$NetBSD: patch-configure.ac,v 1.1 2013/09/10 14:25:24 joerg Exp $

--- configure.ac.orig	2013-09-10 09:37:50.000000000 +0000
+++ configure.ac
@@ -68,6 +68,8 @@ use_msvc=no
 AC_SUBST([LIBFLAGS],[])
 AC_SUBST([LIBEXT],[])
 case "$CXX" in
+	clang*|CLANG*)
+		;;
 		cl*|CL*)
 		CXXFLAGS="-nologo -W1 -EHsc -DWIN32"
 		if test x"$enable_shared" = "xyes"; then