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[PATCH] Fix sparc64 build

Hi!

sparc64 doesn't provide the pause syscall, so it is emulated
using sigsuspend.
The following adds __pause_nocancel, which is now required by
pthread_mutex_lock.c.

2006-08-09  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/unix/sysv/linux/sparc/sparc64/pause.c
	(__pause_nocancel): New function.

--- libc/sysdeps/unix/sysv/linux/sparc/sparc64/pause.c	14 Apr 2005 21:44:25 -0000	1.3
+++ libc/sysdeps/unix/sysv/linux/sparc/sparc64/pause.c	9 Aug 2006 19:32:11 -0000
@@ -1,5 +1,5 @@
 /* pause -- suspend the process until a signal arrives.  POSIX.1 version.
-   Copyright (C) 2003 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2006 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
@@ -44,4 +44,15 @@ __libc_pause (void)
 }
 weak_alias (__libc_pause, pause)
 
+int
+__pause_nocancel (void)
+{
+  sigset_t set;
+
+  __sigemptyset (&set);
+  INLINE_SYSCALL (rt_sigprocmask, 4, SIG_BLOCK, CHECK_SIGSET (NULL),
+		  CHECK_SIGSET_NULL_OK (&set), _NSIG / 8);
+  return INLINE_SYSCALL (rt_sigsuspend, 2, CHECK_SIGSET (&set), _NSIG / 8);
+}
+
 LIBC_CANCEL_HANDLED ();		/* sigsuspend handles our cancellation.  */

	Jakub
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