382 lines
11 KiB
Plaintext
382 lines
11 KiB
Plaintext
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# Copyright 1999-2015 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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# $Id$
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alt_prefix() {
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is_crosscompile && echo /usr/${CTARGET}
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}
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if [[ ${EAPI:-0} == [012] ]] ; then
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: ${ED:=${D}}
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: ${EROOT:=${ROOT}}
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fi
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# This indirection is for binpkgs. #523332
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_nonfatal() { nonfatal "$@" ; }
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if [[ ${EAPI:-0} == [0123] ]] ; then
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nonfatal() { "$@" ; }
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_nonfatal() { "$@" ; }
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fi
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# We need to be able to set alternative headers for
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# compiling for non-native platform
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# Will also become useful for testing kernel-headers without screwing up
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# the whole system.
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# note: intentionally undocumented.
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alt_headers() {
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echo ${ALT_HEADERS:=$(alt_prefix)/usr/include}
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}
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alt_build_headers() {
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if [[ -z ${ALT_BUILD_HEADERS} ]] ; then
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ALT_BUILD_HEADERS="${EPREFIX}$(alt_headers)"
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if tc-is-cross-compiler ; then
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ALT_BUILD_HEADERS=${SYSROOT}$(alt_headers)
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if [[ ! -e ${ALT_BUILD_HEADERS}/linux/version.h ]] ; then
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local header_path=$(echo '#include <linux/version.h>' | $(tc-getCPP ${CTARGET}) ${CFLAGS} 2>&1 | grep -o '[^"]*linux/version.h')
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ALT_BUILD_HEADERS=${header_path%/linux/version.h}
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fi
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fi
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fi
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echo "${ALT_BUILD_HEADERS}"
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}
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alt_libdir() {
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echo $(alt_prefix)/$(get_libdir)
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}
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alt_usrlibdir() {
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echo $(alt_prefix)/usr/$(get_libdir)
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}
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builddir() {
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echo "${WORKDIR}/build-${ABI}-${CTARGET}-$1"
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}
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setup_target_flags() {
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# This largely mucks with compiler flags. None of which should matter
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# when building up just the headers.
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just_headers && return 0
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case $(tc-arch) in
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x86)
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# -march needed for #185404 #199334
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# TODO: When creating the first glibc cross-compile, this test will
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# always fail as it does a full link which in turn requires glibc.
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# Probably also applies when changing multilib profile settings (e.g.
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# enabling x86 when the profile was amd64-only previously).
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# We could change main to _start and pass -nostdlib here so that we
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# only test the gcc code compilation. Or we could do a compile and
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# then look for the symbol via scanelf.
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if ! glibc_compile_test "" 'void f(int i, void *p) {if (__sync_fetch_and_add(&i, 1)) f(i, p);}\nint main(){return 0;}\n' 2>/dev/null ; then
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local t=${CTARGET_OPT:-${CTARGET}}
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t=${t%%-*}
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filter-flags '-march=*'
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export CFLAGS="-march=${t} ${CFLAGS}"
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einfo "Auto adding -march=${t} to CFLAGS #185404"
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fi
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;;
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amd64)
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# -march needed for #185404 #199334
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# Note: This test only matters when the x86 ABI is enabled, so we could
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# optimize a bit and elide it.
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# TODO: See cross-compile issues listed above for x86.
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if ! glibc_compile_test "${CFLAGS_x86}" 'void f(int i, void *p) {if (__sync_fetch_and_add(&i, 1)) f(i, p);}\nint main(){return 0;}\n' 2>/dev/null ; then
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local t=${CTARGET_OPT:-${CTARGET}}
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t=${t%%-*}
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# Normally the target is x86_64-xxx, so turn that into the -march that
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# gcc actually accepts. #528708
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[[ ${t} == "x86_64" ]] && t="x86-64"
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filter-flags '-march=*'
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# ugly, ugly, ugly. ugly.
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CFLAGS_x86=$(CFLAGS=${CFLAGS_x86} filter-flags '-march=*'; echo "${CFLAGS}")
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export CFLAGS_x86="${CFLAGS_x86} -march=${t}"
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einfo "Auto adding -march=${t} to CFLAGS_x86 #185404"
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fi
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;;
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mips)
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# The mips abi cannot support the GNU style hashes. #233233
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filter-ldflags -Wl,--hash-style=gnu -Wl,--hash-style=both
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;;
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ppc)
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append-flags "-freorder-blocks"
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;;
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sparc)
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# Both sparc and sparc64 can use -fcall-used-g6. -g7 is bad, though.
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filter-flags "-fcall-used-g7"
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append-flags "-fcall-used-g6"
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# If the CHOST is the basic one (e.g. not sparcv9-xxx already),
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# try to pick a better one so glibc can use cpu-specific .S files.
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# We key off the CFLAGS to get a good value. Also need to handle
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# version skew.
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# We can't force users to set their CHOST to their exact machine
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# as many of these are not recognized by config.sub/gcc and such :(.
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# Note: If the mcpu values don't scale, we might try probing CPP defines.
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# Note: Should we factor in -Wa,-AvXXX flags too ? Or -mvis/etc... ?
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local cpu
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case ${CTARGET} in
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sparc64-*)
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case $(get-flag mcpu) in
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niagara[234])
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if version_is_at_least 2.8 ; then
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cpu="sparc64v2"
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elif version_is_at_least 2.4 ; then
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cpu="sparc64v"
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elif version_is_at_least 2.2.3 ; then
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cpu="sparc64b"
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fi
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;;
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niagara)
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if version_is_at_least 2.4 ; then
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cpu="sparc64v"
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elif version_is_at_least 2.2.3 ; then
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cpu="sparc64b"
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fi
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;;
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ultrasparc3)
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cpu="sparc64b"
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;;
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*)
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# We need to force at least v9a because the base build doesn't
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# work with just v9.
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# https://sourceware.org/bugzilla/show_bug.cgi?id=19477
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[[ -z ${cpu} ]] && append-flags "-Wa,-xarch=v9a"
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;;
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esac
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;;
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sparc-*)
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case $(get-flag mcpu) in
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niagara[234])
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if version_is_at_least 2.8 ; then
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cpu="sparcv9v2"
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elif version_is_at_least 2.4 ; then
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cpu="sparcv9v"
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elif version_is_at_least 2.2.3 ; then
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cpu="sparcv9b"
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else
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cpu="sparcv9"
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fi
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;;
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niagara)
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if version_is_at_least 2.4 ; then
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cpu="sparcv9v"
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elif version_is_at_least 2.2.3 ; then
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cpu="sparcv9b"
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else
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cpu="sparcv9"
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fi
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;;
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ultrasparc3)
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cpu="sparcv9b"
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;;
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v9|ultrasparc)
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cpu="sparcv9"
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;;
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v8|supersparc|hypersparc|leon|leon3)
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cpu="sparcv8"
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;;
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esac
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;;
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esac
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[[ -n ${cpu} ]] && CTARGET_OPT="${cpu}-${CTARGET#*-}"
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;;
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esac
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}
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setup_flags() {
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# Make sure host make.conf doesn't pollute us
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if is_crosscompile || tc-is-cross-compiler ; then
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CHOST=${CTARGET} strip-unsupported-flags
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fi
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# Store our CFLAGS because it's changed depending on which CTARGET
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# we are building when pulling glibc on a multilib profile
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CFLAGS_BASE=${CFLAGS_BASE-${CFLAGS}}
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CFLAGS=${CFLAGS_BASE}
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CXXFLAGS_BASE=${CXXFLAGS_BASE-${CXXFLAGS}}
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CXXFLAGS=${CXXFLAGS_BASE}
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ASFLAGS_BASE=${ASFLAGS_BASE-${ASFLAGS}}
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ASFLAGS=${ASFLAGS_BASE}
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# Over-zealous CFLAGS can often cause problems. What may work for one
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# person may not work for another. To avoid a large influx of bugs
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# relating to failed builds, we strip most CFLAGS out to ensure as few
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# problems as possible.
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strip-flags
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strip-unsupported-flags
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filter-flags -m32 -m64 -mabi=*
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# Bug 492892.
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filter-flags -frecord-gcc-switches
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unset CBUILD_OPT CTARGET_OPT
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if use multilib ; then
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CTARGET_OPT=$(get_abi_CTARGET)
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[[ -z ${CTARGET_OPT} ]] && CTARGET_OPT=$(get_abi_CHOST)
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fi
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setup_target_flags
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if [[ -n ${CTARGET_OPT} && ${CBUILD} == ${CHOST} ]] && ! is_crosscompile; then
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CBUILD_OPT=${CTARGET_OPT}
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fi
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# Lock glibc at -O2 -- linuxthreads needs it and we want to be
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# conservative here. -fno-strict-aliasing is to work around #155906
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filter-flags -O?
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append-flags -O2 -fno-strict-aliasing -fno-builtin-strlen
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# Can't build glibc itself with fortify code. Newer versions add
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# this flag for us, so no need to do it manually.
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version_is_at_least 2.16 ${PV} || append-cppflags -U_FORTIFY_SOURCE
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# building glibc with SSP is fraught with difficulty, especially
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# due to __stack_chk_fail_local which would mean significant changes
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# to the glibc build process. See bug #94325 #293721
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# Note we have to handle both user-given CFLAGS and gcc defaults via
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# spec rules here. We can't simply add -fno-stack-protector as it gets
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# added before user flags, and we can't just filter-flags because
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# _filter_hardened doesn't support globs.
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filter-flags -fstack-protector*
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gcc-specs-ssp && append-flags $(test-flags -fno-stack-protector)
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if use hardened && gcc-specs-pie ; then
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# Force PIC macro definition for all compilations since they're all
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# either -fPIC or -fPIE with the default-PIE compiler.
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append-cppflags -DPIC
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else
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# Don't build -fPIE without the default-PIE compiler and the
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# hardened-pie patch
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filter-flags -fPIE
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fi
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}
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want_nptl() {
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[[ -z ${LT_VER} ]] && return 0
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want_tls || return 1
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use nptl || return 1
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# Older versions of glibc had incomplete arch support for nptl.
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# But if you're building those now, you can handle USE=nptl yourself.
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return 0
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}
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want_linuxthreads() {
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[[ -z ${LT_VER} ]] && return 1
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use linuxthreads
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}
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want_tls() {
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# Archs that can use TLS (Thread Local Storage)
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case $(tc-arch) in
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x86)
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# requires i486 or better #106556
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[[ ${CTARGET} == i[4567]86* ]] && return 0
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return 1
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;;
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esac
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return 0
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}
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want__thread() {
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want_tls || return 1
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# For some reason --with-tls --with__thread is causing segfaults on sparc32.
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[[ ${PROFILE_ARCH} == "sparc" ]] && return 1
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[[ -n ${WANT__THREAD} ]] && return ${WANT__THREAD}
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# only test gcc -- cant test linking yet
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tc-has-tls -c ${CTARGET}
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WANT__THREAD=$?
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return ${WANT__THREAD}
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}
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use_multiarch() {
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# Make sure binutils is new enough to support indirect functions #336792
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# This funky sed supports gold and bfd linkers.
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local bver nver
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bver=$($(tc-getLD ${CTARGET}) -v | sed -n -r '1{s:[^0-9]*::;s:^([0-9.]*).*:\1:;p}')
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case $(tc-arch ${CTARGET}) in
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amd64|x86) nver="2.20" ;;
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arm) nver="2.22" ;;
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hppa) nver="2.23" ;;
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ppc|ppc64) nver="2.20" ;;
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# ifunc was added in 2.23, but glibc also needs machinemode which is in 2.24.
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s390) nver="2.24" ;;
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sparc) nver="2.21" ;;
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*) return 1 ;;
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esac
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version_is_at_least ${nver} ${bver}
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}
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# Setup toolchain variables that had historically
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# been defined in the profiles for these archs.
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setup_env() {
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# silly users
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unset LD_RUN_PATH
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unset LD_ASSUME_KERNEL
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if is_crosscompile || tc-is-cross-compiler ; then
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multilib_env ${CTARGET_OPT:-${CTARGET}}
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if ! use multilib ; then
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MULTILIB_ABIS=${DEFAULT_ABI}
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else
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MULTILIB_ABIS=${MULTILIB_ABIS:-${DEFAULT_ABI}}
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fi
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# If the user has CFLAGS_<CTARGET> in their make.conf, use that,
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# and fall back on CFLAGS.
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local VAR=CFLAGS_${CTARGET//[-.]/_}
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CFLAGS=${!VAR-${CFLAGS}}
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fi
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setup_flags
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export ABI=${ABI:-${DEFAULT_ABI:-default}}
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local VAR=CFLAGS_${ABI}
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# We need to export CFLAGS with abi information in them because glibc's
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# configure script checks CFLAGS for some targets (like mips). Keep
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# around the original clean value to avoid appending multiple ABIs on
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# top of each other.
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: ${__GLIBC_CC:=$(tc-getCC ${CTARGET_OPT:-${CTARGET}})}
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export __GLIBC_CC CC="${__GLIBC_CC} ${!VAR}"
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}
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foreach_abi() {
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setup_env
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local ret=0
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local abilist=""
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if use multilib ; then
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abilist=$(get_install_abis)
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else
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abilist=${DEFAULT_ABI}
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fi
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evar_push ABI
|
||
|
|
export ABI
|
||
|
|
for ABI in ${abilist:-default} ; do
|
||
|
|
setup_env
|
||
|
|
einfo "Running $1 for ABI ${ABI}"
|
||
|
|
$1
|
||
|
|
: $(( ret |= $? ))
|
||
|
|
done
|
||
|
|
evar_pop
|
||
|
|
return ${ret}
|
||
|
|
}
|
||
|
|
|
||
|
|
just_headers() {
|
||
|
|
is_crosscompile && use crosscompile_opts_headers-only
|
||
|
|
}
|
||
|
|
|
||
|
|
glibc_banner() {
|
||
|
|
local b="Gentoo ${PVR}"
|
||
|
|
[[ -n ${SNAP_VER} ]] && b+=" snapshot ${SNAP_VER}"
|
||
|
|
[[ -n ${BRANCH_UPDATE} ]] && b+=" branch ${BRANCH_UPDATE}"
|
||
|
|
[[ -n ${PATCH_VER} ]] && ! use vanilla && b+=" p${PATCH_VER}"
|
||
|
|
echo "${b}"
|
||
|
|
}
|