make sure atomic operations are linkable; fixes #860

diff --git a/m4/ax_c___atomic.m4 b/m4/ax_c___atomic.m4
index 046a5514b81a2edcfb960a78df3554137bb38c21..131929ae1879887631897dd659a1f3eeb71e3583 100644 (file)
--- a/m4/ax_c___atomic.m4
+++ b/m4/ax_c___atomic.m4
@@ -4,7 +4,7 @@
 AN_IDENTIFIER([__atomic], [AC_C___ATOMIC])
 AC_DEFUN([AC_C___ATOMIC],
 [AC_CACHE_CHECK([for __atomic], ac_cv_c___atomic,
-[AC_COMPILE_IFELSE(
+[AC_LINK_IFELSE(
    [AC_LANG_SOURCE(
       [[int
         main (int argc, char **argv)