From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21629 invoked by alias); 18 Nov 2002 23:56:02 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 21611 invoked by uid 71); 18 Nov 2002 23:56:02 -0000 Date: Sun, 24 Nov 2002 17:24:00 -0000 Message-ID: <20021118235602.21610.qmail@sources.redhat.com> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, From: Agthorr Subject: Re: c/8609: Superfluous warning when -std=c99/gnu99 and noreturn on main() Reply-To: Agthorr X-SW-Source: 2002-11/txt/msg00926.txt.bz2 List-Id: The following reply was made to PR c/8609; it has been noted by GNATS. From: Agthorr To: bangerth@dealii.org, 141015@bugs.debian.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, gcc-gnats@Gcc.gnu.org Cc: Subject: Re: c/8609: Superfluous warning when -std=c99/gnu99 and noreturn on main() Date: Mon, 18 Nov 2002 15:47:24 -0800 Well, I also compile with -Wmissing-noreturn. If I add the noreturn attribute to main, gcc complains that the function returns. If I remove the noreturn, gcc complains that the function does not return. gcc can't have it both ways. ;) On Mon, Nov 18, 2002 at 10:55:07PM -0000, bangerth@dealii.org wrote: > Synopsis: Superfluous warning when -std=c99/gnu99 and noreturn on main() > > State-Changed-From-To: open->analyzed > State-Changed-By: bangerth > State-Changed-When: Mon Nov 18 14:55:06 2002 > State-Changed-Why: > I can reproduce this. I think, the warning comes from the fact > that in C99, main() has an implicit "return 0" at its end, > indicating that if you fall off the end of main(), the > programs return value is zero. This also explains why it > only happens with main(), not if you rename the function. > > That being said, since you cannot control who calls main > and how, what reason should you have to mark main() as > noreturn? It should not make any difference, so why do > it? I have difficulty seeing this as a bug... > > http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8609 >