FYI: building python packages in chroot environment on linux

[Aleksej Saushev <asau%inbox.ru@localhost>]

  Hello!

When building packages in a chroot environment on linux, I have found
that parallel/py-billiard fails in semaphore code. The problem is caused
by broken python27 package: in absence of /dev/shm python's build system
misdetects semaphore support as missing or broken.

You can check, if you have hit this problem, by looking into
include/python2.7/pyconfig.h
In problematic case you see the following definitions:

  #define HAVE_BROKEN_SEM_GETVALUE 1
  #define POSIX_SEMAPHORES_NOT_ENABLED 1

The solution is to mount /dev/shm, e.g.:

  mount -t tmpfs -o rw,nosuid,nodev tmpfs ${jail}/dev/shm

and rebuild lang/python27 with everything that depends on it.


-- 
HE CE3OH...