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-rwxr-xr-xlibstdc++-v3/configure723
1 files changed, 210 insertions, 513 deletions
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 67d2b8c..69aa246 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -2731,63 +2731,6 @@ $as_echo "$ac_res" >&6; }
eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
} # ac_fn_c_check_decl
-
-# ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
-# ----------------------------------------------------
-# Tries to find if the field MEMBER exists in type AGGR, after including
-# INCLUDES, setting cache variable VAR accordingly.
-ac_fn_c_check_member ()
-{
- as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
-$as_echo_n "checking for $2.$3... " >&6; }
-if eval \${$4+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-$5
-int
-main ()
-{
-static $2 ac_aggr;
-if (ac_aggr.$3)
-return 0;
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
- eval "$4=yes"
-else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-$5
-int
-main ()
-{
-static $2 ac_aggr;
-if (sizeof ac_aggr.$3)
-return 0;
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
- eval "$4=yes"
-else
- eval "$4=no"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-eval ac_res=\$$4
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
- eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-
-} # ac_fn_c_check_member
cat >config.log <<_ACEOF
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
@@ -12337,7 +12280,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 12340 "configure"
+#line 12283 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -12443,7 +12386,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 12446 "configure"
+#line 12389 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -16046,7 +15989,7 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
old_CXXFLAGS="$CXXFLAGS"
- # Do link tests if possible, instead asm tests, limited to some platforms
+ # Do link tests if possible, otherwise asm tests. Limited to some platforms
# see discussion in PR target/40134, PR libstdc++/40133 and the thread
# starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
atomic_builtins_link_tests=no
@@ -16059,326 +16002,77 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
esac
fi
- if test x$atomic_builtins_link_tests = xyes; then
+ if test "$atomic_builtins_link_tests" = yes; then
- # Do link tests.
+ # Do link tests.
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
+ CXXFLAGS="$CXXFLAGS -fno-exceptions"
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for bool" >&5
-$as_echo_n "checking for atomic builtins for bool... " >&6; }
-if ${glibcxx_cv_atomic_bool+:} false; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for _Atomic_word" >&5
+$as_echo_n "checking for atomic builtins for _Atomic_word... " >&6; }
+if ${glibcxx_cv_atomic_word+:} false; then :
$as_echo_n "(cached) " >&6
else
-
- if test x$gcc_no_link = xyes; then
- as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
-fi
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-int
-main ()
-{
-typedef bool atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- // N.B. __atomic_fetch_add is not supported for bool.
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"; then :
- glibcxx_cv_atomic_bool=yes
-else
- glibcxx_cv_atomic_bool=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
- conftest$ac_exeext conftest.$ac_ext
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_bool" >&5
-$as_echo "$glibcxx_cv_atomic_bool" >&6; }
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for short" >&5
-$as_echo_n "checking for atomic builtins for short... " >&6; }
-if ${glibcxx_cv_atomic_short+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
- if test x$gcc_no_link = xyes; then
- as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
-fi
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-int
-main ()
-{
-typedef short atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"; then :
- glibcxx_cv_atomic_short=yes
-else
- glibcxx_cv_atomic_short=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
- conftest$ac_exeext conftest.$ac_ext
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_short" >&5
-$as_echo "$glibcxx_cv_atomic_short" >&6; }
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for int" >&5
-$as_echo_n "checking for atomic builtins for int... " >&6; }
-if ${glibcxx_cv_atomic_int+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
- if test x$gcc_no_link = xyes; then
- as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
-fi
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-int
-main ()
-{
-typedef int atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"; then :
- glibcxx_cv_atomic_int=yes
-else
- glibcxx_cv_atomic_int=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
- conftest$ac_exeext conftest.$ac_ext
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_int" >&5
-$as_echo "$glibcxx_cv_atomic_int" >&6; }
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for long long" >&5
-$as_echo_n "checking for atomic builtins for long long... " >&6; }
-if ${glibcxx_cv_atomic_long_long+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
- if test x$gcc_no_link = xyes; then
+ if test x$gcc_no_link = xyes; then
as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
fi
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-
+#include "${glibcxx_srcdir}/config/$atomic_word_dir/atomic_word.h"
int
main ()
{
-typedef long long atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
+_Atomic_word a = 0, b;
+ b = __atomic_fetch_add(&a, 1, __ATOMIC_ACQ_REL);
;
return 0;
}
_ACEOF
if ac_fn_cxx_try_link "$LINENO"; then :
- glibcxx_cv_atomic_long_long=yes
+ glibcxx_cv_atomic_word=yes
else
- glibcxx_cv_atomic_long_long=no
+ glibcxx_cv_atomic_word=no
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
-
fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_long_long" >&5
-$as_echo "$glibcxx_cv_atomic_long_long" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_word" >&5
+$as_echo "$glibcxx_cv_atomic_word" >&6; }
else
+ # Do asm tests.
- # Do asm tests.
-
- # Compile unoptimized.
- CXXFLAGS='-O0 -S'
-
- # Fake what AC_TRY_COMPILE does.
-
- cat > conftest.$ac_ext << EOF
-#line 16242 "configure"
-int main()
-{
- typedef bool atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- // N.B. __atomic_fetch_add is not supported for bool.
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- return 0;
-}
-EOF
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for bool" >&5
-$as_echo_n "checking for atomic builtins for bool... " >&6; }
- if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
- (eval $ac_compile) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; then
- if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_bool=no
- else
- glibcxx_cv_atomic_bool=yes
- fi
- fi
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_bool" >&5
-$as_echo "$glibcxx_cv_atomic_bool" >&6; }
- rm -f conftest*
-
- cat > conftest.$ac_ext << EOF
-#line 16277 "configure"
-int main()
-{
- typedef short atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- return 0;
-}
-EOF
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for short" >&5
-$as_echo_n "checking for atomic builtins for short... " >&6; }
- if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
- (eval $ac_compile) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; then
- if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_short=no
- else
- glibcxx_cv_atomic_short=yes
- fi
- fi
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_short" >&5
-$as_echo "$glibcxx_cv_atomic_short" >&6; }
- rm -f conftest*
+ # Compile unoptimized.
+ CXXFLAGS='-O0 -S'
- cat > conftest.$ac_ext << EOF
-#line 16312 "configure"
-int main()
-{
- // NB: _Atomic_word not necessarily int.
- typedef int atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- return 0;
-}
-EOF
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for int" >&5
-$as_echo_n "checking for atomic builtins for int... " >&6; }
- if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
- (eval $ac_compile) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; then
- if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_int=no
- else
- glibcxx_cv_atomic_int=yes
- fi
- fi
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_int" >&5
-$as_echo "$glibcxx_cv_atomic_int" >&6; }
- rm -f conftest*
+ # Fake what AC_TRY_COMPILE does.
cat > conftest.$ac_ext << EOF
-#line 16348 "configure"
+#line 16051 "configure"
+#include "${glibcxx_srcdir}/config/$atomic_word_dir/atomic_word.h"
int main()
{
- typedef long long atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- return 0;
+ _Atomic_word a = 0, b;
+ b = __atomic_fetch_add(&a, 1, __ATOMIC_ACQ_REL);
}
EOF
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for long long" >&5
-$as_echo_n "checking for atomic builtins for long long... " >&6; }
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for _Atomic_word" >&5
+$as_echo_n "checking for atomic builtins for _Atomic_word... " >&6; }
if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
(eval $ac_compile) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; then
if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_long_long=no
+ glibcxx_cv_atomic_word=no
else
- glibcxx_cv_atomic_long_long=yes
+ glibcxx_cv_atomic_word=yes
fi
fi
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_long_long" >&5
-$as_echo "$glibcxx_cv_atomic_long_long" >&6; }
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_word" >&5
+$as_echo "$glibcxx_cv_atomic_word" >&6; }
rm -f conftest*
-
fi
CXXFLAGS="$old_CXXFLAGS"
@@ -16389,14 +16083,12 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
ac_compiler_gnu=$ac_cv_c_compiler_gnu
- # Set atomicity_dir to builtins if all but the long long test above passes,
+ # Set atomicity_dir to builtins if the test above passes,
# or if the builtins were already chosen (e.g. by configure.host).
- if { test "$glibcxx_cv_atomic_bool" = yes \
- && test "$glibcxx_cv_atomic_short" = yes \
- && test "$glibcxx_cv_atomic_int" = yes; } \
+ if test "$glibcxx_cv_atomic_word" = yes \
|| test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
-$as_echo "#define _GLIBCXX_ATOMIC_BUILTINS 1" >>confdefs.h
+$as_echo "#define _GLIBCXX_ATOMIC_WORD_BUILTINS 1" >>confdefs.h
atomicity_dir=cpu/generic/atomicity_builtins
fi
@@ -16451,10 +16143,11 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
- #if defined __riscv
+ #if defined __AMDGCN__ || defined __nvptx__
+ /* Yes, please. */
+ #elif defined __riscv
# error "Defaulting to mutex-based locks for ABI compatibility"
- #endif
- #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
+ #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
# error "No 2-byte compare-and-swap"
#elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
# error "No 4-byte compare-and-swap"
@@ -16501,7 +16194,7 @@ $as_echo "mutex" >&6; }
# unnecessary for this test.
cat > conftest.$ac_ext << EOF
-#line 16504 "configure"
+#line 16197 "configure"
int main()
{
_Decimal32 d1;
@@ -16543,7 +16236,7 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
# unnecessary for this test.
cat > conftest.$ac_ext << EOF
-#line 16546 "configure"
+#line 16239 "configure"
template<typename T1, typename T2>
struct same
{ typedef T2 type; };
@@ -52297,64 +51990,6 @@ fi
fi
fi
- ac_fn_cxx_check_header_mongrel "$LINENO" "semaphore.h" "ac_cv_header_semaphore_h" "$ac_includes_default"
-if test "x$ac_cv_header_semaphore_h" = xyes; then :
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for POSIX Semaphores and sem_timedwait" >&5
-$as_echo_n "checking for POSIX Semaphores and sem_timedwait... " >&6; }
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
- #include <unistd.h>
- #include <semaphore.h>
- #include <limits.h>
-
-int
-main ()
-{
-
- #if !defined _POSIX_TIMEOUTS || _POSIX_TIMEOUTS <= 0
- # error "POSIX Timeouts option not supported"
- #elif !defined _POSIX_SEMAPHORES || _POSIX_SEMAPHORES <= 0
- # error "POSIX Semaphores option not supported"
- #else
- #if defined SEM_VALUE_MAX
- constexpr int sem_value_max = SEM_VALUE_MAX;
- #elif defined _POSIX_SEM_VALUE_MAX
- constexpr int sem_value_max = _POSIX_SEM_VALUE_MAX;
- #else
- # error "SEM_VALUE_MAX not available"
- #endif
- sem_t sem;
- sem_init(&sem, 0, sem_value_max);
- struct timespec ts = { 0 };
- sem_timedwait(&sem, &ts);
- #endif
-
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_compile "$LINENO"; then :
- ac_have_posix_semaphore=yes
-else
- ac_have_posix_semaphore=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-else
- ac_have_posix_semaphore=no
-fi
-
-
-
- if test $ac_have_posix_semaphore = yes ; then
-
-$as_echo "#define HAVE_POSIX_SEMAPHORE 1" >>confdefs.h
-
- fi
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_have_posix_semaphore" >&5
-$as_echo "$ac_have_posix_semaphore" >&6; }
-
CXXFLAGS="$ac_save_CXXFLAGS"
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
@@ -53844,8 +53479,117 @@ fi
BACKTRACE_CPPFLAGS="-D_GNU_SOURCE"
- # libbacktrace only needs atomics for int, which we've already tested
- if test "$glibcxx_cv_atomic_int" = "yes"; then
+ ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+ old_CXXFLAGS="$CXXFLAGS"
+
+ # libbacktrace's own configure.ac only tests atomics for int,
+ # but the code actually uses atomics for size_t and pointers as well.
+ if test "$atomic_builtins_link_tests" = yes; then
+
+ CXXFLAGS='-O0'
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for libbacktrace" >&5
+$as_echo_n "checking for atomic builtins for libbacktrace... " >&6; }
+if ${glibcxx_cv_libbacktrace_atomics+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test x$gcc_no_link = xyes; then
+ as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+fi
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ int i = 0;
+ int* p = &i;
+ __SIZE_TYPE__ s = 0;
+ // backtrace_atomic_load_pointer
+ void* vp = __atomic_load_n(&p, __ATOMIC_ACQUIRE);
+ // backtrace_atomic_load_int
+ int i2 = __atomic_load_n(&i, __ATOMIC_ACQUIRE);
+ // backtrace_atomic_store_pointer
+ __atomic_store_n(&p, &i, __ATOMIC_RELEASE);
+ // backtrace_atomic_store_size_t
+ __atomic_store_n(&s, s, __ATOMIC_RELEASE);
+ // backtrace_atomic_store_int
+ __atomic_store_n(&i, i, __ATOMIC_RELEASE);
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_link "$LINENO"; then :
+ glibcxx_cv_libbacktrace_atomics=yes
+else
+ glibcxx_cv_libbacktrace_atomics=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_libbacktrace_atomics" >&5
+$as_echo "$glibcxx_cv_libbacktrace_atomics" >&6; }
+
+ else
+ # Do asm tests.
+
+ CXXFLAGS='-O0 -S'
+
+ cat > conftest.$ac_ext << EOF
+#line 53546 "configure"
+#include <stddef.h>
+int main()
+{
+ int i = 0;
+ int* p = &i;
+ __SIZE_TYPE__ s = 0;
+ // backtrace_atomic_load_pointer
+ void* vp = __atomic_load_n(&p, __ATOMIC_ACQUIRE);
+ // backtrace_atomic_load_int
+ int i2 = __atomic_load_n(&i, __ATOMIC_ACQUIRE);
+ // backtrace_atomic_store_pointer
+ __atomic_store_n(&p, &i, __ATOMIC_RELEASE);
+ // backtrace_atomic_store_size_t
+ __atomic_store_n(&s, s, __ATOMIC_RELEASE);
+ // backtrace_atomic_store_int
+ __atomic_store_n(&i, i, __ATOMIC_RELEASE);
+}
+EOF
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for libbacktrace" >&5
+$as_echo_n "checking for atomic builtins for libbacktrace... " >&6; }
+ if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; then
+ if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
+ glibcxx_cv_libbacktrace_atomics=no
+ else
+ glibcxx_cv_libbacktrace_atomics=yes
+ fi
+ fi
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_libbacktrace_atomics" >&5
+$as_echo "$glibcxx_cv_libbacktrace_atomics" >&6; }
+ rm -f conftest*
+ fi
+
+ CXXFLAGS="$old_CXXFLAGS"
+ ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+ if test "$glibcxx_cv_libbacktrace_atomics" = yes; then
BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_ATOMIC_FUNCTIONS=1"
fi
@@ -54482,6 +54226,65 @@ _ACEOF
fi
+# For std::chrono formatters to use tm::tm_zone
+
+
+
+ ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+ ac_save_CXXFLAGS="$CXXFLAGS"
+ CXXFLAGS="$CXXFLAGS -std=c++20"
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tm_zone member of struct tm" >&5
+$as_echo_n "checking for tm_zone member of struct tm... " >&6; }
+if ${glibcxx_cv_tm_zone+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#include <time.h>
+
+int
+main ()
+{
+struct tm t{}; t.tm_zone = (char*)0;
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+ glibcxx_cv_tm_zone=yes
+else
+ glibcxx_cv_tm_zone=no
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_tm_zone" >&5
+$as_echo "$glibcxx_cv_tm_zone" >&6; }
+
+ if test $glibcxx_cv_tm_zone = yes; then
+
+$as_echo "#define _GLIBCXX_USE_STRUCT_TM_TM_ZONE 1" >>confdefs.h
+
+ fi
+
+ CXXFLAGS="$ac_save_CXXFLAGS"
+ ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
# For src/c++11/shared_ptr.cc alignment.
@@ -54697,112 +54500,6 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether struct tm is in sys/time.h or time.h" >&5
-$as_echo_n "checking whether struct tm is in sys/time.h or time.h... " >&6; }
-if ${ac_cv_struct_tm+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-#include <sys/types.h>
-#include <time.h>
-
-int
-main ()
-{
-struct tm tm;
- int *p = &tm.tm_sec;
- return !p;
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
- ac_cv_struct_tm=time.h
-else
- ac_cv_struct_tm=sys/time.h
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_struct_tm" >&5
-$as_echo "$ac_cv_struct_tm" >&6; }
-if test $ac_cv_struct_tm = sys/time.h; then
-
-$as_echo "#define TM_IN_SYS_TIME 1" >>confdefs.h
-
-fi
-
-ac_fn_c_check_member "$LINENO" "struct tm" "tm_zone" "ac_cv_member_struct_tm_tm_zone" "#include <sys/types.h>
-#include <$ac_cv_struct_tm>
-
-"
-if test "x$ac_cv_member_struct_tm_tm_zone" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_TM_TM_ZONE 1
-_ACEOF
-
-
-fi
-
-if test "$ac_cv_member_struct_tm_tm_zone" = yes; then
-
-$as_echo "#define HAVE_TM_ZONE 1" >>confdefs.h
-
-else
- ac_fn_c_check_decl "$LINENO" "tzname" "ac_cv_have_decl_tzname" "#include <time.h>
-"
-if test "x$ac_cv_have_decl_tzname" = xyes; then :
- ac_have_decl=1
-else
- ac_have_decl=0
-fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_TZNAME $ac_have_decl
-_ACEOF
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tzname" >&5
-$as_echo_n "checking for tzname... " >&6; }
-if ${ac_cv_var_tzname+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- if test x$gcc_no_link = xyes; then
- as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
-fi
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-#include <time.h>
-#if !HAVE_DECL_TZNAME
-extern char *tzname[];
-#endif
-
-int
-main ()
-{
-return tzname[0][0];
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
- ac_cv_var_tzname=yes
-else
- ac_cv_var_tzname=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
- conftest$ac_exeext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_var_tzname" >&5
-$as_echo "$ac_cv_var_tzname" >&6; }
- if test $ac_cv_var_tzname = yes; then
-
-$as_echo "#define HAVE_TZNAME 1" >>confdefs.h
-
- fi
-fi
-
-
# Define documentation rules conditionally.
# See if makeinfo has been installed and is modern enough
generated by cgit v1.1 at 2025-07-15 22:00:35 +0000