$NetBSD: patch-configure.in,v 1.1 2013/09/10 14:45:48 joerg Exp $

--- configure.in.orig	2013-09-10 11:49:55.000000000 +0000
+++ configure.in
@@ -42,6 +42,8 @@ AC_REPLACE_FUNCS(memchr stpcpy)
 
 dnl for VC++
 case "$ac_cv_prog_CC" in
+ clang*)
+   ;;
  cl*)  AC_DEFINE(alloca, _alloca) ;;
  *)    ;;
 esac