# Copyright 1999-2017 Gentoo Foundation # Distributed under the terms of the GNU General Public License v2 # Robin H. Johnson <robbat2@gentoo.org>, 12 Nov 2007: # This still needs major work. # But it is significently better than the previous version. # In that it will now build on biarch systems, such as ppc64-32ul. # NOTES: # ====== # We need to bring in the kernel sources seperately # Because they have to be configured in a way that differs from the copy in # /usr/src/. The sys-kernel/linux-headers are too stripped down to use # unfortunately. # This will be able to go away once the klibc author updates his code # to build again the headers provided by the kernel's 'headers_install' target. EAPI=6 K_TARBALL_SUFFIX="xz" inherit eutils toolchain-funcs flag-o-matic DESCRIPTION="A minimal libc subset for use with initramfs" HOMEPAGE="http://www.zytor.com/mailman/listinfo/klibc/ https://www.kernel.org/pub/linux/libs/klibc/" KV_MAJOR="4" KV_MINOR="x" KV_SUB="4" PKV_EXTRA="" if [[ ${PKV_EXTRA} ]]; then if [[ ${KV_MAJOR} == 2 ]]; then PKV="${KV_MAJOR}.${KV_MINOR}.$((${KV_SUB}+1))-${PKV_EXTRA}" else PKV="${KV_MAJOR}.$((${KV_SUB}+1))-${PKV_EXTRA}" fi PATCH_URI="mirror://kernel/linux/kernel/v${KV_MAJOR}.${KV_MINOR}/patch-${PKV}.${K_TARBALL_SUFFIX}" fi if [[ ${KV_MAJOR} == 2 ]]; then OKV="${KV_MAJOR}.${KV_MINOR}.${KV_SUB}" else OKV="${KV_MAJOR}.${KV_SUB}" fi KERNEL_URI=" mirror://kernel/linux/kernel/v${KV_MAJOR}.${KV_MINOR}/linux-${OKV}.tar.${K_TARBALL_SUFFIX} mirror://kernel/linux/kernel/v${KV_MAJOR}.${KV_MINOR}/testing/linux-${OKV}.tar.${K_TARBALL_SUFFIX}" DEBIAN_PV=2.0.4 DEBIAN_PR=9 DEBIAN_A="${PN}_${DEBIAN_PV}-${DEBIAN_PR}.debian.tar.xz" SRC_URI=" mirror://kernel/linux/libs/klibc/${PV:0:3}/${P}.tar.${K_TARBALL_SUFFIX} mirror://debian/pool/main/k/klibc/${DEBIAN_A} ${PATCH_URI} ${KERNEL_URI}" LICENSE="|| ( GPL-2 LGPL-2 )" KEYWORDS="~alpha amd64 ~arm ia64 -mips ~ppc ~ppc64 ~sparc x86" SLOT="0" IUSE="debug test custom-cflags" DEPEND="dev-lang/perl" RDEPEND="${DEPEND}" KS="${WORKDIR}/linux-${OKV}" # Klibc has no PT_GNU_STACK support, so scanning for execstacks is moot QA_EXECSTACK="*" # Do not strip RESTRICT="strip" kernel_asm_arch() { a="${1:${ARCH}}" case ${a} in # Merged arches x86) echo i386 ;; # for build on x86 userspace & 64bit kernel amd64) echo x86 ;; ppc*) echo powerpc ;; # Non-merged alpha|arm|arm64|ia64|m68k|mips|sh|sparc*) echo ${1} ;; *) die "TODO: Update the code for your asm-ARCH symlink" ;; esac } # For a given Gentoo ARCH, # specify the kernel defconfig most relevant kernel_defconfig() { a="${1:${ARCH}}" # most, but not all arches have a sanely named defconfig case ${a} in ppc64) echo ppc64_defconfig ;; ppc) echo pmac32_defconfig ;; sh*) die "TODO: Your arch is not supported by the klibc ebuild. Please suggest a defconfig in a bug." ;; *) echo defconfig ;; esac } src_unpack() { unpack linux-${OKV}.tar.${K_TARBALL_SUFFIX} ${P}.tar.${K_TARBALL_SUFFIX} ${DEBIAN_A} } PATCHES=( # Build interp.o with EXTRA_KLIBCAFLAGS (.S source) "${FILESDIR}"/${PN}-1.4.11-interp-flags.patch # Fix usage of -s, bug #201006 "${FILESDIR}"/klibc-1.5.7-strip-fix-dash-s.patch # The inline definition from sys/stat.h does not seem to get used # So just copy it to make this compile for now "${FILESDIR}"/klibc-2.0.2-mkfifo.patch # Newer kernels have some headers in the uapi dir "${FILESDIR}"/klibc-2.0.3-kernel-uapi.patch ) src_prepare() { [[ ${PKV} ]] && eapply "${DISTDIR}"/patch-${PKV}.${K_TARBALL_SUFFIX} # Symlink /usr/src/linux to ${S}/linux ln -snf "${KS}" linux #ln -snf "/usr" linux # Borrow the debian fixes too for p in $(<"${WORKDIR}"/debian/patches/series) ; do PATCHES+=( "${WORKDIR}/debian/patches/${p}" ) done default } # klibc has it's own ideas of arches # They reflect userspace strictly. # This functions maps from a Gentoo ARCH, to an arch that klibc expects # Look at klibc-${S}/usr/klibc/arch for a list of these arches klibc_arch() { a="${1:${ARCH}}" case ${a} in amd64) echo x86_64;; mips) die 'TODO: Use the $ABI' ;; x86) echo i386;; *) echo ${a} ;; esac } src_compile() { local myargs="all" local myARCH="${ARCH}" myABI="${ABI}" # TODO: For cross-compiling # You should set ARCH and ABI here CC="$(tc-getCC)" LD="$(tc-getLD)" HOSTCC="$(tc-getBUILD_CC)" HOSTLD="$(tc-getBUILD_LD)" KLIBCARCH="$(klibc_arch ${ARCH})" KLIBCASMARCH="$(kernel_asm_arch ${ARCH})" libdir="$(get_libdir)" # This should be the defconfig corresponding to your userspace! # NOT your kernel. PPC64-32ul would choose 'ppc' for example. defconfig=$(kernel_defconfig ${ARCH}) unset ABI ARCH # Unset these, because they interfere unset KBUILD_OUTPUT # we are using a private copy cd "${KS}" emake ${defconfig} CC="${CC}" HOSTCC="${HOSTCC}" ARCH="${KLIBCASMARCH}" || die "No defconfig" if [[ "${KLIBCARCH/arm}" != "${KLIBCARCH}" ]] && \ [[ "${CHOST/eabi}" != "${CHOST}" ]]; then # The delete and insert are seperate statements # so that they are reliably used. sed -i \ -e '/CONFIG_AEABI/d' \ -e '1iCONFIG_AEABI=y' \ -e '/CONFIG_OABI_COMPAT/d' \ -e '1iCONFIG_OABI_COMPAT=y' \ -e '1iCONFIG_ARM_UNWIND=y' \ "${KS}"/.config \ "${S}"/defconfig fi emake prepare CC="${CC}" HOSTCC="${HOSTCC}" ARCH="${KLIBCASMARCH}" || die "Failed to prepare kernel sources for header usage" cd "${S}" use debug && myargs="${myargs} V=1" use test && myargs="${myargs} test" append-ldflags -z noexecstack append-flags -nostdlib emake \ EXTRA_KLIBCAFLAGS="-Wa,--noexecstack" \ EXTRA_KLIBCLDFLAGS="-z noexecstack" \ HOSTLDFLAGS="-z noexecstack" \ KLIBCOPTFLAGS='-nostdlib' \ HOSTCC="${HOSTCC}" CC="${CC}" \ HOSTLD="${HOSTLD}" LD="${LD}" \ INSTALLDIR="/usr/${libdir}/klibc" \ KLIBCARCH=${KLIBCARCH} \ KLIBCASMARCH=${KLIBCASMARCH} \ SHLIBDIR="/${libdir}" \ libdir="/usr/${libdir}" \ mandir="/usr/share/man" \ T="${T}" \ $(use custom-cflags || echo SKIP_)HOSTCFLAGS="${CFLAGS}" \ $(use custom-cflags || echo SKIP_)HOSTLDFLAGS="${LDFLAGS}" \ $(use custom-cflags || echo SKIP_)KLIBCOPTFLAGS="${CFLAGS}" \ ${myargs} || die "Compile failed!" #SHLIBDIR="/${libdir}" \ ARCH="${myARCH}" ABI="${myABI}" } src_install() { local myargs local myARCH="${ARCH}" myABI="${ABI}" # TODO: For cross-compiling # You should set ARCH and ABI here CC="$(tc-getCC)" HOSTCC="$(tc-getBUILD_CC)" KLIBCARCH="$(klibc_arch ${ARCH})" KLIBCASMARCH="$(kernel_asm_arch ${ARCH})" libdir="$(get_libdir)" # This should be the defconfig corresponding to your userspace! # NOT your kernel. PPC64-32ul would choose 'ppc' for example. defconfig=$(kernel_defconfig ${ARCH}) use debug && myargs="${myargs} V=1" local klibc_prefix if tc-is-cross-compiler ; then klibc_prefix=$("${S}/klcc/${KLIBCARCH}-klcc" -print-klibc-prefix) else klibc_prefix=$("${S}/klcc/klcc" -print-klibc-prefix) fi unset ABI ARCH # Unset these, because they interfere unset KBUILD_OUTPUT # we are using a private copy emake \ EXTRA_KLIBCAFLAGS="-Wa,--noexecstack" \ EXTRA_KLIBCLDFLAGS="-z noexecstack" \ HOSTLDFLAGS="-z noexecstack" \ KLIBCOPTFLAGS='-nostdlib' \ HOSTCC="${HOSTCC}" CC="${CC}" \ HOSTLD="${HOSTLD}" LD="${LD}" \ INSTALLDIR="/usr/${libdir}/klibc" \ INSTALLROOT="${D}" \ KLIBCARCH=${KLIBCARCH} \ KLIBCASMARCH=${KLIBCASMARCH} \ SHLIBDIR="/${libdir}" \ libdir="/usr/${libdir}" \ mandir="/usr/share/man" \ T="${T}" \ $(use custom-cflags || echo SKIP_)HOSTCFLAGS="${CFLAGS}" \ $(use custom-cflags || echo SKIP_)HOSTLDFLAGS="${LDFLAGS}" \ $(use custom-cflags || echo SKIP_)KLIBCOPTFLAGS="${CFLAGS}" \ ${myargs} \ install || die "Install failed!" #SHLIBDIR="/${libdir}" \ # klibc doesn't support prelinking, so we need to mask it cat > "${T}/70klibc" <<-EOF PRELINK_PATH_MASK="/usr/${libdir}/klibc" EOF doenvd "${T}"/70klibc # Fix the permissions (bug #178053) on /usr/${libdir}/klibc/include # Actually I have no idea, why the includes have those weird-ass permissions # on a particular system, might be due to inherited permissions from parent # directory # NOTE: This totally violates sandbox <asturm@gentoo.org> # find "${D}"/usr/${libdir}/klibc/include | xargs chmod o+rX find "${D}"/usr/${libdir}/klibc/include -type f \ \( -name '.install' -o -name '..install.cmd' \) -delete || die # Hardlinks becoming copies for x in gunzip zcat ; do rm -f "${D}/${klibc_prefix}/bin/${x}" dosym gzip "${klibc_prefix}/bin/${x}" done # Restore now, so we can use the tc- functions ARCH="${myARCH}" ABI="${myABI}" if ! tc-is-cross-compiler ; then cd "${S}" insinto /usr/share/aclocal doins contrib/klibc.m4 dodoc README usr/klibc/CAVEATS docinto gzip; dodoc usr/gzip/README fi # Fix up the symlink # Mainly for merged arches linkname="${D}/usr/${libdir}/klibc/include/asm" if [ -L "${linkname}" ] && [ ! -e "${linkname}" ] ; then ln -snf asm-${KLIBCASMARCH} "${linkname}" fi } src_test() { if ! tc-is-cross-compiler ; then cd "${S}"/usr/klibc/tests ALL_TESTS="$(ls *.c |sed 's,\.c$,,g')" BROKEN_TESTS="fcntl fnmatch testrand48" failed=0 for t in $ALL_TESTS ; do if has $t $BROKEN_TESTS ; then echo "=== $t SKIP" else echo -n "=== $t " ./$t </dev/null >/dev/null rc=$? if [ $rc -eq 0 ]; then echo PASS else echo FAIL failed=1 fi fi done [ $failed -ne 0 ] && die "Some tests failed." fi }