Re: [PATCH] Fix non-IA32 build

[Ulrich Drepper <drepper at redhat dot com>]

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Jakub Jelinek wrote:

> Some __libc aliases were missing on various arches.

I'll look at it.


> I'm not sure if it is a good idea to export the new
> pthread wrappers @@GLIBC_2.3.1, because that will mean current programs/libs
> won't use the wrapped syscalls. IMHO it would be much better to export
> them at the versions they have in libc.so. select would be a slight problem,
> since it is usually select@@GLIBC_2.0, but on Alpha it is
> select@@GLIBC_2.1.

We cannot do this.  Since this means newly linked programs will have
references to select@GLIBC_2.0 in libpthread while there was no so
function in libpthread at that time.  The DSO version startup test will
not catch this and only a relocation will fail later on.  That's wrong.

It's not ideal to have the symbols with different versions but it's also
no big problem.  Old code so far survived without the wrappers (and
ideally their behavior shouldn't be changed).  New programs will find
the new definition and add a reference to it.  This is also the desired
behavior, we don't want the reference to fall back to the definition in
libc.

- -- 
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Ulrich Drepper \    ,-----------------'   \ Mountain View, CA 94041 USA
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