SF bug 1524317: configure --without-threads fails to build Moved the code for _PyThread_CurrentFrames() up, so it's no longer in a huge "#ifdef WITH_THREAD" block (I didn't realize it /was/ in one). Changed test_sys's test_current_frames() so it passes with or without thread supported compiled in. Note that test_sys fails when Python is compiled without threads, but for an unrelated reason (the old test_exit() fails with an indirect ImportError on the `thread` module). There are also other unrelated compilation failures without threads, in extension modules (like ctypes); at least the core compiles again. Do we really support --without-threads? If so, there are several problems remaining.