pkg/50611: lang/python35: not linked to expat on OS X

[netbsd.org%yegle.net@localhost]

>Number:         50611
>Category:       pkg
>Synopsis:       lang/python35: not linked to expat on OS X
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jan 02 20:20:00 +0000 2016
>Originator:     yegle
>Release:        
>Organization:
>Environment:
>Description:
It looks like lang/python35 is not linked to textproc/expat on OS X:

$ otool -L pkg/bin/python3.5
pkg/bin/python3.5:
	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1256.14.0)
	/Users/yegle/pkg/lib/libpython3.5.dylib (compatibility version 3.5.0, current version 3.5.0)
	/Users/yegle/pkg/lib/libintl.8.dylib (compatibility version 10.0.0, current version 10.4.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1)

Which makes it impossible to create a venv because python failed to install pip:

$ python3.5 -m ensurepip
Traceback (most recent call last):
  File "/Users/yegle/pkg/lib/python3.5/runpy.py", line 170, in _run_module_as_main
    "__main__", mod_spec)
  File "/Users/yegle/pkg/lib/python3.5/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/Users/yegle/pkg/lib/python3.5/ensurepip/__main__.py", line 4, in <module>
    ensurepip._main()
  File "/Users/yegle/pkg/lib/python3.5/ensurepip/__init__.py", line 209, in _main
    default_pip=args.default_pip,
  File "/Users/yegle/pkg/lib/python3.5/ensurepip/__init__.py", line 116, in bootstrap
    _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
  File "/Users/yegle/pkg/lib/python3.5/ensurepip/__init__.py", line 40, in _run_pip
    import pip
  File "/var/folders/d0/xjvwlhwn6l7bqd3fcxp0l50h0000gn/T/tmpt0qphnv7/pip-7.1.2-py2.py3-none-any.whl/pip/__init__.py", line 13, in <module>
  File "/var/folders/d0/xjvwlhwn6l7bqd3fcxp0l50h0000gn/T/tmpt0qphnv7/pip-7.1.2-py2.py3-none-any.whl/pip/utils/__init__.py", line 23, in <module>
  File "/var/folders/d0/xjvwlhwn6l7bqd3fcxp0l50h0000gn/T/tmpt0qphnv7/pip-7.1.2-py2.py3-none-any.whl/pip/_vendor/pkg_resources/__init__.py", line 36, in <module>
  File "/Users/yegle/pkg/lib/python3.5/plistlib.py", line 65, in <module>
    from xml.parsers.expat import ParserCreate
  File "/Users/yegle/pkg/lib/python3.5/xml/parsers/expat.py", line 4, in <module>
    from pyexpat import *
ImportError: No module named 'pyexpat'

>How-To-Repeat:

>Fix: