In _PR_InitThreads, call pthread_init to explicitly initialize the

pthread subsystem on BSD/OS because pthread_self() fails to initialize
pthreads implicitly.  This patch is contributed by Bert Driehuis
<bert_driehuis@nl.compuware.com>.

nsprpub/config/BSD_OS.mk

@@ -32,6 +32,7 @@ RANLIB		= ranlib
 
 ifeq ($(USE_PTHREADS),1)
 IMPL_STRATEGY = _PTH
+DEFINES		+= -D_PR_NEED_PTHREAD_INIT
 else
 IMPL_STRATEGY = _EMU
 DEFINES		+= -D_PR_LOCAL_THREADS_ONLY

nsprpub/pr/src/pthreads/ptthread.c

@@ -745,6 +745,17 @@ void _PR_InitThreads(
     int rv;
     PRThread *thred;
 
+#ifdef _PR_NEED_PTHREAD_INIT
+    /*
+     * On BSD/OS (3.1 and 4.0), the pthread subsystem is lazily
+     * initialized, but pthread_self() fails to initialize
+     * pthreads and hence returns a null thread ID if invoked
+     * by the primordial thread before any other pthread call.
+     * So we explicitly initialize pthreads here.
+     */
+    pthread_init();
+#endif
+
 #if defined(_PR_DCETHREADS) || defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
     /*
     ** These might be function evaluations