For those of you who don’t know, pymake is a GNUMake port written mostly by Ben Smedberg that actually makes the build process on windows (and potentially other platforms) significantly faster.
For a while now this process has been broken on m-c due to the libffi landing (Bug 550602).
The problem, we discovered, was due to the GNUMake “Old Style Suffix Rules” which pymake does not (yet) support.
Needless to say, with a quick turnaround by Mike Shaver (from when he heard I had a patch up) the issue is now fixed!
So, you all can now happily Build with Pymake (again)!