[issue7272] test_multiprocessing fails consistently with 'signal 12' on FreeBSD 6.2 buildbot.

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

Here's a patch that makes FreeBSD behave exactly as though HAVE_SEM_OPEN
is not defined, when semaphores aren't available.  On my FreeBSD 7.2
test system, it results in the multiprocessing module being built
(without the contents of semaphore.c), but the test is skipped, along
with a message indicating that semaphores don't work on that system.

I added an autoconf test for the sem_open failure, and reused the
already existing pyconfig.h variable HAVE_BROKEN_POSIX_SEMAPHORES.

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keywords: +patch
Added file: http://bugs.python.org/file15368/freebsd_multiprocessing.patch

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