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To: Bernardo Innocenti <bernie@develer.com>
Cc: Richard Henderson <rth@redhat.com>, Andrew Pinski <pinskia@physics.uc.edu>,
        GCC Patches <gcc-patches@gcc.gnu.org>, gdb-patches@redhat.com,
        binutils@redhat.com, Ian Lance Taylor <ian@wasabisystems.com>,
        DJ Delorie <dj@redhat.com>
Subject: Re: [libiberty] Add ARG_UNUSED as a C++-friendly replacement for
 ATTRIBUTE_UNUSED
From: Jason Merrill <jason@redhat.com>
In-Reply-To: <40F39A33.5040706@develer.com> (Bernardo Innocenti's message of
 "Tue, 13 Jul 2004 10:15:47 +0200")
References: <200407120419.i6C4Jq318362@tin.geop.uc.edu>
	<40F3944C.1000502@develer.com> <20040713081153.GA3089@redhat.com>
	<40F39A33.5040706@develer.com>
Date: Tue, 13 Jul 2004 17:11:00 -0000
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On Tue, 13 Jul 2004 10:15:47 +0200, Bernardo Innocenti <bernie@develer.com> wrote:

> Richard Henderson wrote:
>> On Tue, Jul 13, 2004 at 09:50:36AM +0200, Bernardo Innocenti wrote:
>> 
>>>define ARG_UNUSED(T,N) to "T N").
>> 
>> 
>> If we do this, I'd prefer
>> 
>> 	T ARG_UNUSED(N)
>> 
>> #ifdef __cplusplus
>> # define ARG_UNUSED(N)
>> #elif somegccversion
>> # define ARG_UNUSED(N)	N ATTRIBUTE_UNUSED
>> #else
>> # define ARG_UNUSED(N)	N
>> #endif
>
> This wouldn't allow us to support g++ < 3.4:
>
>  # define ARG_UNUSED(T,N)   ATTRIBUTE_UNUSED T N

Huh?  rth's definition above supports all C++ compilers just fine.

Jason