On Wed, Jun 24, 2026 at 7:35 PM Pietro Monteiro <[email protected]> wrote: > > 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.
Ok. > > Signed-off-by: Pietro Monteiro <[email protected]> > --- > 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 6a06464d041..7afd6a50c96 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])]) > > -- > 2.43.0 >
