Re: missing symbols in libstdc++.so.6 built from the 4.9 branch

[Ramana Radhakrishnan <ramana dot radhakrishnan at arm dot com>]

On 01/07/14 09:40, Matthias Klose wrote:
> on some linux architectures there are some symbols missing in libstdc++.so.6
> built from the 4.9 branch.  I didn't notice before due to a packaging bug.
> affected are ARM32, HPPA, SPARC.
>
>   - ARM32 (build log [1], both soft and hard float) are missing
>       __aeabi_atexit@CXXABI_ARM_1.3.3
>       __aeabi_vec_*
>
>     Can these be ignored?

__aeabi_atexit is the function to be used instead of __cxa_atexit for 
the arm-none-linux-gnueabi(hf) targets as well as arm-none-eabi.

Grokking around libstdc++-v3 I would have expected 
config/os/gnu-linux/arm-eabi-extra.ver to have added these symbols in 
and I'm not sure what's going on here. So prima-facie this is a bug. I 
wonder if something's broken in the handling of 
port_specific_symbol_files for arm.


regards
Ramana


>   - HPPA (build log [2]), is missing all the future_base symbols and
>     exception_ptr13exception symbols, current_exception and
>     rethrow_exception.
>
>   - SPARC (build log [3]) configured for sparc64-linux-gnu is missing
>     symbols in the 32bit multilib build, although these are present
>     in a sparc-linux-gnu build. Missing are same ones as in the HPPA
>     build, long double 128 related symbols, numeric_limits, and some
>     math symbols.
>
>     Looks like more than one issue is involved, I remember that the
>     math symbols were already dropped in earlier versions for other
>     architectures. The build is configured -with-long-double-128.
>
> Matthias
>
> [1]
> https://buildd.debian.org/status/fetch.php?pkg=gcc-4.9&arch=armhf&ver=4.9.0-8&stamp=1403809654
> [2]
> http://buildd.debian-ports.org/status/fetch.php?pkg=gcc-4.9&arch=hppa&ver=4.9.0-9&stamp=1404018503
> [3]
> http://buildd.debian-ports.org/status/fetch.php?pkg=gcc-4.9&arch=sparc64&ver=4.9.0-9&stamp=1404033854