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Re: RFC: linker enhancements
- From: "H. J. Lu" <hjl at lucon dot org>
- To: Jakub Jelinek <jakub at redhat dot com>, binutils at sources dot redhat dot com
- Date: Wed, 17 Mar 2004 10:26:16 -0800
- Subject: Re: RFC: linker enhancements
- References: <20031212112448.GI12344@sunsite.ms.mff.cuni.cz> <87wu92xan5.fsf@egil.codesourcery.com> <20031212142914.GK12344@sunsite.ms.mff.cuni.cz> <20040317042418.GZ15900@bubble.modra.org> <20040317063116.GA6393@sunsite.ms.mff.cuni.cz> <20040317121149.GC15900@bubble.modra.org>
On Wed, Mar 17, 2004 at 10:41:49PM +1030, Alan Modra wrote:
> On Wed, Mar 17, 2004 at 07:31:16AM +0100, Jakub Jelinek wrote:
> > > One side-effect of this patch is that when --only-if-needed is in
> > > effect, weak definitions in normal files won't be overridden by
> > > a strong definition in a shared library. I'm not sure whether that's
> > > a bug or a feature..
> >
> > Only if the library is not included, or when it is actually needed as well?
>
> Potentially both cases. elf_link_add_object_symbols won't use a strong
> definition in the lib in preference to a weak definition in a regular
> file until some other definition is needed from the library. At that
> point, further weak definitions in regular objects will be overridden.
Do you have a testcase for that? I think the current linker will never
let any definition from a shared libray override a weak definition in
a regular file.
H.J.