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Date: Fri, 20 Sep 2002 22:41:38 +0100
From: Neil Booth <neil@daikokuya.co.uk>
To: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
Cc: jt@hpl.hp.com, Jeff Garzik <jgarzik@mandrakesoft.com>,
       thunder@lightweight.ods.org, linux-kernel@vger.kernel.org
Subject: Re: FW: 2.5.34: IR __FUNCTION__ breakage
Message-ID: <20020920214138.GA9638@daikokuya.co.uk>
References: <20020920171901.GG8260@bougret.hpl.hp.com> <Pine.BSF.4.44.0209202006040.13460-100000@e0-0.zab2.int.zabbadoz.net>
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Bjoern A. Zeeb wrote:-

> > > Also, specifically relating to varargs macros as described above, you
> > > can certainly have a varargs macro with zero args, just look at C99
> > > varargs macros...
> >
> > 	I remember that it didn't work. Ok, I'll try again.
> 
> if I remember corretly with C99 if you do s.th. like this (simple
> sample):
> 
> #define LOG(level, format, ...)					\
>                 log(level, format, ##__VA_ARGS__);

No, this is only valid C99 if __VA_ARGS__ is the empty list.

I posted the correct way to write this macro about a week ago that
works with all versions of GCC (and follows their documented
behaviour; this stuff *is* all documented).

Neil.
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