From: "Alexey I. Froloff" <raorn@immo.ru>
To: ALT Devel discussion list <devel@lists.altlinux.org>
Subject: Re: [devel] Q: gcc/ld madness
Date: Sat, 22 Sep 2007 14:29:48 +0400
Message-ID: <20070922102948.GA31033@hell.fortress> (raw)
In-Reply-To: <20070922100716.GA8416@lks.home>
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* Konstantin A. Lepikhov <lakostis@> [070922 14:13]:
> echo 'int main(int argc, char **argv) { gzdopen(0, "rb"); return 0; }' | \
> gcc -Wall -include zlib.h -x c -o a.out -lz -
gcc -Wall -include zlib.h -x c -o a.out - -lz
> PS Если уши растут из as-needed, просьба дать детальное и
> документированное объяснение почему эта ass ломает такие простые примеры.
info ld:
`--as-needed'
`--no-as-needed'
This option affects ELF DT_NEEDED tags for dynamic libraries
mentioned on the command line after the `--as-needed' option.
Normally, the linker will add a DT_NEEDED tag for each dynamic
library mentioned on the command line, regardless of whether the
library is actually needed. `--as-needed' causes DT_NEEDED tags
to only be emitted for libraries that satisfy some symbol
reference from regular objects which is undefined at the point
that the library was linked. `--no-as-needed' restores the
default behaviour.
Собсно, в первом случае в момент линковки libz нет ссылок на
символы оттуда, во втором они появляются. Это уже неоднократно
здесь обсуждалось.
--
Regards,
Sir Raorn.
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next prev parent reply other threads:[~2007-09-22 10:29 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-22 10:07 Konstantin A. Lepikhov
2007-09-22 10:14 ` Andrey Rahmatullin
2007-09-22 10:31 ` Konstantin A. Lepikhov
2007-09-22 10:29 ` Alexey I. Froloff [this message]
2007-09-22 11:21 ` Konstantin A. Lepikhov
2007-09-22 11:43 ` Alexey I. Froloff
2007-09-22 11:59 ` Dmitry V. Levin
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