The <bits/sigthread.h> header is included by <signal.h>, not <pthread.h>.
+2017-02-28 Andreas Schwab <schwab@linux-m68k.org>
+
+ * bits/sigthread.h: Refer to <signal.h>, not <pthread.h>.
+ * sysdeps/pthread/bits/sigthread.h: Likewise.
+
2017-02-27 Florian Weimer <fweimer@redhat.com>
[BZ #21115]
#define _BITS_SIGTHREAD_H 1
#if !defined _SIGNAL_H && !defined _PTHREAD_H
-# error "Never include this file directly. Use <pthread.h> instead"
+# error "Never include this file directly. Use <signal.h> instead"
#endif
/* Modify the signal mask for the calling thread. The arguments have the
#define _BITS_SIGTHREAD_H 1
#if !defined _SIGNAL_H && !defined _PTHREAD_H
-# error "Never include this file directly. Use <pthread.h> instead"
+# error "Never include this file directly. Use <signal.h> instead"
#endif
/* Functions for handling signals. */