From d9e8ef7f66cbe1352a6e3df9ed2a1d76b3813ff3 Mon Sep 17 00:00:00 2001
From: Augustin Cavalier <waddlesplash@gmail.com>
Date: Mon, 10 Apr 2023 11:50:33 -0400
Subject: [PATCH] threads.h: Fix value of ONCE_FLAG_INIT.

Fixes #18348.
---
 headers/posix/threads.h | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/headers/posix/threads.h b/headers/posix/threads.h
index 58658e5d68..f1aea87b81 100644
--- a/headers/posix/threads.h
+++ b/headers/posix/threads.h
@@ -63,7 +63,7 @@ enum {
 #if !defined(__cplusplus) || __cplusplus < 201103L
 #define	thread_local		_Thread_local
 #endif
-#define	ONCE_FLAG_INIT		{ 0 }
+#define	ONCE_FLAG_INIT		{ -1 }
 #define	TSS_DTOR_ITERATIONS	4
 
 #ifdef __cplusplus
@@ -89,8 +89,7 @@ int	thrd_create(thrd_t *thread, thrd_start_t, void *);
 thrd_t	thrd_current(void);
 int	thrd_detach(thrd_t);
 int	thrd_equal(thrd_t, thrd_t);
-_Noreturn void
-	thrd_exit(int);
+void thrd_exit(int) __attribute__((noreturn));
 int	thrd_join(thrd_t, int *);
 int	thrd_sleep(const struct timespec *, struct timespec *);
 void	thrd_yield(void);