enable multilibs on powerpc64-apple-darwin

	* config/rs6000/darwin64.h: Update DARWIN_ARCH_SPEC.
	* config/rs6000/t-darwin64: New.
	* config.gcc (powerpc64-*-darwin*): Use darwin.opts, t-darwin64,
	build crt2.

From-SVN: r159817

gcc/ChangeLog

+2010-05-25 Iain Sandoe  <iains@gcc.gnu.org>
+
+	* config/rs6000/darwin64.h: Update DARWIN_ARCH_SPEC.
+	* config/rs6000/t-darwin64: New.
+	* config.gcc (powerpc64-*-darwin*): Use darwin.opts, t-darwin64,
+	build crt2.
+
 2010-05-25  Christian Borntraeger  <borntraeger@de.ibm.com>
 
 	PR 44203

gcc/config.gcc

@@ -1906,9 +1906,10 @@ powerpc-*-darwin*)
 	extra_headers=altivec.h
 	;;
 powerpc64-*-darwin*)
-	tm_file="${tm_file} ${cpu_type}/darwin8.h ${cpu_type}/darwin64.h"
 	extra_options="${extra_options} ${cpu_type}/darwin.opt"
-	# We're omitting t-darwin8 to avoid building any multilibs
+	extra_parts="crt2.o"
+	tmake_file="t-darwin ${cpu_type}/t-darwin ${cpu_type}/t-darwin64 t-slibgcc-darwin"
+	tm_file="${tm_file} ${cpu_type}/darwin8.h ${cpu_type}/darwin64.h"
 	lto_binary_reader=lto-macho
 	extra_headers=altivec.h
 	;;

gcc/config/rs6000/darwin64.h

@@ -26,7 +26,7 @@
 			| MASK_MULTIPLE	| MASK_NEW_MNEMONICS | MASK_PPC_GFXOPT)
 
 #undef DARWIN_ARCH_SPEC
-#define DARWIN_ARCH_SPEC "ppc64"
+#define DARWIN_ARCH_SPEC "%{m32:ppc;:ppc64}"
 
 #undef DARWIN_SUBARCH_SPEC
 #define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC

gcc/config/rs6000/t-darwin64

+LIB2_SIDITI_CONV_FUNCS=yes
+
+LIB2FUNCS_EXTRA = $(srcdir)/config/rs6000/darwin-tramp.asm \
+	$(srcdir)/config/darwin-64.c \
+	$(srcdir)/config/rs6000/darwin-ldouble.c \
+	$(srcdir)/config/rs6000/darwin-world.asm
+
+MULTILIB_OPTIONS = m32
+MULTILIB_DIRNAMES = ppc
+
+#LIBGCC = stmp-multilib
+#INSTALL_LIBGCC = install-multilib