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From: "Dmitry V. Levin" <ldv@altlinux.org>
To: ALT Devel discussion list <devel@lists.altlinux.org>
Subject: Re: [devel] libstdc++4.1-devel сломан?
Date: Fri, 2 Jun 2006 17:17:57 +0400
Message-ID: <20060602131757.GB4604@basalt.office.altlinux.org> (raw)
In-Reply-To: <20060602110032.GH8164@localhost.localdomain>

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On Fri, Jun 02, 2006 at 03:00:32PM +0400, Alexey Tourbin wrote:
> On Fri, Jun 02, 2006 at 11:47:11AM +0400, Damir Shayhutdinov wrote:
> > 01.06.06, Alexey Tourbin<at@altlinux.ru> написал(а):
> > > > Убрать -Wl,-z,defs - в этом всё равно нет смысла при линковке -shared.
> > >
> > > Почему не имеет смысла?>
> > ld(1)
> > ----
> > -z
> >            defs
> >                Disallows undefined symbols in object files.  Undefined symbols
> >                in shared libraries are still allowed.
> 
> Автор мана имел в виду другое.

Что именно?

> $ cat test.c
> test()
> {
>         no_such_function();
> }
> $ gcc -shared -fPIC -o libtest.so test.c
> $ ls -l libtest.so
> -rwxr-xr-x 1 at at 5591 Jun  2 14:54 libtest.so
> $ gcc -shared -fPIC -o libtest.so test.c -Wl,-z,defs
> /tmp/.private/at/ccCRSta9.o: In function `test':
> test.c:(.text+0x14): undefined reference to `no_such_function'
> collect2: ld returned 1 exit status
> $ 

Ну и что?  Часть символов живёт в ld.so и тем самым делает -Wl,-z,defs
малопригодным на практике.


-- 
ldv

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  reply	other threads:[~2006-06-02 13:17 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-06-01 15:36 Valery V. Inozemtsev
2006-06-01 15:43 ` Dmitry V. Levin
2006-06-01 16:23   ` Valery V. Inozemtsev
2006-06-01 16:41   ` Alexey Tourbin
2006-06-02  7:47     ` Damir Shayhutdinov
2006-06-02 11:00       ` Alexey Tourbin
2006-06-02 13:17         ` Dmitry V. Levin [this message]
2006-06-02 13:54           ` Alexey Tourbin
2006-06-02 14:02             ` Dmitry V. Levin
2006-06-02 14:25               ` Alexey Tourbin
2006-06-02 14:01           ` Sergey Vlasov
2006-06-02 14:06             ` Dmitry V. Levin

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