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Re: objcopy --weaken
- From: "Peter S. Mazinger" <ps dot m at gmx dot net>
- To: Daniel Jacobowitz <drow at false dot org>
- Cc: binutils at sourceware dot org
- Date: Wed, 12 Apr 2006 01:56:50 +0200 (CEST)
- Subject: Re: objcopy --weaken
On Tue, 11 Apr 2006, Daniel Jacobowitz wrote:
> On Wed, Apr 12, 2006 at 01:05:48AM +0200, Peter S. Mazinger wrote:
> > Hello!
> >
> > The objcopy --weaken command suggests that it is able to change all
> > (global) symbols to weak. Running it against an object file it does it,
> > but running it against a shared lib does not change anything.
>
> What do you expect it to do?
I would have expected to change all global(strong) to weak.
> In modern shared library lookup, dynamic exported symbols are the same
> whether they are strong or weak.
That is true if modern=glibc (there is though some compat
option/environment setting to disable this behaviour).
At link time if libpthread.so and libc.so provide the same symbol (could
happen w/ any other 2 libs, the example is "real-life", the linker fails,
if one of them is not weak.
Peter
--
Peter S. Mazinger <ps dot m at gmx dot net> ID: 0xA5F059F2
Key fingerprint = 92A4 31E1 56BC 3D5A 2D08 BB6E C389 975E A5F0 59F2