gcc-4.5: Fix cross-gcc build for 64 bit targets

Building gcc-cross-intermediate for x86_64
failed since the notion of multlib has changed
in oe-core. So we needed to sync 64bit hack
patch from oe-core/gcc-4.6 into meta-oe 4.5
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>

meta-oe/recipes-devtools/gcc/gcc-4.5.inc

@@ -14,7 +14,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=59530bdf33659b29e73d4adb9f9f6552 \
 
 
 PV = "4.5"
-PR = "r42"
+PR = "r43"
 
 # BINV should be incremented after updating to a revision
 # after a minor gcc release (e.g. 4.5.1 or 4.5.2) has been made

meta-oe/recipes-devtools/gcc/gcc-4.5/64bithack.patch

-By default gcc places 64 bit libs in a lib64 directory. This makes it use 
-"lib" instead.
+Upstream-Status: Inappropriate [embedded specific]
 
-RP 25/7/10
+GCC has internal multilib handling code but it assumes a very specific rigid directory
+layout. The build system implementation of multilib layout is very generic and allows
+complete customisation of the library directories.
 
-Index: gcc-4.5.0/gcc/config/i386/t-linux64
+This patch is a partial solution to allow any custom directories to be passed into gcc
+and handled correctly. It forces gcc to use the base_libdir (which is the current 
+directory, "."). We need to do this for each multilib that is configured as we don't
+know which compiler options may be being passed into the compiler. Since we have a compiler
+per mulitlib at this point that isn't an issue.
+
+The one problem is the target compiler is only going to work for the default multlilib at
+this point. Ideally we'd figure out which multilibs were being enabled with which paths
+and be able to patch these entries with a complete set of correct paths but this we
+don't have such code at this point. This is something the target gcc recipe should do 
+and override these platform defaults in its build config.
+
+RP 15/8/11
+
+Index: gcc-4_5-branch/gcc/config/i386/t-linux64
 ===================================================================
---- gcc-4.5.0.orig/gcc/config/i386/t-linux64	2010-08-10 15:47:42.000000000 +0100
-+++ gcc-4.5.0/gcc/config/i386/t-linux64	2010-08-10 15:47:47.000000000 +0100
+--- gcc-4_5-branch.orig/gcc/config/i386/t-linux64	2011-09-22 11:37:51.188913390 -0700
++++ gcc-4_5-branch/gcc/config/i386/t-linux64	2011-09-22 11:37:56.818913303 -0700
 @@ -24,8 +24,8 @@
  # MULTILIB_OSDIRNAMES according to what is found on the target.
  
  MULTILIB_OPTIONS = m64/m32
 -MULTILIB_DIRNAMES = 64 32 
 -MULTILIB_OSDIRNAMES = ../lib64 $(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)
-+MULTILIB_DIRNAMES = . 32 
-+MULTILIB_OSDIRNAMES = . $(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)
++MULTILIB_DIRNAMES = . .
++MULTILIB_OSDIRNAMES = ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir))
  
  LIBGCC = stmp-multilib
  INSTALL_LIBGCC = install-multilib
+Index: gcc-4_5-branch/gcc/config/mips/t-linux64
+===================================================================
+--- gcc-4_5-branch.orig/gcc/config/mips/t-linux64	2011-06-16 17:59:02.000000000 -0700
++++ gcc-4_5-branch/gcc/config/mips/t-linux64	2011-09-22 11:37:56.838913302 -0700
+@@ -17,8 +17,8 @@
+ # <http://www.gnu.org/licenses/>.
+ 
+ MULTILIB_OPTIONS = mabi=n32/mabi=32/mabi=64
+-MULTILIB_DIRNAMES = n32 32 64
+-MULTILIB_OSDIRNAMES = ../lib32 ../lib ../lib64
++MULTILIB_DIRNAMES = . . .
++MULTILIB_OSDIRNAMES = ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir))
+ 
+ EXTRA_MULTILIB_PARTS=crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o
+ 
+Index: gcc-4_5-branch/gcc/config/rs6000/t-linux64
+===================================================================
+--- gcc-4_5-branch.orig/gcc/config/rs6000/t-linux64	2011-06-16 17:58:58.000000000 -0700
++++ gcc-4_5-branch/gcc/config/rs6000/t-linux64	2011-09-22 11:37:56.838913302 -0700
+@@ -32,11 +32,11 @@ TARGET_LIBGCC2_CFLAGS += -mno-minimal-to
+ # MULTILIB_OSDIRNAMES according to what is found on the target.
+ 
+ MULTILIB_OPTIONS        = m64/m32 msoft-float
+-MULTILIB_DIRNAMES       = 64 32 nof
++MULTILIB_DIRNAMES       = . . .
+ MULTILIB_EXTRA_OPTS     = fPIC mstrict-align
+ MULTILIB_EXCEPTIONS     = m64/msoft-float
+ MULTILIB_EXCLUSIONS     = m64/!m32/msoft-float
+-MULTILIB_OSDIRNAMES	= ../lib64 $(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib) nof
++MULTILIB_OSDIRNAMES	= ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir))
+ MULTILIB_MATCHES        = $(MULTILIB_MATCHES_FLOAT)
+ 
+ softfp_wrap_start := '\#ifndef __powerpc64__'