https://gcc.gnu.org/g:7626f7250fd05dab18f4f6a05a92571855f68241
commit r17-1848-g7626f7250fd05dab18f4f6a05a92571855f68241 Author: Pietro Monteiro <[email protected]> Date: Thu Jun 25 08:29:18 2026 -0400 libstdc++: Update AC_TRY_LINK to AC_LINK_IFELSE [PR103459] AC_TRY_LINK has been deprecated by Autoconf. Update to AC_LINK_IFELSE. No changes to generated files. PR bootstrap/103459 libstdc++-v3/ChangeLog: * acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Update AC_TRY_LINK to AC_LINK_IFELSE. (GLIBCXX_ENABLE_LIBSTDCXX_TIME): Likewise. (GLIBCXX_ENABLE_ATOMIC_BUILTINS): Likewise. (GLIBCXX_ENABLE_BACKTRACE): Likewise. Signed-off-by: Pietro Monteiro <[email protected]> Diff: --- libstdc++-v3/acinclude.m4 | 52 +++++++++++++++++++++++++---------------------- 1 file changed, 28 insertions(+), 24 deletions(-) diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4 index 6a06464d0411..7afd6a50c969 100644 --- a/libstdc++-v3/acinclude.m4 +++ b/libstdc++-v3/acinclude.m4 @@ -254,9 +254,9 @@ AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [ # Check for -Wl,--gc-sections AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections]) - AC_TRY_LINK([ int one(void) { return 1; } + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ int one(void) { return 1; } int two(void) { return 2; } - ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no]) + ]], [[ two(); ]])] , [ac_gcsections=yes], [ac_gcsections=no]) if test "$ac_gcsections" = "yes"; then rm -f conftest.c touch conftest.c @@ -1862,41 +1862,41 @@ AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [ if test x"$ac_has_unistd_h" = x"yes"; then AC_MSG_CHECKING([for monotonic clock]) - AC_TRY_LINK( - [#include <unistd.h> + AC_LINK_IFELSE([AC_LANG_PROGRAM( + [[#include <unistd.h> #include <time.h> - ], - [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) + ]], + [[#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) timespec tp; #endif clock_gettime(CLOCK_MONOTONIC, &tp); - ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no]) + ]])], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no]) AC_MSG_RESULT($ac_has_clock_monotonic) AC_MSG_CHECKING([for realtime clock]) - AC_TRY_LINK( - [#include <unistd.h> + AC_LINK_IFELSE([AC_LANG_PROGRAM( + [[#include <unistd.h> #include <time.h> - ], - [#if _POSIX_TIMERS > 0 + ]], + [[#if _POSIX_TIMERS > 0 timespec tp; #endif clock_gettime(CLOCK_REALTIME, &tp); - ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no]) + ]])], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no]) AC_MSG_RESULT($ac_has_clock_realtime) AC_MSG_CHECKING([for nanosleep]) - AC_TRY_LINK( - [#include <unistd.h> + AC_LINK_IFELSE([AC_LANG_PROGRAM( + [[#include <unistd.h> #include <time.h> - ], - [#if _POSIX_TIMERS > 0 + ]], + [[#if _POSIX_TIMERS > 0 timespec tp; #endif nanosleep(&tp, 0); - ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no]) + ]])], [ac_has_nanosleep=yes], [ac_has_nanosleep=no]) AC_MSG_RESULT($ac_has_nanosleep) fi @@ -3775,9 +3775,9 @@ AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [ AC_CACHE_CHECK([for atomic builtins for _Atomic_word], glibcxx_cv_atomic_word, - [AC_TRY_LINK([#include "atomic_word.h"], - [_Atomic_word a = 0, b; - b = __atomic_fetch_add(&a, 1, __ATOMIC_ACQ_REL);], + [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include "atomic_word.h"]], + [[_Atomic_word a = 0, b; + b = __atomic_fetch_add(&a, 1, __ATOMIC_ACQ_REL);]])], [glibcxx_cv_atomic_word=yes], [glibcxx_cv_atomic_word=no])]) @@ -4042,7 +4042,11 @@ if test $enable_symvers = gnu || AC_MSG_CHECKING([for shared libgcc]) ac_save_CFLAGS="$CFLAGS" CFLAGS=' -lgcc_s' - AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no) + AC_LINK_IFELSE([AC_LANG_PROGRAM( + [[]], + [[return 0;]])], + [glibcxx_shared_libgcc=yes], + [glibcxx_shared_libgcc=no]) CFLAGS="$ac_save_CFLAGS" if test $glibcxx_shared_libgcc = no; then cat > conftest.c <<EOF @@ -4057,7 +4061,7 @@ changequote([,])dnl rm -f conftest.c conftest.so if test x${glibcxx_libgcc_s_suffix+set} = xset; then CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix" - AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes) + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[return 0;]])], [glibcxx_shared_libgcc=yes]) CFLAGS="$ac_save_CFLAGS" fi fi @@ -5286,7 +5290,7 @@ AC_DEFUN([GLIBCXX_ENABLE_BACKTRACE], [ AC_CACHE_CHECK([for atomic builtins for libbacktrace], glibcxx_cv_libbacktrace_atomics, - [AC_TRY_LINK([], [ + [AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ int i = 0; int* p = &i; __SIZE_TYPE__ s = 0; @@ -5300,7 +5304,7 @@ AC_DEFUN([GLIBCXX_ENABLE_BACKTRACE], [ __atomic_store_n(&s, s, __ATOMIC_RELEASE); // backtrace_atomic_store_int __atomic_store_n(&i, i, __ATOMIC_RELEASE); - ], + ]])], [glibcxx_cv_libbacktrace_atomics=yes], [glibcxx_cv_libbacktrace_atomics=no])])
