Split sys/param.h out into common file and sysdeps bits/param.h file.

sysdeps/unix/sysv/linux/bits/param.h

@@ -0,0 +1,42 @@
+/* Old-style Unix parameters and limits.  Linux version.
+   Copyright (C) 1995-2012 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SYS_PARAM_H
+# error "Never use <bits/param.h> directly; include <sys/param.h> instead."
+#endif
+
+#ifndef ARG_MAX
+# define __undef_ARG_MAX
+#endif
+
+#include <linux/limits.h>
+#include <linux/param.h>
+
+/* The kernel headers define ARG_MAX.  The value is wrong, though.  */
+#ifdef __undef_ARG_MAX
+# undef ARG_MAX
+# undef __undef_ARG_MAX
+#endif
+
+#define	MAXSYMLINKS	20
+
+/* The following are not really correct but it is a value we used for a
+   long time and which seems to be usable.  People should not use NOFILE
+   and NCARGS anyway.  */
+#define NOFILE		256
+#define	NCARGS		131072