From: Jakub Jelinek <jakub@redhat.com>
To: Andreas Jaeger <aj@suse.de>
Cc: John David Anglin <dave@hiauly1.hia.nrc.ca>,
gcc@gcc.gnu.org, libc-alpha@sources.redhat.com
Subject: Re: Miscompilation of glibc with CVS mainline
Date: Thu, 02 Jan 2003 13:27:00 -0000 [thread overview]
Message-ID: <20030102142706.D1218@sunsite.ms.mff.cuni.cz> (raw)
In-Reply-To: <u8d6nfvgj2.fsf@gromit.moeb>; from aj@suse.de on Thu, Jan 02, 2003 at 02:16:01PM +0100
On Thu, Jan 02, 2003 at 02:16:01PM +0100, Andreas Jaeger wrote:
> I could reproduce this with a simple hello-world program and also with
> some smaller program, it is indeed a bug in handling of weak extern
> functions.
>
> Here's a small testcase that has the same behaviour:
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> extern void weak_func (void *arg);
> asm (".weak weak_func");
>
> void
> test (void *arg)
> {
> if (&weak_func != (void *)0)
> weak_func (arg);
>
> }
As GCC is not told in any way that weak_func is actually weak, I think
it is glibc's fault.
Does:
#define weak_extern(x) extern __typeof (x) x __attribute__((weak));
work ok?
Jakub
next prev parent reply other threads:[~2003-01-02 13:27 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-01 17:43 John David Anglin
2003-01-02 13:18 ` Andreas Jaeger
2003-01-02 13:27 ` Jakub Jelinek [this message]
2003-01-02 13:53 ` Andreas Jaeger
2003-01-02 14:41 ` Andreas Jaeger
2003-01-02 21:10 ` Andreas Jaeger
2003-01-02 17:38 ` John David Anglin
2003-01-02 17:48 ` "Martin v. Löwis"
2003-01-02 18:52 ` John David Anglin
2003-01-02 18:58 ` Paul Jarc
2003-01-02 19:10 ` Dale Johannesen
2003-01-02 19:16 ` John David Anglin
2003-01-02 19:26 ` Paul Jarc
2003-01-02 20:25 ` Martin v. Löwis
2003-01-02 22:11 ` Richard Henderson
2003-01-03 1:02 ` John David Anglin
2003-01-03 1:35 ` Richard Henderson
2003-01-02 19:42 ` Ulrich Drepper
2003-01-02 22:16 ` Richard Henderson
2003-01-03 0:14 ` Fergus Henderson
-- strict thread matches above, loose matches on Subject: below --
2003-01-04 18:54 Robert Dewar
2003-01-04 17:52 Robert Dewar
[not found] <no.id>
2003-01-02 17:48 ` John David Anglin
2003-01-02 17:54 ` Jakub Jelinek
2003-01-02 18:58 ` John David Anglin
2003-01-02 17:57 ` Daniel Jacobowitz
2003-01-01 13:37 Andreas Jaeger
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