From a7794e81894adffc03c3365d57f3670f7a106bd2 Mon Sep 17 00:00:00 2001
From: Alex Shinn <ashinn@users.noreply.github.com>
Date: Tue, 30 Mar 2010 22:03:30 +0900
Subject: [PATCH] only conditionally defining _GNU_SOURCE to avoid warning
 (issue 48)

---
 include/chibi/features.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/chibi/features.h b/include/chibi/features.h
index 8c933bcc..fdb6fe98 100644
--- a/include/chibi/features.h
+++ b/include/chibi/features.h
@@ -197,8 +197,10 @@
 #define SEXP_BSD 1
 #else
 #define SEXP_BSD 0
+#ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
+#endif
 
 #ifndef SEXP_USE_NO_FEATURES
 #define SEXP_USE_NO_FEATURES 0