From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-help-return-51616-listarch-gcc-help=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 32290 invoked by alias); 22 Nov 2012 15:49:08 -0000
Received: (qmail 32281 invoked by uid 22791); 22 Nov 2012 15:49:06 -0000
X-SWARE-Spam-Status: No, hits=-7.4 required=5.0	tests=AWL,BAYES_00,KHOP_RCVD_UNTRUST,KHOP_THREADED,RCVD_IN_DNSWL_HI,RCVD_IN_HOSTKARMA_W,RP_MATCHES_RCVD,SPF_HELO_PASS
X-Spam-Check-By: sourceware.org
Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 22 Nov 2012 15:48:58 +0000
Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24])	by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id qAMFmwSK027871	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK);	Thu, 22 Nov 2012 10:48:58 -0500
Received: from zebedee.pink (ovpn-113-82.phx2.redhat.com [10.3.113.82])	by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id qAMFmtTJ003576;	Thu, 22 Nov 2012 10:48:57 -0500
Message-ID: <50AE4967.8090007@redhat.com>
Date: Thu, 22 Nov 2012 15:49:00 -0000
From: Andrew Haley <aph@redhat.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120911 Thunderbird/15.0.1
MIME-Version: 1.0
To: LAMOME Julien CS-SI <julien.lamome-cs-si@irsn.fr>
CC: gcc-help@gcc.gnu.org
Subject: Re: [C++] anonymous struct linkage
References: <72041471EE7D1540B7ECD771EA430DB7062251ED@AMESS102.proton.intra.irsn.fr>
In-Reply-To: <72041471EE7D1540B7ECD771EA430DB7062251ED@AMESS102.proton.intra.irsn.fr>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes
Mailing-List: contact gcc-help-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-help.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-help/>
List-Post: <mailto:gcc-help@gcc.gnu.org>
List-Help: <mailto:gcc-help-help@gcc.gnu.org>
Sender: gcc-help-owner@gcc.gnu.org
X-SW-Source: 2012-11/txt/msg00174.txt.bz2

On 11/22/2012 03:44 PM, LAMOME Julien CS-SI wrote:
> Hi,
> we have a code mixing C++ and Fortran 77. In fortran, we have some COMMON like :
> COMMON / DEMOF/VARIABLE
> Which are include in fortran source file like this :
> #include <demof.include>
> 
> We link with C++ code like this :
> struct { double variable}demof ;
> 
> The problem is : 
> Between gcc 4.3 and gcc 4.6, the linkage of demof (in C++) change from global to local. This breaks the link between C++ and fortran.
> 
> How can I restore the global linkage in gcc 4.6 ?

That doesn't sound right.  Please send us example code.

Andrew.