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From: Bruce M Simpson <bms@FreeBSD.org>
Date: Wed, 22 Jul 2009 01:07:50 +0000 (UTC)
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Subject: svn commit: r195816 - stable/7/contrib/gcc
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Author: bms
Date: Wed Jul 22 01:07:49 2009
New Revision: 195816
URL: http://svn.freebsd.org/changeset/base/195816

Log:
  Output DWARF debug information for global 'using' declarations, instead
  of just blowing up. A very similar change to this exists which is
  GPLv3 licensed, this is my own change.
  
  This problem was triggered by running the Boost regression tests.
  
  See also:	http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31899
  Reviewed by:	luigi

Modified:
  stable/7/contrib/gcc/dwarf2out.c

Modified: stable/7/contrib/gcc/dwarf2out.c
==============================================================================
--- stable/7/contrib/gcc/dwarf2out.c	Wed Jul 22 01:07:11 2009	(r195815)
+++ stable/7/contrib/gcc/dwarf2out.c	Wed Jul 22 01:07:49 2009	(r195816)
@@ -10007,7 +10007,7 @@ reference_to_unused (tree * tp, int * wa
     return NULL_TREE;
   else if (!cgraph_global_info_ready
 	   && (TREE_CODE (*tp) == VAR_DECL || TREE_CODE (*tp) == FUNCTION_DECL))
-    gcc_unreachable ();
+    return *tp;
   else if (DECL_P (*tp) && TREE_CODE (*tp) == VAR_DECL)
     {
       struct cgraph_varpool_node *node = cgraph_varpool_node (*tp);