[MacPorts] #50821: Python: Fix building for strange architecture combinations

[MacPorts]

#50821: Python: Fix building for strange architecture combinations
--------------------------+--------------------------------
 Reporter:  land.apfel@…  |      Owner:  macports-tickets@…
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.3.4
 Keywords:                |       Port:  python27
--------------------------+--------------------------------
 When trying to build a version of Python for a set of architectures not
 listed in https://hg.python.org/cpython/file/2.7/Lib/_osx_support.py#l471,
 the build fails with

 {{{
   File
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_python27/python27/work/Python-2.7.11/Lib/_osx_support.py",
 line 485, in get_platform_osx
     "Don't know machine value for archs=%r" % (archs,))
 ValueError: Don't know machine value for archs=('ppc', 'ppc64')
 generate-posix-vars failed
 make: *** [pybuilddir.txt] Error 1
 }}}

 Upstream they appear to have good reasons to not extend the list of
 "machine values" (http://bugs.python.org/issue26487).

 I think that MacPorts should either restrict builds to architecture sets
 supported upstream or add a patch that generates machine values for all
 combinations (similar to http://bugs.python.org/file42073/patch-plat-ppc-
 fat.diff).


 PS: This problem probably affects all Python versions (not only python27).

-- 
Ticket URL: <https://trac.macports.org/ticket/50821>
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