Add Alpha -relax option from specs to new alpha/elf.opt

[Joseph S. Myers]

In preparation for the driver only accepting options listed in .opt
files, and not other options that simply happen to match some spec,
this patch adds the -relax option present in ASM_SPEC in alpha/elf.h
and in LINK_SPEC in various alpha/*.h headers to a new
config/alpha/elf.opt.

Tested building cc1 and xgcc for crosses to: alpha-linux-gnu alpha-gnu
alpha-freebsd8 alpha-netbsd alpha-openbsd.  OK to commit?

2011-01-30  Joseph Myers  <joseph@codesourcery.com>

	* config/alpha/elf.opt: New.
	* config.gcc (alpha*-*-linux*, alpha*-*-gnu*, alpha*-*-freebsd*,
	alpha*-*-netbsd*, alpha*-*-openbsd*): Use alpha/elf.opt.

Index: gcc/config.gcc
===================================================================
--- gcc/config.gcc	(revision 169317)
+++ gcc/config.gcc	(working copy)
@@ -695,30 +695,34 @@ case ${target} in
 	;;
 alpha*-*-linux*)
 	tm_file="${tm_file} alpha/elf.h alpha/linux.h alpha/linux-elf.h glibc-stdint.h"
+	extra_options="${extra_options} alpha/elf.opt"
 	target_cpu_default="MASK_GAS"
 	tmake_file="${tmake_file} alpha/t-crtfm alpha/t-alpha alpha/t-ieee alpha/t-linux"
 	;;
 alpha*-*-gnu*)
 	tm_file="$tm_file alpha/elf.h alpha/linux.h alpha/linux-elf.h gnu.h glibc-stdint.h alpha/gnu.h"
+	extra_options="${extra_options} alpha/elf.opt"
 	target_cpu_default="MASK_GAS"
 	tmake_file="${tmake_file} alpha/t-crtfm alpha/t-alpha alpha/t-ieee"
 	;;
 alpha*-*-freebsd*)
 	tm_file="${tm_file} ${fbsd_tm_file} alpha/elf.h alpha/freebsd.h"
+	extra_options="${extra_options} alpha/elf.opt"
 	target_cpu_default="MASK_GAS"
 	tmake_file="${tmake_file} alpha/t-crtfm alpha/t-alpha alpha/t-ieee"
 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
 	;;
 alpha*-*-netbsd*)
 	tm_file="${tm_file} netbsd.h alpha/elf.h netbsd-elf.h alpha/netbsd.h"
-	extra_options="${extra_options} netbsd.opt netbsd-elf.opt"
+	extra_options="${extra_options} netbsd.opt netbsd-elf.opt \
+		       alpha/elf.opt"
 	target_cpu_default="MASK_GAS"
 	tmake_file="${tmake_file} alpha/t-alpha alpha/t-ieee"
 	;;
 alpha*-*-openbsd*)
 	tm_defines="${tm_defines} OBSD_HAS_DECLARE_FUNCTION_NAME OBSD_HAS_DECLARE_FUNCTION_SIZE OBSD_HAS_DECLARE_OBJECT"
 	tm_file="alpha/alpha.h alpha/elf.h openbsd.h openbsd-stdint.h alpha/openbsd.h openbsd-libpthread.h"
-	extra_options="${extra_options} openbsd.opt"
+	extra_options="${extra_options} openbsd.opt alpha/elf.opt"
 	# default x-alpha is only appropriate for dec-osf.
 	target_cpu_default="MASK_GAS"
 	tmake_file="${tmake_file} alpha/t-alpha alpha/t-ieee"
Index: gcc/config/alpha/elf.opt
===================================================================
--- gcc/config/alpha/elf.opt	(revision 0)
+++ gcc/config/alpha/elf.opt	(revision 0)
@@ -0,0 +1,30 @@
+; Alpha ELF options.
+
+; Copyright (C) 2011
+; Free Software Foundation, Inc.
+;
+; This file is part of GCC.
+;
+; GCC is free software; you can redistribute it and/or modify it under
+; the terms of the GNU General Public License as published by the Free
+; Software Foundation; either version 3, or (at your option) any later
+; version.
+;
+; GCC 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 General Public License
+; for more details.
+;
+; You should have received a copy of the GNU General Public License
+; along with GCC; see the file COPYING3.  If not see
+; <http://www.gnu.org/licenses/>.
+
+; See the GCC internals manual (options.texi) for a description of
+; this file's format.
+
+; Please try to keep this file in ASCII collating order.
+
+relax
+Driver
+
+; This comment is to ensure we retain the blank line above.

-- 
Joseph S. Myers
joseph@codesourcery.com