[PATCH] Fix ia64 sys/ucontext.h

[Jakub Jelinek <jakub at redhat dot com>]

Hi!

#define _XOPEN_SOURCE 500
#include <signal.h>
#include <sys/ucontext.h>

does not work on ia64. The issue is that signal.h under these conditions
does not source bits/sigcontext.h.
Fixed thusly (the multiple inclusion guards are on most platforms inside
asm/sigcontext.h, so are not needed in bits/sigcontext.h):

2001-05-21  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h: Include
	bits/sigcontext.h instead of bits/sigstack.h.
	* sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h: Add
	multiple-inclusion guards.

--- libc/sysdeps/unix/sysv/linux/ia64/sys/ucontext.h.jj	Tue Mar 20 13:45:50 2001
+++ libc/sysdeps/unix/sysv/linux/ia64/sys/ucontext.h	Mon May 21 20:41:21 2001
@@ -22,7 +22,7 @@
 #include <features.h>
 #include <signal.h>
 
-#include <bits/sigstack.h>
+#include <bits/sigcontext.h>
 
 /*
  * These are here mostly for backwards compatibility with older Unices.
--- libc/sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h.jj	Tue Mar 20 13:45:50 2001
+++ libc/sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h	Mon May 21 20:52:12 2001
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996, 1997, 1998,2000 Free Software Foundation, Inc.
+/* Copyright (C) 1996, 1997, 1998, 2000, 2001 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jes Sorensen <jes@linuxcare.com>, July 2000
 
@@ -21,6 +21,9 @@
 # error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
 #endif
 
+#ifndef _BITS_SIGCONTEXT_H
+#define _BITS_SIGCONTEXT_H 1
+
 #include <asm/fpu.h>
 #include <bits/sigstack.h>
 
@@ -50,3 +53,5 @@ struct sigcontext
    * include the kernel headers here. */
   unsigned long int sc_mask;	/* signal mask to restore after handler returns */
 };
+
+#endif _BITS_SIGCONTEXT_H

	Jakub