT_H_TRUE='#'
+  GL_GENERATE_ASSERT_H_FALSE=
+fi
+:
+    if test -z "${GL_GENERATE_ASSERT_H_TRUE}" && test -z "${GL_GENERATE_ASSERT_H_FALSE}"; then
+    GL_GENERATE_ASSERT_H_TRUE='#'
+    GL_GENERATE_ASSERT_H_FALSE='#'
+  fi
+
+
+
+
+
+
+
 
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for __builtin_expect" >&5
 printf %s "checking for __builtin_expect... " >&6; }
@@ -20522,14 +22667,14 @@ fi
 
      else
        case "$host_os" in
-                        # Guess yes on glibc systems.
-         *-gnu* | gnu*) ac_cv_func_calloc_0_nonnull="guessing yes" ;;
-                        # Guess yes on musl systems.
-         *-musl*)       ac_cv_func_calloc_0_nonnull="guessing yes" ;;
-                        # Guess yes on native Windows.
-         mingw*)        ac_cv_func_calloc_0_nonnull="guessing yes" ;;
-                        # If we don't know, obey --enable-cross-guesses.
-         *)             ac_cv_func_calloc_0_nonnull="$gl_cross_guess_normal" ;;
+                             # Guess yes on glibc systems.
+         *-gnu* | gnu*)      ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+                             # Guess yes on musl systems.
+         *-musl* | midipix*) ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+                             # Guess yes on native Windows.
+         mingw* | windows*)  ac_cv_func_calloc_0_nonnull="guessing yes" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+         *)                  ac_cv_func_calloc_0_nonnull="$gl_cross_guess_normal" ;;
        esac
      fi
 
@@ -20784,16 +22929,31 @@ fi
 
 
 
+
+
+  # On mingw, these functions are defined in the libwinpthread library,
+  # which is better avoided.  In fact, the clock_gettime function is buggy
+  # in 32-bit mingw, when -D__MINGW_USE_VC2005_COMPAT is used (which Gnulib's
+  # year2038 module does): It leaves the upper 32 bits of the tv_sec field
+  # of the result uninitialized.
+
   # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function.
   # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
 
   # Save and restore LIBS so e.g., -lrt, isn't added to it.  Otherwise, *all*
   # programs in the package would end up linked with that potentially-shared
   # library, inducing unnecessary run-time overhead.
-  LIB_CLOCK_GETTIME=
+  CLOCK_TIME_LIB=
 
-  gl_saved_libs=$LIBS
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
+  case "$host_os" in
+    mingw* | windows*)
+      ac_cv_func_clock_getres=no
+      ac_cv_func_clock_gettime=no
+      ac_cv_func_clock_settime=no
+      ;;
+    *)
+      gl_saved_libs=$LIBS
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
 printf %s "checking for library containing clock_gettime... " >&6; }
 if test ${ac_cv_search_clock_gettime+y}
 then :
@@ -20805,8 +22965,14 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char clock_gettime ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char clock_gettime (void);
 int
 main (void)
 {
@@ -20850,10 +23016,10 @@ if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
   test "$ac_cv_search_clock_gettime" = "none required" ||
-                    LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime
+                        CLOCK_TIME_LIB=$ac_cv_search_clock_gettime
 fi
 
-    ac_fn_c_check_func "$LINENO" "clock_getres" "ac_cv_func_clock_getres"
+        ac_fn_c_check_func "$LINENO" "clock_getres" "ac_cv_func_clock_getres"
 if test "x$ac_cv_func_clock_getres" = xyes
 then :
   printf "%s\n" "#define HAVE_CLOCK_GETRES 1" >>confdefs.h
@@ -20872,61 +23038,18 @@ then :
 
 fi
 
-  LIBS=$gl_saved_libs
-
-
-
-printf "%s\n" "#define GNULIB_TEST_CLOEXEC 1" >>confdefs.h
-
-
-
-
-
-
-    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
-      REPLACE_CLOSE=1
-    fi
-
-
-
-
-
-
-  if test $ac_cv_header_sys_socket_h != yes; then
-                    ac_fn_c_check_header_compile "$LINENO" "winsock2.h" "ac_cv_header_winsock2_h" "$ac_includes_default"
-if test "x$ac_cv_header_winsock2_h" = xyes
-then :
-  printf "%s\n" "#define HAVE_WINSOCK2_H 1" >>confdefs.h
-
-fi
-
-  fi
-  if test "$ac_cv_header_winsock2_h" = yes; then
-    HAVE_WINSOCK2_H=1
-    UNISTD_H_HAVE_WINSOCK2_H=1
-    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
-  else
-    HAVE_WINSOCK2_H=0
-  fi
-
-
-    if test $UNISTD_H_HAVE_WINSOCK2_H = 1; then
-                        REPLACE_CLOSE=1
-    fi
+      LIBS=$gl_saved_libs
+      ;;
+  esac
 
+  # For backward compatibility.
+  LIB_CLOCK_GETTIME="$CLOCK_TIME_LIB"
 
-    if test $REPLACE_CLOSE = 0; then
 
 
 
-  if test $ac_cv_func_fchdir = no; then
-    HAVE_FCHDIR=0
-  fi
+printf "%s\n" "#define GNULIB_TEST_CLOEXEC 1" >>confdefs.h
 
-      if test $HAVE_FCHDIR = 0; then
-        REPLACE_CLOSE=1
-      fi
-    fi
 
 
 
@@ -20974,7 +23097,11 @@ fi
 
   if test $ac_cv_func_closedir = no; then
     HAVE_CLOSEDIR=0
-  fi
+  else
+
+    if test $DIR_HAS_FD_MEMBER = 0; then
+      REPLACE_CLOSEDIR=1
+    fi
 
 
 
@@ -20983,16 +23110,11 @@ fi
     HAVE_FCHDIR=0
   fi
 
-    if test $HAVE_FCHDIR = 0; then
-      if test $HAVE_CLOSEDIR = 1; then
+      if test $HAVE_FCHDIR = 0; then
         REPLACE_CLOSEDIR=1
       fi
-    fi
 
-    case $host_os,$HAVE_CLOSEDIR in
-    os2*,1)
-      REPLACE_CLOSEDIR=1;;
-  esac
+  fi
 
 
      if test $HAVE_CLOSEDIR = 0 || test $REPLACE_CLOSEDIR = 1; then
@@ -21039,6 +23161,7 @@ printf "%s\n" "#define GNULIB_TEST_CLOSEDIR 1" >>confdefs.h
 
 
 
+
   ac_fn_c_check_func "$LINENO" "dirfd" "ac_cv_func_dirfd"
 if test "x$ac_cv_func_dirfd" = xyes
 then :
@@ -21089,19 +23212,18 @@ fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_dirfd_macro" >&5
 printf "%s\n" "$gl_cv_func_dirfd_macro" >&6; }
 
-  # Use the replacement if we have no function or macro with that name,
-  # or if OS/2 kLIBC whose dirfd() does not work.
-  # Replace only if the system declares dirfd already.
-  case $ac_cv_func_dirfd,$gl_cv_func_dirfd_macro,$host_os,$ac_cv_have_decl_dirfd in
-    no,no,*,yes | *,*,os2*,yes)
-      REPLACE_DIRFD=1
+  if test $ac_cv_func_dirfd = no && test $gl_cv_func_dirfd_macro = no; then
+    HAVE_DIRFD=0
+  else
+    HAVE_DIRFD=1
 
-printf "%s\n" "#define REPLACE_DIRFD 1" >>confdefs.h
-;;
-  esac
+    if test $DIR_HAS_FD_MEMBER = 0; then
+      REPLACE_DIRFD=1
+    fi
+  fi
 
 
-     if test $ac_cv_func_dirfd = no && test $gl_cv_func_dirfd_macro = no || test $REPLACE_DIRFD = 1; then
+     if test $HAVE_DIRFD = 0 || test $REPLACE_DIRFD = 1; then
   GL_COND_OBJ_DIRFD_TRUE=
   GL_COND_OBJ_DIRFD_FALSE='#'
 else
@@ -21255,9 +23377,9 @@ else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                 # Guess no on native Windows.
-         mingw*) gl_cv_func_dup_works="guessing no" ;;
-         *)      gl_cv_func_dup_works="guessing yes" ;;
+                            # Guess no on native Windows.
+         mingw* | windows*) gl_cv_func_dup_works="guessing no" ;;
+         *)                 gl_cv_func_dup_works="guessing yes" ;;
        esac
 
 else $as_nop
@@ -21353,7 +23475,7 @@ else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-         mingw*) # on this platform, dup2 always returns 0 for success
+         mingw* | windows*) # on this platform, dup2 always returns 0 for success
            gl_cv_func_dup2_works="guessing no" ;;
          cygwin*) # on cygwin 1.5.x, dup2(1,1) returns 0
            gl_cv_func_dup2_works="guessing no" ;;
@@ -21550,37 +23672,10 @@ fi
 
 
 
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for error_at_line" >&5
-printf %s "checking for error_at_line... " >&6; }
-if test ${ac_cv_lib_error_at_line+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <error.h>
-int
-main (void)
-{
-error_at_line (0, 0, "", 0, "an error occurred");
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"
-then :
-  ac_cv_lib_error_at_line=yes
-else $as_nop
-  ac_cv_lib_error_at_line=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_error_at_line" >&5
-printf "%s\n" "$ac_cv_lib_error_at_line" >&6; }
 
 
-     if test "$ac_cv_lib_error_at_line" = no; then
+
+     if test $COMPILE_ERROR_C = 1; then
   GL_COND_OBJ_ERROR_TRUE=
   GL_COND_OBJ_ERROR_FALSE='#'
 else
@@ -21616,6 +23711,8 @@ fi
 
 
 
+
+
   ac_fn_c_check_func "$LINENO" "euidaccess" "ac_cv_func_euidaccess"
 if test "x$ac_cv_func_euidaccess" = xyes
 then :
@@ -21645,6 +23742,73 @@ fi
 
 
 
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for faccessat" >&5
+printf %s "checking for faccessat... " >&6; }
+if test ${gl_cv_onwards_func_faccessat+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "faccessat" "ac_cv_have_decl_faccessat" "#include <unistd.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_faccessat" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_faccessat = yes; then
+             ac_fn_c_check_func "$LINENO" "faccessat" "ac_cv_func_faccessat"
+if test "x$ac_cv_func_faccessat" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_faccessat = yes; then
+               gl_cv_onwards_func_faccessat=yes
+             else
+                                                            gl_cv_onwards_func_faccessat='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_faccessat='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "faccessat" "ac_cv_func_faccessat"
+if test "x$ac_cv_func_faccessat" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_faccessat=$ac_cv_func_faccessat
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_faccessat" >&5
+printf "%s\n" "$gl_cv_onwards_func_faccessat" >&6; }
+
+  case "$gl_cv_onwards_func_faccessat" in
+    future*) ac_cv_func_faccessat=no ;;
+    *)       ac_cv_func_faccessat=$gl_cv_onwards_func_faccessat ;;
+  esac
+  if test $ac_cv_func_faccessat = yes; then
+
+printf "%s\n" "#define HAVE_FACCESSAT 1" >>confdefs.h
+
+  fi
+
+
     ac_fn_c_check_header_compile "$LINENO" "libgen.h" "ac_cv_header_libgen_h" "$ac_includes_default"
 if test "x$ac_cv_header_libgen_h" = xyes
 then :
@@ -21677,8 +23841,14 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char getgroups ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char getgroups (void);
 int
 main (void)
 {
@@ -21771,7 +23941,7 @@ printf "%s\n" "#define HAVE_GETGROUPS 1" >>confdefs.h
   # Save and restore LIBS so -lgen isn't added to it.  Otherwise, *all*
   # programs in the package would end up linked with that potentially-shared
   # library, inducing unnecessary run-time overhead.
-  LIB_EACCESS=
+  EUIDACCESS_LIBGEN=
 
   gl_saved_libs=$LIBS
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing eaccess" >&5
@@ -21786,8 +23956,14 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char eaccess ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char eaccess (void);
 int
 main (void)
 {
@@ -21831,7 +24007,7 @@ if test "$ac_res" != no
 then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
   test "$ac_cv_search_eaccess" = "none required" ||
-                    LIB_EACCESS=$ac_cv_search_eaccess
+                    EUIDACCESS_LIBGEN=$ac_cv_search_eaccess
 fi
 
     ac_fn_c_check_func "$LINENO" "eaccess" "ac_cv_func_eaccess"
@@ -21842,6 +24018,9 @@ then :
 fi
 
   LIBS=$gl_saved_libs
+  # For backward compatibility.
+  LIB_EACCESS="$EUIDACCESS_LIBGEN"
+
 
 
 fi
@@ -21872,8 +24051,78 @@ printf "%s\n" "#define GNULIB_TEST_EUIDACCESS 1" >>confdefs.h
 
 
 
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for faccessat" >&5
+printf %s "checking for faccessat... " >&6; }
+if test ${gl_cv_onwards_func_faccessat+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "faccessat" "ac_cv_have_decl_faccessat" "#include <unistd.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_faccessat" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_faccessat = yes; then
+             ac_fn_c_check_func "$LINENO" "faccessat" "ac_cv_func_faccessat"
+if test "x$ac_cv_func_faccessat" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_faccessat = yes; then
+               gl_cv_onwards_func_faccessat=yes
+             else
+                                                            gl_cv_onwards_func_faccessat='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_faccessat='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "faccessat" "ac_cv_func_faccessat"
+if test "x$ac_cv_func_faccessat" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_faccessat=$ac_cv_func_faccessat
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_faccessat" >&5
+printf "%s\n" "$gl_cv_onwards_func_faccessat" >&6; }
+
+  case "$gl_cv_onwards_func_faccessat" in
+    future*) ac_cv_func_faccessat=no ;;
+    *)       ac_cv_func_faccessat=$gl_cv_onwards_func_faccessat ;;
+  esac
+  if test $ac_cv_func_faccessat = yes; then
+
+printf "%s\n" "#define HAVE_FACCESSAT 1" >>confdefs.h
+
+  fi
+
+
   if test $ac_cv_func_faccessat = no; then
     HAVE_FACCESSAT=0
+    case "$gl_cv_onwards_func_faccessat" in
+      future*) REPLACE_FACCESSAT=1 ;;
+    esac
   else
     case $gl_cv_func_lstat_dereferences_slashed_symlink in
       *yes) ;;
@@ -21942,7 +24191,14 @@ printf "%s\n" "#define GNULIB_TEST_FACCESSAT 1" >>confdefs.h
   fi
 
 
-  if test $HAVE_FCHDIR = 0; then
+  if test $HAVE_FCHDIR = 1; then
+
+    if test $DIR_HAS_FD_MEMBER = 0; then
+            REPLACE_FCHDIR=1
+    fi
+  fi
+
+  if test $HAVE_FCHDIR = 0 || test $REPLACE_FCHDIR = 1; then
 
 printf "%s\n" "#define REPLACE_FCHDIR 1" >>confdefs.h
 
@@ -21955,14 +24211,16 @@ else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                             # Guess yes on Linux systems.
-            linux-* | linux) gl_cv_func_open_directory_works="guessing yes" ;;
-                             # Guess yes on glibc systems.
-            *-gnu* | gnu*)   gl_cv_func_open_directory_works="guessing yes" ;;
-                             # Guess no on native Windows.
-            mingw*)          gl_cv_func_open_directory_works="guessing no" ;;
-                             # If we don't know, obey --enable-cross-guesses.
-            *)               gl_cv_func_open_directory_works="$gl_cross_guess_normal" ;;
+                               # Guess yes on Linux systems.
+            linux-* | linux)   gl_cv_func_open_directory_works="guessing yes" ;;
+                               # Guess yes on systems that emulate the Linux system calls.
+            midipix*)          gl_cv_func_open_directory_works="guessing yes" ;;
+                               # Guess yes on glibc systems.
+            *-gnu* | gnu*)     gl_cv_func_open_directory_works="guessing yes" ;;
+                               # Guess no on native Windows.
+            mingw* | windows*) gl_cv_func_open_directory_works="guessing no" ;;
+                               # If we don't know, obey --enable-cross-guesses.
+            *)                 gl_cv_func_open_directory_works="$gl_cross_guess_normal" ;;
           esac
 
 else $as_nop
@@ -22005,7 +24263,7 @@ printf "%s\n" "#define REPLACE_OPEN_DIRECTORY 1" >>confdefs.h
   fi
 
 
-     if test $HAVE_FCHDIR = 0; then
+     if test $HAVE_FCHDIR = 0 || test $REPLACE_FCHDIR = 1; then
   GL_COND_OBJ_FCHDIR_TRUE=
   GL_COND_OBJ_FCHDIR_FALSE='#'
 else
@@ -22340,12 +24598,12 @@ else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                     # Guess yes on glibc systems.
-            *-gnu*)  gl_cv_func_fdopendir_works="guessing yes" ;;
-                     # Guess yes on musl systems.
-            *-musl*) gl_cv_func_fdopendir_works="guessing yes" ;;
-                     # If we don't know, obey --enable-cross-guesses.
-            *)       gl_cv_func_fdopendir_works="$gl_cross_guess_normal" ;;
+                                # Guess yes on glibc systems.
+            *-gnu*)             gl_cv_func_fdopendir_works="guessing yes" ;;
+                                # Guess yes on musl systems.
+            *-musl* | midipix*) gl_cv_func_fdopendir_works="guessing yes" ;;
+                                # If we don't know, obey --enable-cross-guesses.
+            *)                  gl_cv_func_fdopendir_works="$gl_cross_guess_normal" ;;
           esac
 
 else $as_nop
@@ -22443,6 +24701,73 @@ printf "%s\n" "#define GNULIB_FDOPENDIR 1" >>confdefs.h
 
 
 
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for mempcpy" >&5
+printf %s "checking for mempcpy... " >&6; }
+if test ${gl_cv_onwards_func_mempcpy+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "mempcpy" "ac_cv_have_decl_mempcpy" "#include <string.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_mempcpy" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_mempcpy = yes; then
+             ac_fn_c_check_func "$LINENO" "mempcpy" "ac_cv_func_mempcpy"
+if test "x$ac_cv_func_mempcpy" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_mempcpy = yes; then
+               gl_cv_onwards_func_mempcpy=yes
+             else
+                                                            gl_cv_onwards_func_mempcpy='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_mempcpy='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "mempcpy" "ac_cv_func_mempcpy"
+if test "x$ac_cv_func_mempcpy" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_mempcpy=$ac_cv_func_mempcpy
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_mempcpy" >&5
+printf "%s\n" "$gl_cv_onwards_func_mempcpy" >&6; }
+
+  case "$gl_cv_onwards_func_mempcpy" in
+    future*) ac_cv_func_mempcpy=no ;;
+    *)       ac_cv_func_mempcpy=$gl_cv_onwards_func_mempcpy ;;
+  esac
+  if test $ac_cv_func_mempcpy = yes; then
+
+printf "%s\n" "#define HAVE_MEMPCPY 1" >>confdefs.h
+
+  fi
+
+
+
 
 
 
@@ -22524,9 +24849,11 @@ else $as_nop
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
              ;;
-                   # Guess yes on native Windows.
-           mingw*) gl_cv_func_itold_works="guessing yes" ;;
-           *)      gl_cv_func_itold_works="guessing yes" ;;
+             # Guess yes on native Windows.
+           mingw* | windows*)
+             gl_cv_func_itold_works="guessing yes" ;;
+           *)
+             gl_cv_func_itold_works="guessing yes" ;;
          esac
 
 else $as_nop
@@ -22595,7 +24922,7 @@ _ACEOF
   esac
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                           gl_dirsep_regex='[/\\]'
       ;;
     *)
@@ -22805,7 +25132,11 @@ else $as_nop
 then :
   case "$host_os" in
            netbsd* | irix*) gl_cv_func_frexp_works="guessing no" ;;
-           mingw*) # Guess yes with MSVC, no with mingw.
+           # Guess yes with MSVC, no with mingw.
+           windows*-msvc*)
+             gl_cv_func_frexp_works="guessing yes"
+             ;;
+           mingw* | windows*)
              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -22889,7 +25220,8 @@ int main()
   {
     int exp;
     double y = frexp (x, &exp);
-    if (memcmp (&y, &x, sizeof x))
+    double x1 = x;
+    if (memcmp (&y, &x1, sizeof x1))
       result |= 4;
   }
   return result;
@@ -23014,7 +25346,7 @@ else $as_nop
 then :
 
          case "$host_os" in
-           aix | aix[3-6]* | beos* | darwin* | irix* | mingw* | pw*)
+           aix | aix[3-6]* | beos* | darwin* | irix* | mingw* | windows* | pw*)
               gl_cv_func_frexpl_works="guessing no";;
            *) gl_cv_func_frexpl_works="guessing yes";;
          esac
@@ -23184,7 +25516,7 @@ printf "%s\n" "#define GNULIB_TEST_FREXPL 1" >>confdefs.h
 
 
   case "$host_os" in
-    mingw* | solaris*)
+    darwin* | mingw* | windows* | solaris*)
                         REPLACE_FSTAT=1
       ;;
   esac
@@ -23224,7 +25556,7 @@ fi
   if test -z "$GL_COND_OBJ_FSTAT_TRUE"; then :
 
     case "$host_os" in
-      mingw*)
+      mingw* | windows*)
 
 
 
@@ -23321,7 +25653,7 @@ printf "%s\n" "$gl_cv_func_fstatat_zero_flag" >&6; }
     esac
 
     case $host_os in
-      solaris*)
+      darwin* | solaris*)
         REPLACE_FSTATAT=1 ;;
     esac
 
@@ -23371,8 +25703,78 @@ printf "%s\n" "#define GNULIB_TEST_FSTATAT 1" >>confdefs.h
 
 
 
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for futimens" >&5
+printf %s "checking for futimens... " >&6; }
+if test ${gl_cv_onwards_func_futimens+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "futimens" "ac_cv_have_decl_futimens" "#include <sys/stat.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_futimens" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_futimens = yes; then
+             ac_fn_c_check_func "$LINENO" "futimens" "ac_cv_func_futimens"
+if test "x$ac_cv_func_futimens" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_futimens = yes; then
+               gl_cv_onwards_func_futimens=yes
+             else
+                                                            gl_cv_onwards_func_futimens='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_futimens='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "futimens" "ac_cv_func_futimens"
+if test "x$ac_cv_func_futimens" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_futimens=$ac_cv_func_futimens
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_futimens" >&5
+printf "%s\n" "$gl_cv_onwards_func_futimens" >&6; }
+
+  case "$gl_cv_onwards_func_futimens" in
+    future*) ac_cv_func_futimens=no ;;
+    *)       ac_cv_func_futimens=$gl_cv_onwards_func_futimens ;;
+  esac
+  if test $ac_cv_func_futimens = yes; then
+
+printf "%s\n" "#define HAVE_FUTIMENS 1" >>confdefs.h
+
+  fi
+
+
   if test $ac_cv_func_futimens = no; then
     HAVE_FUTIMENS=0
+    case "$gl_cv_onwards_func_futimens" in
+      future*) REPLACE_FUTIMENS=1 ;;
+    esac
   else
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether futimens works" >&5
 printf %s "checking whether futimens works... " >&6; }
@@ -23537,6 +25939,74 @@ printf "%s\n" "#define GNULIB_TEST_GETCWD 1" >>confdefs.h
 
 
 
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for getdelim" >&5
+printf %s "checking for getdelim... " >&6; }
+if test ${gl_cv_onwards_func_getdelim+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "getdelim" "ac_cv_have_decl_getdelim" "#include <stdio.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_getdelim" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_getdelim = yes; then
+             ac_fn_c_check_func "$LINENO" "getdelim" "ac_cv_func_getdelim"
+if test "x$ac_cv_func_getdelim" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_getdelim = yes; then
+               gl_cv_onwards_func_getdelim=yes
+             else
+                                                            gl_cv_onwards_func_getdelim='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_getdelim='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "getdelim" "ac_cv_func_getdelim"
+if test "x$ac_cv_func_getdelim" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_getdelim=$ac_cv_func_getdelim
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_getdelim" >&5
+printf "%s\n" "$gl_cv_onwards_func_getdelim" >&6; }
+
+  case "$gl_cv_onwards_func_getdelim" in
+    future*) ac_cv_func_getdelim=no ;;
+    *)       ac_cv_func_getdelim=$gl_cv_onwards_func_getdelim ;;
+  esac
+  if test $ac_cv_func_getdelim = yes; then
+
+printf "%s\n" "#define HAVE_GETDELIM 1" >>confdefs.h
+
+  fi
+
+
   if test $ac_cv_func_getdelim = yes; then
     HAVE_GETDELIM=1
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working getdelim function" >&5
@@ -23545,10 +26015,14 @@ if test ${gl_cv_func_working_getdelim+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
-  echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
-       if test "$cross_compiling" = yes
+  case "$host_os" in
+         darwin*)
+                                                                             gl_cv_func_working_getdelim=no ;;
+         *)
+           echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
+           if test "$cross_compiling" = yes
 then :
-                      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+                              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <features.h>
@@ -23565,9 +26039,9 @@ then :
   gl_cv_func_working_getdelim="guessing yes"
 else $as_nop
   case "$host_os" in
-               *-musl*) gl_cv_func_working_getdelim="guessing yes" ;;
-               *)       gl_cv_func_working_getdelim="$gl_cross_guess_normal" ;;
-             esac
+                   *-musl* | midipix*) gl_cv_func_working_getdelim="guessing yes" ;;
+                   *)                  gl_cv_func_working_getdelim="$gl_cross_guess_normal" ;;
+                 esac
 
 fi
 rm -rf conftest*
@@ -23619,6 +26093,8 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
+           ;;
+       esac
 
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_working_getdelim" >&5
@@ -23629,6 +26105,9 @@ printf "%s\n" "$gl_cv_func_working_getdelim" >&6; }
     esac
   else
     HAVE_GETDELIM=0
+    case "$gl_cv_onwards_func_getdelim" in
+      future*) REPLACE_GETDELIM=1 ;;
+    esac
   fi
 
   if test $ac_cv_have_decl_getdelim = no; then
@@ -23834,8 +26313,14 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char getgroups ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char getgroups (void);
 int
 main (void)
 {
@@ -24031,17 +26516,76 @@ printf "%s\n" "#define GNULIB_TEST_GETGROUPS 1" >>confdefs.h
 
 
 
-  gl_getline_needs_run_time_check=no
-  ac_fn_c_check_func "$LINENO" "getline" "ac_cv_func_getline"
-if test "x$ac_cv_func_getline" = xyes
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for getline" >&5
+printf %s "checking for getline... " >&6; }
+if test ${gl_cv_onwards_func_getline+y}
 then :
-                   gl_getline_needs_run_time_check=yes
+  printf %s "(cached) " >&6
 else $as_nop
-  am_cv_func_working_getline=no
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "getline" "ac_cv_have_decl_getline" "#include <stdio.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_getline" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_getline = yes; then
+             ac_fn_c_check_func "$LINENO" "getline" "ac_cv_func_getline"
+if test "x$ac_cv_func_getline" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_getline = yes; then
+               gl_cv_onwards_func_getline=yes
+             else
+                                                            gl_cv_onwards_func_getline='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_getline='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "getline" "ac_cv_func_getline"
+if test "x$ac_cv_func_getline" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_getline=$ac_cv_func_getline
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
 fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_getline" >&5
+printf "%s\n" "$gl_cv_onwards_func_getline" >&6; }
+
+  case "$gl_cv_onwards_func_getline" in
+    future*) ac_cv_func_getline=no ;;
+    *)       ac_cv_func_getline=$gl_cv_onwards_func_getline ;;
+  esac
+  if test $ac_cv_func_getline = yes; then
 
-  if test $gl_getline_needs_run_time_check = yes; then
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working getline function" >&5
+printf "%s\n" "#define HAVE_GETLINE 1" >>confdefs.h
+
+  fi
+
+
+  if test $ac_cv_func_getline = yes; then
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working getline function" >&5
 printf %s "checking for working getline function... " >&6; }
 if test ${am_cv_func_working_getline+y}
 then :
@@ -24067,8 +26611,8 @@ then :
   am_cv_func_working_getline="guessing yes"
 else $as_nop
   case "$host_os" in
-               *-musl*) am_cv_func_working_getline="guessing yes" ;;
-               *)       am_cv_func_working_getline="$gl_cross_guess_normal" ;;
+               *-musl* | midipix*) am_cv_func_working_getline="guessing yes" ;;
+               *)                  am_cv_func_working_getline="$gl_cross_guess_normal" ;;
              esac
 
 fi
@@ -24125,6 +26669,11 @@ fi
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_func_working_getline" >&5
 printf "%s\n" "$am_cv_func_working_getline" >&6; }
+  else
+    am_cv_func_working_getline=no
+    case "$gl_cv_onwards_func_getline" in
+      future*) REPLACE_GETLINE=1 ;;
+    esac
   fi
 
   if test $ac_cv_have_decl_getline = no; then
@@ -24322,6 +26871,116 @@ printf "%s\n" "#define GNULIB_TEST_GETOPT_POSIX 1" >>confdefs.h
 
 
 
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for getprogname" >&5
+printf %s "checking for getprogname... " >&6; }
+if test ${gl_cv_onwards_func_getprogname+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "getprogname" "ac_cv_have_decl_getprogname" "#include <stdlib.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_getprogname" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_getprogname = yes; then
+             ac_fn_c_check_func "$LINENO" "getprogname" "ac_cv_func_getprogname"
+if test "x$ac_cv_func_getprogname" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_getprogname = yes; then
+               gl_cv_onwards_func_getprogname=yes
+             else
+                                                            gl_cv_onwards_func_getprogname='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_getprogname='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "getprogname" "ac_cv_func_getprogname"
+if test "x$ac_cv_func_getprogname" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_getprogname=$ac_cv_func_getprogname
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_getprogname" >&5
+printf "%s\n" "$gl_cv_onwards_func_getprogname" >&6; }
+
+  case "$gl_cv_onwards_func_getprogname" in
+    future*) ac_cv_func_getprogname=no ;;
+    *)       ac_cv_func_getprogname=$gl_cv_onwards_func_getprogname ;;
+  esac
+  if test $ac_cv_func_getprogname = yes; then
+
+printf "%s\n" "#define HAVE_GETPROGNAME 1" >>confdefs.h
+
+  fi
+
+
+  if test $ac_cv_func_getprogname = no; then
+    HAVE_GETPROGNAME=0
+    case "$gl_cv_onwards_func_getprogname" in
+      future*) REPLACE_GETPROGNAME=1 ;;
+    esac
+  fi
+  ac_fn_check_decl "$LINENO" "program_invocation_name" "ac_cv_have_decl_program_invocation_name" "#include <errno.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_program_invocation_name" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_PROGRAM_INVOCATION_NAME $ac_have_decl" >>confdefs.h
+if test $ac_have_decl = 1
+then :
+
+else $as_nop
+  HAVE_DECL_PROGRAM_INVOCATION_NAME=0
+fi
+
+
+
+     if test $HAVE_GETPROGNAME = 0 || test $REPLACE_GETPROGNAME = 1; then
+  GL_COND_OBJ_GETPROGNAME_TRUE=
+  GL_COND_OBJ_GETPROGNAME_FALSE='#'
+else
+  GL_COND_OBJ_GETPROGNAME_TRUE='#'
+  GL_COND_OBJ_GETPROGNAME_FALSE=
+fi
+:
+    if test -z "${GL_COND_OBJ_GETPROGNAME_TRUE}" && test -z "${GL_COND_OBJ_GETPROGNAME_FALSE}"; then
+    GL_COND_OBJ_GETPROGNAME_TRUE='#'
+    GL_COND_OBJ_GETPROGNAME_FALSE='#'
+  fi
+
+  if test -z "$GL_COND_OBJ_GETPROGNAME_TRUE"; then :
+
+
+
+
   ac_found=0
   ac_fn_check_decl "$LINENO" "program_invocation_name" "ac_cv_have_decl_program_invocation_name" "#include <errno.h>
 " "$ac_c_undeclared_builtin_options" "CFLAGS"
@@ -24410,14 +27069,41 @@ printf "%s\n" "#define HAVE_VAR___PROGNAME 1" >>confdefs.h
   fi
 
 
+fi
+
+
+
+
+
+
 
 
 
+          GL_GNULIB_GETPROGNAME=1
 
 
 
 
 
+printf "%s\n" "#define GNULIB_TEST_GETPROGNAME 1" >>confdefs.h
+
+
+
+
+
+
+
+
+
+
+  if test $gl_cv_func_timespec_get = yes; then
+
+printf "%s\n" "#define HAVE_TIMESPEC_GET 1" >>confdefs.h
+
+  fi
+
+
+
 
 
 
@@ -24494,7 +27180,7 @@ printf "%s\n" "$gl_cv_func_gettimeofday_posix_signature" >&6; }
       REPLACE_GETTIMEOFDAY=1
     fi
             case "$host_os" in
-      mingw*) REPLACE_GETTIMEOFDAY=1 ;;
+      mingw* | windows*) REPLACE_GETTIMEOFDAY=1 ;;
     esac
   fi
 
@@ -24544,6 +27230,7 @@ printf "%s\n" "#define GNULIB_TEST_GETTIMEOFDAY 1" >>confdefs.h
 
 
 
+
       ac_fn_c_check_func "$LINENO" "group_member" "ac_cv_func_group_member"
 if test "x$ac_cv_func_group_member" = xyes
 then :
@@ -24722,7 +27409,7 @@ else $as_nop
 then :
   case "$host_os" in
            irix* | solaris*) gl_cv_func_isnanf_works="guessing no" ;;
-           mingw*) # Guess yes on mingw, no on MSVC.
+           mingw* | windows*) # Guess yes on mingw, no on MSVC.
              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -24843,113 +27530,6 @@ printf "%s\n" "#define HAVE_ISNANF_IN_LIBC 1" >>confdefs.h
 
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking where to find the exponent in a 'float'" >&5
-printf %s "checking where to find the exponent in a 'float'... " >&6; }
-if test ${gl_cv_cc_float_expbit0+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-
-      if test "$cross_compiling" = yes
-then :
-  gl_cv_cc_float_expbit0="word 0 bit 23"
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#include <float.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
-#define NWORDS \
-  ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
-typedef union { float value; unsigned int word[NWORDS]; } memory_float;
-static unsigned int ored_words[NWORDS];
-static unsigned int anded_words[NWORDS];
-static void add_to_ored_words (float x)
-{
-  memory_float m;
-  size_t i;
-  /* Clear it first, in case
-     sizeof (float) < sizeof (memory_float).  */
-  memset (&m, 0, sizeof (memory_float));
-  m.value = x;
-  for (i = 0; i < NWORDS; i++)
-    {
-      ored_words[i] |= m.word[i];
-      anded_words[i] &= m.word[i];
-    }
-}
-int main ()
-{
-  size_t j;
-  FILE *fp = fopen ("conftest.out", "w");
-  if (fp == NULL)
-    return 1;
-  for (j = 0; j < NWORDS; j++)
-    anded_words[j] = ~ (unsigned int) 0;
-  add_to_ored_words (0.25f);
-  add_to_ored_words (0.5f);
-  add_to_ored_words (1.0f);
-  add_to_ored_words (2.0f);
-  add_to_ored_words (4.0f);
-  /* Remove bits that are common (e.g. if representation of the first mantissa
-     bit is explicit).  */
-  for (j = 0; j < NWORDS; j++)
-    ored_words[j] &= ~anded_words[j];
-  /* Now find the nonzero word.  */
-  for (j = 0; j < NWORDS; j++)
-    if (ored_words[j] != 0)
-      break;
-  if (j < NWORDS)
-    {
-      size_t i;
-      for (i = j + 1; i < NWORDS; i++)
-        if (ored_words[i] != 0)
-          {
-            fprintf (fp, "unknown");
-            return (fclose (fp) != 0);
-          }
-      for (i = 0; ; i++)
-        if ((ored_words[j] >> i) & 1)
-          {
-            fprintf (fp, "word %d bit %d", (int) j, (int) i);
-            return (fclose (fp) != 0);
-          }
-    }
-  fprintf (fp, "unknown");
-  return (fclose (fp) != 0);
-}
-
-_ACEOF
-if ac_fn_c_try_run "$LINENO"
-then :
-  gl_cv_cc_float_expbit0=`cat conftest.out`
-else $as_nop
-  gl_cv_cc_float_expbit0="unknown"
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-      rm -f conftest.out
-
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_float_expbit0" >&5
-printf "%s\n" "$gl_cv_cc_float_expbit0" >&6; }
-  case "$gl_cv_cc_float_expbit0" in
-    word*bit*)
-      word=`echo "$gl_cv_cc_float_expbit0" | sed -e 's/word //' -e 's/ bit.*//'`
-      bit=`echo "$gl_cv_cc_float_expbit0" | sed -e 's/word.*bit //'`
-
-printf "%s\n" "#define FLT_EXPBIT0_WORD $word" >>confdefs.h
-
-
-printf "%s\n" "#define FLT_EXPBIT0_BIT $bit" >>confdefs.h
-
-      ;;
-  esac
-
 
   fi
 
@@ -25009,7 +27589,7 @@ else $as_nop
       if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-           mingw*) # Guess yes on mingw, no on MSVC.
+           mingw* | windows*) # Guess yes on mingw, no on MSVC.
              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -25185,150 +27765,6 @@ printf "%s\n" "#define HAVE_ISNANL_IN_LIBC 1" >>confdefs.h
 
 
 
-     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking where to find the exponent in a 'long double'" >&5
-printf %s "checking where to find the exponent in a 'long double'... " >&6; }
-if test ${gl_cv_cc_long_double_expbit0+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-
-      if test "$cross_compiling" = yes
-then :
-
-                              gl_cv_cc_long_double_expbit0="unknown"
-          case "$host_os" in
-            mingw*) # On native Windows (little-endian), we know the result
-                    # in two cases: mingw, MSVC.
-              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#ifdef __MINGW32__
- Known
-#endif
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "Known" >/dev/null 2>&1
-then :
-  gl_cv_cc_long_double_expbit0="word 2 bit 0"
-fi
-rm -rf conftest*
-
-              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#ifdef _MSC_VER
- Known
-#endif
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "Known" >/dev/null 2>&1
-then :
-  gl_cv_cc_long_double_expbit0="word 1 bit 20"
-fi
-rm -rf conftest*
-
-              ;;
-          esac
-
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#include <float.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
-#define NWORDS \
-  ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
-typedef union { long double value; unsigned int word[NWORDS]; }
-        memory_long_double;
-static unsigned int ored_words[NWORDS];
-static unsigned int anded_words[NWORDS];
-static void add_to_ored_words (long double *x)
-{
-  memory_long_double m;
-  size_t i;
-  /* Clear it first, in case
-     sizeof (long double) < sizeof (memory_long_double).  */
-  memset (&m, 0, sizeof (memory_long_double));
-  m.value = *x;
-  for (i = 0; i < NWORDS; i++)
-    {
-      ored_words[i] |= m.word[i];
-      anded_words[i] &= m.word[i];
-    }
-}
-int main ()
-{
-  static long double samples[5] = { 0.25L, 0.5L, 1.0L, 2.0L, 4.0L };
-  size_t j;
-  FILE *fp = fopen ("conftest.out", "w");
-  if (fp == NULL)
-    return 1;
-  for (j = 0; j < NWORDS; j++)
-    anded_words[j] = ~ (unsigned int) 0;
-  for (j = 0; j < 5; j++)
-    add_to_ored_words (&samples[j]);
-  /* Remove bits that are common (e.g. if representation of the first mantissa
-     bit is explicit).  */
-  for (j = 0; j < NWORDS; j++)
-    ored_words[j] &= ~anded_words[j];
-  /* Now find the nonzero word.  */
-  for (j = 0; j < NWORDS; j++)
-    if (ored_words[j] != 0)
-      break;
-  if (j < NWORDS)
-    {
-      size_t i;
-      for (i = j + 1; i < NWORDS; i++)
-        if (ored_words[i] != 0)
-          {
-            fprintf (fp, "unknown");
-            return (fclose (fp) != 0);
-          }
-      for (i = 0; ; i++)
-        if ((ored_words[j] >> i) & 1)
-          {
-            fprintf (fp, "word %d bit %d", (int) j, (int) i);
-            return (fclose (fp) != 0);
-          }
-    }
-  fprintf (fp, "unknown");
-  return (fclose (fp) != 0);
-}
-
-_ACEOF
-if ac_fn_c_try_run "$LINENO"
-then :
-  gl_cv_cc_long_double_expbit0=`cat conftest.out`
-else $as_nop
-  gl_cv_cc_long_double_expbit0="unknown"
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-      rm -f conftest.out
-
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_cc_long_double_expbit0" >&5
-printf "%s\n" "$gl_cv_cc_long_double_expbit0" >&6; }
-  case "$gl_cv_cc_long_double_expbit0" in
-    word*bit*)
-      word=`echo "$gl_cv_cc_long_double_expbit0" | sed -e 's/word //' -e 's/ bit.*//'`
-      bit=`echo "$gl_cv_cc_long_double_expbit0" | sed -e 's/word.*bit //'`
-
-printf "%s\n" "#define LDBL_EXPBIT0_WORD $word" >>confdefs.h
-
-
-printf "%s\n" "#define LDBL_EXPBIT0_BIT $bit" >>confdefs.h
-
-      ;;
-  esac
-
-
 
   fi
 
@@ -25408,7 +27844,7 @@ fi
   if test $ac_cv_func_lstat = yes; then
 
     case $host_os,$gl_cv_func_lstat_dereferences_slashed_symlink in
-      solaris* | *no)
+      darwin* | solaris* | *no)
         REPLACE_LSTAT=1
         ;;
     esac
@@ -25471,8 +27907,8 @@ then :
   case "$host_os" in
           # Guess yes on platforms where we know the result.
           *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
-          | gnu* | *-musl* | midnightbsd* \
-          | hpux* | solaris* | cygwin* | mingw* | msys* )
+          | gnu* | *-musl* | midipix* | midnightbsd* \
+          | hpux* | solaris* | cygwin* | mingw* | windows* | msys* )
             ac_cv_func_malloc_0_nonnull="guessing yes" ;;
           # If we don't know, obey --enable-cross-guesses.
           *) ac_cv_func_malloc_0_nonnull="$gl_cross_guess_normal" ;;
@@ -25487,7 +27923,8 @@ int
 main (void)
 {
 void *p = malloc (0);
-            int result = !p;
+            void * volatile vp = p;
+            int result = !vp;
             free (p);
             return result;
   ;
@@ -25593,6 +28030,33 @@ printf "%s\n" "#define GNULIB_TEST_MALLOC_POSIX 1" >>confdefs.h
 
 
 
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+          GL_GNULIB_MBSZERO=1
+
+
+
+
+
+printf "%s\n" "#define GNULIB_TEST_MBSZERO 1" >>confdefs.h
+
+
+
+
+
      if test $REPLACE_MEMCHR = 1; then
   GL_COND_OBJ_MEMCHR_TRUE=
   GL_COND_OBJ_MEMCHR_FALSE='#'
@@ -25649,19 +28113,83 @@ printf "%s\n" "#define GNULIB_TEST_MEMCHR 1" >>confdefs.h
 
 
 
-  ac_fn_c_check_func "$LINENO" "mempcpy" "ac_cv_func_mempcpy"
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for mempcpy" >&5
+printf %s "checking for mempcpy... " >&6; }
+if test ${gl_cv_onwards_func_mempcpy+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "mempcpy" "ac_cv_have_decl_mempcpy" "#include <string.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_mempcpy" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_mempcpy = yes; then
+             ac_fn_c_check_func "$LINENO" "mempcpy" "ac_cv_func_mempcpy"
 if test "x$ac_cv_func_mempcpy" = xyes
 then :
-  printf "%s\n" "#define HAVE_MEMPCPY 1" >>confdefs.h
 
 fi
 
+             if test $ac_cv_func_mempcpy = yes; then
+               gl_cv_onwards_func_mempcpy=yes
+             else
+                                                            gl_cv_onwards_func_mempcpy='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_mempcpy='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "mempcpy" "ac_cv_func_mempcpy"
+if test "x$ac_cv_func_mempcpy" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_mempcpy=$ac_cv_func_mempcpy
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_mempcpy" >&5
+printf "%s\n" "$gl_cv_onwards_func_mempcpy" >&6; }
+
+  case "$gl_cv_onwards_func_mempcpy" in
+    future*) ac_cv_func_mempcpy=no ;;
+    *)       ac_cv_func_mempcpy=$gl_cv_onwards_func_mempcpy ;;
+  esac
+  if test $ac_cv_func_mempcpy = yes; then
+
+printf "%s\n" "#define HAVE_MEMPCPY 1" >>confdefs.h
+
+  fi
+
+
   if test $ac_cv_func_mempcpy = no; then
     HAVE_MEMPCPY=0
+    case "$gl_cv_onwards_func_mempcpy" in
+      future*) REPLACE_MEMPCPY=1 ;;
+    esac
   fi
 
 
-     if test $HAVE_MEMPCPY = 0; then
+     if test $HAVE_MEMPCPY = 0 || test $REPLACE_MEMPCPY = 1; then
   GL_COND_OBJ_MEMPCPY_TRUE=
   GL_COND_OBJ_MEMPCPY_FALSE='#'
 else
@@ -25780,12 +28308,15 @@ else $as_nop
      if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                           # Guess yes on Linux systems.
-          linux-* | linux) gl_cv_func_mkdir_trailing_slash_works="guessing yes" ;;
-                           # Guess yes on glibc systems.
-          *-gnu* | gnu*)   gl_cv_func_mkdir_trailing_slash_works="guessing yes" ;;
-                           # Guess yes on MSVC, no on mingw.
-          mingw*)          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+                             # Guess yes on Linux systems.
+          linux-* | linux)   gl_cv_func_mkdir_trailing_slash_works="guessing yes" ;;
+                             # Guess yes on systems that emulate the Linux system calls.
+          midipix*)          gl_cv_func_mkdir_trailing_slash_works="guessing yes" ;;
+                             # Guess yes on glibc systems.
+          *-gnu* | gnu*)     gl_cv_func_mkdir_trailing_slash_works="guessing yes" ;;
+                             # Guess yes on MSVC, no on mingw.
+          windows*-msvc*)    gl_cv_func_mkdir_trailing_slash_works="guessing yes" ;;
+          mingw* | windows*) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #ifdef _MSC_VER
@@ -25802,9 +28333,9 @@ else $as_nop
 fi
 rm -rf conftest*
 
-                           ;;
-                           # If we don't know, obey --enable-cross-guesses.
-          *)               gl_cv_func_mkdir_trailing_slash_works="$gl_cross_guess_normal" ;;
+                             ;;
+                             # If we don't know, obey --enable-cross-guesses.
+          *)                 gl_cv_func_mkdir_trailing_slash_works="$gl_cross_guess_normal" ;;
         esac
 
 else $as_nop
@@ -25857,14 +28388,16 @@ else $as_nop
      if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                         # Guess yes on glibc systems.
-          *-gnu* | gnu*) gl_cv_func_mkdir_trailing_dot_works="guessing yes" ;;
-                         # Guess yes on musl systems.
-          *-musl*)       gl_cv_func_mkdir_trailing_dot_works="guessing yes" ;;
-                         # Guess no on native Windows.
-          mingw*)        gl_cv_func_mkdir_trailing_dot_works="guessing no" ;;
-                         # If we don't know, obey --enable-cross-guesses.
-          *)             gl_cv_func_mkdir_trailing_dot_works="$gl_cross_guess_normal" ;;
+                             # Guess yes on glibc systems.
+          *-gnu* | gnu*)     gl_cv_func_mkdir_trailing_dot_works="guessing yes" ;;
+                             # Guess yes on musl systems.
+          *-musl*)           gl_cv_func_mkdir_trailing_dot_works="guessing yes" ;;
+                             # Guess yes on systems that emulate the Linux system calls.
+          midipix*)          gl_cv_func_mkdir_trailing_dot_works="guessing yes" ;;
+                             # Guess no on native Windows.
+          mingw* | windows*) gl_cv_func_mkdir_trailing_dot_works="guessing no" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+          *)                 gl_cv_func_mkdir_trailing_dot_works="$gl_cross_guess_normal" ;;
         esac
 
 else $as_nop
@@ -26032,7 +28565,7 @@ printf "%s\n" "#define GNULIB_MSVC_NOTHROW 1" >>confdefs.h
 
 
   case "$host_os" in
-    mingw* | pw*)
+    mingw* | windows* | pw*)
       REPLACE_OPEN=1
       ;;
     *)
@@ -26251,7 +28784,11 @@ fi
 
   if test $ac_cv_func_opendir = no; then
     HAVE_OPENDIR=0
-  fi
+  else
+
+    if test $DIR_HAS_FD_MEMBER = 0; then
+      REPLACE_OPENDIR=1
+    fi
 
 
 
@@ -26260,16 +28797,11 @@ fi
     HAVE_FCHDIR=0
   fi
 
-    if test $HAVE_FCHDIR = 0; then
-      if test $HAVE_OPENDIR = 1; then
+      if test $HAVE_FCHDIR = 0; then
         REPLACE_OPENDIR=1
       fi
-    fi
 
-      case $host_os,$HAVE_OPENDIR in
-    os2*,1)
-      REPLACE_OPENDIR=1;;
-  esac
+  fi
 
 
      if test $HAVE_OPENDIR = 0 || test $REPLACE_OPENDIR = 1; then
@@ -26365,7 +28897,11 @@ else $as_nop
 then :
   case "$host_os" in
            netbsd* | irix*) gl_cv_func_frexp_works="guessing no" ;;
-           mingw*) # Guess yes with MSVC, no with mingw.
+           # Guess yes with MSVC, no with mingw.
+           windows*-msvc*)
+             gl_cv_func_frexp_works="guessing yes"
+             ;;
+           mingw* | windows*)
              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -26449,7 +28985,8 @@ int main()
   {
     int exp;
     double y = frexp (x, &exp);
-    if (memcmp (&y, &x, sizeof x))
+    double x1 = x;
+    if (memcmp (&y, &x1, sizeof x1))
       result |= 4;
   }
   return result;
@@ -26568,7 +29105,7 @@ else $as_nop
 then :
 
          case "$host_os" in
-           aix | aix[3-6]* | beos* | darwin* | irix* | mingw* | pw*)
+           aix | aix[3-6]* | beos* | darwin* | irix* | mingw* | windows* | pw*)
               gl_cv_func_frexpl_works="guessing no";;
            *) gl_cv_func_frexpl_works="guessing yes";;
          esac
@@ -26756,10 +29293,10 @@ else $as_nop
 then :
 
          case "$host_os" in
-           aix | aix[3-6]*) gl_cv_func_ldexpl_works="guessing no" ;;
-                            # Guess yes on native Windows.
-           mingw*)          gl_cv_func_ldexpl_works="guessing yes" ;;
-           *)               gl_cv_func_ldexpl_works="guessing yes" ;;
+           aix | aix[3-6]*)   gl_cv_func_ldexpl_works="guessing no" ;;
+                              # Guess yes on native Windows.
+           mingw* | windows*) gl_cv_func_ldexpl_works="guessing yes" ;;
+           *)                 gl_cv_func_ldexpl_works="guessing yes" ;;
          esac
 
 else $as_nop
@@ -26931,6 +29468,9 @@ then :
             # Guess yes on Linux or glibc systems.
             linux-* | linux | *-gnu* | gnu*)
               gl_cv_func_readlink_trailing_slash="guessing yes" ;;
+            # Guess yes on systems that emulate the Linux system calls.
+            midipix*)
+              gl_cv_func_readlink_trailing_slash="guessing yes" ;;
             # Guess no on AIX or HP-UX.
             aix* | hpux*)
               gl_cv_func_readlink_trailing_slash="guessing no" ;;
@@ -26995,6 +29535,9 @@ then :
             # Guess yes on Linux or glibc systems.
             linux-* | linux | *-gnu* | gnu*)
               gl_cv_func_readlink_truncate="guessing yes" ;;
+            # Guess yes on systems that emulate the Linux system calls.
+            midipix*)
+              gl_cv_func_readlink_truncate="guessing yes" ;;
             # Guess no on AIX or HP-UX.
             aix* | hpux*)
               gl_cv_func_readlink_truncate="guessing no" ;;
@@ -27091,8 +29634,78 @@ printf "%s\n" "#define GNULIB_TEST_READLINK 1" >>confdefs.h
 
 
 
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for readlinkat" >&5
+printf %s "checking for readlinkat... " >&6; }
+if test ${gl_cv_onwards_func_readlinkat+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "readlinkat" "ac_cv_have_decl_readlinkat" "#include <unistd.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_readlinkat" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_readlinkat = yes; then
+             ac_fn_c_check_func "$LINENO" "readlinkat" "ac_cv_func_readlinkat"
+if test "x$ac_cv_func_readlinkat" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_readlinkat = yes; then
+               gl_cv_onwards_func_readlinkat=yes
+             else
+                                                            gl_cv_onwards_func_readlinkat='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_readlinkat='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "readlinkat" "ac_cv_func_readlinkat"
+if test "x$ac_cv_func_readlinkat" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_readlinkat=$ac_cv_func_readlinkat
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_readlinkat" >&5
+printf "%s\n" "$gl_cv_onwards_func_readlinkat" >&6; }
+
+  case "$gl_cv_onwards_func_readlinkat" in
+    future*) ac_cv_func_readlinkat=no ;;
+    *)       ac_cv_func_readlinkat=$gl_cv_onwards_func_readlinkat ;;
+  esac
+  if test $ac_cv_func_readlinkat = yes; then
+
+printf "%s\n" "#define HAVE_READLINKAT 1" >>confdefs.h
+
+  fi
+
+
+
   if test $ac_cv_func_readlinkat = no; then
     HAVE_READLINKAT=0
+    case "$gl_cv_onwards_func_readlinkat" in
+      future*) REPLACE_READLINKAT=1 ;;
+    esac
   else
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether readlinkat signature is correct" >&5
 printf %s "checking whether readlinkat signature is correct... " >&6; }
@@ -27183,8 +29796,8 @@ then :
   case "$host_os" in
           # Guess yes on platforms where we know the result.
           *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
-          | gnu* | *-musl* | midnightbsd* \
-          | hpux* | solaris* | cygwin* | mingw* | msys* )
+          | gnu* | *-musl* | midipix* | midnightbsd* \
+          | hpux* | solaris* | cygwin* | mingw* | windows* | msys* )
             ac_cv_func_realloc_0_nonnull="guessing yes" ;;
           # If we don't know, obey --enable-cross-guesses.
           *) ac_cv_func_realloc_0_nonnull="$gl_cross_guess_normal" ;;
@@ -27199,7 +29812,8 @@ int
 main (void)
 {
 void *p = realloc (0, 0);
-            int result = !p;
+            void * volatile vp = p;
+            int result = !vp;
             free (p);
             return result;
   ;
@@ -27304,15 +29918,79 @@ printf "%s\n" "#define GNULIB_TEST_REALLOC_POSIX 1" >>confdefs.h
 
 
 
-  ac_fn_c_check_func "$LINENO" "reallocarray" "ac_cv_func_reallocarray"
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for reallocarray" >&5
+printf %s "checking for reallocarray... " >&6; }
+if test ${gl_cv_onwards_func_reallocarray+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "reallocarray" "ac_cv_have_decl_reallocarray" "#include <stdlib.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_reallocarray" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_reallocarray = yes; then
+             ac_fn_c_check_func "$LINENO" "reallocarray" "ac_cv_func_reallocarray"
+if test "x$ac_cv_func_reallocarray" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_reallocarray = yes; then
+               gl_cv_onwards_func_reallocarray=yes
+             else
+                                                            gl_cv_onwards_func_reallocarray='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_reallocarray='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "reallocarray" "ac_cv_func_reallocarray"
 if test "x$ac_cv_func_reallocarray" = xyes
 then :
-  printf "%s\n" "#define HAVE_REALLOCARRAY 1" >>confdefs.h
 
 fi
 
+           gl_cv_onwards_func_reallocarray=$ac_cv_func_reallocarray
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_reallocarray" >&5
+printf "%s\n" "$gl_cv_onwards_func_reallocarray" >&6; }
+
+  case "$gl_cv_onwards_func_reallocarray" in
+    future*) ac_cv_func_reallocarray=no ;;
+    *)       ac_cv_func_reallocarray=$gl_cv_onwards_func_reallocarray ;;
+  esac
+  if test $ac_cv_func_reallocarray = yes; then
+
+printf "%s\n" "#define HAVE_REALLOCARRAY 1" >>confdefs.h
+
+  fi
+
+
   if test "$ac_cv_func_reallocarray" = no; then
     HAVE_REALLOCARRAY=0
+    case "$gl_cv_onwards_func_reallocarray" in
+      future*) REPLACE_REALLOCARRAY=1 ;;
+    esac
   elif test "$gl_cv_malloc_ptrdiff" = no; then
     REPLACE_REALLOCARRAY=1
   fi
@@ -27381,14 +30059,16 @@ else $as_nop
     if test "$cross_compiling" = yes
 then :
         case "$host_os" in
-                          # Guess yes on Linux systems.
-         linux-* | linux) gl_cv_func_rename_slash_dst_works="guessing yes" ;;
-                          # Guess yes on glibc systems.
-         *-gnu*)          gl_cv_func_rename_slash_dst_works="guessing yes" ;;
-                          # Guess no on native Windows.
-         mingw*)          gl_cv_func_rename_slash_dst_works="guessing no" ;;
-                          # If we don't know, obey --enable-cross-guesses.
-         *)               gl_cv_func_rename_slash_dst_works="$gl_cross_guess_normal" ;;
+                            # Guess yes on Linux systems.
+         linux-* | linux)   gl_cv_func_rename_slash_dst_works="guessing yes" ;;
+                            # Guess yes on systems that emulate the Linux system calls.
+         midipix*)          gl_cv_func_rename_slash_dst_works="guessing yes" ;;
+                            # Guess yes on glibc systems.
+         *-gnu*)            gl_cv_func_rename_slash_dst_works="guessing yes" ;;
+                            # Guess no on native Windows.
+         mingw* | windows*) gl_cv_func_rename_slash_dst_works="guessing no" ;;
+                            # If we don't know, obey --enable-cross-guesses.
+         *)                 gl_cv_func_rename_slash_dst_works="$gl_cross_guess_normal" ;;
        esac
 
 else $as_nop
@@ -27457,14 +30137,16 @@ else $as_nop
     if test "$cross_compiling" = yes
 then :
         case "$host_os" in
-                          # Guess yes on Linux systems.
-         linux-* | linux) gl_cv_func_rename_slash_src_works="guessing yes" ;;
-                          # Guess yes on glibc systems.
-         *-gnu*)          gl_cv_func_rename_slash_src_works="guessing yes" ;;
-                          # Guess yes on native Windows.
-         mingw*)          gl_cv_func_rename_slash_src_works="guessing yes" ;;
-                          # If we don't know, obey --enable-cross-guesses.
-         *)               gl_cv_func_rename_slash_src_works="$gl_cross_guess_normal" ;;
+                            # Guess yes on Linux systems.
+         linux-* | linux)   gl_cv_func_rename_slash_src_works="guessing yes" ;;
+                            # Guess yes on systems that emulate the Linux system calls.
+         midipix*)          gl_cv_func_rename_slash_src_works="guessing yes" ;;
+                            # Guess yes on glibc systems.
+         *-gnu*)            gl_cv_func_rename_slash_src_works="guessing yes" ;;
+                            # Guess yes on native Windows.
+         mingw* | windows*) gl_cv_func_rename_slash_src_works="guessing yes" ;;
+                            # If we don't know, obey --enable-cross-guesses.
+         *)                 gl_cv_func_rename_slash_src_works="$gl_cross_guess_normal" ;;
        esac
 
 else $as_nop
@@ -27587,14 +30269,16 @@ fi
          rm -rf conftest.f conftest.f1 conftest.f2
        else
                   case "$host_os" in
-                            # Guess yes on Linux systems.
-           linux-* | linux) gl_cv_func_rename_link_works="guessing yes" ;;
-                            # Guess yes on glibc systems.
-           *-gnu*)          gl_cv_func_rename_link_works="guessing yes" ;;
-                            # Guess yes on native Windows.
-           mingw*)          gl_cv_func_rename_link_works="guessing yes" ;;
-                            # If we don't know, obey --enable-cross-guesses.
-           *)               gl_cv_func_rename_link_works="$gl_cross_guess_normal" ;;
+                              # Guess yes on Linux systems.
+           linux-* | linux)   gl_cv_func_rename_link_works="guessing yes" ;;
+                              # Guess yes on systems that emulate the Linux system calls.
+           midipix*)          gl_cv_func_rename_link_works="guessing yes" ;;
+                              # Guess yes on glibc systems.
+           *-gnu*)            gl_cv_func_rename_link_works="guessing yes" ;;
+                              # Guess yes on native Windows.
+           mingw* | windows*) gl_cv_func_rename_link_works="guessing yes" ;;
+                              # If we don't know, obey --enable-cross-guesses.
+           *)                 gl_cv_func_rename_link_works="$gl_cross_guess_normal" ;;
          esac
        fi
      else
@@ -27626,14 +30310,14 @@ else $as_nop
     if test "$cross_compiling" = yes
 then :
         case "$host_os" in
-                          # Guess yes on Linux systems.
-         linux-* | linux) gl_cv_func_rename_dest_works="guessing yes" ;;
-                          # Guess yes on glibc systems.
-         *-gnu*)          gl_cv_func_rename_dest_works="guessing yes" ;;
-                          # Guess no on native Windows.
-         mingw*)          gl_cv_func_rename_dest_works="guessing no" ;;
-                          # If we don't know, obey --enable-cross-guesses.
-         *)               gl_cv_func_rename_dest_works="$gl_cross_guess_normal" ;;
+                            # Guess yes on Linux systems.
+         linux-* | linux)   gl_cv_func_rename_dest_works="guessing yes" ;;
+                            # Guess yes on glibc systems.
+         *-gnu*)            gl_cv_func_rename_dest_works="guessing yes" ;;
+                            # Guess no on native Windows.
+         mingw* | windows*) gl_cv_func_rename_dest_works="guessing no" ;;
+                            # If we don't know, obey --enable-cross-guesses.
+         *)                 gl_cv_func_rename_dest_works="$gl_cross_guess_normal" ;;
        esac
 
 else $as_nop
@@ -27735,6 +30419,74 @@ fi
   fi
 
 
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for renameat2" >&5
+printf %s "checking for renameat2... " >&6; }
+if test ${gl_cv_onwards_func_renameat2+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "renameat2" "ac_cv_have_decl_renameat2" "#include <stdio.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_renameat2" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_renameat2 = yes; then
+             ac_fn_c_check_func "$LINENO" "renameat2" "ac_cv_func_renameat2"
+if test "x$ac_cv_func_renameat2" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_renameat2 = yes; then
+               gl_cv_onwards_func_renameat2=yes
+             else
+                                                            gl_cv_onwards_func_renameat2='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_renameat2='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "renameat2" "ac_cv_func_renameat2"
+if test "x$ac_cv_func_renameat2" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_renameat2=$ac_cv_func_renameat2
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_renameat2" >&5
+printf "%s\n" "$gl_cv_onwards_func_renameat2" >&6; }
+
+  case "$gl_cv_onwards_func_renameat2" in
+    future*) ac_cv_func_renameat2=no ;;
+    *)       ac_cv_func_renameat2=$gl_cv_onwards_func_renameat2 ;;
+  esac
+  if test $ac_cv_func_renameat2 = yes; then
+
+printf "%s\n" "#define HAVE_RENAMEAT2 1" >>confdefs.h
+
+  fi
+
+
+
+
      if test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1; then
   GL_COND_OBJ_RENAMEAT_TRUE=
   GL_COND_OBJ_RENAMEAT_FALSE='#'
@@ -27798,6 +30550,74 @@ fi
         REPLACE_RENAMEAT=1
   fi
 
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for renameat2" >&5
+printf %s "checking for renameat2... " >&6; }
+if test ${gl_cv_onwards_func_renameat2+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "renameat2" "ac_cv_have_decl_renameat2" "#include <stdio.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_renameat2" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_renameat2 = yes; then
+             ac_fn_c_check_func "$LINENO" "renameat2" "ac_cv_func_renameat2"
+if test "x$ac_cv_func_renameat2" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_renameat2 = yes; then
+               gl_cv_onwards_func_renameat2=yes
+             else
+                                                            gl_cv_onwards_func_renameat2='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_renameat2='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "renameat2" "ac_cv_func_renameat2"
+if test "x$ac_cv_func_renameat2" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_renameat2=$ac_cv_func_renameat2
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_renameat2" >&5
+printf "%s\n" "$gl_cv_onwards_func_renameat2" >&6; }
+
+  case "$gl_cv_onwards_func_renameat2" in
+    future*) ac_cv_func_renameat2=no ;;
+    *)       ac_cv_func_renameat2=$gl_cv_onwards_func_renameat2 ;;
+  esac
+  if test $ac_cv_func_renameat2 = yes; then
+
+printf "%s\n" "#define HAVE_RENAMEAT2 1" >>confdefs.h
+
+  fi
+
+
+
   if test $HAVE_RENAMEAT = 0; then
 
 
@@ -27824,14 +30644,16 @@ else $as_nop
      if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                           # Guess yes on Linux systems.
-          linux-* | linux) gl_cv_func_rmdir_works="guessing yes" ;;
-                           # Guess yes on glibc systems.
-          *-gnu* | gnu*)   gl_cv_func_rmdir_works="guessing yes" ;;
-                           # Guess no on native Windows.
-          mingw*)          gl_cv_func_rmdir_works="guessing no" ;;
-                           # If we don't know, obey --enable-cross-guesses.
-          *)               gl_cv_func_rmdir_works="$gl_cross_guess_normal" ;;
+                             # Guess yes on Linux systems.
+          linux-* | linux)   gl_cv_func_rmdir_works="guessing yes" ;;
+                             # Guess yes on systems that emulate the Linux system calls.
+          midipix*)          gl_cv_func_rmdir_works="guessing yes" ;;
+                             # Guess yes on glibc systems.
+          *-gnu* | gnu*)     gl_cv_func_rmdir_works="guessing yes" ;;
+                             # Guess no on native Windows.
+          mingw* | windows*) gl_cv_func_rmdir_works="guessing no" ;;
+                             # If we don't know, obey --enable-cross-guesses.
+          *)                 gl_cv_func_rmdir_works="$gl_cross_guess_normal" ;;
         esac
 
 else $as_nop
@@ -27924,7 +30746,6 @@ printf "%s\n" "#define GNULIB_TEST_RMDIR 1" >>confdefs.h
 
 
 
-
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for signbit macro" >&5
 printf %s "checking for signbit macro... " >&6; }
 if test ${gl_cv_func_signbit+y}
@@ -27935,14 +30756,14 @@ else $as_nop
       if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                          # Guess yes on glibc systems.
-           *-gnu* | gnu*) gl_cv_func_signbit="guessing yes" ;;
-                          # Guess yes on musl systems.
-           *-musl*)       gl_cv_func_signbit="guessing yes" ;;
-                          # Guess yes on native Windows.
-           mingw*)        gl_cv_func_signbit="guessing yes" ;;
-                          # If we don't know, obey --enable-cross-guesses.
-           *)             gl_cv_func_signbit="$gl_cross_guess_normal" ;;
+                               # Guess yes on glibc systems.
+           *-gnu* | gnu*)      gl_cv_func_signbit="guessing yes" ;;
+                               # Guess yes on musl systems.
+           *-musl* | midipix*) gl_cv_func_signbit="guessing yes" ;;
+                               # Guess yes on native Windows.
+           mingw* | windows*)  gl_cv_func_signbit="guessing yes" ;;
+                               # If we don't know, obey --enable-cross-guesses.
+           *)                  gl_cv_func_signbit="$gl_cross_guess_normal" ;;
          esac
 
 else $as_nop
@@ -28060,19 +30881,19 @@ else $as_nop
       if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                          # Guess yes on glibc systems.
-           *-gnu* | gnu*) gl_cv_func_signbit_builtins="guessing yes" ;;
-                          # Guess yes on musl systems.
-           *-musl*)       gl_cv_func_signbit_builtins="guessing yes" ;;
-                          # Guess yes on mingw, no on MSVC.
-           mingw*)        if test -n "$GCC"; then
-                            gl_cv_func_signbit_builtins="guessing yes"
-                          else
-                            gl_cv_func_signbit_builtins="guessing no"
-                          fi
-                          ;;
-                          # If we don't know, obey --enable-cross-guesses.
-           *)             gl_cv_func_signbit_builtins="$gl_cross_guess_normal" ;;
+                               # Guess yes on glibc systems.
+           *-gnu* | gnu*)      gl_cv_func_signbit_builtins="guessing yes" ;;
+                               # Guess yes on musl systems.
+           *-musl* | midipix*) gl_cv_func_signbit_builtins="guessing yes" ;;
+                               # Guess yes on mingw, no on MSVC.
+           mingw* | windows*)  if test -n "$GCC"; then
+                                 gl_cv_func_signbit_builtins="guessing yes"
+                               else
+                                 gl_cv_func_signbit_builtins="guessing no"
+                               fi
+                               ;;
+                               # If we don't know, obey --enable-cross-guesses.
+           *)                  gl_cv_func_signbit_builtins="$gl_cross_guess_normal" ;;
          esac
 
 else $as_nop
@@ -28795,7 +31616,7 @@ printf "%s\n" "#define SIZE_MAX $gl_cv_size_max" >>confdefs.h
 
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ssize_t" >&5
 printf %s "checking for ssize_t... " >&6; }
-if test ${gt_cv_ssize_t+y}
+if test ${gl_cv_ssize_t+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
@@ -28813,17 +31634,51 @@ int x = sizeof (ssize_t *) + sizeof (ssize_t);
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
-  gt_cv_ssize_t=yes
+  gl_cv_ssize_t=yes
 else $as_nop
-  gt_cv_ssize_t=no
+  gl_cv_ssize_t=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gt_cv_ssize_t" >&5
-printf "%s\n" "$gt_cv_ssize_t" >&6; }
-  if test $gt_cv_ssize_t = no; then
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_ssize_t" >&5
+printf "%s\n" "$gl_cv_ssize_t" >&6; }
+  if test $gl_cv_ssize_t = no; then
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether size_t is wider than 'long'" >&5
+printf %s "checking whether size_t is wider than 'long'... " >&6; }
+if test ${gl_cv_size_t_large+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/types.h>
+              typedef int array [2 * (sizeof (size_t) > sizeof (long)) - 1];
 
-printf "%s\n" "#define ssize_t int" >>confdefs.h
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  gl_cv_size_t_large=yes
+else $as_nop
+  gl_cv_size_t_large=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_size_t_large" >&5
+printf "%s\n" "$gl_cv_size_t_large" >&6; }
+    if test $gl_cv_size_t_large = yes; then
+      gl_def_ssize_t='long long'
+    else
+      gl_def_ssize_t='long'
+    fi
+
+printf "%s\n" "#define ssize_t $gl_def_ssize_t" >>confdefs.h
 
   fi
 
@@ -28832,7 +31687,7 @@ printf "%s\n" "#define ssize_t int" >>confdefs.h
 
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                   REPLACE_STAT=1
       ;;
     *)
@@ -28852,6 +31707,8 @@ then :
   case "$host_os" in
                                # Guess yes on Linux systems.
               linux-* | linux) gl_cv_func_stat_file_slash="guessing yes" ;;
+                               # Guess yes on systems that emulate the Linux system calls.
+              midipix*)        gl_cv_func_stat_file_slash="guessing yes" ;;
                                # Guess yes on glibc systems.
               *-gnu* | gnu*)   gl_cv_func_stat_file_slash="guessing yes" ;;
                                # If we don't know, obey --enable-cross-guesses.
@@ -28902,7 +31759,7 @@ printf "%s\n" "#define REPLACE_FUNC_STAT_FILE 1" >>confdefs.h
 ;;
       esac
       case $host_os in
-                solaris*)
+                darwin* | solaris*)
           REPLACE_FSTAT=1 ;;
       esac
       ;;
@@ -28925,7 +31782,7 @@ fi
   if test -z "$GL_COND_OBJ_STAT_TRUE"; then :
 
     case "$host_os" in
-      mingw*)
+      mingw* | windows*)
 
 
 
@@ -29098,97 +31955,35 @@ fi
 
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working stdalign.h" >&5
-printf %s "checking for working stdalign.h... " >&6; }
-if test ${gl_cv_header_working_stdalign_h+y}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for bool, true, false" >&5
+printf %s "checking for bool, true, false... " >&6; }
+if test ${gl_cv_c_bool+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stdint.h>
-            #include <stdalign.h>
-            #include <stddef.h>
-
-            /* Test that alignof yields a result consistent with offsetof.
-               This catches GCC bug 52023
-               <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>.  */
-            #ifdef __cplusplus
-               template <class t> struct alignof_helper { char a; t b; };
-            # define ao(type) offsetof (alignof_helper<type>, b)
-            #else
-            # define ao(type) offsetof (struct { char a; type b; }, b)
-            #endif
-            char test_double[ao (double) % _Alignof (double) == 0 ? 1 : -1];
-            char test_long[ao (long int) % _Alignof (long int) == 0 ? 1 : -1];
-            char test_alignof[alignof (double) == _Alignof (double) ? 1 : -1];
-
-            /* Test _Alignas only on platforms where gnulib can help.  */
-            #if \
-                ((defined __cplusplus && 201103 <= __cplusplus) \
-                 || (__TINYC__ && defined __attribute__) \
-                 || (defined __APPLE__ && defined __MACH__ \
-                     ? 4 < __GNUC__ + (1 <= __GNUC_MINOR__) \
-                     : __GNUC__) \
-                 || (__ia64 && (61200 <= __HP_cc || 61200 <= __HP_aCC)) \
-                 || __ICC || 0x590 <= __SUNPRO_C || 0x0600 <= __xlC__ \
-                 || 1300 <= _MSC_VER)
-              struct alignas_test { char c; char alignas (8) alignas_8; };
-              char test_alignas[offsetof (struct alignas_test, alignas_8) == 8
-                                ? 1 : -1];
-            #endif
-
-int
-main (void)
-{
 
-  ;
-  return 0;
-}
+          #if true == false
+           #error "true == false"
+          #endif
+          extern bool b;
+          bool b = true == false;
 _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
-  gl_cv_header_working_stdalign_h=yes
+  gl_cv_c_bool=yes
 else $as_nop
-  gl_cv_header_working_stdalign_h=no
+  gl_cv_c_bool=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_header_working_stdalign_h" >&5
-printf "%s\n" "$gl_cv_header_working_stdalign_h" >&6; }
-
-  if test $gl_cv_header_working_stdalign_h = yes; then
-    GL_GENERATE_STDALIGN_H=false
-  else
-    GL_GENERATE_STDALIGN_H=true
-  fi
-
-
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_c_bool" >&5
+printf "%s\n" "$gl_cv_c_bool" >&6; }
+  if test "$gl_cv_c_bool" = yes; then
 
+printf "%s\n" "#define HAVE_C_BOOL 1" >>confdefs.h
 
-
-  case "$GL_GENERATE_STDALIGN_H" in
-    false) STDALIGN_H='' ;;
-    true)
-                  if test -z "$STDALIGN_H"; then
-        STDALIGN_H="${gl_source_base_prefix}stdalign.h"
-      fi
-      ;;
-    *) echo "*** GL_GENERATE_STDALIGN_H is not set correctly" 1>&2; exit 1 ;;
-  esac
-
-
-     if $GL_GENERATE_STDALIGN_H; then
-  GL_GENERATE_STDALIGN_H_TRUE=
-  GL_GENERATE_STDALIGN_H_FALSE='#'
-else
-  GL_GENERATE_STDALIGN_H_TRUE='#'
-  GL_GENERATE_STDALIGN_H_FALSE=
-fi
-:
-    if test -z "${GL_GENERATE_STDALIGN_H_TRUE}" && test -z "${GL_GENERATE_STDALIGN_H_FALSE}"; then
-    GL_GENERATE_STDALIGN_H_TRUE='#'
-    GL_GENERATE_STDALIGN_H_FALSE='#'
   fi
 
 
@@ -29196,60 +31991,37 @@ fi
 
 
 
-
-
-
-
-          if test "$ac_cv_header_stdbool_h" = yes; then
-    case "$host_os" in
-      solaris*)
-        if test -z "$GCC"; then
-          GL_GENERATE_STDBOOL_H=true
-        else
-          GL_GENERATE_STDBOOL_H=false
-        fi
-        ;;
-      *)
-        GL_GENERATE_STDBOOL_H=false
-        ;;
-    esac
-  else
-    GL_GENERATE_STDBOOL_H=true
-  fi
-
-  if test "$ac_cv_type__Bool" = yes; then
-    HAVE__BOOL=1
+  if test $ac_cv_header_stdckdint_h = yes; then
+    GL_GENERATE_STDCKDINT_H=false
   else
-    HAVE__BOOL=0
+    GL_GENERATE_STDCKDINT_H=true
   fi
 
 
 
 
-
-
-  case "$GL_GENERATE_STDBOOL_H" in
-    false) STDBOOL_H='' ;;
+  case "$GL_GENERATE_STDCKDINT_H" in
+    false) STDCKDINT_H='' ;;
     true)
-                  if test -z "$STDBOOL_H"; then
-        STDBOOL_H="${gl_source_base_prefix}stdbool.h"
+                  if test -z "$STDCKDINT_H"; then
+        STDCKDINT_H="${gl_source_base_prefix}stdckdint.h"
       fi
       ;;
-    *) echo "*** GL_GENERATE_STDBOOL_H is not set correctly" 1>&2; exit 1 ;;
+    *) echo "*** GL_GENERATE_STDCKDINT_H is not set correctly" 1>&2; exit 1 ;;
   esac
 
 
-     if $GL_GENERATE_STDBOOL_H; then
-  GL_GENERATE_STDBOOL_H_TRUE=
-  GL_GENERATE_STDBOOL_H_FALSE='#'
+     if $GL_GENERATE_STDCKDINT_H; then
+  GL_GENERATE_STDCKDINT_H_TRUE=
+  GL_GENERATE_STDCKDINT_H_FALSE='#'
 else
-  GL_GENERATE_STDBOOL_H_TRUE='#'
-  GL_GENERATE_STDBOOL_H_FALSE=
+  GL_GENERATE_STDCKDINT_H_TRUE='#'
+  GL_GENERATE_STDCKDINT_H_FALSE=
 fi
 :
-    if test -z "${GL_GENERATE_STDBOOL_H_TRUE}" && test -z "${GL_GENERATE_STDBOOL_H_FALSE}"; then
-    GL_GENERATE_STDBOOL_H_TRUE='#'
-    GL_GENERATE_STDBOOL_H_FALSE='#'
+    if test -z "${GL_GENERATE_STDCKDINT_H_TRUE}" && test -z "${GL_GENERATE_STDCKDINT_H_FALSE}"; then
+    GL_GENERATE_STDCKDINT_H_TRUE='#'
+    GL_GENERATE_STDCKDINT_H_FALSE='#'
   fi
 
 
@@ -30033,12 +32805,12 @@ else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                          # Guess yes on glibc systems.
-           *-gnu* | gnu*) gl_cv_func_working_strerror="guessing yes" ;;
-                          # Guess yes on musl systems.
-           *-musl*)       gl_cv_func_working_strerror="guessing yes" ;;
-                          # If we don't know, obey --enable-cross-guesses.
-           *)             gl_cv_func_working_strerror="$gl_cross_guess_normal" ;;
+                               # Guess yes on glibc systems.
+           *-gnu* | gnu*)      gl_cv_func_working_strerror="guessing yes" ;;
+                               # Guess yes on musl systems.
+           *-musl* | midipix*) gl_cv_func_working_strerror="guessing yes" ;;
+                               # If we don't know, obey --enable-cross-guesses.
+           *)                  gl_cv_func_working_strerror="$gl_cross_guess_normal" ;;
          esac
 
 else $as_nop
@@ -30249,9 +33021,13 @@ else $as_nop
   if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                    # Guess no on native Windows.
-            mingw*) gl_cv_func_strtoll_works="guessing no" ;;
-            *)      gl_cv_func_strtoll_works="$gl_cross_guess_normal" ;;
+                                # Guess no on native Windows.
+            mingw* | windows*)  gl_cv_func_strtoll_works="guessing no" ;;
+                                # Guess no on glibc systems.
+            *-gnu* | gnu*)      gl_cv_func_strtoll_works="guessing no" ;;
+                                # Guess no on musl systems.
+            *-musl* | midipix*) gl_cv_func_strtoll_works="guessing no" ;;
+            *)                  gl_cv_func_strtoll_works="$gl_cross_guess_normal" ;;
           esac
 
 else $as_nop
@@ -30265,10 +33041,23 @@ int result = 0;
               char *term;
               /* This test fails on Minix and native Windows.  */
               {
-                const char input[] = "0x";
-                (void) strtoll (input, &term, 16);
-                if (term != input + 1)
-                  result |= 1;
+                static char const input[2][3] = {"0x", "0b"};
+                static int const base[] = {0, 2, 10};
+                int i, j;
+                for (i = 0; i < 2; i++)
+                  for (j = 0; j < 3; j++)
+                    {
+                      (void) strtoll (input[i], &term, base[j]);
+                      if (term != input[i] + 1)
+                        result |= 1;
+                    }
+              }
+              /* This test fails on pre-C23 platforms.  */
+              {
+                const char input[] = "0b1";
+                (void) strtoll (input, &term, 2);
+                if (term != input + 3)
+                  result |= 2;
               }
               return result;
 
@@ -30356,6 +33145,8 @@ then :
   case "$host_os" in
                              # Guess yes on Linux systems.
             linux-* | linux) gl_cv_func_symlink_works="guessing yes" ;;
+                             # Guess yes on systems that emulate the Linux system calls.
+            midipix*)        gl_cv_func_symlink_works="guessing yes" ;;
                              # Guess yes on glibc systems.
             *-gnu* | gnu*)   gl_cv_func_symlink_works="guessing yes" ;;
                              # If we don't know, obey --enable-cross-guesses.
@@ -30443,8 +33234,78 @@ printf "%s\n" "#define GNULIB_TEST_SYMLINK 1" >>confdefs.h
 
 
 
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for symlinkat" >&5
+printf %s "checking for symlinkat... " >&6; }
+if test ${gl_cv_onwards_func_symlinkat+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "symlinkat" "ac_cv_have_decl_symlinkat" "#include <unistd.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_symlinkat" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_symlinkat = yes; then
+             ac_fn_c_check_func "$LINENO" "symlinkat" "ac_cv_func_symlinkat"
+if test "x$ac_cv_func_symlinkat" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_symlinkat = yes; then
+               gl_cv_onwards_func_symlinkat=yes
+             else
+                                                            gl_cv_onwards_func_symlinkat='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_symlinkat='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "symlinkat" "ac_cv_func_symlinkat"
+if test "x$ac_cv_func_symlinkat" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_symlinkat=$ac_cv_func_symlinkat
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_symlinkat" >&5
+printf "%s\n" "$gl_cv_onwards_func_symlinkat" >&6; }
+
+  case "$gl_cv_onwards_func_symlinkat" in
+    future*) ac_cv_func_symlinkat=no ;;
+    *)       ac_cv_func_symlinkat=$gl_cv_onwards_func_symlinkat ;;
+  esac
+  if test $ac_cv_func_symlinkat = yes; then
+
+printf "%s\n" "#define HAVE_SYMLINKAT 1" >>confdefs.h
+
+  fi
+
+
   if test $ac_cv_func_symlinkat = no; then
     HAVE_SYMLINKAT=0
+    case "$gl_cv_onwards_func_symlinkat" in
+      future*) REPLACE_SYMLINKAT=1 ;;
+    esac
   else
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether symlinkat handles trailing slash correctly" >&5
 printf %s "checking whether symlinkat handles trailing slash correctly... " >&6; }
@@ -30457,6 +33318,8 @@ then :
   case "$host_os" in
                              # Guess yes on Linux systems.
             linux-* | linux) gl_cv_func_symlinkat_works="guessing yes" ;;
+                             # Guess yes on systems that emulate the Linux system calls.
+            midipix*)        gl_cv_func_symlinkat_works="guessing yes" ;;
                              # Guess yes on glibc systems.
             *-gnu* | gnu*)   gl_cv_func_symlinkat_works="guessing yes" ;;
                              # If we don't know, obey --enable-cross-guesses.
@@ -30598,14 +33461,16 @@ else $as_nop
      if test "$cross_compiling" = yes
 then :
   case "$host_os" in
-                          # Guess yes on Linux systems.
-         linux-* | linux) gl_cv_func_unlink_honors_slashes="guessing yes" ;;
-                          # Guess yes on glibc systems.
-         *-gnu*)          gl_cv_func_unlink_honors_slashes="guessing yes" ;;
-                          # Guess no on native Windows.
-         mingw*)          gl_cv_func_unlink_honors_slashes="guessing no" ;;
-                          # If we don't know, obey --enable-cross-guesses.
-         *)               gl_cv_func_unlink_honors_slashes="$gl_cross_guess_normal" ;;
+                            # Guess yes on Linux systems.
+         linux-* | linux)   gl_cv_func_unlink_honors_slashes="guessing yes" ;;
+                            # Guess yes on systems that emulate the Linux system calls.
+         midipix*)          gl_cv_func_unlink_honors_slashes="guessing yes" ;;
+                            # Guess yes on glibc systems.
+         *-gnu*)            gl_cv_func_unlink_honors_slashes="guessing yes" ;;
+                            # Guess no on native Windows.
+         mingw* | windows*) gl_cv_func_unlink_honors_slashes="guessing no" ;;
+                            # If we don't know, obey --enable-cross-guesses.
+         *)                 gl_cv_func_unlink_honors_slashes="$gl_cross_guess_normal" ;;
        esac
 
 else $as_nop
@@ -30847,7 +33712,7 @@ printf "%s\n" "#define GNULIB_TEST_UNLINKAT 1" >>confdefs.h
 
 
   case "$host_os" in
-    mingw*)
+    mingw* | windows*)
                                     REPLACE_UTIME=1
       ;;
     *)
@@ -30984,6 +33849,345 @@ printf "%s\n" "#define GNULIB_TEST_UTIME 1" >>confdefs.h
 
 
 
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for futimes" >&5
+printf %s "checking for futimes... " >&6; }
+if test ${gl_cv_onwards_func_futimes+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "futimes" "ac_cv_have_decl_futimes" "#include <sys/time.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_futimes" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_futimes = yes; then
+             ac_fn_c_check_func "$LINENO" "futimes" "ac_cv_func_futimes"
+if test "x$ac_cv_func_futimes" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_futimes = yes; then
+               gl_cv_onwards_func_futimes=yes
+             else
+                                                            gl_cv_onwards_func_futimes='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_futimes='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "futimes" "ac_cv_func_futimes"
+if test "x$ac_cv_func_futimes" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_futimes=$ac_cv_func_futimes
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_futimes" >&5
+printf "%s\n" "$gl_cv_onwards_func_futimes" >&6; }
+
+  case "$gl_cv_onwards_func_futimes" in
+    future*) ac_cv_func_futimes=no ;;
+    *)       ac_cv_func_futimes=$gl_cv_onwards_func_futimes ;;
+  esac
+  if test $ac_cv_func_futimes = yes; then
+
+printf "%s\n" "#define HAVE_FUTIMES 1" >>confdefs.h
+
+  fi
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for futimesat" >&5
+printf %s "checking for futimesat... " >&6; }
+if test ${gl_cv_onwards_func_futimesat+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "futimesat" "ac_cv_have_decl_futimesat" "#include <sys/time.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_futimesat" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_futimesat = yes; then
+             ac_fn_c_check_func "$LINENO" "futimesat" "ac_cv_func_futimesat"
+if test "x$ac_cv_func_futimesat" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_futimesat = yes; then
+               gl_cv_onwards_func_futimesat=yes
+             else
+                                                            gl_cv_onwards_func_futimesat='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_futimesat='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "futimesat" "ac_cv_func_futimesat"
+if test "x$ac_cv_func_futimesat" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_futimesat=$ac_cv_func_futimesat
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_futimesat" >&5
+printf "%s\n" "$gl_cv_onwards_func_futimesat" >&6; }
+
+  case "$gl_cv_onwards_func_futimesat" in
+    future*) ac_cv_func_futimesat=no ;;
+    *)       ac_cv_func_futimesat=$gl_cv_onwards_func_futimesat ;;
+  esac
+  if test $ac_cv_func_futimesat = yes; then
+
+printf "%s\n" "#define HAVE_FUTIMESAT 1" >>confdefs.h
+
+  fi
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for lutimes" >&5
+printf %s "checking for lutimes... " >&6; }
+if test ${gl_cv_onwards_func_lutimes+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "lutimes" "ac_cv_have_decl_lutimes" "#include <sys/time.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_lutimes" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_lutimes = yes; then
+             ac_fn_c_check_func "$LINENO" "lutimes" "ac_cv_func_lutimes"
+if test "x$ac_cv_func_lutimes" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_lutimes = yes; then
+               gl_cv_onwards_func_lutimes=yes
+             else
+                                                            gl_cv_onwards_func_lutimes='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_lutimes='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "lutimes" "ac_cv_func_lutimes"
+if test "x$ac_cv_func_lutimes" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_lutimes=$ac_cv_func_lutimes
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_lutimes" >&5
+printf "%s\n" "$gl_cv_onwards_func_lutimes" >&6; }
+
+  case "$gl_cv_onwards_func_lutimes" in
+    future*) ac_cv_func_lutimes=no ;;
+    *)       ac_cv_func_lutimes=$gl_cv_onwards_func_lutimes ;;
+  esac
+  if test $ac_cv_func_lutimes = yes; then
+
+printf "%s\n" "#define HAVE_LUTIMES 1" >>confdefs.h
+
+  fi
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for futimens" >&5
+printf %s "checking for futimens... " >&6; }
+if test ${gl_cv_onwards_func_futimens+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "futimens" "ac_cv_have_decl_futimens" "#include <sys/stat.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_futimens" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_futimens = yes; then
+             ac_fn_c_check_func "$LINENO" "futimens" "ac_cv_func_futimens"
+if test "x$ac_cv_func_futimens" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_futimens = yes; then
+               gl_cv_onwards_func_futimens=yes
+             else
+                                                            gl_cv_onwards_func_futimens='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_futimens='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "futimens" "ac_cv_func_futimens"
+if test "x$ac_cv_func_futimens" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_futimens=$ac_cv_func_futimens
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_futimens" >&5
+printf "%s\n" "$gl_cv_onwards_func_futimens" >&6; }
+
+  case "$gl_cv_onwards_func_futimens" in
+    future*) ac_cv_func_futimens=no ;;
+    *)       ac_cv_func_futimens=$gl_cv_onwards_func_futimens ;;
+  esac
+  if test $ac_cv_func_futimens = yes; then
+
+printf "%s\n" "#define HAVE_FUTIMENS 1" >>confdefs.h
+
+  fi
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for utimensat" >&5
+printf %s "checking for utimensat... " >&6; }
+if test ${gl_cv_onwards_func_utimensat+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "utimensat" "ac_cv_have_decl_utimensat" "#include <sys/stat.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_utimensat" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_utimensat = yes; then
+             ac_fn_c_check_func "$LINENO" "utimensat" "ac_cv_func_utimensat"
+if test "x$ac_cv_func_utimensat" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_utimensat = yes; then
+               gl_cv_onwards_func_utimensat=yes
+             else
+                                                            gl_cv_onwards_func_utimensat='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_utimensat='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "utimensat" "ac_cv_func_utimensat"
+if test "x$ac_cv_func_utimensat" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_utimensat=$ac_cv_func_utimensat
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_utimensat" >&5
+printf "%s\n" "$gl_cv_onwards_func_utimensat" >&6; }
+
+  case "$gl_cv_onwards_func_utimensat" in
+    future*) ac_cv_func_utimensat=no ;;
+    *)       ac_cv_func_utimensat=$gl_cv_onwards_func_utimensat ;;
+  esac
+  if test $ac_cv_func_utimensat = yes; then
+
+printf "%s\n" "#define HAVE_UTIMENSAT 1" >>confdefs.h
+
+  fi
+
+
+
   if test $ac_cv_func_futimens = no && test $ac_cv_func_futimesat = yes; then
                 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether futimesat handles NULL file" >&5
 printf %s "checking whether futimesat handles NULL file... " >&6; }
@@ -31053,8 +34257,78 @@ printf "%s\n" "#define FUTIMESAT_NULL_BUG 1" >>confdefs.h
 
 
 
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for utimensat" >&5
+printf %s "checking for utimensat... " >&6; }
+if test ${gl_cv_onwards_func_utimensat+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "utimensat" "ac_cv_have_decl_utimensat" "#include <sys/stat.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_utimensat" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_utimensat = yes; then
+             ac_fn_c_check_func "$LINENO" "utimensat" "ac_cv_func_utimensat"
+if test "x$ac_cv_func_utimensat" = xyes
+then :
+
+fi
+
+             if test $ac_cv_func_utimensat = yes; then
+               gl_cv_onwards_func_utimensat=yes
+             else
+                                                            gl_cv_onwards_func_utimensat='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_utimensat='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "utimensat" "ac_cv_func_utimensat"
+if test "x$ac_cv_func_utimensat" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_utimensat=$ac_cv_func_utimensat
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_utimensat" >&5
+printf "%s\n" "$gl_cv_onwards_func_utimensat" >&6; }
+
+  case "$gl_cv_onwards_func_utimensat" in
+    future*) ac_cv_func_utimensat=no ;;
+    *)       ac_cv_func_utimensat=$gl_cv_onwards_func_utimensat ;;
+  esac
+  if test $ac_cv_func_utimensat = yes; then
+
+printf "%s\n" "#define HAVE_UTIMENSAT 1" >>confdefs.h
+
+  fi
+
+
   if test $ac_cv_func_utimensat = no; then
     HAVE_UTIMENSAT=0
+    case "$gl_cv_onwards_func_utimensat" in
+      future*) REPLACE_UTIMENSAT=1 ;;
+    esac
   else
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether utimensat works" >&5
 printf %s "checking whether utimensat works... " >&6; }
@@ -31441,92 +34715,12 @@ printf "%s\n" "#define GNULIB_TEST_VASPRINTF 1" >>confdefs.h
 
 
 
+  if test $gl_cv_func_vasprintf_posix = no; then
 
 
 
 
 
-
-
-
-
-
-
-
-
-  gl_cv_func_vasprintf_posix=no
-  ac_fn_c_check_func "$LINENO" "vasprintf" "ac_cv_func_vasprintf"
-if test "x$ac_cv_func_vasprintf" = xyes
-then :
-  printf "%s\n" "#define HAVE_VASPRINTF 1" >>confdefs.h
-
-fi
-
-  case "$gl_cv_func_printf_sizes_c99" in
-    *yes)
-      case "$gl_cv_func_printf_long_double" in
-        *yes)
-          case "$gl_cv_func_printf_infinite" in
-            *yes)
-              case "$gl_cv_func_printf_infinite_long_double" in
-                *yes)
-                  case "$gl_cv_func_printf_directive_a" in
-                    *yes)
-                      case "$gl_cv_func_printf_directive_f" in
-                        *yes)
-                          case "$gl_cv_func_printf_directive_n" in
-                            *yes)
-                              case "$gl_cv_func_printf_directive_ls" in
-                                *yes)
-                                  case "$gl_cv_func_printf_positions" in
-                                    *yes)
-                                      case "$gl_cv_func_printf_flag_grouping" in
-                                        *yes)
-                                          case "$gl_cv_func_printf_flag_leftadjust" in
-                                            *yes)
-                                              case "$gl_cv_func_printf_flag_zero" in
-                                                *yes)
-                                                  case "$gl_cv_func_printf_precision" in
-                                                    *yes)
-                                                      case "$gl_cv_func_printf_enomem" in
-                                                        *yes)
-                                                          if test $ac_cv_func_vasprintf = yes; then
-                                                            # vasprintf exists and is
-                                                            # already POSIX compliant.
-                                                            gl_cv_func_vasprintf_posix=yes
-                                                          fi
-                                                          ;;
-                                                      esac
-                                                      ;;
-                                                  esac
-                                                  ;;
-                                              esac
-                                              ;;
-                                          esac
-                                          ;;
-                                      esac
-                                      ;;
-                                  esac
-                                  ;;
-                              esac
-                              ;;
-                          esac
-                          ;;
-                      esac
-                      ;;
-                  esac
-                  ;;
-              esac
-              ;;
-          esac
-          ;;
-      esac
-      ;;
-  esac
-  if test $gl_cv_func_vasprintf_posix = no; then
-
-
-
   case "$gl_cv_func_printf_infinite" in
     *yes)
       ;;
@@ -31563,13 +34757,86 @@ printf "%s\n" "#define NEED_PRINTF_INFINITE_LONG_DOUBLE 1" >>confdefs.h
 
 printf "%s\n" "#define NEED_PRINTF_DIRECTIVE_A 1" >>confdefs.h
 
-      ac_fn_c_check_func "$LINENO" "nl_langinfo" "ac_cv_func_nl_langinfo"
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for nl_langinfo" >&5
+printf %s "checking for nl_langinfo... " >&6; }
+if test ${gl_cv_onwards_func_nl_langinfo+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+  exec 9>&6 6>/dev/null
+
+       case "$host_os" in
+
+         linux*-android*)
+           ac_fn_check_decl "$LINENO" "nl_langinfo" "ac_cv_have_decl_nl_langinfo" "#include <langinfo.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_nl_langinfo" = xyes
+then :
+
+fi
+           if test $ac_cv_have_decl_nl_langinfo = yes; then
+             ac_fn_c_check_func "$LINENO" "nl_langinfo" "ac_cv_func_nl_langinfo"
 if test "x$ac_cv_func_nl_langinfo" = xyes
 then :
-  printf "%s\n" "#define HAVE_NL_LANGINFO 1" >>confdefs.h
 
 fi
 
+             if test $ac_cv_func_nl_langinfo = yes; then
+               gl_cv_onwards_func_nl_langinfo=yes
+             else
+                                                            gl_cv_onwards_func_nl_langinfo='future OS version'
+             fi
+           else
+             gl_cv_onwards_func_nl_langinfo='future OS version'
+           fi
+           ;;
+
+
+         *)
+           ac_fn_c_check_func "$LINENO" "nl_langinfo" "ac_cv_func_nl_langinfo"
+if test "x$ac_cv_func_nl_langinfo" = xyes
+then :
+
+fi
+
+           gl_cv_onwards_func_nl_langinfo=$ac_cv_func_nl_langinfo
+           ;;
+
+       esac
+
+  exec 6>&9 9>&-
+
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $gl_cv_onwards_func_nl_langinfo" >&5
+printf "%s\n" "$gl_cv_onwards_func_nl_langinfo" >&6; }
+
+  case "$gl_cv_onwards_func_nl_langinfo" in
+    future*) ac_cv_func_nl_langinfo=no ;;
+    *)       ac_cv_func_nl_langinfo=$gl_cv_onwards_func_nl_langinfo ;;
+  esac
+  if test $ac_cv_func_nl_langinfo = yes; then
+
+printf "%s\n" "#define HAVE_NL_LANGINFO 1" >>confdefs.h
+
+  fi
+
+
+      ;;
+  esac
+
+
+
+  case "$gl_cv_func_printf_directive_b" in
+    *yes)
+      ;;
+    *)
+
+printf "%s\n" "#define NEED_PRINTF_DIRECTIVE_B 1" >>confdefs.h
+
       ;;
   esac
 
@@ -31599,6 +34866,18 @@ printf "%s\n" "#define NEED_PRINTF_DIRECTIVE_LS 1" >>confdefs.h
 
 
 
+  case "$gl_cv_func_printf_directive_lc" in
+    *yes)
+      ;;
+    *)
+
+printf "%s\n" "#define NEED_PRINTF_DIRECTIVE_LC 1" >>confdefs.h
+
+      ;;
+  esac
+
+
+
   case "$gl_cv_func_printf_flag_grouping" in
     *yes)
       ;;
@@ -31635,6 +34914,18 @@ printf "%s\n" "#define NEED_PRINTF_FLAG_ZERO 1" >>confdefs.h
 
 
 
+  case "$gl_cv_func_printf_flag_alt_precision_zero" in
+    *yes)
+      ;;
+    *)
+
+printf "%s\n" "#define NEED_PRINTF_FLAG_ALT_PRECISION_ZERO 1" >>confdefs.h
+
+      ;;
+  esac
+
+
+
   case "$gl_cv_func_printf_precision" in
     *yes)
       ;;
@@ -31679,6 +34970,7 @@ printf "%s\n" "#define NEED_PRINTF_LONG_DOUBLE 1" >>confdefs.h
 
 
 
+
   gl_LIBOBJS="$gl_LIBOBJS vasnprintf.$ac_objext"
 
 
@@ -32141,8 +35433,14 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char sendfile ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char sendfile (void);
 int
 main (void)
 {
@@ -32436,8 +35734,8 @@ then :
 
 
 pkg_failed=no
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for LIBSSL" >&5
-printf %s "checking for LIBSSL... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libcrypto" >&5
+printf %s "checking for libcrypto... " >&6; }
 
 if test -n "$LIBSSL_CFLAGS"; then
     pkg_cv_LIBSSL_CFLAGS="$LIBSSL_CFLAGS"
@@ -32477,7 +35775,7 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
@@ -32486,12 +35784,12 @@ else
         _pkg_short_errors_supported=no
 fi
         if test $_pkg_short_errors_supported = yes; then
-	        LIBSSL_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libcrypto" 2>&1`
+                LIBSSL_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libcrypto" 2>&1`
         else
-	        LIBSSL_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libcrypto" 2>&1`
+                LIBSSL_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libcrypto" 2>&1`
         fi
-	# Put the nasty error message in config.log where it belongs
-	echo "$LIBSSL_PKG_ERRORS" >&5
+        # Put the nasty error message in config.log where it belongs
+        echo "$LIBSSL_PKG_ERRORS" >&5
 
 
     if test "x${enable_qmanifest}" = "xyes"
@@ -32515,7 +35813,7 @@ fi
     LIBSSL="no: missing dependencies"
 
 elif test $pkg_failed = untried; then
-     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
     if test "x${enable_qmanifest}" = "xyes"
@@ -32539,8 +35837,8 @@ fi
     LIBSSL="no: missing dependencies"
 
 else
-	LIBSSL_CFLAGS=$pkg_cv_LIBSSL_CFLAGS
-	LIBSSL_LIBS=$pkg_cv_LIBSSL_LIBS
+        LIBSSL_CFLAGS=$pkg_cv_LIBSSL_CFLAGS
+        LIBSSL_LIBS=$pkg_cv_LIBSSL_LIBS
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
@@ -32569,8 +35867,8 @@ then :
 
 
 pkg_failed=no
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for LIBBL2" >&5
-printf %s "checking for LIBBL2... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libb2" >&5
+printf %s "checking for libb2... " >&6; }
 
 if test -n "$LIBBL2_CFLAGS"; then
     pkg_cv_LIBBL2_CFLAGS="$LIBBL2_CFLAGS"
@@ -32610,7 +35908,7 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
@@ -32619,12 +35917,12 @@ else
         _pkg_short_errors_supported=no
 fi
         if test $_pkg_short_errors_supported = yes; then
-	        LIBBL2_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libb2" 2>&1`
+                LIBBL2_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libb2" 2>&1`
         else
-	        LIBBL2_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libb2" 2>&1`
+                LIBBL2_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libb2" 2>&1`
         fi
-	# Put the nasty error message in config.log where it belongs
-	echo "$LIBBL2_PKG_ERRORS" >&5
+        # Put the nasty error message in config.log where it belongs
+        echo "$LIBBL2_PKG_ERRORS" >&5
 
 
     if test "x${enable_qmanifest}" = "xyes"
@@ -32639,7 +35937,7 @@ fi
     LIBBL2="no: missing dependencies"
 
 elif test $pkg_failed = untried; then
-     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
     if test "x${enable_qmanifest}" = "xyes"
@@ -32654,8 +35952,8 @@ fi
     LIBBL2="no: missing dependencies"
 
 else
-	LIBBL2_CFLAGS=$pkg_cv_LIBBL2_CFLAGS
-	LIBBL2_LIBS=$pkg_cv_LIBBL2_LIBS
+        LIBBL2_CFLAGS=$pkg_cv_LIBBL2_CFLAGS
+        LIBBL2_LIBS=$pkg_cv_LIBBL2_LIBS
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
@@ -32668,8 +35966,8 @@ fi
 
 
 pkg_failed=no
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for LIBZ" >&5
-printf %s "checking for LIBZ... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for zlib" >&5
+printf %s "checking for zlib... " >&6; }
 
 if test -n "$LIBZ_CFLAGS"; then
     pkg_cv_LIBZ_CFLAGS="$LIBZ_CFLAGS"
@@ -32709,7 +36007,7 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
@@ -32718,12 +36016,12 @@ else
         _pkg_short_errors_supported=no
 fi
         if test $_pkg_short_errors_supported = yes; then
-	        LIBZ_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "zlib" 2>&1`
+                LIBZ_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "zlib" 2>&1`
         else
-	        LIBZ_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "zlib" 2>&1`
+                LIBZ_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "zlib" 2>&1`
         fi
-	# Put the nasty error message in config.log where it belongs
-	echo "$LIBZ_PKG_ERRORS" >&5
+        # Put the nasty error message in config.log where it belongs
+        echo "$LIBZ_PKG_ERRORS" >&5
 
 
     if test "x${enable_qmanifest}" = "xyes"
@@ -32738,7 +36036,7 @@ fi
     LIBZ="no: missing dependencies"
 
 elif test $pkg_failed = untried; then
-     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
     if test "x${enable_qmanifest}" = "xyes"
@@ -32753,8 +36051,8 @@ fi
     LIBZ="no: missing dependencies"
 
 else
-	LIBZ_CFLAGS=$pkg_cv_LIBZ_CFLAGS
-	LIBZ_LIBS=$pkg_cv_LIBZ_LIBS
+        LIBZ_CFLAGS=$pkg_cv_LIBZ_CFLAGS
+        LIBZ_LIBS=$pkg_cv_LIBZ_LIBS
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
@@ -32767,8 +36065,8 @@ fi
 
 
 pkg_failed=no
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GPGME" >&5
-printf %s "checking for GPGME... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gpgme" >&5
+printf %s "checking for gpgme... " >&6; }
 
 if test -n "$GPGME_CFLAGS"; then
     pkg_cv_GPGME_CFLAGS="$GPGME_CFLAGS"
@@ -32808,7 +36106,7 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
@@ -32817,12 +36115,12 @@ else
         _pkg_short_errors_supported=no
 fi
         if test $_pkg_short_errors_supported = yes; then
-	        GPGME_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "gpgme" 2>&1`
+                GPGME_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "gpgme" 2>&1`
         else
-	        GPGME_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "gpgme" 2>&1`
+                GPGME_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "gpgme" 2>&1`
         fi
-	# Put the nasty error message in config.log where it belongs
-	echo "$GPGME_PKG_ERRORS" >&5
+        # Put the nasty error message in config.log where it belongs
+        echo "$GPGME_PKG_ERRORS" >&5
 
 
     if test "x${enable_qmanifest}" = "xyes"
@@ -32837,7 +36135,7 @@ fi
     GPGME="no: missing dependencies"
 
 elif test $pkg_failed = untried; then
-     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 
     if test "x${enable_qmanifest}" = "xyes"
@@ -32852,8 +36150,8 @@ fi
     GPGME="no: missing dependencies"
 
 else
-	GPGME_CFLAGS=$pkg_cv_GPGME_CFLAGS
-	GPGME_LIBS=$pkg_cv_GPGME_LIBS
+        GPGME_CFLAGS=$pkg_cv_GPGME_CFLAGS
+        GPGME_LIBS=$pkg_cv_GPGME_LIBS
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
 
@@ -33925,6 +37223,12 @@ if test -z "${am__fastdepCC_TRUE}" && test -z "${am__fastdepCC_FALSE}"; then
   as_fn_error $? "conditional \"am__fastdepCC\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+# Check whether --enable-year2038 was given.
+if test ${enable_year2038+y}
+then :
+  enableval=$enable_year2038;
+fi
+
 if test -z "${GL_COND_LIBTOOL_TRUE}" && test -z "${GL_COND_LIBTOOL_FALSE}"; then
   as_fn_error $? "conditional \"GL_COND_LIBTOOL\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5