compiled using the clang compiler

(merge from 3.2)

Fix issue 13370: Ensure that ctypes works on Mac OS X when Python is compiled using the clang compiler

fromlist of __import__ propagate.

The problem previously was that if something listed in fromlist didn't
exist then that's okay. The fix for that was too broad in terms of
catching ImportError.

The trick with the solution to this issue is that the proper
refactoring of import thanks to importlib doesn't allow for a way to
distinguish (portably) between an ImportError because finders couldn't
find a loader, or a loader raised the exception. In Python 3.4 the
hope is to introduce a new exception (e.g. ModuleNotFound) to make it
clean to differentiate why ImportError was raised.

will be removed in Python 4.0.

of source path to set_data() and make the new argument private until
possible API changes can be discussed more thoroughly in Python 3.4.

Patch by Chris Rebert.

Patch by Chris Rebert.

already one.

Patch by Dave Malcolm.

Closes #9374: add back now-unused module attributes; removing them is a backward compatibility issue, since they have a public-seeming name.

Patch by Vinay Sajip.

Fix by Colin Su.  Test by me, based on a test written by Petri Lehtinen.

Fix by Colin Su.  Test by me, based on a test written by Petri Lehtinen.

 Add input dependency on custom build step.