Allow users to specify "compiler" options
Created originally on Bitbucket by tych0 (Tycho Andersen)
Changesets for this Pull Request have not been imported, because it had been already declined on Bitbucket. Marked as closed by the import user.
It would really be ideal if cffi would parse pkgconfig entries to figure out what the right compiler flags were for each library (instead of just saying libraries=["pango"] and then also saying compiler_flags={'include_paths': [...]}), but this at least lets users specify any include paths they want.