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Re: gcc "bug"

From: "Joseph S. Myers" <jsm at polyomino dot org dot uk>
To: Falk Hueffner <falk dot hueffner at student dot uni-tuebingen dot de>
Cc: Jeffrey Hammel <jhammel at EECS dot Berkeley dot EDU>, gcc-bugs at gcc dot gnu dot org, alanwu at langmuir dot eecs dot berkeley dot edu
Date: Tue, 17 Feb 2004 00:49:12 +0000 (UTC)
Subject: Re: gcc "bug"
References: <Pine.SOL.4.44.0402161329500.6719-100000@argus.EECS.Berkeley.EDU><87y8r21ykf.fsf@student.uni-tuebingen.de>

On Mon, 16 Feb 2004, Falk Hueffner wrote:

> You need -Wimplicit (or -Wall) to get a warning. This is by design,
> since many old sources use implicit declarations. For new source, you
> should always use -Wall.

Note that these warnings are on by default (and can't be turned off with
-Wno-implicit - mandatory pedwarns) in C99 mode as implicit declarations
are not part of the C99 language at all, so if and when C99 is fully
implemented and -std=gnu99 becomes the default, these warnings will also
be on by default.

-- 
Joseph S. Myers
jsm@polyomino.org.uk

References:
- gcc "bug"
  - From: Jeffrey Hammel
- Re: gcc "bug"
  - From: Falk Hueffner

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