[gcc r16-9547] 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:7f84e9af923261f3fdd7f15b064c449b7d4157b9 commit r16-9547-g7f84e9af923261f3fdd7f15b064c449b7d4157b9 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 a615692e7beb..e8c913d9cb59 100644 --- a/libstdc++-v3/acinclude.m4 +++ b/libstdc++-v3/acinclude.m4 @@ -261,8 +261,8 @@ 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 $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[[Ww]]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure index bc9dce5e2880..5a8d4ae09921 100755 --- a/libstdc++-v3/configure +++ b/libstdc++-v3/configure @@ -23198,8 +23198,8 @@ rm -f core conftest.err conftest.$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 $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -29199,8 +29199,8 @@ rm -f core conftest.err conftest.$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 $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -32381,8 +32381,8 @@ rm -f core conftest.err conftest.$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 $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -38602,8 +38602,8 @@ rm -f core conftest.err conftest.$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 $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -38893,8 +38893,8 @@ rm -f core conftest.err conftest.$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 $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -39361,8 +39361,8 @@ rm -f core conftest.err conftest.$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 $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -42806,8 +42806,8 @@ rm -f core conftest.err conftest.$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 $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -46204,8 +46204,8 @@ rm -f core conftest.err conftest.$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 $LD --gc-sections -o conftest conftest.o 2>&1 | \ + grep "[Ww]arning: gc-sections option ignored" > /dev/null; then ac_gcsections=no fi fi @@ -46420,8 +46420,8 @@ rm -f core conftest.err conftest.$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