Add missing function sigfillset.

libc/signal/Makefile

@@ -25,7 +25,8 @@ include $(TOPDIR)Rules.mak
 LIBC=$(TOPDIR)libc.a
 
 CSRC=bsd_sig.c raise.c sigblock.c siggtmsk.c sigjmp.c signal.c sigintr.c\
-	sigpause.c sigstmsk.c sigaddset.c sigdelset.c sigismem.c sigemptyset.c
+	sigpause.c sigstmsk.c sigaddset.c sigdelset.c sigismem.c \
+	sigemptyset.c sigfillset.c
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 
 OBJS=$(COBJS)

libc/signal/sigfillset.c

@@ -0,0 +1,37 @@
+/* Copyright (C) 1991, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <signal.h>
+#include <string.h>
+
+/* Set all signals in SET.  */
+int
+sigfillset (set)
+     sigset_t *set;
+{
+  if (set == NULL)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  memset (set, 0xff, sizeof (sigset_t));
+
+  return 0;
+}