gcc-4.6: Migrate recipes from OE-Core

Remove linaro patches. If one needs to use linaro
modified gcc they should use meta-linaro

Signed-off-by: Khem Raj <raj.khem@gmail.com>

toolchain-layer/recipes-devtools/gcc/gcc-4.6/64bithack.patch

@@ -0,0 +1,68 @@
+Upstream-Status: Inappropriate [embedded specific]
+
+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.
+
+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_6-branch/gcc/config/i386/t-linux64
+===================================================================
+--- gcc-4_6-branch.orig/gcc/config/i386/t-linux64	2011-06-23 15:15:29.000000000 +0100
++++ gcc-4_6-branch/gcc/config/i386/t-linux64	2011-08-15 13:09:03.772415848 +0100
+@@ -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 $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)
++MULTILIB_DIRNAMES = . .
++MULTILIB_OSDIRNAMES = ../$(shell basename $(base_libdir)) ../$(shell basename $(base_libdir))
+ 
+ LIBGCC = stmp-multilib
+ INSTALL_LIBGCC = install-multilib
+Index: gcc-4_6-branch/gcc/config/mips/t-linux64
+===================================================================
+--- gcc-4_6-branch.orig/gcc/config/mips/t-linux64	2011-08-15 13:06:13.732415763 +0100
++++ gcc-4_6-branch/gcc/config/mips/t-linux64	2011-08-15 13:09:11.452419446 +0100
+@@ -17,8 +17,8 @@
+ # <http://www.gnu.org/licenses/>.
+ 
+ MULTILIB_OPTIONS = mabi=n32/mabi=32/mabi=64
+-MULTILIB_DIRNAMES = n32 32 64
+-MULTILIB_OSDIRNAMES = ../lib32 ../lib ../lib64
++MULTILIB_DIRNAMES = . . .
++MULTILIB_OSDIRNAMES = ../$(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_6-branch/gcc/config/rs6000/t-linux64
+===================================================================
+--- gcc-4_6-branch.orig/gcc/config/rs6000/t-linux64	2011-08-15 13:06:25.272415822 +0100
++++ gcc-4_6-branch/gcc/config/rs6000/t-linux64	2011-08-15 13:09:21.062415878 +0100
+@@ -32,11 +32,11 @@
+ # 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__'