[Python-Dev] Linux Python linking with G++?

[Ulrich Berning]

David Abrahams schrieb:

>Ulrich Berning <ulrich.berning at t-online.de> writes:
>
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>>If you build C++ extensions on HP-UX with aCC, Python must be compiled 
>>and linked as a C++ program. This is documented.
>>    
>>
>
>You mean dynamically loaded C++ extensions, or the kind that are
>linked into the Python executable?
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Dynamically loaded extensions, especially SIP/PyQt 
(http://www.riverbankcomputing.co.uk).

>I'm willing to believe almost anything about HP-UX.  Until recently,
>aCC was so broken as a C++ compiler that there was little point in
>trying to get Boost.Python to work on it, and I don't have much data
>for that system.
>
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I'm using the HP aC++ Compiler C.03.50 together with the patches 
PHSS_29483 and PHSS_30967 on HP-UX B.11.00 and had no problems to build 
Python (2.3.5), Qt, SIP and PyQt and all other extensions with it.

>>It will not work if Python is compiled and linked as a normal C
>>program (I have tried it).
>>    
>>
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>Even if you take out the use of C++ constructs in ccpython.cc?  I just
>need to check all the obvious angles.
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What do you mean? The only C++ construct in ccpython.cc is the extern 
"C" declaration of Py_Main() and this is necessary if a C++ program 
references symbols from a C library. HP says, that a C++ shared library 
or a C++ shared object can only be loaded by a C++ main program. I can't 
remember the error message/symptoms, but I tried to build Python using 
python.c and couldn't load any C++ extensions. Because I'm going on 
vacation for the next three weeks, I can't try anything on HP-UX at the 
moment.