diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/configure.ac b/configure.ac index c7b6c38c002..c2d03e7ee6a 100644 --- a/configure.ac +++ b/configure.ac @@ -956,16 +956,19 @@ AC_SUBST(ARGP_STANDALONE_CPPFLAGS) AC_SUBST(ARGP_STANDALONE_LDADD) AC_SUBST(ARGP_STANDALONE_DIR) -# Check for atomic operation support -echo -n "checking for atomic operation support... " -AC_LINK_IFELSE([AC_LANG_SOURCE([[int main() { long int a = 4; __sync_fetch_and_add_8 (&a, 1); }]])], - [have_sync_fetch_and_add_8=yes], [have_sync_fetch_and_add_8=no]) -if test "x${have_sync_fetch_and_add_8}" = "xyes"; then - echo "yes" - AC_DEFINE(HAVE_ATOMIC_BUILTINS, 1, [have atomic builtins]) -else - echo "no" +dnl Check for atomic operation support +AC_CHECK_FUNC([__atomic_load], [have_atomic_builtins]) +if test "x${have_atomic_builtins}" = "xyes"; then + AC_DEFINE(HAVE_ATOMIC_BUILTINS, 1, [define if __atomic_*() builtins are available]) +fi +AC_SUBST(HAVE_ATOMIC_BUILTINS) + +dnl __sync_*() will not be needed if __atomic_*() is available +AC_CHECK_FUNC([__sync_fetch_and_add], [have_sync_builtins]) +if test "x${have_sync_builtind}" = "xyes"; then + AC_DEFINE(HAVE_SYNC_BUILTINS, 1, [define if __sync_*() builtins are available]) fi +AC_SUBST(HAVE_SYNC_BUILTINS) AC_CHECK_HEADER([malloc.h], AC_DEFINE(HAVE_MALLOC_H, 1, [have malloc.h])) |