From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-480176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 39704 invoked by alias); 12 Mar 2015 14:36:38 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 39463 invoked by uid 48); 12 Mar 2015 14:36:33 -0000
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/65403] New: -Wno-error=<not implemented> is an error
Date: Thu, 12 Mar 2015 14:36:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 5.0
X-Bugzilla-Keywords: diagnostic
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status keywords bug_severity priority component assigned_to reporter
Message-ID: <bug-65403-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2015-03/txt/msg01320.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65403

            Bug ID: 65403
           Summary: -Wno-error=<not implemented> is an error
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: enhancement
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org

If you want to silence warnings you can use -Wno-XXX without caring about
whether
a compiler implements -WXXX already.  This doesn't seem to work with
-Wno-error=XXX which errors on unknown XXX.

It seems to me that we should treat -W[no-]error=XXX the same as -Wno-XXX
for unknown XXX as it certainly will enable/disable errors for the warning XXX
both if present or not present (no warnings anyway).

> gcc-5 -Wall -Werror -Wno-error=logical-not-parentheses -S t.c
> gcc-4.8 -Wall -Werror -Wno-error=logical-not-parentheses -S t.c
cc1: error: -Werror=logical-not-parentheses: no option
-Wlogical-not-parentheses

> gcc-5 -Wno-error=foo -S t.c
cc1: error: -Werror=foo: no option -Wfoo