Message 274627 - Python tracker

+1, thanks for working on this!

Two questions:

1. Should we check the system version of libffi and warn users (and probably use the bundled version for now) if it was older than 3.1?

2. I know this isn't directly a user-facing feature, but should we add a short note to Doc/whatsnew/3.6.rst? (we can probably mention that most of the Linux distributions already use --with-system-ffi.)