# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1518859415 -3600
# Node ID ef22bb0a95915d701ef29d380dd16ca4fbeb61bf
# Parent  f6cb783d3822a496077da8252e8a1baf193007a3
lock: Fix test-once1 crash on FreeBSD11.

* lib/glthread/lock.h: On FreeBSD, test the weak value of the symbol
'pthread_create', not 'pthread_cancel'.

diff -r f6cb783d3822 -r ef22bb0a9591 ChangeLog
--- a/ChangeLog	Sat Feb 17 10:05:01 2018 +0100
+++ b/ChangeLog	Sat Feb 17 10:23:35 2018 +0100
@@ -1,3 +1,9 @@
+2018-02-17  Bruno Haible  <bruno@clisp.org>
+
+	lock: Fix test-once1 crash on FreeBSD11.
+	* lib/glthread/lock.h: On FreeBSD, test the weak value of the symbol
+	'pthread_create', not 'pthread_cancel'.
+
 2018-02-17  Bruno Haible  <bruno@clisp.org>
 
 	lock: Add test of gl_once.
diff -r f6cb783d3822 -r ef22bb0a9591 lib/glthread/lock.h
--- a/lib/glthread/lock.h	Sat Feb 17 10:05:01 2018 +0100
+++ b/lib/glthread/lock.h	Sat Feb 17 10:23:35 2018 +0100
@@ -149,8 +149,18 @@
 #  endif
 
 #  if !PTHREAD_IN_USE_DETECTION_HARD
-#   pragma weak pthread_cancel
-#   define pthread_in_use() (pthread_cancel != NULL)
+    /* On most platforms, pthread_cancel or pthread_kill can be used to
+       determine whether libpthread is in use.
+       On newer versions of FreeBSD, however, this is no longer possible,
+       because pthread_cancel and pthread_kill got added to libc.  Therefore
+       use pthread_create to test whether libpthread is in use.  */
+#   if defined __FreeBSD__ || defined __DragonFly__ /* FreeBSD */
+#    pragma weak pthread_create
+#    define pthread_in_use() (pthread_create != NULL)
+#   else /* glibc, NetBSD, OpenBSD, IRIX, OSF/1, Solaris */
+#    pragma weak pthread_cancel
+#    define pthread_in_use() (pthread_cancel != NULL)
+#   endif
 #  endif
 
 # else