fi
])
+dnl
+dnl Check for a tm_zone member in struct tm.
+dnl
+dnl This member is defined as const char* in Glibc, newlib, POSIX.1-2024,
+dnl and as char* in BSD (including macOS).
+dnl
+dnl Defines:
+dnl _GLIBCXX_USE_STRUCT_TM_TM_ZONE if struct tm has a tm_zone member.
+dnl
+AC_DEFUN([GLIBCXX_STRUCT_TM_TM_ZONE], [
+
+ AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ ac_save_CXXFLAGS="$CXXFLAGS"
+ CXXFLAGS="$CXXFLAGS -std=c++20"
+
+ AC_CACHE_CHECK([for tm_zone member of struct tm], glibcxx_cv_tm_zone, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <time.h>
+ ],
+ [struct tm t{}; t.tm_zone = (char*)0;]
+ )],
+ [glibcxx_cv_tm_zone=yes],
+ [glibcxx_cv_tm_zone=no]
+ )
+ ])
+
+ if test $glibcxx_cv_tm_zone = yes; then
+ AC_DEFINE(_GLIBCXX_USE_STRUCT_TM_TM_ZONE, 1,
+ [Define if struct tm has a tm_zone member.])
+ fi
+
+ CXXFLAGS="$ac_save_CXXFLAGS"
+ AC_LANG_RESTORE
+])
+
dnl
dnl Check whether lock tables can be aligned to avoid false sharing.
dnl
don't. */
#undef HAVE_DECL_STRNLEN
-/* Define to 1 if you have the declaration of `tzname', and to 0 if you don't.
- */
-#undef HAVE_DECL_TZNAME
-
/* Define to 1 if you have the <dirent.h> header file. */
#undef HAVE_DIRENT_H
/* Define to 1 if `d_type' is a member of `struct dirent'. */
#undef HAVE_STRUCT_DIRENT_D_TYPE
-/* Define to 1 if `tm_zone' is a member of `struct tm'. */
-#undef HAVE_STRUCT_TM_TM_ZONE
-
/* Define if strxfrm_l is available in <string.h>. */
#undef HAVE_STRXFRM_L
/* Define to 1 if the target supports thread-local storage. */
#undef HAVE_TLS
-/* Define to 1 if your `struct tm' has `tm_zone'. Deprecated, use
- `HAVE_STRUCT_TM_TM_ZONE' instead. */
-#undef HAVE_TM_ZONE
-
/* Define if truncate is available in <unistd.h>. */
#undef HAVE_TRUNCATE
-/* Define to 1 if you don't have `tm_zone' but do have the external array
- `tzname'. */
-#undef HAVE_TZNAME
-
/* Define to 1 if you have the <uchar.h> header file. */
#undef HAVE_UCHAR_H
/* Define to 1 if you have the ANSI C header files. */
#undef STDC_HEADERS
-/* Define to 1 if your <sys/time.h> declares `struct tm'. */
-#undef TM_IN_SYS_TIME
-
/* Version number of package */
#undef VERSION
/* Define to restrict std::__basic_file<> to stdio APIs. */
#undef _GLIBCXX_USE_STDIO_PURE
+/* Define if struct tm has a tm_zone member. */
+#undef _GLIBCXX_USE_STRUCT_TM_TM_ZONE
+
/* Define if struct stat has timespec members. */
#undef _GLIBCXX_USE_ST_MTIM
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; ${as_lineno_stack:+:} unset as_lineno
-
-} # ac_fn_c_check_member
cat >config.log <<_ACEOF
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 12340 "configure"
+#line 12283 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 12446 "configure"
+#line 12389 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
# Fake what AC_TRY_COMPILE does.
cat > conftest.$ac_ext << EOF
-#line 16242 "configure"
+#line 16185 "configure"
int main()
{
typedef bool atomic_type;
rm -f conftest*
cat > conftest.$ac_ext << EOF
-#line 16277 "configure"
+#line 16220 "configure"
int main()
{
typedef short atomic_type;
rm -f conftest*
cat > conftest.$ac_ext << EOF
-#line 16312 "configure"
+#line 16255 "configure"
int main()
{
// NB: _Atomic_word not necessarily int.
rm -f conftest*
cat > conftest.$ac_ext << EOF
-#line 16348 "configure"
+#line 16291 "configure"
int main()
{
typedef long long atomic_type;
# unnecessary for this test.
cat > conftest.$ac_ext << EOF
-#line 16504 "configure"
+#line 16447 "configure"
int main()
{
_Decimal32 d1;
# unnecessary for this test.
cat > conftest.$ac_ext << EOF
-#line 16546 "configure"
+#line 16489 "configure"
template<typename T1, typename T2>
struct same
{ typedef T2 type; };
fi
+# For std::chrono formatters to use tm::tm_zone
+
+
+
+ ac_ext=cpp
+ac_cpp='$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.
-{ $as_echo "$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
projects / thirdparty / gcc.git / commitdiff
