From a8b2400f7b18f05791c4db2f46d9772410f19a2c Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Mon, 26 Apr 2004 10:19:44 -0400
Subject: [PATCH] BUG#502: Do not let optimizing compilers think the symbol
 exists.  Require the symbol by making the return value depend on it to force
 linking.

---
 Modules/CheckVariableExists.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/Modules/CheckVariableExists.c b/Modules/CheckVariableExists.c
index 419c1b02e..752f6e486 100644
--- a/Modules/CheckVariableExists.c
+++ b/Modules/CheckVariableExists.c
@@ -9,10 +9,8 @@ int main(){
 #else
 int main(int ac, char*av[]){
 #endif
-  int* p;
-  p = &CHECK_VARIABLE_EXISTS;
   if(ac > 1000){return *av[0];}
-  return 0;
+  return CHECK_VARIABLE_EXISTS;
 }
 
 #else  /* CHECK_VARIABLE_EXISTS */