arc: use synopsys toolchain, upstream not fully usable

target/config/Config.in.binutils

@@ -3,6 +3,7 @@
 
 choice
 prompt "Binutils version"
+default ADK_TOOLCHAIN_BINUTILS_ARC if ADK_TARGET_ARCH_ARC
 default ADK_TOOLCHAIN_BINUTILS_AVR32 if ADK_TARGET_ARCH_AVR32
 default ADK_TOOLCHAIN_BINUTILS_CSKY if ADK_TARGET_ARCH_CSKY
 default ADK_TOOLCHAIN_BINUTILS_NDS32 if ADK_TARGET_ARCH_NDS32
@@ -19,6 +20,7 @@ config ADK_TOOLCHAIN_BINUTILS_GIT
 
 config ADK_TOOLCHAIN_BINUTILS_2_30
 	bool "2.30"
+	depends on !ADK_TARGET_ARCH_ARC
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_CSKY
 	depends on !ADK_TARGET_ARCH_NDS32
@@ -34,6 +36,10 @@ config ADK_TOOLCHAIN_BINUTILS_2_28
 	depends on ADK_TARGET_CPU_SH_J2 \
 		|| (ADK_TARGET_ARCH_ARM && ADK_KERNEL_THUMB2_KERNEL && ADK_TARGET_OS_LINUX)
 
+config ADK_TOOLCHAIN_BINUTILS_ARC
+	bool "arc-2018.03-release"
+	depends on ADK_TARGET_ARCH_ARC
+
 config ADK_TOOLCHAIN_BINUTILS_NDS32
 	bool "2.24-nds32"
 	depends on ADK_TARGET_ARCH_NDS32

target/config/Config.in.compiler

@@ -29,6 +29,7 @@ config ADK_TOOLCHAIN_LLVM_VERSION
 choice
 prompt "GCC version"
 depends on ADK_BUILD_COMPILER_GCC
+default ADK_TOOLCHAIN_GCC_ARC if ADK_TARGET_ARCH_ARC
 default ADK_TOOLCHAIN_GCC_AVR32 if ADK_TARGET_ARCH_AVR32
 default ADK_TOOLCHAIN_GCC_CSKY if ADK_TARGET_ARCH_CSKY
 default ADK_TOOLCHAIN_GCC_METAG if ADK_TARGET_ARCH_METAG
@@ -48,6 +49,7 @@ config ADK_TOOLCHAIN_GCC_GIT
 
 config ADK_TOOLCHAIN_GCC_7
 	bool "7.3.0"
+	depends on !ADK_TARGET_ARCH_ARC
 	depends on !ADK_TARGET_ARCH_AVR32
 	depends on !ADK_TARGET_ARCH_CSKY
 	depends on !ADK_TARGET_ARCH_METAG
@@ -59,6 +61,10 @@ config ADK_TOOLCHAIN_GCC_6
         bool "6.3.0"
 	depends on ADK_TARGET_CPU_SH_J2
 
+config ADK_TOOLCHAIN_GCC_ARC
+	bool "arc-2018.03-release"
+	depends on ADK_TARGET_ARCH_ARC
+
 config ADK_TOOLCHAIN_GCC_AVR32
 	bool "4.4.7-avr32"
 	depends on ADK_TARGET_ARCH_AVR32

toolchain/binutils/Makefile.inc

@@ -23,6 +23,13 @@ PKG_HASH:=		cd717966fc761d840d451dbd58d44e1e5b92949d2073d75b73fccb476d772fcf
 PKG_SITES:=		${MASTER_SITE_GNU:=binutils/}
 DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.gz
 endif
+ifeq ($(ADK_TOOLCHAIN_BINUTILS_ARC),y)
+PKG_VERSION:=		arc-2018.03-eng007
+PKG_GIT:=		tag
+PKG_RELEASE:=		1
+PKG_SITES:=		https://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb.git
+DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.xz
+endif
 ifeq ($(ADK_TOOLCHAIN_BINUTILS_CSKY),y)
 PKG_VERSION:=		binutils-2_27-branch-csky
 PKG_GIT:=		branch

toolchain/gcc/Makefile.inc

@@ -18,6 +18,13 @@ PKG_RELEASE:=		1
 DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.gz
 LIBSTDCXXVER:=		22
 endif
+ifeq ($(ADK_TOOLCHAIN_GCC_ARC),y)
+PKG_VERSION:=		arc-2018.03-eng007
+PKG_GIT:=		tag
+PKG_SITES:=		https://github.com/foss-for-synopsys-dwc-arc-processors/gcc.git
+PKG_RELEASE:=		1
+DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.xz
+endif
 ifeq ($(ADK_TOOLCHAIN_GCC_AVR32),y)
 PKG_VERSION:=		4.4.7
 PKG_HASH:=		76ad7c433af1c798a1e116c4dfa8f5f794f0d32bff65f88c54dcd5e5d146fc32