Donn Cave <donn@u.washington.edu>:

Do not assume that all platforms using a MetroWorks compiler can use
POSIX threads; the assumption breaks on BeOS.  This fix only helps
for BeOS.

This closes SourceForge patch #101772.

Python/thread.c

@@ -58,7 +58,7 @@ extern char *getenv(const char *);
 #define SUN_LWP
 #endif
 
-#ifdef __MWERKS__
+#if defined(__MWERKS__) && !defined(__BEOS__)
 #define _POSIX_THREADS
 #endif