Builing Python 2.6 on AIX 5.2

[Jesse Noller]

Thanks for posting this to the tracker mattias - as soon as I can
steal some time, I'll dig into it and see if I can get it teed up for
the patch release.

On Tue, Oct 7, 2008 at 6:24 AM, brasse <thebrasse at gmail.com> wrote:
> On Oct 6, 10:16 am, brasse <thebra... at gmail.com> wrote:
>> Hello!
>>
>> I am having some trouble building Python 2.6 on AIX. The steps I have
>> taken are:
>>
>> export PATH=/usr/bin/:/usr/vacpp/bin/
>> ./configure --with-gcc=xlc_r --with-cxx=xlC_r --disable-ipv6
>> make
>>
>> This is the error message I'm seeing:
>> ./Modules/ld_so_aix xlc_r -bI:Modules/python.exp build/
>> temp.aix-5.2-2.6/home/mabr/Python-2.6/Modules/_multiprocessing/
>> multiprocessing.o build/temp.aix-5.2-2.6/home/mabr/Python-2.6/Modules/
>> _multiprocessing/socket_connection.o build/temp.aix-5.2-2.6/home/mabr/
>> Python-2.6/Modules/_multiprocessing/semaphore.o -L/usr/local/lib -o
>> build/lib.aix-5.2-2.6/_multiprocessing.so
>> ld: 0711-317 ERROR: Undefined symbol: .sem_timedwait
>> ld: 0711-317 ERROR: Undefined symbol: .CMSG_SPACE
>> ld: 0711-317 ERROR: Undefined symbol: .CMSG_LEN
>> ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more
>> information.
>> *** WARNING: renaming "_multiprocessing" since importing it failed: No
>> such file or directory
>> error: No such file or directory
>> make: The error code from the last command is 1.
>>
>> Have someone on this list had similar problems? Am I missing some
>> libraries? The configure script runs without errors, I would have
>> expected some kind of error there if I was missing something.
>>
>> Regards,
>> Mattias
>
> OK. I have made some changes in the source that lets me build on AIX
> 5.2. I thought I could post the patch here and perhaps someone can
> tell me if I am on the wrong track or if this is an OK fix on AIX.
>
> Basically I have changed setup.py to define HAVE_SEM_TIMED_WAIT=0 on
> aix. I have also defined CMESG_SPACE and CMESG_LEN in terms of
> _CMSG_ALIGN (see http://homepage.mac.com/cjgibbons/rubyonaixhowto/x72.html)
> in multipocessing.c. (I realise that this breaks some other platforms,
> but right now I just need to build on AIX).
>
> Here is a patch:
>
> diff -Naur Python-2.6/Modules/_multiprocessing/multiprocessing.c
> Python-2.6-clean-patch/Modules/_multiprocessing/multiprocessing.c
> --- Python-2.6/Modules/_multiprocessing/multiprocessing.c
> 2008-06-14 00:38:33.000000000 +0200
> +++ Python-2.6-clean-patch/Modules/_multiprocessing/
> multiprocessing.c   2008-10-07 12:23:55.000000000 +0200
> @@ -8,6 +8,13 @@
>
>  #include "multiprocessing.h"
>
> +#ifndef CMSG_SPACE
> +#define CMSG_SPACE(len) (_CMSG_ALIGN(sizeof(struct cmsghdr)) +
> _CMSG_ALIGN(len))
> +#endif
> +#ifndef CMSG_LEN
> +#define CMSG_LEN(len) (_CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
> +#endif
> +
>  PyObject *create_win32_namespace(void);
>
>  PyObject *pickle_dumps, *pickle_loads, *pickle_protocol;
> diff -Naur Python-2.6/setup.py Python-2.6-clean-patch/setup.py
> --- Python-2.6/setup.py 2008-09-30 02:15:45.000000000 +0200
> +++ Python-2.6-clean-patch/setup.py     2008-10-07 12:23:34.000000000
> +0200
> @@ -1277,6 +1277,14 @@
>                 )
>             libraries = []
>
> +        elif platform.startswith('aix'):
> +            macros = dict(
> +                HAVE_SEM_OPEN=1,
> +                HAVE_SEM_TIMEDWAIT=0,
> +                HAVE_FD_TRANSFER=1
> +                )
> +            libraries = ['rt']
> +
>         else:                                   # Linux and other
> unices
>             macros = dict(
>                 HAVE_SEM_OPEN=1,
>
> Perhaps this should go to some other list?
>
> :.:: mattias
> --
> http://mail.python.org/mailman/listinfo/python-list
>