From 5bcece537e2be12fd13ea85a636ba2e28c66c256 Mon Sep 17 00:00:00 2001
From: Christophe Fergeau <cfergeau@redhat.com>
Date: Wed, 29 Feb 2012 19:01:58 +0100
Subject: [PATCH] mingw: don't try to redefine alloca

mingw already has a #define alloca __builtin_alloca so trying to
redefine it triggers a warning.
---
 mem.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mem.h b/mem.h
index 980ea13..af89ba6 100644
--- a/mem.h
+++ b/mem.h
@@ -41,7 +41,9 @@ extern "C" {
 #ifdef HAVE_ALLOCA_H
 # include <alloca.h>
 #elif defined __GNUC__
+#if !defined alloca
 # define alloca __builtin_alloca
+#endif
 #elif defined _AIX
 # define alloca __alloca
 #elif defined _MSC_VER