NPTL on ARM isseu with __aeabi_unwind_cpp_pr0

[Carmelo AMOROSO]

On 29/11/2011 17.05, Johannes Stezenbach wrote:
> Hi,
> 
> static linking on ARM with NPTL causes duplicate symbol
> errors for __aeabi_unwind_cpp_pr0.  I think it is
> both gcc and uClibc issue.
> 
> See also
> https://bugs.busybox.net/show_bug.cgi?id=4117
> 
> gcc version 4.6.2 20111004 (prerelease) (linaro version)
> uClibc-0.9.32 or git master
> 
> - gcc defines __aeabi_unwind_cpp_pr0/pr1/pr2
> - uClibc-0.9.32/libc/sysdeps/linux/arm/aeabi_unwind_cpp_pr1.c defines stubs,
>   the comment says "This routine will never actually be called."
> 
> I think the gcc versions of these functions must not be weak,
> but the uClibc stubs need to be weak, so that when linking
> statically the gcc versions will be used.
> 
> However, gcc makes __aeabi_unwind_cpp_pr1/pr2 weak, with the
> "weak" attr on __aeabi_unwind_cpp_pr0 left in a comment:
> http://bazaar.launchpad.net/~linaro-toolchain-dev/gcc-linaro/4.6/annotate/head:/gcc/config/arm/unwind-arm.c#L223
> 
> Confusing, isn't it?
> 
> 
> Johannes

I've posted a patch... it works for me. Comments ?

Carmelo

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