From: tom st denis <tomstdenis@yahoo.com>
To: linux-kernel@vger.kernel.org
Subject: Re: Prohibited attachment type (was 0xdeadbeef)
Date: Wed, 7 Jul 2004 04:48:36 -0700 (PDT) [thread overview]
Message-ID: <20040707114836.29295.qmail@web41103.mail.yahoo.com> (raw)
In-Reply-To: <Pine.LNX.4.53.0407070715380.17430@chaos>
--- "Richard B. Johnson" <root@chaos.analogic.com> wrote:
> Tom is correct. A literal constant defaults to 'int'.
I did a bit more messing around with GCC and it seems in
int x = 4;
if (x == 0xDEADBEEF) { ... }
It will warn that 0xDEADBEEF is unsigned (which it isn't). Either
there is an obscure clause in the C standard [I personally don't have a
copy of C99 nor do I plan on reading it for this] or GCC cause an
incorrect diagnostic [which isn't in violation of the standards...]
Really GCC should just warn that 0xDEADBEEF is not a valid int constant
[for portability sake...]. It's simple, any constant > 16-bits should
have a UL/L or ULL/LL suffix.
Tom
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next prev parent reply other threads:[~2004-07-07 11:48 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-06 21:56 0xdeadbeef vs 0xdeadbeefL David Eger
2004-07-07 0:06 ` tom st denis
2004-07-07 3:00 ` viro
2004-07-07 11:10 ` tom st denis
2004-07-07 11:18 ` Prohibited attachment type (was 0xdeadbeef) Richard B. Johnson
2004-07-07 11:48 ` tom st denis [this message]
2004-07-07 12:29 ` Jakub Jelinek
2004-07-08 5:52 ` Pavel Machek
2004-07-08 14:03 ` Jakub Jelinek
2004-07-07 12:13 ` R. J. Wysocki
2004-07-07 14:22 ` 0xdeadbeef vs 0xdeadbeefL viro
2004-07-07 18:47 ` tom st denis
2004-07-07 16:30 ` Gabriel Paubert
2004-07-07 18:41 ` tom st denis
2004-07-07 18:47 ` Christoph Hellwig
2004-07-07 18:53 ` tom st denis
2004-07-07 23:17 ` Harald Arnesen
2004-07-08 6:15 ` David Weinehall
2004-07-08 9:32 ` [OT] " Gabriel Paubert
2004-07-08 11:15 ` viro
2004-07-08 11:55 ` Gabriel Paubert
2004-07-08 16:41 ` Andries Brouwer
2004-07-08 17:13 ` Michael Driscoll
2004-07-08 17:16 ` Horst von Brand
2004-07-10 1:52 ` Andrew Rodland
2004-07-07 0:38 ` Richard B. Johnson
2004-07-07 4:52 ` David Eger
2004-07-07 11:40 ` Richard B. Johnson
2004-07-07 15:57 Prohibited attachment type (was 0xdeadbeef) Ray Lee
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