Index: head/lib/libc/gen/Symbol.map
===================================================================
--- head/lib/libc/gen/Symbol.map
+++ head/lib/libc/gen/Symbol.map
@@ -6,6 +6,7 @@
 	__xuname;
 	pthread_atfork;
 	pthread_attr_destroy;
+	pthread_attr_get_np;
 	pthread_attr_getdetachstate;
 	pthread_attr_getguardsize;
 	pthread_attr_getinheritsched;
Index: head/lib/libc/gen/_pthread_stubs.c
===================================================================
--- head/lib/libc/gen/_pthread_stubs.c
+++ head/lib/libc/gen/_pthread_stubs.c
@@ -59,6 +59,7 @@
 static int		stub_fail(void);
 static int		stub_true(void);
 static void		stub_exit(void);
+static int		stub_esrch(void);
 
 #define	PJT_DUAL_ENTRY(entry)	\
 	(pthread_func_t)entry, (pthread_func_t)entry
@@ -131,6 +132,7 @@
 	[PJT_MUTEXATTR_GETROBUST] =	{PJT_DUAL_ENTRY(stub_zero)},
 	[PJT_MUTEXATTR_SETROBUST] =	{PJT_DUAL_ENTRY(stub_zero)},
 	[PJT_GETTHREADID_NP] =		{PJT_DUAL_ENTRY(stub_zero)},
+	[PJT_ATTR_GET_NP] =		{PJT_DUAL_ENTRY(stub_esrch)},
 };
 
 /*
@@ -288,6 +290,7 @@
     void *, void *)
 STUB_FUNC1(_pthread_cancel_enter, PJT_CANCEL_ENTER, void, int)
 STUB_FUNC1(_pthread_cancel_leave, PJT_CANCEL_LEAVE, void, int)
+STUB_FUNC2(pthread_attr_get_np, PJT_ATTR_GET_NP, int, pthread_t, pthread_attr_t *)
 
 static int
 stub_zero(void)
@@ -329,4 +332,10 @@
 stub_exit(void)
 {
 	exit(0);
+}
+
+static int
+stub_esrch(void)
+{
+	return (ESRCH);
 }
Index: head/lib/libc/include/libc_private.h
===================================================================
--- head/lib/libc/include/libc_private.h
+++ head/lib/libc/include/libc_private.h
@@ -177,6 +177,7 @@
 	PJT_MUTEXATTR_GETROBUST,
 	PJT_MUTEXATTR_SETROBUST,
 	PJT_GETTHREADID_NP,
+	PJT_ATTR_GET_NP,
 	PJT_MAX
 } pjt_index_t;
 
Index: head/lib/libthr/thread/thr_init.c
===================================================================
--- head/lib/libthr/thread/thr_init.c
+++ head/lib/libthr/thread/thr_init.c
@@ -271,6 +271,7 @@
 	[PJT_MUTEXATTR_GETROBUST] = {DUAL_ENTRY(_thr_mutexattr_getrobust)},
 	[PJT_MUTEXATTR_SETROBUST] = {DUAL_ENTRY(_thr_mutexattr_setrobust)},
 	[PJT_GETTHREADID_NP] = {DUAL_ENTRY(_thr_getthreadid_np)},
+	[PJT_ATTR_GET_NP] = {DUAL_ENTRY(_thr_attr_get_np)},
 };
 
 static int init_once = 0;