toolchain: add support of ARC architecture

This includes binutils, gcc, gdb and uClibc-ng.

Latest release of ARC gcc (as of today it is "arc-2015.06")
is based on upstream gcc 4.8.4.

Sources are available on GitHub, see:
https://github.com/foss-for-synopsys-dwc-arc-processors/gcc

Latest release of ARC binutils (as of today it is "arc-2015.06")
is based on upstream binutils 2.23.

Sources are available on GitHub, see:
https://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb/releases/tag/arc-2015.06

Latest release of ARC GDB (as of today this is "arc-2015.06-gdb")
is based on upstream gdb 7.9.1.

Sources are available on GitHub, see:
https://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb/releases/tag/arc-2015.06-gdb

Note that for binutils and gdb that come from unified git repository
(which is the case for upstream binutils/gdb today) we need to disable
building of gdb in binutils and binutils in gdb hence in binutils:
------>8------
--disable-sim
--disable-gdb
------>8------

and in gdb:
------>8------
--disable-binutils
--disable-ld
--disable-gas
------>8------

Also in gdb we disable sim because if the following breakage while
building with it:
------------>8------------
/usr/bin/env bash ./../common/genmloop.sh -shell /usr/bin/env bash \
        -mono -fast -pbb -switch sem5-switch.c \
        -cpu a5f -infile ./mloop5.in \
        -outfile-suffix 5
unknown option: bash
Makefile:699: recipe for target 'stamp-5mloop' failed
make[7]: *** [stamp-5mloop] Error 1
------------>8------------

Cc: Felix Fietkau <nbd@openwrt.org>
Cc: John Crispin <blogic@openwrt.org>
Cc: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

SVN-Revision: 47438

1 files changed, 22 insertions, 9 deletions

diff --git a/toolchain/gcc/common.mk b/toolchain/gcc/common.mk
index b33769ce50..5214765d6b 100644
--- a/toolchain/gcc/common.mk
+++ b/toolchain/gcc/common.mk
@@ -25,6 +25,19 @@ GCC_VERSION:=$(call qstrip,$(CONFIG_GCC_VERSION))
 PKG_VERSION:=$(firstword $(subst +, ,$(GCC_VERSION)))
 GCC_DIR:=$(PKG_NAME)-$(PKG_VERSION)
 
+PKG_SOURCE_URL:=@GNU/gcc/gcc-$(PKG_VERSION)
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
+
+ifeq ($(PKG_VERSION),4.6.3)
+  PKG_MD5SUM:=773092fe5194353b02bb0110052a972e
+endif
+ifeq ($(PKG_VERSION),4.8.0)
+  PKG_MD5SUM:=e6040024eb9e761c3bea348d1fa5abb0
+endif
+ifeq ($(PKG_VERSION),5.2.0)
+  PKG_MD5SUM:=a51bcfeb3da7dd4c623e27207ed43467
+endif
+
 ifeq ($(findstring linaro, $(CONFIG_GCC_VERSION)),linaro)
     LINARO_RELEASE:=
     ifeq ($(CONFIG_GCC_VERSION),"4.6-linaro")
@@ -49,16 +62,16 @@ ifeq ($(findstring linaro, $(CONFIG_GCC_VERSION)),linaro)
     PKG_SOURCE:=$(PKG_NAME)-linaro-$(PKG_REV).tar.$(PKG_COMP)
     GCC_DIR:=gcc-linaro-$(PKG_REV)
     HOST_BUILD_DIR:=$(BUILD_DIR_TOOLCHAIN)/$(GCC_DIR)
-else
-  PKG_SOURCE_URL:=@GNU/gcc/gcc-$(PKG_VERSION)
-  PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
+endif
 
-  ifeq ($(PKG_VERSION),4.8.0)
-    PKG_MD5SUM:=e6040024eb9e761c3bea348d1fa5abb0
-  endif
-  ifeq ($(PKG_VERSION),5.2.0)
-    PKG_MD5SUM:=a51bcfeb3da7dd4c623e27207ed43467
-  endif
+ifneq ($(CONFIG_GCC_VERSION_4_8_ARC),)
+    PKG_VERSION:=4.8.4
+    PKG_SOURCE_URL:=https://github.com/foss-for-synopsys-dwc-arc-processors/gcc/archive/arc-2015.06
+    PKG_SOURCE:=$(PKG_NAME)-$(GCC_VERSION).tar.gz
+    PKG_MD5SUM:=25007ebb02a5f6c32532b103bb5984a0
+    PKG_REV:=2015.06
+    GCC_DIR:=gcc-arc-$(PKG_REV)
+    HOST_BUILD_DIR = $(BUILD_DIR_HOST)/$(PKG_NAME)-$(GCC_VERSION)
 endif
 
 PATCH_DIR=../patches/$(GCC_VERSION)