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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next prev parent 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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