[gcc r15-11483] libstdc++: Fix grep for linker warning about --gc-sections [PR126452]
Jonathan Wakely via Gcc-cvs <[email protected]>
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https://gcc.gnu.org/g:83876d9d6b3249376f80c8c7d6156a912dc8dea0 commit r15-11483-g83876d9d6b3249376f80c8c7d6156a912dc8dea0 Author: Jonathan Wakely <[email protected]> Date: Wed Jul 29 16:55:39 2026 +0100 libstdc++: Fix grep for linker warning about --gc-sections [PR126452] Current versions of GNU ld print "warning" with a lowercase 'w' so adjust the grep patter. Also use LC_ALL=C to ensure the warning isn't translated. Because m4 uses square brackets as quotes, we need to use double brackets in the grep pattern to expand to "[Ww]" in the configure script. libstdc++-v3/ChangeLog: PR libstdc++/126452 * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Use LC_ALL_C and match both "Warning" and "warning" in ld output. * configure: Regenerate. Reviewed-by: Jakub Jelinek <[email protected]> (cherry picked from commit b7ce998a967639b955159eeeae940cb069c518d8) Diff: --- libstdc++-v3/acinclude.m4 | 4 ++-- libstdc++-v3/configure | 36 ++++++++++++++++++------------------ 2 files changed, 20 insertions(+), 20 deletions(-) diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4 index a0094c2dd95b..7d31f9692435 100644 --- a/libstdc++-v3/acinclude.m4 +++ b/libstdc++-v3/acinclude.m4 @@ -253,8 +253,8 @@ AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [ rm -f conftest.c touch conftest.c if $CC -c conftest.c; then - if $LD --gc-sections -o conftest conftest.o 2>&1 | \ - grep "Warning: gc-sections option ignored" > /dev/null; then + if LC_ALL=C $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[[Ww]]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure index 527548051d53..8a4cd513baa7 100755 --- a/libstdc++-v3/configure +++ b/libstdc++-v3/configure @@ -23015,8 +23015,8 @@ rm -f core conftest.err conftest.$ac_objext \ rm -f conftest.c touch conftest.c if $CC -c conftest.c; then - if $LD --gc-sections -o conftest conftest.o 2>&1 | \ - grep "Warning: gc-sections option ignored" > /dev/null; then + if LC_ALL=C $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -28882,8 +28882,8 @@ rm -f core conftest.err conftest.$ac_objext \ rm -f conftest.c touch conftest.c if $CC -c conftest.c; then - if $LD --gc-sections -o conftest conftest.o 2>&1 | \ - grep "Warning: gc-sections option ignored" > /dev/null; then + if LC_ALL=C $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -32061,8 +32061,8 @@ rm -f core conftest.err conftest.$ac_objext \ rm -f conftest.c touch conftest.c if $CC -c conftest.c; then - if $LD --gc-sections -o conftest conftest.o 2>&1 | \ - grep "Warning: gc-sections option ignored" > /dev/null; then + if LC_ALL=C $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -38279,8 +38279,8 @@ rm -f core conftest.err conftest.$ac_objext \ rm -f conftest.c touch conftest.c if $CC -c conftest.c; then - if $LD --gc-sections -o conftest conftest.o 2>&1 | \ - grep "Warning: gc-sections option ignored" > /dev/null; then + if LC_ALL=C $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -38567,8 +38567,8 @@ rm -f core conftest.err conftest.$ac_objext \ rm -f conftest.c touch conftest.c if $CC -c conftest.c; then - if $LD --gc-sections -o conftest conftest.o 2>&1 | \ - grep "Warning: gc-sections option ignored" > /dev/null; then + if LC_ALL=C $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -39032,8 +39032,8 @@ rm -f core conftest.err conftest.$ac_objext \ rm -f conftest.c touch conftest.c if $CC -c conftest.c; then - if $LD --gc-sections -o conftest conftest.o 2>&1 | \ - grep "Warning: gc-sections option ignored" > /dev/null; then + if LC_ALL=C $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -42474,8 +42474,8 @@ rm -f core conftest.err conftest.$ac_objext \ rm -f conftest.c touch conftest.c if $CC -c conftest.c; then - if $LD --gc-sections -o conftest conftest.o 2>&1 | \ - grep "Warning: gc-sections option ignored" > /dev/null; then + if LC_ALL=C $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -45869,8 +45869,8 @@ rm -f core conftest.err conftest.$ac_objext \ rm -f conftest.c touch conftest.c if $CC -c conftest.c; then - if $LD --gc-sections -o conftest conftest.o 2>&1 | \ - grep "Warning: gc-sections option ignored" > /dev/null; then + if LC_ALL=C $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -46082,8 +46082,8 @@ rm -f core conftest.err conftest.$ac_objext \ rm -f conftest.c touch conftest.c if $CC -c conftest.c; then - if $LD --gc-sections -o conftest conftest.o 2>&1 | \ - grep "Warning: gc-sections option ignored" > /dev/null; then + if LC_ALL=C $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi