[Bug ld/19073] S/390: ld: Segmentation fault building Glibc

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=19073

--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Andreas Krebbel from comment #13)
> > There is a bug in sysdeps/unix/sysv/linux/s390/s390-64/getcontext.S
> > which defines both getcontext@@GLIBC_2.2 and getcontext.  But linker
> > shouldn't crash.
> 
> I agree that this does not look correct but it is similiar to e.g. setjmp on
> x86_64:
> 
> readelf -s libc.so.6 | grep " setjmp"
>    622: 0000000000032ce0    10 FUNC    GLOBAL DEFAULT   13
> setjmp@@GLIBC_2.2.5
>   6015: 0000000000032ce0    10 FUNC    GLOBAL DEFAULT   13 setjmp

This is expected.

> One difference appears to be that the symbol without version information is
> weak on s390.

I was referring to the input object files, not output shared libraries.
There is no need to define both getcontext@@GLIBC_2.2 and getcontext in
sysdeps/unix/sysv/linux/s390/s390-64/getcontext.S.

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