[PATCH][PING][Revised] fix --enable-build-with-cxx on darwin]

[Jack Howarth <howarth@bromo.med.uc.edu>]

   Could someone commit this patch, which was already approved in

http://gcc.gnu.org/ml/gcc-patches/2011-05/msg00411.html

The absence of this patch in gcc trunk prevents --enable-build-with-cxx 
from working on darwin. Thanks in advance.
          Jack

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Date: Thu, 5 May 2011 08:58:26 -0400
From: Jack Howarth <howarth@bromo.med.uc.edu>
To: gcc-patches@gcc.gnu.org
Subject: [PATCH][Revised] fix --enable-build-with-cxx on darwin
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Currently the bootstrap with --enable-build-with-cxx is broken due to compiler errors of the form
"error: converting 'false' to pointer type 'varpool_node*' [-Werror=conversion-null]". The attached
patch changes the last remaing instance of false to NULL and restores the --enable-build-with-cxx bootstrap.
Tested on x86_64-apple-darwin10. Okay for gcc trunk?
                Jack

2011-05-05  Jack Howarth <howarth@bromo.med.uc.edu>

	* gcc/varpool.c (varpool_extra_name_alias): Likewise.

Index: gcc/varpool.c
===================================================================
--- gcc/varpool.c	(revision 173423)
+++ gcc/varpool.c	(working copy)
@@ -676,7 +676,7 @@ varpool_extra_name_alias (tree alias, tr
 
 #ifndef ASM_OUTPUT_DEF
   /* If aliases aren't supported by the assembler, fail.  */
-  return false;
+  return NULL;
 #endif
 
   gcc_assert (TREE_CODE (decl) == VAR_DECL);

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