Diagnosis and original patch by Florent Xicluna (flox).

an i386 based machine, but should only be active when compiling the x86 part of
the universal binary.

wrong parameter types.  Patch by Victor Stinner.

Issue #7457: added a read_pkg_file method to distutils.dist.DistributionMetadata so we can read back PKG-INFO files

file in the Lib/test directory, which might be read-only for the
user running the tests.

extensions with msvc9compiler.

in a Py_ssize_t, not an int.

Patch from James Henstridge.

access to the initgroups(3) C library call on Unix systems which implement
it.  Patch by Jean-Paul Calderone.

arithmetic.

is outside the allowed range.

multi-architecture build (in particular when the architectures don't share
a common pointer size).

Fixed the same issue for SIZEOF_PTHREAD_T.

(No update to the NEWS file because this is a bugfix for an as yet unreleased
feature)

Thanks Robert Collins