$OpenBSD: patch-configure_ac,v 1.1 2017/12/02 16:31:06 jca Exp $

Index: configure.ac
--- configure.ac.orig
+++ configure.ac
@@ -236,7 +236,7 @@ dnl
 
 AC_SEARCH_LIBS([pthread_create], [pthread], [have_threads=yes], [have_threads=no])
 AC_MSG_CHECKING([for __sync_add_and_fetch])
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+AC_LINK_IFELSE([AC_LANG_PROGRAM(
     [AC_INCLUDES_DEFAULT
     extern volatile int x;],
     [[printf("%d", __sync_add_and_fetch(&x, 1));]])],
