$OpenBSD: patch-configure,v 1.1 2018/04/28 20:50:52 jca Exp $

Index: configure
--- configure.orig
+++ configure
@@ -4432,9 +4432,8 @@ cat >>conftest.$ac_ext <<_ACEOF
 int
 main ()
 {
-pow(a,b)
+return pow(a,b)
   ;
-  return 0;
 }
 _ACEOF
 rm -f conftest.$ac_objext conftest$ac_exeext
