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eclass/toolchain-funcs: Sync with Gentoo

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It's from Gentoo commit b1619cb5f7d2fafae4adeaa9b25182eb6f658c17.
This commit is contained in:
Flatcar Buildbot 2024-08-19 07:18:43 +00:00 committed by Krzesimir Nowak
parent b240515b72
commit 8793fd692a
1 changed files with 82 additions and 8 deletions
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90
sdk_container/src/third_party/portage-stable/eclass/toolchain-funcs.eclass vendored
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@ -447,6 +447,41 @@ econf_build() {
tc-env_build econf_env "$@"
}
# @FUNCTION: tc-ld-is-bfd
# @USAGE: [toolchain prefix]
# @DESCRIPTION:
# Return true if the current linker is set to GNU bfd.
tc-ld-is-bfd() {
local out
# Ensure ld output is in English.
local -x LC_ALL=C
# First check the linker directly.
out=$($(tc-getLD "$@") --version 2>&1)
if [[ ${out} != "GNU ld"* ]] ; then
return 1
fi
# Then see if they're selecting bfd via compiler flags.
# Note: We're assuming they're using LDFLAGS to hold the
# options and not CFLAGS/CXXFLAGS.
local base="${T}/test-tc-linker"
cat <<-EOF > "${base}.c"
int main(void) { return 0; }
EOF
out=$($(tc-getCC "$@") ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} -Wl,--version "${base}.c" -o "${base}" 2>&1)
rm -f "${base}"*
if [[ ! ${out} =~ .*^"GNU ld".* ]] ; then
return 1
fi
# It's bfd!
# We use positive logic here unlike tc-ld-is-gold and tc-ld-is-mold
# because LD might be bfd even if *FLAGS isn't.
return 0
}
# @FUNCTION: tc-ld-is-gold
# @USAGE: [toolchain prefix]
# @DESCRIPTION:
@ -466,7 +501,7 @@ tc-ld-is-gold() {
# Then see if they're selecting gold via compiler flags.
# Note: We're assuming they're using LDFLAGS to hold the
# options and not CFLAGS/CXXFLAGS.
local base="${T}/test-tc-gold"
local base="${T}/test-tc-linker"
cat <<-EOF > "${base}.c"
int main(void) { return 0; }
EOF
@ -499,7 +534,7 @@ tc-ld-is-lld() {
# Then see if they're selecting lld via compiler flags.
# Note: We're assuming they're using LDFLAGS to hold the
# options and not CFLAGS/CXXFLAGS.
local base="${T}/test-tc-lld"
local base="${T}/test-tc-linker"
cat <<-EOF > "${base}.c"
int main(void) { return 0; }
EOF
@ -513,8 +548,43 @@ tc-ld-is-lld() {
return 1
}
# @FUNCTION: tc-ld-is-mold
# @USAGE: [toolchain prefix]
# @DESCRIPTION:
# Return true if the current linker is set to mold.
tc-ld-is-mold() {
local out
# Ensure ld output is in English.
local -x LC_ALL=C
# First check the linker directly.
out=$($(tc-getLD "$@") --version 2>&1)
if [[ ${out} == *"mold"* ]] ; then
return 0
fi
# Then see if they're selecting mold via compiler flags.
# Note: We're assuming they're using LDFLAGS to hold the
# options and not CFLAGS/CXXFLAGS.
local base="${T}/test-tc-linker"
cat <<-EOF > "${base}.c"
int main(void) { return 0; }
EOF
out=$($(tc-getCC "$@") ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} -Wl,--version "${base}.c" -o "${base}" 2>&1)
rm -f "${base}"*
if [[ ${out} == *"mold"* ]] ; then
return 0
fi
# No mold here!
return 1
}
# @FUNCTION: tc-ld-disable-gold
# @USAGE: [toolchain prefix]
# @DEPRECATED: tc-ld-force-bfd
# @DESCRIPTION:
# If the gold linker is currently selected, configure the compilation
# settings so that we use the older bfd linker instead.
@ -525,11 +595,12 @@ tc-ld-disable-gold() {
# @FUNCTION: tc-ld-force-bfd
# @USAGE: [toolchain prefix]
# @DESCRIPTION:
# If the gold or lld linker is currently selected, configure the compilation
# settings so that we use the bfd linker instead.
# If a linker other than bfd is currently selected, configure the compilation
# settings so that we use the bfd linker instead. This function should not
# be used for simple underlinking problems. This function is intended for use
# when a package is fragile and/or relies on bfd internals.
tc-ld-force-bfd() {
if ! tc-ld-is-gold "$@" && ! tc-ld-is-lld "$@" ; then
# They aren't using gold or lld, so nothing to do!
if tc-ld-is-bfd "$@" ; then
return
fi
@ -544,6 +615,8 @@ tc-ld-force-bfd() {
# Set up LDFLAGS to select bfd based on the gcc / clang version.
if tc-is-gcc || tc-is-clang ; then
export CFLAGS="${CFLAGS} -fuse-ld=bfd"
export CXXFLAGS="${CXXFLAGS} -fuse-ld=bfd"
export LDFLAGS="${LDFLAGS} -fuse-ld=bfd"
fi
}
@ -561,8 +634,9 @@ _tc-has-openmp() {
int nthreads, tid, ret = 0;
#pragma omp parallel private(nthreads, tid)
{
tid = omp_get_thread_num();
nthreads = omp_get_num_threads(); ret += tid + nthreads;
tid = omp_get_thread_num();
nthreads = omp_get_num_threads();
ret += tid + nthreads;
}
return ret;
}