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Add multilib config for powerpc-xilinx-eabi

Add multilib configuration for powerpc-xilinx-eabi.
Tested with --target=powerpc-eabisim.


2009-04-22 Michael Eager <eager@eagercon.com>

        * config/rs6000/t-xilinx: New, multilib for Xilinx PPC with
        single/double precision FPU.
        * config.gcc: Replace t-ppcgas & t-ppccomm with t-xilinx for
        powerpc-xilinx-eabi.

--
Michael Eager	 eager@eagercon.com
1960 Park Blvd., Palo Alto, CA 94306  650-325-8077

Index: gcc/gcc/config/rs6000/t-xilinx
===================================================================
--- gcc/gcc/config/rs6000/t-xilinx	(revision 0)
+++ gcc/gcc/config/rs6000/t-xilinx	(revision 0)
@@ -0,0 +1,77 @@
+# Multilibs for Xilinx powerpc embedded ELF targets.
+#
+# Copyright (C) 2009 Free Software Foundation, Inc.
+# Contributed by Michael Eager, eager@eagercon.com
+#
+# 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/>.
+
+# These can't end up in shared libgcc
+LIB2FUNCS_STATIC_EXTRA = eabi.S
+
+eabi.S: $(srcdir)/config/rs6000/eabi.asm
+	cat $(srcdir)/config/rs6000/eabi.asm > eabi.S
+
+tramp.S: $(srcdir)/config/rs6000/tramp.asm
+	cat $(srcdir)/config/rs6000/tramp.asm > tramp.S
+
+# Switch synonyms
+MULTILIB_MATCHES        = mfpu?sp_lite=msingle-float mfpu?dp_lite=mdouble-float mfpu?dp_lite=mhard-float mfpu?sp_lite=mfpu?sp_full mfpu?dp_lite=mfpu?dp_full 
+
+MULTILIB_OPTIONS        = mfpu=sp_lite/mfpu=dp_lite 
+
+MULTILIB_DIRNAMES       = single double 
+
+MULTILIB_EXTRA_OPTS     = mno-eabi mstrict-align mno-relocatable-lib 
+
+EXTRA_MULTILIB_PARTS = crtbegin$(objext) crtend$(objext) \
+  crtbeginS$(objext) crtendS$(objext) crtbeginT$(objext) \
+  ecrti$(objext) ecrtn$(objext) ncrti$(objext) ncrtn$(objext) 
+
+# We build {e,n}crti.o and {e,n}crtn.o, which serve to add begin and
+# end labels to all of the special sections used when we link using gcc.
+
+# Assemble startup files.
+ecrti.S: $(srcdir)/config/rs6000/eabi-ci.asm
+	cat $(srcdir)/config/rs6000/eabi-ci.asm >ecrti.S
+
+ecrtn.S: $(srcdir)/config/rs6000/eabi-cn.asm
+	cat $(srcdir)/config/rs6000/eabi-cn.asm >ecrtn.S
+
+ncrti.S: $(srcdir)/config/rs6000/sol-ci.asm
+	cat $(srcdir)/config/rs6000/sol-ci.asm >ncrti.S
+
+ncrtn.S: $(srcdir)/config/rs6000/sol-cn.asm
+	cat $(srcdir)/config/rs6000/sol-cn.asm >ncrtn.S
+
+# Build multiple copies of ?crt{i,n}.o, one for each target switch.
+$(T)ecrti$(objext): ecrti.S
+	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -c ecrti.S -o $(T)ecrti$(objext)
+
+$(T)ecrtn$(objext): ecrtn.S
+	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -c ecrtn.S -o $(T)ecrtn$(objext)
+
+$(T)ncrti$(objext): ncrti.S
+	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -c ncrti.S -o $(T)ncrti$(objext)
+
+$(T)ncrtn$(objext): ncrtn.S
+	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -c ncrtn.S -o $(T)ncrtn$(objext)
+
+# It is important that crtbegin.o, etc., aren't surprised by stuff in .sdata.
+CRTSTUFF_T_CFLAGS = -msdata=none
+# Make sure crt*.o are built with -fPIC even if configured with 
+# --enable-shared --disable-multilib
+CRTSTUFF_T_CFLAGS_S = -fPIC -msdata=none
Index: gcc/config.gcc
===================================================================
--- gcc/config.gcc	(revision 146610)
+++ gcc/config.gcc	(working copy)
@@ -1795,7 +1795,7 @@
 powerpc-xilinx-eabi*)
 	tm_file="${tm_file} dbxelf.h elfos.h usegas.h svr4.h freebsd-spec.h newlib-stdint.h rs6000/sysv4.h rs6000/eabi.h rs6000/singlefp.h rs6000/xfpu.h rs6000/xilinx.h"
 	extra_options="${extra_options} rs6000/sysv4.opt"
-	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-ppcgas rs6000/t-ppccomm"
+	tmake_file="rs6000/t-fprules rs6000/t-fprules-fpbit rs6000/t-xilinx"
 	use_gcc_stdint=wrap
 	;;
 powerpc-*-eabi*)
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