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Date: Fri, 16 Mar 2012 08:19:00 -0000
From: Jan Kratochvil <jan.kratochvil@redhat.com>
To: Yao Qi <yao@codesourcery.com>
Cc: asmwarrior <asmwarrior@gmail.com>, gdb-patches@sourceware.org
Subject: [commit] [msys+mingw] build error [-Werror=uninitialized]
Message-ID: <20120316081921.GB17525@host2.jankratochvil.net>
References: <4F629DE1.8060002@gmail.com> <4F62EAC8.8020000@codesourcery.com> <4F62EC5C.1050609@gmail.com> <4F62EF65.1030203@codesourcery.com>
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On Fri, 16 Mar 2012 08:44:37 +0100, Yao Qi wrote:
> On 03/16/2012 03:31 PM, asmwarrior wrote:
> > TRY_CATCH (ex, RETURN_MASK_ERROR)
> >     {
> >       addr = value_as_address (vfn);
> >     }
> > Which means addr is set before passed to print_function_pointer_address() call.
> > 
> > So I'm not sure why gcc report such warning.
> 
> No idea on this.  Patch below fixes the problem on my box.

Added there a comment like in other cases.

This improper warning happens with TRY_CATCH on older gccs.


Thanks,
Jan


http://sourceware.org/ml/gdb-cvs/2012-03/msg00203.html

--- src/gdb/ChangeLog	2012/03/15 18:53:42	1.14016
+++ src/gdb/ChangeLog	2012/03/16 08:18:07	1.14017
@@ -1,3 +1,9 @@
+2012-03-16  Yao Qi  <yao@codesourcery.com>
+	    Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	Fix false compilation warning.
+	* gnu-v3-abi.c (print_one_vtable): Initialize ADDR.
+
 2012-03-15  Jonathan Larmour  <jifl@eCosCentric.com>
 	    Pedro Alves  <pedro@codesourcery.com>
 
--- src/gdb/gnu-v3-abi.c	2012/03/15 15:43:11	1.70
+++ src/gdb/gnu-v3-abi.c	2012/03/16 08:18:09	1.71
@@ -869,8 +869,9 @@
 
   for (i = 0; i <= max_voffset; ++i)
     {
+      /* Initialize it just to avoid a GCC false warning.  */
+      CORE_ADDR addr = 0;
       struct value *vfn;
-      CORE_ADDR addr;
       volatile struct gdb_exception ex;
 
       printf_filtered ("[%d]: ", i);