From 8b8fb3db5a3dd7f2d2111d493f9dc94fff234eaa Mon Sep 17 00:00:00 2001
From: =?utf8?q?Martin=20v=2E=20L=C3=B6wis?= <martin@v.loewis.de>
Date: Mon, 28 Mar 2005 12:34:20 +0000
Subject: [PATCH] Add 0 to _POSIX_SEMAPHORES. Will backport to 2.4.

---
 Python/thread_pthread.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Python/thread_pthread.h b/Python/thread_pthread.h
index d754005023..a415a434be 100644
--- a/Python/thread_pthread.h
+++ b/Python/thread_pthread.h
@@ -16,7 +16,9 @@
    family of functions must indicate this by defining
    _POSIX_SEMAPHORES. */   
 #ifdef _POSIX_SEMAPHORES
-#if _POSIX_SEMAPHORES == -1
+/* On FreeBSD 4.x, _POSIX_SEMAPHORES is defined empty, so 
+   we need to add 0 to make it work there as well. */
+#if (_POSIX_SEMAPHORES+0) == -1
 #define HAVE_BROKEN_POSIX_SEMAPHORES
 #else
 #include <semaphore.h>
-- 
2.40.0