From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-return-199327-listarch-gcc=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 115548 invoked by alias); 10 Jun 2019 18:32:47 -0000
Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc/>
List-Post: <mailto:gcc@gcc.gnu.org>
List-Help: <http://gcc.gnu.org/ml/>
Sender: gcc-owner@gcc.gnu.org
Received: (qmail 115423 invoked by uid 89); 10 Jun 2019 18:32:47 -0000
Authentication-Results: sourceware.org; auth=none
X-Spam-SWARE-Status: No, score=-2.1 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 spammy=jozefl.gcc@gmail.com, jozeflgccgmailcom, dirty
X-HELO: gate.crashing.org
Received: from gate.crashing.org (HELO gate.crashing.org) (63.228.1.57) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 10 Jun 2019 18:32:45 +0000
Received: from gate.crashing.org (localhost.localdomain [127.0.0.1])	by gate.crashing.org (8.14.1/8.14.1) with ESMTP id x5AIWgbT000961;	Mon, 10 Jun 2019 13:32:43 -0500
Received: (from segher@localhost)	by gate.crashing.org (8.14.1/8.14.1/Submit) id x5AIWgIO000960;	Mon, 10 Jun 2019 13:32:42 -0500
Date: Mon, 10 Jun 2019 18:32:00 -0000
From: Segher Boessenkool <segher@kernel.crashing.org>
To: Jozef Lawrynowicz <jozefl.gcc@gmail.com>
Cc: Richard Biener <richard.guenther@gmail.com>,        David Malcolm <dmalcolm@redhat.com>, GCC Development <gcc@gcc.gnu.org>
Subject: Re: Preventing ISO C errors when using macros for builtin types
Message-ID: <20190610183242.GG31586@gate.crashing.org>
References: <20190605142559.05791323@jozef-kubuntu> <CAFiYyc3cVsk1phrC0gTJa=mJOjzCJ-Be2GTaaYoJemCNBRYb0w@mail.gmail.com> <20190610172031.66eabae6@jozef-kubuntu>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20190610172031.66eabae6@jozef-kubuntu>
User-Agent: Mutt/1.4.2.3i
X-IsSubscribed: yes
X-SW-Source: 2019-06/txt/msg00084.txt.bz2

On Mon, Jun 10, 2019 at 05:20:31PM +0100, Jozef Lawrynowicz wrote:
> On Thu, 6 Jun 2019 10:09:32 +0200
> Richard Biener <richard.guenther@gmail.com> wrote:
> 
> > On Wed, Jun 5, 2019 at 3:26 PM Jozef Lawrynowicz <jozefl.gcc@gmail.com> wrote:
> > >
> > > I would appreciate if anyone can help me decide if:
> > > - It would be OK for the use of builtin macros such as __SIZE_TYPE__ to somehow
> > >   not trigger the "pedantic errors", and what a valid approach might look like  
> > 
> > I think that would be OK - note you could also modify your target board.
> 
> I'm now realising that the most straightforward way to fix this issue will be
> to just modify the configuration of the DejaGNU target board, so that
> DEFAULT_CFLAGS is set there and declarations of DEFAULT_CFLAGS in the testsuite
> that would set -pedantic-errors are never used.

That is not a fix, that is sweeping the problem under the rug.

As a somewhat dirty hack I added

#if __MSP430X_LARGE__
#undef __SIZE_TYPE__
__extension__ typedef unsigned __int20 __SIZE_TYPE__;
#endif

to the start of the installed stddef.h, and that fixes the problem fine,
for correct programs that do not forget to include <stddef.h> (directly
or indirectly), anyway.


Segher