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f2b64524b0
crosstool-ng/scripts/build/cc/gcc.sh
Alexey Neyman f2b64524b0 Add a symlink to LTO for binutils 
... so that ar can find the plugin even when invoked directly, not
via the gcc-ar plugin.

Signed-off-by: Alexey Neyman <stilor@att.net>
2018-12-11 08:55:07 -08:00

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# This file adds the function to build the gcc C compiler
# Copyright 2007 Yann E. MORIN
# Licensed under the GPL v2. See COPYING in the root of this package
# Download gcc
do_cc_get() {
local linaro_version=""
local linaro_series=""
CT_Fetch GCC
# Starting with GCC 4.3, ecj is used for Java, and will only be
# built if the configure script finds ecj.jar at the top of the
# GCC source tree, which will not be there unless we get it and
# put it there ourselves
if [ "${CT_CC_LANG_JAVA_USE_ECJ}" = "y" ]; then
if ! CT_GetFile package=ecj basename=ecj-latest extensions=.jar \
mirrors=$(CT_Mirrors sourceware java); then
# Should be a package, too - but with Java retirement in GCC,
# it may not make sense.
CT_Abort "Failed to download ecj-latest.jar"
fi
fi
}
# Extract gcc
do_cc_extract() {
CT_ExtractPatch GCC
# Copy ecj-latest.jar to ecj.jar at the top of the GCC source tree
if [ "${CT_CC_LANG_JAVA_USE_ECJ}" = "y" -a ! -f "${CT_SRC_DIR}/gcc/ecj.jar" ]; then
CT_DoExecLog ALL cp -v "${CT_TARBALLS_DIR}/ecj-latest.jar" "${CT_SRC_DIR}/gcc/ecj.jar"
fi
}
#------------------------------------------------------------------------------
# This function builds up the set of languages to enable
# No argument expected, returns the comma-separated language list on stdout
cc_gcc_lang_list() {
local lang_list
lang_list="c"
[ "${CT_CC_LANG_CXX}" = "y" ] && lang_list+=",c++"
[ "${CT_CC_LANG_FORTRAN}" = "y" ] && lang_list+=",fortran"
[ "${CT_CC_LANG_ADA}" = "y" ] && lang_list+=",ada"
[ "${CT_CC_LANG_JAVA}" = "y" ] && lang_list+=",java"
[ "${CT_CC_LANG_OBJC}" = "y" ] && lang_list+=",objc"
[ "${CT_CC_LANG_OBJCXX}" = "y" ] && lang_list+=",obj-c++"
[ "${CT_CC_LANG_GOLANG}" = "y" ] && lang_list+=",go"
lang_list+="${CT_CC_LANG_OTHERS:+,${CT_CC_LANG_OTHERS}}"
printf "%s" "${lang_list}"
}
#------------------------------------------------------------------------------
# Report the type of a GCC option
cc_gcc_classify_opt() {
# Options present in multiple architectures
case "${1}" in
-march=*) echo "arch"; return;;
-mabi=*) echo "abi"; return;;
-mcpu=*|-mmcu=*) echo "cpu"; return;;
-mtune=*) echo "tune"; return;;
-mfpu=*) echo "fpu"; return;;
-mhard-float|-msoft-float|-mno-soft-float|-mno-float|-mfloat-abi=*|\
-mfpu|-mno-fpu) echo "float"; return;;
-EB|-EL|-mbig-endian|-mlittle-endian|-mbig|-mlittle|-meb|-mel|-mb|-ml) echo "endian"; return;;
-mthumb|-marm) echo "mode"; return;;
esac
# Arch-specific options and aliases
case "${CT_ARCH}" in
m68k)
case "${1}" in
-m68881) echo "float"; return;;
-m5[234]*|-mcfv4e) echo "cpu"; return;;
-m68*|-mc68*) echo "arch"; return;;
esac
;;
mips)
case "${1}" in
-mips[1234]|-mips32|-mips32r*|-mips64|-mips64r*) echo "cpu"; return;;
esac
;;
sh)
case "${1}" in
-m[12345]*) echo "cpu"; return;;
esac
esac
# All tried and failed
echo "unknown"
}
evaluate_multilib_cflags()
{
local multi_dir multi_os_dir multi_os_dir_gcc multi_root multi_flags multi_index multi_count
local mdir mdir_os dirtop
local f
for arg in "$@"; do
eval "${arg// /\\ }"
done
mdir="lib/${multi_dir}"
mdir_os="lib/${multi_os_dir_gcc}"
CT_SanitizeVarDir mdir mdir_os
CT_DoLog EXTRA " '${multi_flags}' --> ${mdir} (gcc) ${mdir_os} (os)"
for f in ${multi_flags}; do
eval ml_`cc_gcc_classify_opt ${f}`=seen
done
if [ "${CT_DEMULTILIB}" = "y" -a "${CT_USE_SYSROOT}" = "y" ]; then
case "${mdir_os}" in
lib/*)
;;
*)
dirtop="${mdir_os%%/*}"
if [ ! -e "${multi_root}/${mdir_os}" ]; then
CT_DoExecLog ALL ln -sfv lib "${multi_root}/${mdir_os}"
fi
if [ ! -e "${multi_root}/usr/${mdir_os}" ]; then
CT_DoExecLog ALL ln -sfv lib "${multi_root}/usr/${mdir_os}"
fi
;;
esac
fi
}
#------------------------------------------------------------------------------
# This function lists the multilibs configured in the compiler (even if multilib
# is disabled - so that it lists the default GCC/OS directory, which may differ
# from the default 'lib'). It then performs a few multilib checks/quirks:
#
# 1. On MIPS target, gcc (or rather, ld, which it invokes under the hood) chokes
# if supplied with two -mabi=* options. I.e., 'gcc -mabi=n32' and 'gcc -mabi=32' both
# work, but 'gcc -mabi=32 -mabi=n32' produces an internal error in ld. Thus we do
# not supply target's CFLAGS in multilib builds - and after compiling pass-1 gcc,
# attempt to determine which CFLAGS need to be filtered out.
#
# 2. If "demultilibing" is in effect, create top-level directories for any
# multilibs not in lib/ as symlinks to lib.
cc_gcc_multilib_housekeeping() {
local cc host
local ml_arch ml_abi ml_cpu ml_tune ml_fpu ml_float ml_endian ml_mode ml_unknown ml
local new_cflags
for arg in "$@"; do
eval "${arg// /\\ }"
done
if [ \( "${CT_CANADIAN}" = "y" -o "${CT_CROSS_NATIVE}" = "y" \) -a "${host}" = "${CT_HOST}" ]; then
CT_DoLog EXTRA "Canadian Cross/Cross-native unable to confirm multilibs configuration "\
"directly; will use build-compiler for housekeeping."
# Since we cannot run the desired compiler, substitute build-CC with the assumption
# that the host-CC is configured in the same way.
cc="${CT_BUILDTOOLS_PREFIX_DIR}/bin/${CT_TARGET}-${CT_CC}"
fi
CT_IterateMultilibs evaluate_multilib_cflags evaluate_cflags
if [ -n "${CT_MULTILIB}" ]; then
# Filtering out some of the options provided in CT-NG config. Then *prepend*
# them to CT_TARGET_CFLAGS, like scripts/crosstool-NG.sh does. Zero out
# the stashed MULTILIB flags so that we don't process them again in the passes
# that follow.
CT_DoLog DEBUG "Configured target CFLAGS: '${CT_ARCH_TARGET_CFLAGS_MULTILIB}'"
ml_unknown= # Pass through anything we don't know about
for f in ${CT_ARCH_TARGET_CFLAGS_MULTILIB}; do
eval ml=\$ml_`cc_gcc_classify_opt ${f}`
if [ "${ml}" != "seen" ]; then
new_cflags="${new_cflags} ${f}"
fi
done
CT_DoLog DEBUG "Filtered target CFLAGS: '${new_cflags}'"
CT_EnvModify CT_ALL_TARGET_CFLAGS "${new_cflags} ${CT_TARGET_CFLAGS}"
CT_EnvModify CT_ARCH_TARGET_CFLAGS_MULTILIB ""
# Currently, the only LDFLAGS are endianness-related
CT_DoLog DEBUG "Configured target LDFLAGS: '${CT_ARCH_TARGET_LDFLAGS_MULTILIB}'"
if [ "${ml_endian}" != "seen" ]; then
CT_EnvModify CT_ALL_TARGET_LDFLAGS "${CT_ARCH_TARGET_LDFLAGS_MULTILIB} ${CT_TARGET_LDFLAGS}"
CT_EnvModify CT_ARCH_TARGET_LDFLAGS_MULTILIB ""
fi
CT_DoLog DEBUG "Filtered target LDFLAGS: '${CT_ARCH_TARGET_LDFLAGS_MULTILIB}'"
fi
}
#------------------------------------------------------------------------------
# Core gcc pass 1
do_cc_core_pass_1() {
local -a core_opts
if [ "${CT_CC_CORE_PASS_1_NEEDED}" != "y" ]; then
return 0
fi
core_opts+=( "mode=static" )
core_opts+=( "host=${CT_BUILD}" )
core_opts+=( "complibs=${CT_BUILDTOOLS_PREFIX_DIR}" )
core_opts+=( "prefix=${CT_BUILDTOOLS_PREFIX_DIR}" )
core_opts+=( "cflags=${CT_CFLAGS_FOR_BUILD}" )
core_opts+=( "ldflags=${CT_LDFLAGS_FOR_BUILD}" )
core_opts+=( "lang_list=c" )
core_opts+=( "build_step=core1" )
CT_DoStep INFO "Installing pass-1 core C gcc compiler"
CT_mkdir_pushd "${CT_BUILD_DIR}/build-cc-gcc-core-pass-1"
do_gcc_core_backend "${core_opts[@]}"
CT_Popd
CT_EndStep
}
# Core gcc pass 2
do_cc_core_pass_2() {
local -a core_opts
if [ "${CT_CC_CORE_PASS_2_NEEDED}" != "y" ]; then
return 0
fi
# Common options:
core_opts+=( "host=${CT_BUILD}" )
core_opts+=( "prefix=${CT_BUILDTOOLS_PREFIX_DIR}" )
core_opts+=( "complibs=${CT_BUILDTOOLS_PREFIX_DIR}" )
core_opts+=( "cflags=${CT_CFLAGS_FOR_BUILD}" )
core_opts+=( "ldflags=${CT_LDFLAGS_FOR_BUILD}" )
core_opts+=( "lang_list=c" )
core_opts+=( "build_step=core2" )
# Different conditions are at stake here:
# - In case the threading model is NPTL, we need a shared-capable core
# gcc; in all other cases, we need a static-only core gcc.
# - In case the threading model is NPTL or win32, or gcc is 4.3 or
# later, we need to build libgcc
case "${CT_THREADS}" in
nptl)
if [ "${CT_SHARED_LIBS}" = "y" ]; then
core_opts+=( "mode=shared" )
else
core_opts+=( "mode=static" )
fi
core_opts+=( "build_libgcc=yes" )
;;
win32)
core_opts+=( "mode=static" )
core_opts+=( "build_libgcc=yes" )
;;
*)
core_opts+=( "mode=static" )
core_opts+=( "build_libgcc=yes" )
;;
esac
CT_DoStep INFO "Installing pass-2 core C gcc compiler"
CT_mkdir_pushd "${CT_BUILD_DIR}/build-cc-gcc-core-pass-2"
do_gcc_core_backend "${core_opts[@]}"
CT_Popd
CT_EndStep
}
#------------------------------------------------------------------------------
# Build core gcc
# This function is used to build the core C compiler.
# Usage: do_gcc_core_backend param=value [...]
# Parameter : Definition : Type : Default
# mode : build a 'static', 'shared' or 'baremetal' : string : (none)
# host : the machine the core will run on : tuple : (none)
# prefix : dir prefix to install into : dir : (none)
# complibs : dir where complibs are installed : dir : (none)
# lang_list : the list of languages to build : string : (empty)
# build_libgcc : build libgcc or not : bool : no
# build_libstdcxx : build libstdc++ or not : bool : no
# build_libgfortran : build libgfortran or not : bool : no
# build_staticlinked : build statically linked or not : bool : no
# build_manuals : whether to build manuals or not : bool : no
# cflags : cflags to use : string : (empty)
# ldflags : ldflags to use : string : (empty)
# build_step : build step 'core1', 'core2', 'gcc_build'
# or 'gcc_host' : string : (none)
# Usage: do_gcc_core_backend mode=[static|shared|baremetal] build_libgcc=[yes|no] build_staticlinked=[yes|no]
do_gcc_core_backend() {
local mode
local build_libgcc=no
local build_libstdcxx=no
local build_libgfortran=no
local build_staticlinked=no
local build_manuals=no
local host
local prefix
local complibs
local lang_list
local cflags
local cflags_for_build
local ldflags
local build_step
local log_txt
local tmp
local -a host_libstdcxx_flags
local -a extra_config
local -a core_LDFLAGS
local -a core_targets
local -a core_targets_all
local -a core_targets_install
local -a extra_user_config
local arg
for arg in "$@"; do
eval "${arg// /\\ }"
done
# This function gets called in case of a bare metal compiler for the final gcc, too.
case "${build_step}" in
core1|core2)
CT_DoLog EXTRA "Configuring core C gcc compiler"
log_txt="gcc"
extra_config+=( "${CT_CC_CORE_SYSROOT_ARG[@]}" )
extra_user_config=( "${CT_CC_GCC_CORE_EXTRA_CONFIG_ARRAY[@]}" )
;;
gcc_build|gcc_host)
CT_DoLog EXTRA "Configuring final gcc compiler"
extra_config+=( "${CT_CC_SYSROOT_ARG[@]}" )
extra_user_config=( "${CT_CC_GCC_EXTRA_CONFIG_ARRAY[@]}" )
log_txt="final gcc compiler"
# to inhibit the libiberty and libgcc tricks later on
build_libgcc=no
;;
*)
CT_Abort "Internal Error: 'build_step' must be one of: 'core1', 'core2', 'gcc_build' or 'gcc_host', not '${build_step:-(empty)}'"
;;
esac
case "${mode}" in
static)
extra_config+=("--with-newlib")
extra_config+=("--enable-threads=no")
extra_config+=("--disable-shared")
;;
shared)
extra_config+=("--enable-shared")
;;
baremetal)
extra_config+=("--with-newlib")
extra_config+=("--enable-threads=no")
extra_config+=("--disable-shared")
;;
*)
CT_Abort "Internal Error: 'mode' must be one of: 'static', 'shared' or 'baremetal', not '${mode:-(empty)}'"
;;
esac
case "${build_step}" in
core2|gcc_build)
CT_DoLog DEBUG "Copying headers to install area of core C compiler"
CT_DoExecLog ALL cp -a "${CT_HEADERS_DIR}" "${prefix}/${CT_TARGET}/include"
esac
for tmp in ARCH ABI CPU TUNE FPU FLOAT ENDIAN; do
eval tmp="\${CT_ARCH_WITH_${tmp}}"
if [ -n "${tmp}" ]; then
extra_config+=("${tmp}")
fi
done
[ -n "${CT_PKGVERSION}" ] && extra_config+=("--with-pkgversion=${CT_PKGVERSION}")
[ -n "${CT_TOOLCHAIN_BUGURL}" ] && extra_config+=("--with-bugurl=${CT_TOOLCHAIN_BUGURL}")
if [ "${CT_CC_CXA_ATEXIT}" = "y" ]; then
extra_config+=("--enable-__cxa_atexit")
else
extra_config+=("--disable-__cxa_atexit")
fi
if [ -n "${CT_CC_GCC_ENABLE_CXX_FLAGS}" \
-a "${mode}" = "baremetal" ]; then
extra_config+=("--enable-cxx-flags=${CT_CC_GCC_ENABLE_CXX_FLAGS}")
fi
extra_config+=(--disable-libgomp)
extra_config+=(--disable-libmudflap)
extra_config+=(--disable-libmpx)
if [ "${CT_CC_GCC_LIBSSP}" = "y" ]; then
extra_config+=(--enable-libssp)
else
extra_config+=(--disable-libssp)
fi
if [ "${CT_CC_GCC_LIBQUADMATH}" = "y" ]; then
extra_config+=(--enable-libquadmath)
extra_config+=(--enable-libquadmath-support)
else
extra_config+=(--disable-libquadmath)
extra_config+=(--disable-libquadmath-support)
fi
core_LDFLAGS+=("${ldflags}")
# *** WARNING ! ***
# Keep this full if-else-if-elif-fi-fi block in sync
# with the same block in do_gcc_backend, below.
if [ "${build_staticlinked}" = "yes" ]; then
core_LDFLAGS+=("-static")
host_libstdcxx_flags+=("-static-libgcc")
host_libstdcxx_flags+=("-Wl,-Bstatic,-lstdc++")
host_libstdcxx_flags+=("-lm")
# Companion libraries are build static (eg !shared), so
# the libstdc++ is not pulled automatically, although it
# is needed. Shoe-horn it in our LDFLAGS
# Ditto libm on some Fedora boxen
core_LDFLAGS+=("-lstdc++")
core_LDFLAGS+=("-lm")
else
if [ "${CT_CC_GCC_STATIC_LIBSTDCXX}" = "y" ]; then
# this is from CodeSourcery arm-2010q1-202-arm-none-linux-gnueabi.src.tar.bz2
# build script
# INFO: if the host gcc is gcc-4.5 then presumably we could use -static-libstdc++,
# see http://gcc.gnu.org/ml/gcc-patches/2009-06/msg01635.html
host_libstdcxx_flags+=("-static-libgcc")
host_libstdcxx_flags+=("-Wl,-Bstatic,-lstdc++,-Bdynamic")
host_libstdcxx_flags+=("-lm")
fi
# When companion libraries are build static (eg !shared),
# the libstdc++ is not pulled automatically, although it
# is needed. Shoe-horn it in our LDFLAGS
# Ditto libm on some Fedora boxen
core_LDFLAGS+=("-lstdc++")
core_LDFLAGS+=("-lm")
fi
extra_config+=("--with-gmp=${complibs}")
extra_config+=("--with-mpfr=${complibs}")
extra_config+=("--with-mpc=${complibs}")
if [ "${CT_CC_GCC_USE_GRAPHITE}" = "y" ]; then
if [ "${CT_ISL}" = "y" ]; then
extra_config+=("--with-isl=${complibs}")
fi
if [ "${CT_CLOOG}" = "y" ]; then
extra_config+=("--with-cloog=${complibs}")
fi
else
extra_config+=("--with-isl=no")
extra_config+=("--with-cloog=no")
fi
if [ "${CT_CC_GCC_USE_LTO}" = "y" ]; then
extra_config+=("--enable-lto")
else
extra_config+=("--disable-lto")
fi
if [ ${#host_libstdcxx_flags[@]} -ne 0 ]; then
extra_config+=("--with-host-libstdcxx=${host_libstdcxx_flags[*]}")
fi
if [ "${CT_CC_GCC_ENABLE_TARGET_OPTSPACE}" = "y" ]; then
extra_config+=("--enable-target-optspace")
fi
if [ "${CT_CC_GCC_DISABLE_PCH}" = "y" ]; then
extra_config+=("--disable-libstdcxx-pch")
fi
if [ "${CT_LIBC_GLIBC}" = "y" ]; then
# Report GLIBC's version to GCC, it affects the defaults on other options.
# Pass-2 should be able to get it from the headers, but for some options
# (such as --with-long-double-128) we need to get it right even in pass-1.
# GCC expects just two numbers separated by a dot.
local glibc_version
CT_GetPkgVersion GLIBC glibc_version
case "${glibc_version}" in
new) glibc_version=99.99;;
old) glibc_version=1.0;;
*) glibc_version=`echo "${glibc_version}" | sed 's/\([1-9][0-9]*\.[1-9][0-9]*\).*/\1/'`;;
esac
extra_config+=("--with-glibc-version=${glibc_version}")
fi
case "${CT_CC_GCC_LDBL_128}" in
y) extra_config+=("--with-long-double-128");;
m) ;;
"") extra_config+=("--without-long-double-128");;
esac
if [ "${CT_CC_GCC_BUILD_ID}" = "y" ]; then
extra_config+=( --enable-linker-build-id )
fi
case "${CT_CC_GCC_LNK_HASH_STYLE}" in
"") ;;
*) extra_config+=( "--with-linker-hash-style=${CT_CC_GCC_LNK_HASH_STYLE}" );;
esac
case "${CT_CC_GCC_DEC_FLOATS}" in
"") ;;
*) extra_config+=( "--enable-decimal-float=${CT_CC_GCC_DEC_FLOATS}" );;
esac
case "${CT_ARCH}" in
mips)
case "${CT_CC_GCC_mips_llsc}" in
y) extra_config+=( --with-llsc );;
m) ;;
*) extra_config+=( --without-llsc );;
esac
case "${CT_CC_GCC_mips_synci}" in
y) extra_config+=( --with-synci );;
m) ;;
*) extra_config+=( --without-synci );;
esac
if [ "${CT_CC_GCC_mips_plt}" ]; then
extra_config+=( --with-mips-plt )
fi
;; # ARCH is mips
esac
if [ "${CT_TOOLCHAIN_ENABLE_NLS}" = "y" ]; then
extra_config+=("--with-libintl-prefix=${complibs}")
else
extra_config+=("--disable-nls")
fi
if [ "${CT_CC_GCC_SYSTEM_ZLIB}" = "y" ]; then
extra_config+=("--with-system-zlib")
fi
case "${CT_CC_GCC_CONFIG_TLS}" in
y) extra_config+=("--enable-tls");;
m) ;;
"") extra_config+=("--disable-tls");;
esac
# Some versions of gcc have a defective --enable-multilib.
# Since that's the default, only pass --disable-multilib. For multilib,
# also enable multiarch. Without explicit --enable-multiarch, pass-1
# compiler is configured as multilib/no-multiarch and pass-2/final
# are multilib/multiarch (because gcc autodetects multiarch based on
# multiple instances of crt*.o in the install directory - which do
# not exist in pass-1).
if [ "${CT_MULTILIB}" != "y" ]; then
extra_config+=("--disable-multilib")
else
extra_config+=("--enable-multiarch")
if [ -n "${CT_CC_GCC_MULTILIB_LIST}" ]; then
extra_config+=("--with-multilib-list=${CT_CC_GCC_MULTILIB_LIST}")
fi
fi
CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
# We may need to modify host/build CFLAGS separately below
cflags_for_build="${CT_CFLAGS_FOR_BUILD}"
# Clang's default bracket-depth is 256, and building GCC
# requires somewhere between 257 and 512.
if [ "${host}" = "${CT_BUILD}" ]; then
if ${CT_BUILD}-gcc --version 2>&1 | grep clang; then
cflags="$cflags "-fbracket-depth=512
cflags_for_build="$cflags_for_build "-fbracket-depth=512
fi
else
# FIXME we currently don't support clang as host compiler, only as build
if ${CT_BUILD}-gcc --version 2>&1 | grep clang; then
cflags_for_build="$cflags_for_build "-fbracket-depth=512
fi
fi
# Use --with-local-prefix so older gccs don't look in /usr/local (http://gcc.gnu.org/PR10532).
# Pass only user-specified CFLAGS/LDFLAGS in CFLAGS_FOR_TARGET/LDFLAGS_FOR_TARGET: during
# the build of, for example, libatomic, GCC tried to compile multiple variants for runtime
# selection and passing architecture/CPU selectors, as detemined by crosstool-NG, may
# miscompile or outright fail.
CT_DoExecLog CFG \
CC_FOR_BUILD="${CT_BUILD}-gcc" \
CFLAGS="${cflags}" \
CFLAGS_FOR_BUILD="${cflags_for_build}" \
CXXFLAGS="${cflags}" \
CXXFLAGS_FOR_BUILD="${cflags_for_build}" \
LDFLAGS="${core_LDFLAGS[*]}" \
CFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}" \
CXXFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}" \
LDFLAGS_FOR_TARGET="${CT_TARGET_LDFLAGS}" \
${CONFIG_SHELL} \
"${CT_SRC_DIR}/gcc/configure" \
--build=${CT_BUILD} \
--host=${host} \
--target=${CT_TARGET} \
--prefix="${prefix}" \
--with-local-prefix="${CT_SYSROOT_DIR}" \
"${extra_config[@]}" \
--enable-languages="${lang_list}" \
"${extra_user_config[@]}"
if [ "${build_libgcc}" = "yes" ]; then
# HACK: we need to override SHLIB_LC from gcc/config/t-slibgcc-elf-ver or
# gcc/config/t-libunwind so -lc is removed from the link for
# libgcc_s.so, as we do not have a target -lc yet.
# This is not as ugly as it appears to be ;-) All symbols get resolved
# during the glibc build, and we provide a proper libgcc_s.so for the
# cross toolchain during the final gcc build.
#
# As we cannot modify the source tree, nor override SHLIB_LC itself
# during configure or make, we have to edit the resultant
# gcc/libgcc.mk itself to remove -lc from the link.
# This causes us to have to jump through some hoops...
#
# To produce libgcc.mk to edit we firstly require libiberty.a,
# so we configure then build it.
# Next we have to configure gcc, create libgcc.mk then edit it...
# So much easier if we just edit the source tree, but hey...
if [ ! -f "${CT_SRC_DIR}/gcc/gcc/BASE-VER" ]; then
CT_DoExecLog CFG make ${JOBSFLAGS} configure-libiberty
CT_DoExecLog ALL make ${JOBSFLAGS} -C libiberty libiberty.a
CT_DoExecLog CFG make ${JOBSFLAGS} configure-gcc configure-libcpp
CT_DoExecLog ALL make ${JOBSFLAGS} all-libcpp
else
CT_DoExecLog CFG make ${JOBSFLAGS} configure-gcc configure-libcpp configure-build-libiberty
CT_DoExecLog ALL make ${JOBSFLAGS} all-libcpp all-build-libiberty
fi
# HACK: gcc-4.2 uses libdecnumber to build libgcc.mk, so build it here.
if [ -d "${CT_SRC_DIR}/gcc/libdecnumber" ]; then
CT_DoExecLog CFG make ${JOBSFLAGS} configure-libdecnumber
CT_DoExecLog ALL make ${JOBSFLAGS} -C libdecnumber libdecnumber.a
fi
# HACK: gcc-4.8 uses libbacktrace to make libgcc.mvars, so make it here.
if [ -d "${CT_SRC_DIR}/gcc/libbacktrace" ]; then
CT_DoExecLog CFG make ${JOBSFLAGS} configure-libbacktrace
CT_DoExecLog ALL make ${JOBSFLAGS} -C libbacktrace
fi
libgcc_rule="libgcc.mvars"
core_targets=( gcc target-libgcc )
# On bare metal and canadian build the host-compiler is used when
# actually the build-system compiler is required. Choose the correct
# compilers for canadian build and use the defaults on other
# configurations.
if [ "${CT_BARE_METAL},${CT_CANADIAN}" = "y,y" ]; then
repair_cc="CC_FOR_BUILD=${CT_BUILD}-gcc \
CXX_FOR_BUILD=${CT_BUILD}-g++ \
GCC_FOR_TARGET=${CT_TARGET}-${CT_CC}"
else
repair_cc=""
fi
CT_DoExecLog ALL make ${JOBSFLAGS} -C gcc ${libgcc_rule} \
${repair_cc}
sed -r -i -e 's@-lc@@g' gcc/${libgcc_rule}
else # build_libgcc
core_targets=( gcc )
fi # ! build libgcc
if [ "${build_libstdcxx}" = "yes" \
-a "${CT_CC_LANG_CXX}" = "y" \
]; then
core_targets+=( target-libstdc++-v3 )
fi
if [ "${build_libgfortran}" = "yes" \
-a "${CT_CC_LANG_FORTRAN}" = "y" \
]; then
core_targets+=( target-libgfortran )
fi
core_targets_all="${core_targets[@]/#/all-}"
core_targets_install="${core_targets[@]/#/install-}"
case "${build_step}" in
gcc_build|gcc_host)
core_targets_all=all
core_targets_install=install
;;
esac
CT_DoLog EXTRA "Building ${log_txt}"
CT_DoExecLog ALL make ${JOBSFLAGS} ${core_targets_all}
# Do not pass ${JOBSFLAGS} here: recent GCC builds have been failing
# in parallel 'make install' at random locations: libitm, libcilk,
# always for the files that are installed more than once to the same
# location (such as libitm.info).
# The symptom is that the install command fails with "File exists"
# error; running the same command manually succeeds. It looks like
# attempts to remove the destination and re-create it, but another
# install gets in the way.
CT_DoLog EXTRA "Installing ${log_txt}"
CT_DoExecLog ALL make ${core_targets_install}
# Remove the libtool "pseudo-libraries": having them in the installed
# tree makes the libtoolized utilities that are built next assume
# that, for example, libsupc++ is an "accessory library", and not include
# -lsupc++ to the link flags. That breaks ltrace, for example.
CT_DoLog EXTRA "Housekeeping for core gcc compiler"
CT_Pushd "${prefix}"
find . -type f -name "*.la" -exec rm {} \; |CT_DoLog ALL
CT_Popd
if [ "${build_manuals}" = "yes" ]; then
CT_DoLog EXTRA "Building the GCC manuals"
CT_DoExecLog ALL make pdf html
CT_DoLog EXTRA "Installing the GCC manuals"
CT_DoExecLog ALL make install-{pdf,html}-gcc
fi
# Create a symlink ${CT_TARGET}-cc to ${CT_TARGET}-${CT_CC} to always be able
# to call the C compiler with the same, somewhat canonical name.
# check whether compiler has an extension
file="$( ls -1 "${prefix}/bin/${CT_TARGET}-${CT_CC}."* 2>/dev/null || true )"
[ -z "${file}" ] || ext=".${file##*.}"
if [ -f "${prefix}/bin/${CT_TARGET}-${CT_CC}${ext}" ]; then
CT_DoExecLog ALL ln -sfv "${CT_TARGET}-${CT_CC}${ext}" "${prefix}/bin/${CT_TARGET}-cc${ext}"
fi
cc_gcc_multilib_housekeeping cc="${prefix}/bin/${CT_TARGET}-${CT_CC}" \
host="${host}"
# If binutils want the LTO plugin, point them to it
if [ -d "${CT_PREFIX_DIR}/lib/bfd-plugins" -a "${build_step}" = "gcc_host" ]; then
local gcc_version=$(cat "${CT_SRC_DIR}/gcc/gcc/BASE-VER" )
CT_DoExecLog ALL ln -sfv "../../libexec/gcc/${CT_TARGET}/${gcc_version}/liblto_plugin.so" \
"${CT_PREFIX_DIR}/lib/bfd-plugins/liblto_plugin.so"
fi
}
#------------------------------------------------------------------------------
# Build complete gcc to run on build
do_cc_for_build() {
local -a build_final_opts
local build_final_backend
# If native or simple cross toolchain is being built, then build==host;
# nothing to do.
case "${CT_TOOLCHAIN_TYPE}" in
native|cross) return 0;;
esac
build_final_opts+=( "host=${CT_BUILD}" )
build_final_opts+=( "prefix=${CT_BUILDTOOLS_PREFIX_DIR}" )
build_final_opts+=( "complibs=${CT_BUILDTOOLS_PREFIX_DIR}" )
build_final_opts+=( "cflags=${CT_CFLAGS_FOR_BUILD}" )
build_final_opts+=( "ldflags=${CT_LDFLAGS_FOR_BUILD}" )
build_final_opts+=( "lang_list=$( cc_gcc_lang_list )" )
build_final_opts+=( "build_step=gcc_build" )
if [ "${CT_BARE_METAL}" = "y" ]; then
# In the tests I've done, bare-metal was not impacted by the
# lack of such a compiler, but better safe than sorry...
build_final_opts+=( "mode=baremetal" )
build_final_opts+=( "build_libgcc=yes" )
build_final_opts+=( "build_libstdcxx=yes" )
build_final_opts+=( "build_libgfortran=yes" )
if [ "${CT_STATIC_TOOLCHAIN}" = "y" ]; then
build_final_opts+=( "build_staticlinked=yes" )
fi
build_final_backend=do_gcc_core_backend
else
build_final_backend=do_gcc_backend
fi
CT_DoStep INFO "Installing final gcc compiler for build"
CT_mkdir_pushd "${CT_BUILD_DIR}/build-cc-gcc-final-build-${CT_BUILD}"
"${build_final_backend}" "${build_final_opts[@]}"
CT_Popd
CT_EndStep
}
gcc_movelibs() {
local multi_flags multi_dir multi_os_dir multi_os_dir_gcc multi_root multi_index multi_count
local gcc_dir dst_dir
local rel
for arg in "$@"; do
eval "${arg// /\\ }"
done
# Move only files, directories are for other multilibs. We're looking inside
# GCC's directory structure, thus use unmangled multi_os_dir that GCC reports.
gcc_dir="${CT_PREFIX_DIR}/${CT_TARGET}/lib/${multi_os_dir_gcc}"
if [ ! -d "${gcc_dir}" ]; then
# GCC didn't install anything outside of sysroot
return
fi
# Depending on the selected libc, we may or may not have the ${multi_os_dir_gcc}
# created by libc installation. If we do, use it. If we don't, use ${multi_os_dir}
# to avoid creating an otherwise empty directory.
dst_dir="${multi_root}/lib/${multi_os_dir_gcc}"
if [ ! -d "${dst_dir}" ]; then
dst_dir="${multi_root}/lib/${multi_os_dir}"
fi
CT_SanitizeVarDir dst_dir gcc_dir
rel=$( echo "${gcc_dir#${CT_PREFIX_DIR}/}" | sed 's#[^/]\{1,\}#..#g' )
ls "${gcc_dir}" | while read f; do
case "${f}" in
*.ld)
# Linker scripts remain in GCC's directory; elf2flt insists on
# finding them there.
continue
;;
esac
if [ -f "${gcc_dir}/${f}" ]; then
CT_DoExecLog ALL mkdir -p "${dst_dir}"
CT_DoExecLog ALL mv "${gcc_dir}/${f}" "${dst_dir}/${f}"
CT_DoExecLog ALL ln -sf "${rel}/${dst_dir#${CT_PREFIX_DIR}/}/${f}" "${gcc_dir}/${f}"
fi
done
}
#------------------------------------------------------------------------------
# Build final gcc to run on host
do_cc_for_host() {
local -a final_opts
local final_backend
final_opts+=( "host=${CT_HOST}" )
final_opts+=( "prefix=${CT_PREFIX_DIR}" )
final_opts+=( "complibs=${CT_HOST_COMPLIBS_DIR}" )
final_opts+=( "cflags=${CT_CFLAGS_FOR_HOST}" )
final_opts+=( "ldflags=${CT_LDFLAGS_FOR_HOST}" )
final_opts+=( "lang_list=$( cc_gcc_lang_list )" )
final_opts+=( "build_step=gcc_host" )
if [ "${CT_BUILD_MANUALS}" = "y" ]; then
final_opts+=( "build_manuals=yes" )
fi
if [ "${CT_BARE_METAL}" = "y" ]; then
final_opts+=( "mode=baremetal" )
final_opts+=( "build_libgcc=yes" )
final_opts+=( "build_libstdcxx=yes" )
final_opts+=( "build_libgfortran=yes" )
if [ "${CT_STATIC_TOOLCHAIN}" = "y" ]; then
final_opts+=( "build_staticlinked=yes" )
fi
final_backend=do_gcc_core_backend
else
final_backend=do_gcc_backend
fi
CT_DoStep INFO "Installing final gcc compiler"
CT_mkdir_pushd "${CT_BUILD_DIR}/build-cc-gcc-final"
"${final_backend}" "${final_opts[@]}"
CT_Popd
# GCC installs stuff (including libgcc) into its own /lib dir,
# outside of sysroot, breaking linking with -static-libgcc.
# Fix up by moving the libraries into the sysroot.
if [ "${CT_USE_SYSROOT}" = "y" ]; then
CT_mkdir_pushd "${CT_BUILD_DIR}/build-cc-gcc-final-movelibs"
CT_IterateMultilibs gcc_movelibs movelibs
CT_Popd
fi
CT_EndStep
}
#------------------------------------------------------------------------------
# Build the final gcc
# Usage: do_gcc_backend param=value [...]
# Parameter : Definition : Type : Default
# host : the host we run onto : tuple : (none)
# prefix : the runtime prefix : dir : (none)
# complibs : the companion libraries prefix : dir : (none)
# cflags : cflags to use : string : (empty)
# ldflags : ldflags to use : string : (empty)
# lang_list : the list of languages to build : string : (empty)
# build_manuals : whether to build manuals or not : bool : no
do_gcc_backend() {
local host
local prefix
local complibs
local lang_list
local cflags
local cflags_for_build
local ldflags
local build_manuals
local -a host_libstdcxx_flags
local -a extra_config
local -a final_LDFLAGS
local tmp
local arg
for arg in "$@"; do
eval "${arg// /\\ }"
done
CT_DoLog EXTRA "Configuring final gcc compiler"
# Enable selected languages
extra_config+=("--enable-languages=${lang_list}")
for tmp in ARCH ABI CPU TUNE FPU FLOAT; do
eval tmp="\${CT_ARCH_WITH_${tmp}}"
if [ -n "${tmp}" ]; then
extra_config+=("${tmp}")
fi
done
[ -n "${CT_PKGVERSION}" ] && extra_config+=("--with-pkgversion=${CT_PKGVERSION}")
[ -n "${CT_TOOLCHAIN_BUGURL}" ] && extra_config+=("--with-bugurl=${CT_TOOLCHAIN_BUGURL}")
if [ "${CT_SHARED_LIBS}" != "y" ]; then
extra_config+=("--disable-shared")
fi
case "${CT_CC_GCC_SJLJ_EXCEPTIONS}" in
y) extra_config+=("--enable-sjlj-exceptions");;
m) ;;
"") extra_config+=("--disable-sjlj-exceptions");;
esac
if [ "${CT_CC_CXA_ATEXIT}" = "y" ]; then
extra_config+=("--enable-__cxa_atexit")
else
extra_config+=("--disable-__cxa_atexit")
fi
if [ -n "${CT_CC_GCC_ENABLE_CXX_FLAGS}" ]; then
extra_config+=("--enable-cxx-flags=${CT_CC_GCC_ENABLE_CXX_FLAGS}")
fi
if [ "${CT_THREADS}" = "none" ]; then
extra_config+=(--disable-libatomic)
fi
if [ "${CT_CC_GCC_LIBMUDFLAP}" = "y" ]; then
extra_config+=(--enable-libmudflap)
else
extra_config+=(--disable-libmudflap)
fi
if [ "${CT_CC_GCC_LIBGOMP}" = "y" ]; then
extra_config+=(--enable-libgomp)
else
extra_config+=(--disable-libgomp)
fi
if [ "${CT_CC_GCC_LIBSSP}" = "y" ]; then
extra_config+=(--enable-libssp)
else
extra_config+=(--disable-libssp)
fi
if [ "${CT_CC_GCC_LIBQUADMATH}" = "y" ]; then
extra_config+=(--enable-libquadmath)
extra_config+=(--enable-libquadmath-support)
else
extra_config+=(--disable-libquadmath)
extra_config+=(--disable-libquadmath-support)
fi
if [ "${CT_CC_GCC_LIBSANITIZER}" = "y" ]; then
extra_config+=(--enable-libsanitizer)
else
extra_config+=(--disable-libsanitizer)
fi
if [ "${CT_CC_GCC_HAS_LIBMPX}" = "y" ]; then
if [ "${CT_CC_GCC_LIBMPX}" = "y" ]; then
extra_config+=(--enable-libmpx)
else
extra_config+=(--disable-libmpx)
fi
fi
final_LDFLAGS+=("${ldflags}")
# *** WARNING ! ***
# Keep this full if-else-if-elif-fi-fi block in sync
# with the same block in do_gcc_core_backend, above.
if [ "${CT_STATIC_TOOLCHAIN}" = "y" ]; then
final_LDFLAGS+=("-static")
host_libstdcxx_flags+=("-static-libgcc")
host_libstdcxx_flags+=("-Wl,-Bstatic,-lstdc++")
host_libstdcxx_flags+=("-lm")
# Companion libraries are build static (eg !shared), so
# the libstdc++ is not pulled automatically, although it
# is needed. Shoe-horn it in our LDFLAGS
# Ditto libm on some Fedora boxen
final_LDFLAGS+=("-lstdc++")
final_LDFLAGS+=("-lm")
else
if [ "${CT_CC_GCC_STATIC_LIBSTDCXX}" = "y" ]; then
# this is from CodeSourcery arm-2010q1-202-arm-none-linux-gnueabi.src.tar.bz2
# build script
# INFO: if the host gcc is gcc-4.5 then presumably we could use -static-libstdc++,
# see http://gcc.gnu.org/ml/gcc-patches/2009-06/msg01635.html
host_libstdcxx_flags+=("-static-libgcc")
host_libstdcxx_flags+=("-Wl,-Bstatic,-lstdc++,-Bdynamic")
host_libstdcxx_flags+=("-lm")
fi
# When companion libraries are build static (eg !shared),
# the libstdc++ is not pulled automatically, although it
# is needed. Shoe-horn it in our LDFLAGS
# Ditto libm on some Fedora boxen
final_LDFLAGS+=("-lstdc++")
final_LDFLAGS+=("-lm")
fi
extra_config+=("--with-gmp=${complibs}")
extra_config+=("--with-mpfr=${complibs}")
extra_config+=("--with-mpc=${complibs}")
if [ "${CT_CC_GCC_USE_GRAPHITE}" = "y" ]; then
if [ "${CT_ISL}" = "y" ]; then
extra_config+=("--with-isl=${complibs}")
fi
if [ "${CT_CLOOG}" = "y" ]; then
extra_config+=("--with-cloog=${complibs}")
fi
else
extra_config+=("--with-isl=no")
extra_config+=("--with-cloog=no")
fi
if [ "${CT_CC_GCC_USE_LTO}" = "y" ]; then
extra_config+=("--enable-lto")
else
extra_config+=("--disable-lto")
fi
if [ ${#host_libstdcxx_flags[@]} -ne 0 ]; then
extra_config+=("--with-host-libstdcxx=${host_libstdcxx_flags[*]}")
fi
if [ "${CT_THREADS}" = "none" ]; then
extra_config+=("--disable-threads")
else
if [ "${CT_THREADS}" = "win32" ]; then
extra_config+=("--enable-threads=win32")
extra_config+=("--disable-win32-registry")
else
extra_config+=("--enable-threads=posix")
fi
fi
if [ "${CT_CC_GCC_ENABLE_TARGET_OPTSPACE}" = "y" ]; then
extra_config+=("--enable-target-optspace")
fi
if [ "${CT_CC_GCC_DISABLE_PCH}" = "y" ]; then
extra_config+=("--disable-libstdcxx-pch")
fi
case "${CT_CC_GCC_LDBL_128}" in
y) extra_config+=("--with-long-double-128");;
m) ;;
"") extra_config+=("--without-long-double-128");;
esac
if [ "${CT_CC_GCC_BUILD_ID}" = "y" ]; then
extra_config+=( --enable-linker-build-id )
fi
case "${CT_CC_GCC_LNK_HASH_STYLE}" in
"") ;;
*) extra_config+=( "--with-linker-hash-style=${CT_CC_GCC_LNK_HASH_STYLE}" );;
esac
case "${CT_CC_GCC_DEC_FLOATS}" in
"") ;;
*) extra_config+=( "--enable-decimal-float=${CT_CC_GCC_DEC_FLOATS}" );;
esac
if [ "${CT_CC_GCC_ENABLE_PLUGINS}" = "y" ]; then
extra_config+=( --enable-plugin )
else
extra_config+=( --disable-plugin )
fi
if [ "${CT_CC_GCC_GOLD}" = "y" ]; then
extra_config+=( --enable-gold )
fi
case "${CT_ARCH}" in
mips)
case "${CT_CC_GCC_mips_llsc}" in
y) extra_config+=( --with-llsc );;
m) ;;
*) extra_config+=( --without-llsc );;
esac
case "${CT_CC_GCC_mips_synci}" in
y) extra_config+=( --with-synci );;
m) ;;
*) extra_config+=( --without-synci );;
esac
if [ "${CT_CC_GCC_mips_plt}" ]; then
extra_config+=( --with-mips-plt )
fi
;; # ARCH is mips
esac
if [ "${CT_TOOLCHAIN_ENABLE_NLS}" = "y" ]; then
extra_config+=("--with-libintl-prefix=${complibs}")
else
extra_config+=("--disable-nls")
fi
if [ "${CT_CC_GCC_SYSTEM_ZLIB}" = "y" ]; then
extra_config+=("--with-system-zlib")
fi
case "${CT_CC_GCC_CONFIG_TLS}" in
y) extra_config+=("--enable-tls");;
m) ;;
"") extra_config+=("--disable-tls");;
esac
# Some versions of gcc have a defective --enable-multilib.
# Since that's the default, only pass --disable-multilib.
if [ "${CT_MULTILIB}" != "y" ]; then
extra_config+=("--disable-multilib")
else
extra_config+=("--enable-multiarch")
if [ -n "${CT_CC_GCC_MULTILIB_LIST}" ]; then
extra_config+=("--with-multilib-list=${CT_CC_GCC_MULTILIB_LIST}")
fi
fi
CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
# We may need to modify host/build CFLAGS separately below
cflags_for_build="${cflags}"
# Clang's default bracket-depth is 256, and building GCC
# requires somewhere between 257 and 512.
if [ "${host}" = "${CT_BUILD}" ]; then
if ${CT_BUILD}-gcc --version 2>&1 | grep clang; then
cflags="$cflags "-fbracket-depth=512
cflags_for_build="$cflags_for_build "-fbracket-depth=512
fi
else
# FIXME we currently don't support clang as host compiler, only as build
if ${CT_BUILD}-gcc --version 2>&1 | grep clang; then
cflags_for_build="$cflags_for_build "-fbracket-depth=512
fi
fi
# NB: not using CT_ALL_TARGET_CFLAGS/CT_ALL_TARGET_LDFLAGS here!
# See do_gcc_core_backend for explanation.
CT_DoExecLog CFG \
CC_FOR_BUILD="${CT_BUILD}-gcc" \
CFLAGS="${cflags}" \
CFLAGS_FOR_BUILD="${cflags_for_build}" \
CXXFLAGS="${cflags}" \
CXXFLAGS_FOR_BUILD="${cflags_for_build}" \
LDFLAGS="${final_LDFLAGS[*]}" \
CFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}" \
CXXFLAGS_FOR_TARGET="${CT_TARGET_CFLAGS}" \
LDFLAGS_FOR_TARGET="${CT_TARGET_LDFLAGS}" \
${CONFIG_SHELL} \
"${CT_SRC_DIR}/gcc/configure" \
--build=${CT_BUILD} \
--host=${host} \
--target=${CT_TARGET} \
--prefix="${prefix}" \
${CT_CC_SYSROOT_ARG} \
"${extra_config[@]}" \
--with-local-prefix="${CT_SYSROOT_DIR}" \
--enable-long-long \
"${CT_CC_GCC_EXTRA_CONFIG_ARRAY[@]}"
if [ "${CT_CANADIAN}" = "y" ]; then
CT_DoLog EXTRA "Building libiberty"
CT_DoExecLog ALL make ${JOBSFLAGS} all-build-libiberty
fi
CT_DoLog EXTRA "Building final gcc compiler"
CT_DoExecLog ALL make ${JOBSFLAGS} all
# See the note on issues with parallel 'make install' in GCC above.
CT_DoLog EXTRA "Installing final gcc compiler"
if [ "${CT_STRIP_TARGET_TOOLCHAIN_EXECUTABLES}" = "y" ]; then
CT_DoExecLog ALL make install-strip
else
CT_DoExecLog ALL make install
fi
# Remove the libtool "pseudo-libraries": having them in the installed
# tree makes the libtoolized utilities that are built next assume
# that, for example, libsupc++ is an "accessory library", and not include
# -lsupc++ to the link flags. That breaks ltrace, for example.
CT_DoLog EXTRA "Housekeeping for final gcc compiler"
CT_Pushd "${prefix}"
find . -type f -name "*.la" -exec rm {} \; |CT_DoLog ALL
CT_Popd
if [ "${build_manuals}" = "yes" ]; then
CT_DoLog EXTRA "Building the GCC manuals"
CT_DoExecLog ALL make pdf html
CT_DoLog EXTRA "Installing the GCC manuals"
CT_DoExecLog ALL make install-{pdf,html}-gcc
fi
# Create a symlink ${CT_TARGET}-cc to ${CT_TARGET}-${CT_CC} to always be able
# to call the C compiler with the same, somewhat canonical name.
# check whether compiler has an extension
file="$( ls -1 "${CT_PREFIX_DIR}/bin/${CT_TARGET}-${CT_CC}."* 2>/dev/null || true )"
[ -z "${file}" ] || ext=".${file##*.}"
if [ -f "${CT_PREFIX_DIR}/bin/${CT_TARGET}-${CT_CC}${ext}" ]; then
CT_DoExecLog ALL ln -sfv "${CT_TARGET}-${CT_CC}${ext}" "${prefix}/bin/${CT_TARGET}-cc${ext}"
fi
cc_gcc_multilib_housekeeping cc="${prefix}/bin/${CT_TARGET}-${CT_CC}" \
host="${host}"
# If binutils want the LTO plugin, point them to it
if [ -d "${CT_PREFIX_DIR}/lib/bfd-plugins" -a "${build_step}" = "gcc_host" ]; then
local gcc_version=$(cat "${CT_SRC_DIR}/gcc/gcc/BASE-VER" )
CT_DoExecLog ALL ln -sfv "../../libexec/gcc/${CT_TARGET}/${gcc_version}/liblto_plugin.so" \
"${CT_PREFIX_DIR}/lib/bfd-plugins/liblto_plugin.so"
fi
}
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