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Date: Tue, 31 Jan 2006 21:37:05 +0100
From: "Gerrit P. Haase" <gerrit AT familiehaase DOT de>
Reply-To: "Gerrit P. Haase" <gerrit AT familiehaase DOT de>
Message-ID: <132753246.20060131213705@familiehaase.de>
To: Peter Ekberg <peda AT lysator DOT liu DOT se>
CC: cygwin AT cygwin DOT com
Subject: Re: ATT: gcc maintainer (was Re: cpp does not honor the -undef option.)
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Peter schrieb:

> On Mon, Jan 23, 2006 at 10:01:44PM +0100, Peter Ekberg wrote:
>> On Mon, Jan 16, 2006 at 12:13:12PM +0100, Peter Ekberg wrote:
>> > On Mon, Jan 09, 2006 at 10:58:00AM +0100, Peter Ekberg wrote:
>> > > Hello!
>> > > 
>> > > I recently tried to build a package that was using cpp for other
>> > > purposes than preprocessing C files. Its configure script was
>> > > looking for a way to not have cpp predefine anything, and it
>> > > specifically tried the -undef option, but failed. From reading the
>> > > docs, I couldn't figure out why. Here's a quote from "info cpp":
>> > > 
>> > > '-undef'
>> > >      Do not predefine any system-specific or GCC-specific macros.  The
>> > >      standard predefined macros remain defined.  *Note Standard
>> > >      Predefined Macros::.
>> > > 
>> > > So I searched the web a bit and figured that I could probably fix
>> > > it in the specs file. I realise that the specs file probably isn't
>> > > the canonical place to change this, but I'll leave that to the gcc
>> > > maintainer.
>> > > 
>> > > Attached is a patch for the specs file that wraps all old define
>> > > rules for cpp inside the following:
>> > > 
>> > > %{!undef:old define rules}
>> > > 
>> > > I don't know if this is the correct thing to do, but it works for
>> > > me<TM>.
>> > 
>> > GCC maintainer, are you there? Can you come out and play, please? :-)
>> 
>> Ping.

> Pong.

Peng.


Looks like a reasonable approach to fix this.  However, the specs should
not override -undef, looks like a bug in cpp.  Have you reported this as
a bug to the gcc bug tracker?


Gerrit
-- 
=^..^=


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