These arguments are used by clang but until now, unrecognized by distcc.
Handle arguments needed to build Swift on MacOS
Kill stray space
Looks OK to me. The long line involving globs looks a little strange to my eye but I am not that familiar with Python. I would ideally like someone familiar with Python and Mac use to look things over before this gets merged in.
I can explain the glob, at least: "-F" introduces a "framework path." A framework is a bundle of related libraries (usually one) and headers under a single directory. Adding a framework path effectivaly adds all of its */Headers directories to the -I #include path.
Bump. Please, I don't like maintaining my own fork and permission to post these fixes back to the project was hard-won.
There have been no objections so I shall merge in your request.