Re: g++ libstdc++ linker question.

[Andrew Haley <aph@redhat.com>]

On 05/02/2012 12:14 PM, F. Heitkamp wrote:
> On 04/30/12 13:47, Jonathan Wakely wrote:
>> On 30 April 2012 18:28, Jonathan Wakely<jwakely.gcc@gmail.com>  wrote:
>>> On 30 April 2012 13:39, F. Heitkamp wrote:
>>>
>> The matplotlib I use is built with:
>>
>> python setupegg.py build_ext \
>>    --rpath=/opt/gcc-4.4.3/lib64
>> python setupegg.py build
>> python setupegg.py install --user
>>
>> The --rpath option ensures the right libstdc++.so is found at runtime
>> (we have several installed).  That build works here, and is linked to
>> libstdc++.so.  Unfortunately it builds matplotlib as a python egg,
>> which is a very annoying package format.  I'd rather not install it
>> via egg, but have no experience doing so and can't suggest why your
>> build was not linked to libstdc++.
> 
> This last suggestion did not work for me.  I got the same undefined 
> symbol error.  My linux setup is a 64 bits kernel running on sort of a 
> hybrid 32/64 bits system.  By that I mean I have some 64 bits userland 
> along with the 32bits.  When I configure python programs using the usual 
> commands it comes back with arch x86_64.  Anyway I guess this is getting 
> off topic for this list now, but suggestions are welcome nonetheless.

We really need you to answer this question:

> Is _path.so a 32-bit or 64-bit library?  From the missing symbol I'm
> assuming 32-bit.

And if it is compiled 32-bit, we need to know why.

Andrew.