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AC_PREREQ([2.59])
AC_INIT([sandbox], [1.2.18.1], [sandbox@gentoo.org])
AM_INIT_AUTOMAKE
AC_CONFIG_HEADER([config.h])
dnl Checks for programs.
AC_PROG_CC
AC_ISC_POSIX
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_AWK
AC_CHECK_PROGS([READELF], [readelf eu-readelf], [false])
AC_ENABLE_SHARED
AC_DISABLE_STATIC
dnl Next four lines is a hack to prevent libtool checking for CXX/F77
m4_undefine([AC_PROG_CXX])
m4_defun([AC_PROG_CXX],[])
m4_undefine([AC_PROG_F77])
m4_defun([AC_PROG_F77],[])
AC_PROG_LIBTOOL
AC_PREFIX_DEFAULT([/usr])
dnl Checks for libraries.
dnl Checks for header files.
AC_FUNC_ALLOCA
AC_HEADER_DIRENT
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS([ \
fcntl.h limits.h memory.h stddef.h \
stdlib.h string.h strings.h sys/file.h \
sys/param.h sys/time.h unistd.h utime.h \
])
dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_UID_T
AC_TYPE_MODE_T
AC_TYPE_SIZE_T
AC_CHECK_TYPES([ptrdiff_t])
dnl Checks for library functions.
AC_FUNC_CHOWN
AC_FUNC_FORK
AC_FUNC_LSTAT
AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
AC_TYPE_SIGNAL
AC_FUNC_STAT
AC_CHECK_FUNCS([ \
bzero ftruncate getcwd lchown memmove \
memcpy memset mkdir pathconf realpath \
rmdir setenv strcasecmp strchr strdup \
strerror strndup strrchr strspn strstr \
strtok_r \
])
dnl Verify people aren't doing stupid shit
if test x"$enable_static" != xno ; then
AC_MSG_ERROR([dont be a Kumba, building a libsandbox.a is stupid])
fi
if test x"$enable_shared" != xyes ; then
AC_MSG_ERROR([dont be a Kumba, omitting a libsandbox.so is stupid])
fi
if echo $CFLAGS | $EGREP -e -static >/dev/null 2>&1; then
AC_MSG_ERROR([dont be a Kumba, using -static in CFLAGS is stupid])
fi
if echo $LDFLAGS | $EGREP -e -static >/dev/null 2>&1; then
AC_MSG_ERROR([dont be a Kumba, using -static in LDFLAGS is stupid])
fi
dnl Some libc's like those on bsd have dlopen() in libc, and not libdl
AC_CHECK_LIB([dl], [dlopen],
[have_libdl="yes"],
[have_libdl="no"]
)
if test x"$have_libdl" = xyes ; then
LIBDL="-ldl"
AC_SUBST([LIBDL])
DL_LIB="dl"
else
DL_LIB="c"
AC_CHECK_LIB([c], [dlopen],
[],
[AC_MSG_ERROR([Unable to determine library providing dlopen])]
)
fi
dnl uClibc doesn't currently provide dlvsym() so lets
dnl verify the toolchain supports it
AC_CHECK_LIB([$DL_LIB], [dlvsym],
[AC_DEFINE([HAVE_DLVSYM], [1], [libdl supports dlvsym])],
[AC_DEFINE([HAVE_DLVSYM], [0], [libdl does not support dlvsym])]
)
dnl when using libc5, (f)trucate's offset argument type is size_t with
dnl libc5, but it's off_t with libc6 (glibc2).
AC_MSG_CHECKING([truncate argument type])
TRUNC_ARG_TYPE=`echo '#include <unistd.h>' | $CC -E - | grep -q 'truncate.*size_t'`
if test "$TRUNC_ARG_TYPE"x != x ; then
AC_MSG_RESULT([size_t])
AC_DEFINE([TRUNCATE_T], [size_t], [truncate arg type])
else
AC_MSG_RESULT([off_t])
AC_DEFINE([TRUNCATE_T], [off_t], [truncate arg type])
fi
dnl Check if libc provides RTLD_NEXT
AC_MSG_CHECKING([for RTLD_NEXT])
AC_TRY_COMPILE([
#define _GNU_SOURCE
#include <dlfcn.h>
], [
#if !defined(RTLD_NEXT)
# error no RTLD_NEXT
#endif
],
[have_rtld_next="yes"],
[have_rtld_next="no"]
)
AC_MSG_RESULT([$have_rtld_next])
if test x"$have_rtld_next" = xyes ; then
AC_DEFINE([HAVE_RTLD_NEXT], [1], [Have RTLD_NEXT enabled libc])
fi
dnl we need to handle symbols differently based upon their version,
dnl but we have to know which symbols the libc supports first
AC_MSG_CHECKING([libc path])
echo "int main(void) { return 0; }" > libctest.c
$CC $CFLAGS -Wl,-verbose -o libctest libctest.c &> libctest.log
cat libctest.log 1>&AS_MESSAGE_LOG_FD
LIBC_PATH=`$AWK '/attempt to open/ { if (($4 ~ /\/libc\.so/) && ($5 == "succeeded")) LIBC = $4; }; END {print LIBC}' libctest.log`
rm -f libctest*
if test x"$LIBC_PATH" = x || ! test -r "$LIBC_PATH" ; then
AC_MSG_ERROR([Unable to determine LIBC PATH ($LIBC_PATH)])
fi
AC_MSG_RESULT([$LIBC_PATH])
AC_SUBST([LIBC_PATH])
dnl when intercepting libc calls, we have to know the name of the
dnl libc to load and search with dl*() calls
AC_MSG_CHECKING([libc version])
dnl the sed script at the end here looks funny but it's ok ...
dnl they're m4 escape sequences for left and right brackets
echo "int main(void) { return 0; }" > libctest.c
$CC -Wall -o libctest libctest.c
LIBC_VERSION=`$READELF -d libctest | grep NEEDED.*libc\\.so | $AWK '{print $NF}' | sed -e 's:\@<:@::' -e 's:\@:>@::'`
rm -f libctest*
if test "$LIBC_VERSION"x = x ; then
AC_MSG_ERROR([Unable to determine LIBC VERSION])
fi
AC_MSG_RESULT([$LIBC_VERSION])
AC_DEFINE_UNQUOTED([LIBC_VERSION], ["$LIBC_VERSION"], [Name of libc to hook into])
dnl check if we have 32bit or 64bit output
AC_ARG_ENABLE([multilib],
AS_HELP_STRING([--enable-multilib],
[enable building for multilib setups (default=disabled)]),
[enable_multilib="$enableval"],
[enable_multilib="no"]
)
if test x"$enable_multilib" != xno ; then
AC_DEFINE([SB_HAVE_MULTILIB], [1], [Have multilib enabled system])
fi
AC_OUTPUT([
Makefile
scripts/Makefile
data/Makefile
src/Makefile
])
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