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From: "H. Peter Anvin" <hpa@zytor.com>
To: Roland McGrath <roland@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	David Daney <ddaney@caviumnetworks.com>,
	akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>,
	x86@kernel.org
Subject: Re: [PATCH 02/10] x86: Convert BUG() to use unreachable()
Date: Thu, 10 Sep 2009 18:42:24 -0700	[thread overview]
Message-ID: <4AA9AB00.9030607@zytor.com> (raw)
In-Reply-To: <20090911013743.1CF13AEF@magilla.sf.frob.com>

On 09/10/2009 06:37 PM, Roland McGrath wrote:
>> There are other cases where that kind of config-time testing could be 
>> useful, and we could avoid doing various gcc checks dynamically from 
>> within 'make' (along with checking for known-buggy versions etc).
> 
> I quite agree that this would be an improvement for many sorts of compiler
> feature (and other tool detail) conditionalization.

The nicest, of course, would be if gcc exported its internal support,
similar to the way it nowadays export macros for the various internal
data types.

	-hpa

  reply	other threads:[~2009-09-11  1:43 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-09-10 23:54 [PATCH 00/10] Add support for GCC's __builtin_unreachable() and use it in BUG David Daney
2009-09-10 23:54 ` David Daney
2009-09-10 23:56 ` [PATCH 01/10] Add support for GCC-4.5's __builtin_unreachable() to compiler.h David Daney
2009-09-10 23:56   ` David Daney
2009-09-10 23:56   ` David Daney
2009-09-10 23:56   ` David Daney
2009-09-11  0:14   ` Richard Henderson
2009-09-11  0:14     ` Richard Henderson
2009-09-11  0:14     ` Richard Henderson
2009-09-11 14:32   ` Michael Buesch
2009-09-11 14:32     ` Michael Buesch
2009-09-11 14:32     ` Michael Buesch
2009-09-11 15:58     ` David Daney
2009-09-11 15:58       ` David Daney
2009-09-11 15:58       ` David Daney
2009-09-11 15:58       ` David Daney
2009-09-12  7:22       ` Geert Uytterhoeven
2009-09-12  7:22         ` Geert Uytterhoeven
2009-09-12  7:22         ` Geert Uytterhoeven
2009-09-12  7:22         ` Geert Uytterhoeven
2009-09-12  7:22         ` Geert Uytterhoeven
2009-09-12  7:22         ` Geert Uytterhoeven
2009-09-14 15:40         ` David Daney
2009-09-14 15:40           ` David Daney
2009-09-14 15:40           ` David Daney
2009-09-14 15:40           ` David Daney
2009-09-10 23:56 ` [PATCH 02/10] x86: Convert BUG() to use unreachable() David Daney
2009-09-11  0:56   ` H. Peter Anvin
2009-09-11  1:09     ` Roland McGrath
2009-09-11  1:13     ` Linus Torvalds
2009-09-11  1:33       ` H. Peter Anvin
2009-09-11  1:37       ` Roland McGrath
2009-09-11  1:42         ` H. Peter Anvin [this message]
2009-09-11  6:07       ` Ingo Molnar
2009-09-11 15:55         ` David Daney
2009-09-13 20:12           ` H. Peter Anvin
2009-09-10 23:56 ` [PATCH 03/10] MIPS: " David Daney
2009-09-10 23:56 ` [PATCH 04/10] s390: " David Daney
2009-09-11 12:18   ` Martin Schwidefsky
2009-09-11 12:18     ` Martin Schwidefsky
2009-09-10 23:56 ` [PATCH 05/10] mn10300: " David Daney
2009-09-10 23:56 ` [PATCH 06/10] parisc: " David Daney
2009-09-28  3:20   ` Kyle McMartin
2009-09-10 23:56 ` [PATCH 07/10] powerpc: " David Daney
2009-09-10 23:56   ` David Daney
2009-09-10 23:56 ` [PATCH 08/10] alpha: " David Daney
2009-09-10 23:56 ` [PATCH 09/10] avr32: " David Daney
2009-09-11  7:31   ` Haavard Skinnemoen
2009-09-10 23:56 ` [PATCH 10/10] blackfin: " David Daney
2009-09-24  3:37 ` [PATCH 00/10] Add support for GCC's __builtin_unreachable() and use it in BUG Benjamin Herrenschmidt

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