Hi,

    I recently developed small wrappers around some C libraries, which 
worked find under python2.4 + ctypes 1.0.1, but failed with python 2.5.
    After investigation, the problem is that for some reason, 
c_longlong, which was 8 bytes under python2.4, is 4 under python2.5. 
Also, importing c_int64 fails (not found error) under python2.5 (I 
replaced c_longlong with c_int64 since, the latter being a much easier 
to find error). All this with the dapper ubuntu package.
    The error is seemed to be because ubuntu python2.5 packages use a 
packaged libffi4 instead of the libffi furnished by ctypes, and as such, 
python2.5 is configured with the option --with-system-ffi.

    My questions are:
       - is this intended for c_longlong to be only 4 bytes in some 
cases ? (in ISO C99, my understanding was that long long was guaranteed 
to be at least 8 bytes)
       - is the lack of c_int64 of bug of ctypes, libffi, both ?
       - I try to understand where the problem lies, but I don't have 
much knowledge on python C Api, so I am a bit lost in the code of ctypes

    Thank you,

    David

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