From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1172 invoked by alias); 30 Aug 2011 21:33:50 -0000 Received: (qmail 1161 invoked by uid 22791); 30 Aug 2011 21:33:49 -0000 X-SWARE-Spam-Status: No, hits=-2.1 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KAM_STOCKGEN X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 30 Aug 2011 21:33:36 +0000 From: "burnus at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/45044] Different named COMMON block size: No warning Date: Tue, 30 Aug 2011 21:48:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: fortran X-Bugzilla-Keywords: accepts-invalid, diagnostic X-Bugzilla-Severity: normal X-Bugzilla-Who: burnus at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-08/txt/msg02462.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45044 --- Comment #4 from Tobias Burnus 2011-08-30 21:33:18 UTC --- I was thinking of using: gfc_gsymbol *gsym; gsym = gfc_get_gsymbol (com->name); gcc_assert (gsym->type == GSYM_COMMON); gfc_warning ("Named COMMON block '%s' at %L shall be of the " "same size as at %L (%lu vs %lu bytes)", com->name, &com->where, &gsym->where, But that won't work reliably: a) The byte size changes, while the position of (2) remains the same, e.g: Warnung: Named COMMON block 'xx' at (1) shall be of the same size as at (2) (24 vs 4 bytes) Warnung: Named COMMON block 'xx' at (1) shall be of the same size as at (2) (8 vs 24 bytes) b) One get's even strange results if one has 4 bytes, 30 bytes, 4 bytes as then (1) and (2) have the same bytes size but the error message claims that one is 4 and the other is 30 bytes wide. I defer this and now only print the byte-size, cf. http://gcc.gnu.org/ml/fortran/2011-08/msg00254.html