diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index ae7b61c7eff..e93bae92666 100644 --- a/configure.ac +++ b/configure.ac @@ -891,6 +891,19 @@ 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_LANG_CONFTEST([int main() { long int a = 4; __sync_fetch_and_add_8 (&a, 1); }]) +$CC conftest.c $CFLAGS -o conftest > /dev/null 2> /dev/null +ret=$? +rm -f conftest.o conftest +if test $ret -eq 0 ; then + echo "yes" + AC_DEFINE(HAVE_ATOMIC_BUILTINS, 1, [have atomic builtins]) +else + echo "no" +fi + AC_CHECK_HEADER([malloc.h], AC_DEFINE(HAVE_MALLOC_H, 1, [have malloc.h])) AC_CHECK_FUNC([llistxattr], [have_llistxattr=yes]) |