[Bug 201523] lang/python27 on raspberry B, _ctypes libffi sysv.S 'invalid instruction'

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201523

--- Comment #14 from Kubilay Kocak <koobs at FreeBSD.org> ---
Removing the option for LIBFFI is a workaround. It's preferable the root cause
is addressed. Since no-one addressed the reproduction/isolation questions in
comment 6 (the reason this is still an open issue), we can proceed as follows:

a) Add a BROKEN condition for LIBFFI=off & ARCH=foo||bar as we do for
LIBFFI/i386 currently, OR

b) Patch lang/python* portslocally referencing the upstream issues, eventually
resulting in the patch not being required once 3.3.x is released and Python no
longer bundles libffi (which they intend to do [1])

Option (b) is preferable (root cause fix), but in order to do that properly, we
need an answer to the following question:

Q) Is this a problem only on lang/python2.7 or on every version up to and
including lang/python35 (and the Python 3.6 port I intend to commit soon)

I'm happy to commit (a) in the meantime until we have that answer, but the
following is needed:

a) Confirmation is needed from those who are having the issue that this is a
acceptable response/resolution.

b) A list of all python port versions and all architectures which this has been
reported to be, would be, or are affected.

[1] http://bugs.python.org/issue28491

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