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From: Mike Stump <mikestump@comcast.net>
Subject: fix testsuite/48506
Date: Fri, 8 Apr 2011 17:00:53 -0700
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I've checked in this to avoid problems with ports that default to -fno-common.  I've also checked it into 4.6.x.
PR testsuite/48506
	* gcc.dg/tree-ssa/ssa-ccp-17.c: Robustify against ports that
	default to fno-common.

Index: gcc.dg/tree-ssa/ssa-ccp-17.c
===================================================================
--- gcc.dg/tree-ssa/ssa-ccp-17.c	(revision 172125)
+++ gcc.dg/tree-ssa/ssa-ccp-17.c	(working copy)
@@ -18,7 +18,7 @@
   return ((struct Foo *)p)->i;
 }
 
-const struct Foo g;
+extern const struct Foo g;
 
 int foobar(void)
 {