python2.5 ctypes.c_longlong has wrong size (32 bits instead of 64)

[David Cournapeau]

Binary package hint: python2.5

I have recently checked some of my python+ctypes code on python2.5 to find it did not work. After quite some time, I found out that ctypes.c_longlong is 32 bits, whereas it should be 64 bits.

I checked on two different machines (both edgy on x86). To reproduce the result, just execute :

python2.5 -c "from ctypes import c_longlong, sizeof; print sizeof(c_longlong)"

It will prints 4 instead of 8.

A manually installed python prints 8, so there is a problem in the packaging somewhere. Note that this problem is not present in python2.4-ctypes. Also, and I guess this is related, ctypes.c_int64 is not available.

[David Cournapeau (david-ar)]

I've just reproduced the bug on my minimac (ppc) at home, also

[David Cournapeau (david-ar)]

After many different compilation of python2.5 from ubuntu packages and from original source (python.org), I managed to find the problem: the configuration option --with-system-ffi, which is used by the ubuntu package. If I use this option for original sources of python, I have the same problem.

I don't really understand how libffi is used, so I don't really know how to go further.

[Matthias Klose (doko)]

python2.5 2.5-5ubuntu1 is now configured without --with-system-ffi

[Daniel Albeseder (daniel-albeseder)]

Will this bug be fixed in edgy as well?