$NetBSD: patch-configure,v 1.1 2017/10/19 13:51:34 jperkin Exp $

Don't define _XOPEN_SOURCE if using C99.

--- configure.orig	2011-06-14 21:38:29.000000000 +0000
+++ configure
@@ -12574,10 +12574,12 @@ rm -f conftest*
 case $host in
 *-*-solaris*)
 
+$as_echo "#if (__STDC_VERSION__ - 0 < 199901L)" >>confdefs.h
 $as_echo "#define _XOPEN_SOURCE_EXTENDED 1" >>confdefs.h
 
 
 $as_echo "#define _XOPEN_SOURCE 1" >>confdefs.h
+$as_echo "#endif" >>confdefs.h
 
 
 $as_echo "#define __EXTENSIONS__ 1" >>confdefs.h