From 56699cd6036a52abaf62a2d3097538b883d1edcb Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Fri, 26 Sep 2014 11:09:21 -0300
Subject: [PATCH] small change to avoid bug in some versions of the clang
 compiler

---
 liolib.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/liolib.c b/liolib.c
index 42dcb7ef..b5f7af7b 100644
--- a/liolib.c
+++ b/liolib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c,v 2.127 2014/06/30 19:48:08 roberto Exp roberto $
+** $Id: liolib.c,v 2.128 2014/07/29 16:01:00 roberto Exp roberto $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -193,9 +193,14 @@ static LStream *newprefile (lua_State *L) {
 }
 
 
+/*
+** Calls the 'close' function from a file handle. The 'volatile' avoids
+** a bug in some verisions of the Clang compiler (e.g., clang 3.0 for
+** 32 bits).
+*/
 static int aux_close (lua_State *L) {
   LStream *p = tolstream(L);
-  lua_CFunction cf = p->closef;
+  volatile lua_CFunction cf = p->closef;
   p->closef = NULL;  /* mark stream as closed */
   return (*cf)(L);  /* close it */
 }