Ugly hack for SGI IRIX 6.2. Apparently _POSIX_THREADS is defined even
when the pthread package is not installed. configure knows better, so
#undef _POSIX_THREADS when pthread.h does not exist.
diff --git a/Python/thread.c b/Python/thread.c
index ad7dd5c..2d04256 100644
--- a/Python/thread.c
+++ b/Python/thread.c
@@ -49,6 +49,12 @@
#include <unistd.h>
#endif
+#ifdef __sgi
+#ifndef HAVE_PTHREAD_H /* XXX Need to check in configure.in */
+#undef _POSIX_THREADS
+#endif
+#endif
+
#include "thread.h"
#ifdef __ksr__