mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-15 08:20:16 +08:00
b779168ffe
This eliminates gobs of "unrecognized format function type" warnings under MinGW compilers predating GCC 4.4.
422 lines
15 KiB
Plaintext
422 lines
15 KiB
Plaintext
# Macros to detect C compiler features
|
|
# config/c-compiler.m4
|
|
|
|
|
|
# PGAC_C_SIGNED
|
|
# -------------
|
|
# Check if the C compiler understands signed types.
|
|
AC_DEFUN([PGAC_C_SIGNED],
|
|
[AC_CACHE_CHECK(for signed types, pgac_cv_c_signed,
|
|
[AC_TRY_COMPILE([],
|
|
[signed char c; signed short s; signed int i;],
|
|
[pgac_cv_c_signed=yes],
|
|
[pgac_cv_c_signed=no])])
|
|
if test x"$pgac_cv_c_signed" = xno ; then
|
|
AC_DEFINE(signed,, [Define to empty if the C compiler does not understand signed types.])
|
|
fi])# PGAC_C_SIGNED
|
|
|
|
|
|
|
|
# PGAC_C_INLINE
|
|
# -------------
|
|
# Check if the C compiler understands inline functions without being
|
|
# noisy about unused static inline functions. Some older compilers
|
|
# understand inline functions (as tested by AC_C_INLINE) but warn about
|
|
# them if they aren't used in a translation unit.
|
|
#
|
|
# This test used to just define an inline function, but some compilers
|
|
# (notably clang) got too smart and now warn about unused static
|
|
# inline functions when defined inside a .c file, but not when defined
|
|
# in an included header. Since the latter is what we want to use, test
|
|
# to see if the warning appears when the function is in a header file.
|
|
# Not pretty, but it works.
|
|
#
|
|
# Defines: inline, PG_USE_INLINE
|
|
AC_DEFUN([PGAC_C_INLINE],
|
|
[AC_C_INLINE
|
|
AC_CACHE_CHECK([for quiet inline (no complaint if unreferenced)], pgac_cv_c_inline_quietly,
|
|
[pgac_cv_c_inline_quietly=no
|
|
if test "$ac_cv_c_inline" != no; then
|
|
pgac_c_inline_save_werror=$ac_c_werror_flag
|
|
ac_c_werror_flag=yes
|
|
AC_LINK_IFELSE([AC_LANG_PROGRAM([#include "$srcdir/config/test_quiet_include.h"],[])],
|
|
[pgac_cv_c_inline_quietly=yes])
|
|
ac_c_werror_flag=$pgac_c_inline_save_werror
|
|
fi])
|
|
if test "$pgac_cv_c_inline_quietly" != no; then
|
|
AC_DEFINE_UNQUOTED([PG_USE_INLINE], 1,
|
|
[Define to 1 if "static inline" works without unwanted warnings from ]
|
|
[compilations where static inline functions are defined but not called.])
|
|
fi
|
|
])# PGAC_C_INLINE
|
|
|
|
|
|
# PGAC_C_PRINTF_ARCHETYPE
|
|
# -----------------------
|
|
# Set the format archetype used by gcc to check printf type functions. We
|
|
# prefer "gnu_printf", which includes what glibc uses, such as %m for error
|
|
# strings and %lld for 64 bit long longs. GCC 4.4 introduced it. It makes a
|
|
# dramatic difference on Windows.
|
|
AC_DEFUN([PGAC_PRINTF_ARCHETYPE],
|
|
[AC_CACHE_CHECK([for printf format archetype], pgac_cv_printf_archetype,
|
|
[ac_save_c_werror_flag=$ac_c_werror_flag
|
|
ac_c_werror_flag=yes
|
|
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
|
|
[extern int
|
|
pgac_write(int ignore, const char *fmt,...)
|
|
__attribute__((format(gnu_printf, 2, 3)));], [])],
|
|
[pgac_cv_printf_archetype=gnu_printf],
|
|
[pgac_cv_printf_archetype=printf])
|
|
ac_c_werror_flag=$ac_save_c_werror_flag])
|
|
AC_DEFINE_UNQUOTED([PG_PRINTF_ATTRIBUTE], [$pgac_cv_printf_archetype],
|
|
[Define to gnu_printf if compiler supports it, else printf.])
|
|
])# PGAC_PRINTF_ARCHETYPE
|
|
|
|
|
|
# PGAC_TYPE_64BIT_INT(TYPE)
|
|
# -------------------------
|
|
# Check if TYPE is a working 64 bit integer type. Set HAVE_TYPE_64 to
|
|
# yes or no respectively, and define HAVE_TYPE_64 if yes.
|
|
AC_DEFUN([PGAC_TYPE_64BIT_INT],
|
|
[define([Ac_define], [translit([have_$1_64], [a-z *], [A-Z_P])])dnl
|
|
define([Ac_cachevar], [translit([pgac_cv_type_$1_64], [ *], [_p])])dnl
|
|
AC_CACHE_CHECK([whether $1 is 64 bits], [Ac_cachevar],
|
|
[AC_TRY_RUN(
|
|
[typedef $1 ac_int64;
|
|
|
|
/*
|
|
* These are globals to discourage the compiler from folding all the
|
|
* arithmetic tests down to compile-time constants.
|
|
*/
|
|
ac_int64 a = 20000001;
|
|
ac_int64 b = 40000005;
|
|
|
|
int does_int64_work()
|
|
{
|
|
ac_int64 c,d;
|
|
|
|
if (sizeof(ac_int64) != 8)
|
|
return 0; /* definitely not the right size */
|
|
|
|
/* Do perfunctory checks to see if 64-bit arithmetic seems to work */
|
|
c = a * b;
|
|
d = (c + b) / b;
|
|
if (d != a+1)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
main() {
|
|
exit(! does_int64_work());
|
|
}],
|
|
[Ac_cachevar=yes],
|
|
[Ac_cachevar=no],
|
|
[# If cross-compiling, check the size reported by the compiler and
|
|
# trust that the arithmetic works.
|
|
AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([], [sizeof($1) == 8])],
|
|
Ac_cachevar=yes,
|
|
Ac_cachevar=no)])])
|
|
|
|
Ac_define=$Ac_cachevar
|
|
if test x"$Ac_cachevar" = xyes ; then
|
|
AC_DEFINE(Ac_define, 1, [Define to 1 if `]$1[' works and is 64 bits.])
|
|
fi
|
|
undefine([Ac_define])dnl
|
|
undefine([Ac_cachevar])dnl
|
|
])# PGAC_TYPE_64BIT_INT
|
|
|
|
|
|
|
|
# PGAC_C_FUNCNAME_SUPPORT
|
|
# -----------------------
|
|
# Check if the C compiler understands __func__ (C99) or __FUNCTION__ (gcc).
|
|
# Define HAVE_FUNCNAME__FUNC or HAVE_FUNCNAME__FUNCTION accordingly.
|
|
AC_DEFUN([PGAC_C_FUNCNAME_SUPPORT],
|
|
[AC_CACHE_CHECK(for __func__, pgac_cv_funcname_func_support,
|
|
[AC_TRY_COMPILE([#include <stdio.h>],
|
|
[printf("%s\n", __func__);],
|
|
[pgac_cv_funcname_func_support=yes],
|
|
[pgac_cv_funcname_func_support=no])])
|
|
if test x"$pgac_cv_funcname_func_support" = xyes ; then
|
|
AC_DEFINE(HAVE_FUNCNAME__FUNC, 1,
|
|
[Define to 1 if your compiler understands __func__.])
|
|
else
|
|
AC_CACHE_CHECK(for __FUNCTION__, pgac_cv_funcname_function_support,
|
|
[AC_TRY_COMPILE([#include <stdio.h>],
|
|
[printf("%s\n", __FUNCTION__);],
|
|
[pgac_cv_funcname_function_support=yes],
|
|
[pgac_cv_funcname_function_support=no])])
|
|
if test x"$pgac_cv_funcname_function_support" = xyes ; then
|
|
AC_DEFINE(HAVE_FUNCNAME__FUNCTION, 1,
|
|
[Define to 1 if your compiler understands __FUNCTION__.])
|
|
fi
|
|
fi])# PGAC_C_FUNCNAME_SUPPORT
|
|
|
|
|
|
|
|
# PGAC_C_STATIC_ASSERT
|
|
# --------------------
|
|
# Check if the C compiler understands _Static_assert(),
|
|
# and define HAVE__STATIC_ASSERT if so.
|
|
#
|
|
# We actually check the syntax ({ _Static_assert(...) }), because we need
|
|
# gcc-style compound expressions to be able to wrap the thing into macros.
|
|
AC_DEFUN([PGAC_C_STATIC_ASSERT],
|
|
[AC_CACHE_CHECK(for _Static_assert, pgac_cv__static_assert,
|
|
[AC_TRY_LINK([],
|
|
[({ _Static_assert(1, "foo"); })],
|
|
[pgac_cv__static_assert=yes],
|
|
[pgac_cv__static_assert=no])])
|
|
if test x"$pgac_cv__static_assert" = xyes ; then
|
|
AC_DEFINE(HAVE__STATIC_ASSERT, 1,
|
|
[Define to 1 if your compiler understands _Static_assert.])
|
|
fi])# PGAC_C_STATIC_ASSERT
|
|
|
|
|
|
|
|
# PGAC_C_TYPES_COMPATIBLE
|
|
# -----------------------
|
|
# Check if the C compiler understands __builtin_types_compatible_p,
|
|
# and define HAVE__BUILTIN_TYPES_COMPATIBLE_P if so.
|
|
#
|
|
# We check usage with __typeof__, though it's unlikely any compiler would
|
|
# have the former and not the latter.
|
|
AC_DEFUN([PGAC_C_TYPES_COMPATIBLE],
|
|
[AC_CACHE_CHECK(for __builtin_types_compatible_p, pgac_cv__types_compatible,
|
|
[AC_TRY_COMPILE([],
|
|
[ int x; static int y[__builtin_types_compatible_p(__typeof__(x), int)]; ],
|
|
[pgac_cv__types_compatible=yes],
|
|
[pgac_cv__types_compatible=no])])
|
|
if test x"$pgac_cv__types_compatible" = xyes ; then
|
|
AC_DEFINE(HAVE__BUILTIN_TYPES_COMPATIBLE_P, 1,
|
|
[Define to 1 if your compiler understands __builtin_types_compatible_p.])
|
|
fi])# PGAC_C_TYPES_COMPATIBLE
|
|
|
|
|
|
|
|
# PGAC_C_BUILTIN_CONSTANT_P
|
|
# -------------------------
|
|
# Check if the C compiler understands __builtin_constant_p(),
|
|
# and define HAVE__BUILTIN_CONSTANT_P if so.
|
|
AC_DEFUN([PGAC_C_BUILTIN_CONSTANT_P],
|
|
[AC_CACHE_CHECK(for __builtin_constant_p, pgac_cv__builtin_constant_p,
|
|
[AC_TRY_COMPILE([static int x; static int y[__builtin_constant_p(x) ? x : 1];],
|
|
[],
|
|
[pgac_cv__builtin_constant_p=yes],
|
|
[pgac_cv__builtin_constant_p=no])])
|
|
if test x"$pgac_cv__builtin_constant_p" = xyes ; then
|
|
AC_DEFINE(HAVE__BUILTIN_CONSTANT_P, 1,
|
|
[Define to 1 if your compiler understands __builtin_constant_p.])
|
|
fi])# PGAC_C_BUILTIN_CONSTANT_P
|
|
|
|
|
|
|
|
# PGAC_C_BUILTIN_UNREACHABLE
|
|
# --------------------------
|
|
# Check if the C compiler understands __builtin_unreachable(),
|
|
# and define HAVE__BUILTIN_UNREACHABLE if so.
|
|
#
|
|
# NB: Don't get the idea of putting a for(;;); or such before the
|
|
# __builtin_unreachable() call. Some compilers would remove it before linking
|
|
# and only a warning instead of an error would be produced.
|
|
AC_DEFUN([PGAC_C_BUILTIN_UNREACHABLE],
|
|
[AC_CACHE_CHECK(for __builtin_unreachable, pgac_cv__builtin_unreachable,
|
|
[AC_TRY_LINK([],
|
|
[__builtin_unreachable();],
|
|
[pgac_cv__builtin_unreachable=yes],
|
|
[pgac_cv__builtin_unreachable=no])])
|
|
if test x"$pgac_cv__builtin_unreachable" = xyes ; then
|
|
AC_DEFINE(HAVE__BUILTIN_UNREACHABLE, 1,
|
|
[Define to 1 if your compiler understands __builtin_unreachable.])
|
|
fi])# PGAC_C_BUILTIN_UNREACHABLE
|
|
|
|
|
|
|
|
# PGAC_C_VA_ARGS
|
|
# --------------
|
|
# Check if the C compiler understands C99-style variadic macros,
|
|
# and define HAVE__VA_ARGS if so.
|
|
AC_DEFUN([PGAC_C_VA_ARGS],
|
|
[AC_CACHE_CHECK(for __VA_ARGS__, pgac_cv__va_args,
|
|
[AC_TRY_COMPILE([#include <stdio.h>],
|
|
[#define debug(...) fprintf(stderr, __VA_ARGS__)
|
|
debug("%s", "blarg");
|
|
],
|
|
[pgac_cv__va_args=yes],
|
|
[pgac_cv__va_args=no])])
|
|
if test x"$pgac_cv__va_args" = xyes ; then
|
|
AC_DEFINE(HAVE__VA_ARGS, 1,
|
|
[Define to 1 if your compiler understands __VA_ARGS__ in macros.])
|
|
fi])# PGAC_C_VA_ARGS
|
|
|
|
|
|
|
|
# PGAC_PROG_CC_CFLAGS_OPT
|
|
# -----------------------
|
|
# Given a string, check if the compiler supports the string as a
|
|
# command-line option. If it does, add the string to CFLAGS.
|
|
AC_DEFUN([PGAC_PROG_CC_CFLAGS_OPT],
|
|
[define([Ac_cachevar], [AS_TR_SH([pgac_cv_prog_cc_cflags_$1])])dnl
|
|
AC_CACHE_CHECK([whether $CC supports $1], [Ac_cachevar],
|
|
[pgac_save_CFLAGS=$CFLAGS
|
|
CFLAGS="$pgac_save_CFLAGS $1"
|
|
ac_save_c_werror_flag=$ac_c_werror_flag
|
|
ac_c_werror_flag=yes
|
|
_AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
|
|
[Ac_cachevar=yes],
|
|
[Ac_cachevar=no])
|
|
ac_c_werror_flag=$ac_save_c_werror_flag
|
|
CFLAGS="$pgac_save_CFLAGS"])
|
|
if test x"$Ac_cachevar" = x"yes"; then
|
|
CFLAGS="$CFLAGS $1"
|
|
fi
|
|
undefine([Ac_cachevar])dnl
|
|
])# PGAC_PROG_CC_CFLAGS_OPT
|
|
|
|
|
|
|
|
# PGAC_PROG_CC_VAR_OPT
|
|
# -----------------------
|
|
# Given a variable name and a string, check if the compiler supports
|
|
# the string as a command-line option. If it does, add the string to
|
|
# the given variable.
|
|
AC_DEFUN([PGAC_PROG_CC_VAR_OPT],
|
|
[define([Ac_cachevar], [AS_TR_SH([pgac_cv_prog_cc_cflags_$2])])dnl
|
|
AC_CACHE_CHECK([whether $CC supports $2], [Ac_cachevar],
|
|
[pgac_save_CFLAGS=$CFLAGS
|
|
CFLAGS="$pgac_save_CFLAGS $2"
|
|
ac_save_c_werror_flag=$ac_c_werror_flag
|
|
ac_c_werror_flag=yes
|
|
_AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
|
|
[Ac_cachevar=yes],
|
|
[Ac_cachevar=no])
|
|
ac_c_werror_flag=$ac_save_c_werror_flag
|
|
CFLAGS="$pgac_save_CFLAGS"])
|
|
if test x"$Ac_cachevar" = x"yes"; then
|
|
$1="${$1} $2"
|
|
fi
|
|
undefine([Ac_cachevar])dnl
|
|
])# PGAC_PROG_CC_CFLAGS_OPT
|
|
|
|
|
|
|
|
# PGAC_PROG_CC_LDFLAGS_OPT
|
|
# ------------------------
|
|
# Given a string, check if the compiler supports the string as a
|
|
# command-line option. If it does, add the string to LDFLAGS.
|
|
# For reasons you'd really rather not know about, this checks whether
|
|
# you can link to a particular function, not just whether you can link.
|
|
# In fact, we must actually check that the resulting program runs :-(
|
|
AC_DEFUN([PGAC_PROG_CC_LDFLAGS_OPT],
|
|
[define([Ac_cachevar], [AS_TR_SH([pgac_cv_prog_cc_ldflags_$1])])dnl
|
|
AC_CACHE_CHECK([whether $CC supports $1], [Ac_cachevar],
|
|
[pgac_save_LDFLAGS=$LDFLAGS
|
|
LDFLAGS="$pgac_save_LDFLAGS $1"
|
|
AC_RUN_IFELSE([AC_LANG_PROGRAM([extern void $2 (); void (*fptr) () = $2;],[])],
|
|
[Ac_cachevar=yes],
|
|
[Ac_cachevar=no],
|
|
[Ac_cachevar="assuming no"])
|
|
LDFLAGS="$pgac_save_LDFLAGS"])
|
|
if test x"$Ac_cachevar" = x"yes"; then
|
|
LDFLAGS="$LDFLAGS $1"
|
|
fi
|
|
undefine([Ac_cachevar])dnl
|
|
])# PGAC_PROG_CC_LDFLAGS_OPT
|
|
|
|
# PGAC_HAVE_GCC__SYNC_CHAR_TAS
|
|
# -------------------------
|
|
# Check if the C compiler understands __sync_lock_test_and_set(char),
|
|
# and define HAVE_GCC__SYNC_CHAR_TAS
|
|
#
|
|
# NB: There are platforms where test_and_set is available but compare_and_swap
|
|
# is not, so test this separately.
|
|
# NB: Some platforms only do 32bit tas, others only do 8bit tas. Test both.
|
|
AC_DEFUN([PGAC_HAVE_GCC__SYNC_CHAR_TAS],
|
|
[AC_CACHE_CHECK(for builtin __sync char locking functions, pgac_cv_gcc_sync_char_tas,
|
|
[AC_TRY_LINK([],
|
|
[char lock = 0;
|
|
__sync_lock_test_and_set(&lock, 1);
|
|
__sync_lock_release(&lock);],
|
|
[pgac_cv_gcc_sync_char_tas="yes"],
|
|
[pgac_cv_gcc_sync_char_tas="no"])])
|
|
if test x"$pgac_cv_gcc_sync_char_tas" = x"yes"; then
|
|
AC_DEFINE(HAVE_GCC__SYNC_CHAR_TAS, 1, [Define to 1 if you have __sync_lock_test_and_set(char *) and friends.])
|
|
fi])# PGAC_HAVE_GCC__SYNC_CHAR_TAS
|
|
|
|
# PGAC_HAVE_GCC__SYNC_INT32_TAS
|
|
# -------------------------
|
|
# Check if the C compiler understands __sync_lock_test_and_set(),
|
|
# and define HAVE_GCC__SYNC_INT32_TAS
|
|
AC_DEFUN([PGAC_HAVE_GCC__SYNC_INT32_TAS],
|
|
[AC_CACHE_CHECK(for builtin __sync int32 locking functions, pgac_cv_gcc_sync_int32_tas,
|
|
[AC_TRY_LINK([],
|
|
[int lock = 0;
|
|
__sync_lock_test_and_set(&lock, 1);
|
|
__sync_lock_release(&lock);],
|
|
[pgac_cv_gcc_sync_int32_tas="yes"],
|
|
[pgac_cv_gcc_sync_int32_tas="no"])])
|
|
if test x"$pgac_cv_gcc_sync_int32_tas" = x"yes"; then
|
|
AC_DEFINE(HAVE_GCC__SYNC_INT32_TAS, 1, [Define to 1 if you have __sync_lock_test_and_set(int *) and friends.])
|
|
fi])# PGAC_HAVE_GCC__SYNC_INT32_TAS
|
|
|
|
# PGAC_HAVE_GCC__SYNC_INT32_CAS
|
|
# -------------------------
|
|
# Check if the C compiler understands __sync_compare_and_swap() for 32bit
|
|
# types, and define HAVE_GCC__SYNC_INT32_CAS if so.
|
|
AC_DEFUN([PGAC_HAVE_GCC__SYNC_INT32_CAS],
|
|
[AC_CACHE_CHECK(for builtin __sync int32 atomic operations, pgac_cv_gcc_sync_int32_cas,
|
|
[AC_TRY_LINK([],
|
|
[int val = 0;
|
|
__sync_val_compare_and_swap(&val, 0, 37);],
|
|
[pgac_cv_gcc_sync_int32_cas="yes"],
|
|
[pgac_cv_gcc_sync_int32_cas="no"])])
|
|
if test x"$pgac_cv_gcc_sync_int32_cas" = x"yes"; then
|
|
AC_DEFINE(HAVE_GCC__SYNC_INT32_CAS, 1, [Define to 1 if you have __sync_compare_and_swap(int *, int, int).])
|
|
fi])# PGAC_HAVE_GCC__SYNC_INT32_CAS
|
|
|
|
# PGAC_HAVE_GCC__SYNC_INT64_CAS
|
|
# -------------------------
|
|
# Check if the C compiler understands __sync_compare_and_swap() for 64bit
|
|
# types, and define HAVE_GCC__SYNC_INT64_CAS if so.
|
|
AC_DEFUN([PGAC_HAVE_GCC__SYNC_INT64_CAS],
|
|
[AC_CACHE_CHECK(for builtin __sync int64 atomic operations, pgac_cv_gcc_sync_int64_cas,
|
|
[AC_TRY_LINK([],
|
|
[PG_INT64_TYPE lock = 0;
|
|
__sync_val_compare_and_swap(&lock, 0, (PG_INT64_TYPE) 37);],
|
|
[pgac_cv_gcc_sync_int64_cas="yes"],
|
|
[pgac_cv_gcc_sync_int64_cas="no"])])
|
|
if test x"$pgac_cv_gcc_sync_int64_cas" = x"yes"; then
|
|
AC_DEFINE(HAVE_GCC__SYNC_INT64_CAS, 1, [Define to 1 if you have __sync_compare_and_swap(int64 *, int64, int64).])
|
|
fi])# PGAC_HAVE_GCC__SYNC_INT64_CAS
|
|
|
|
# PGAC_HAVE_GCC__ATOMIC_INT32_CAS
|
|
# -------------------------
|
|
# Check if the C compiler understands __atomic_compare_exchange_n() for 32bit
|
|
# types, and define HAVE_GCC__ATOMIC_INT32_CAS if so.
|
|
AC_DEFUN([PGAC_HAVE_GCC__ATOMIC_INT32_CAS],
|
|
[AC_CACHE_CHECK(for builtin __atomic int32 atomic operations, pgac_cv_gcc_atomic_int32_cas,
|
|
[AC_TRY_LINK([],
|
|
[int val = 0;
|
|
int expect = 0;
|
|
__atomic_compare_exchange_n(&val, &expect, 37, 0, __ATOMIC_SEQ_CST, __ATOMIC_RELAXED);],
|
|
[pgac_cv_gcc_atomic_int32_cas="yes"],
|
|
[pgac_cv_gcc_atomic_int32_cas="no"])])
|
|
if test x"$pgac_cv_gcc_atomic_int32_cas" = x"yes"; then
|
|
AC_DEFINE(HAVE_GCC__ATOMIC_INT32_CAS, 1, [Define to 1 if you have __atomic_compare_exchange_n(int *, int *, int).])
|
|
fi])# PGAC_HAVE_GCC__ATOMIC_INT32_CAS
|
|
|
|
# PGAC_HAVE_GCC__ATOMIC_INT64_CAS
|
|
# -------------------------
|
|
# Check if the C compiler understands __atomic_compare_exchange_n() for 64bit
|
|
# types, and define HAVE_GCC__ATOMIC_INT64_CAS if so.
|
|
AC_DEFUN([PGAC_HAVE_GCC__ATOMIC_INT64_CAS],
|
|
[AC_CACHE_CHECK(for builtin __atomic int64 atomic operations, pgac_cv_gcc_atomic_int64_cas,
|
|
[AC_TRY_LINK([],
|
|
[PG_INT64_TYPE val = 0;
|
|
PG_INT64_TYPE expect = 0;
|
|
__atomic_compare_exchange_n(&val, &expect, 37, 0, __ATOMIC_SEQ_CST, __ATOMIC_RELAXED);],
|
|
[pgac_cv_gcc_atomic_int64_cas="yes"],
|
|
[pgac_cv_gcc_atomic_int64_cas="no"])])
|
|
if test x"$pgac_cv_gcc_atomic_int64_cas" = x"yes"; then
|
|
AC_DEFINE(HAVE_GCC__ATOMIC_INT64_CAS, 1, [Define to 1 if you have __atomic_compare_exchange_n(int64 *, int *, int64).])
|
|
fi])# PGAC_HAVE_GCC__ATOMIC_INT64_CAS
|