From: jca <jca@openbsd.org>
Date: Fri, 17 Dec 2021 12:03:16 +0000 (+0000)
Subject: Declare pthread_atfork as weak to avoid a fatal error with LLVM 13
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=0b9027416dbe2d075117c785c315d9663c8d8c6f;p=openbsd

Declare pthread_atfork as weak to avoid a fatal error with LLVM 13

Fixes behavior with current clang, which marks the symbol as GLOBAL
instead of WEAK.  LLVM change: https://reviews.llvm.org/D90108
base-gcc is unaffected.  Keep asm(".weak") for gcc3 until a cleanup can
be tested there.

Initial diff from mortimer@, input and ok kettenis@, ok guenther@
---

diff --git a/lib/csu/crtbeginS.c b/lib/csu/crtbeginS.c
index a4a7cd19fce..cfaf7e40609 100644
--- a/lib/csu/crtbeginS.c
+++ b/lib/csu/crtbeginS.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: crtbeginS.c,v 1.20 2019/01/09 16:42:38 visa Exp $	*/
+/*	$OpenBSD: crtbeginS.c,v 1.21 2021/12/17 12:03:16 jca Exp $	*/
 /*	$NetBSD: crtbegin.c,v 1.1 1996/09/12 16:59:03 cgd Exp $	*/
 
 /*
@@ -83,6 +83,8 @@ asm(".hidden atexit");
  */
 int	_thread_atfork(void (*)(void), void (*)(void), void (*)(void), void *)
 	    __attribute__((weak));
+int	pthread_atfork(void (*)(void), void (*)(void), void (*)(void))
+	    __attribute__((weak));
 
 int
 pthread_atfork(void (*prep)(void), void (*parent)(void), void (*child)(void))