Add golang-cross

This package is derived from meta-golang:
https://github.com/digitallumens/meta-golang.git
commit 3fa6c8af6b4762de2f4e6740e327a5a71c29e6e1

In the meta-golang version, golang depends on a gcc-cross that causes
conflicts with our toolchain. So the golang-cross recipe was extracted
and then the following changes were made to work in wrlinux:

- our TARGET_ARCH is x86-64, golang-cross wants amd64

- in the former recipe, compile fails because it can't find header files
  and libraries because --sysroot is dropped. So I redefined the target
  cc and target cxx as cc and cxx at the start of the compile rule since
  cc gets redefined in there somewhere.

Signed-off-by: Amy Fong <amy.fong@windriver.com>

recipes-devtools/go/golang-1.3.inc

@@ -0,0 +1,4 @@
+LICENSE = "BSD"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=591778525c869cdde0ab5a1bf283cd81"
+SRC_URI[md5sum] = "4b66d7249554181c314f139ea78920b1"
+SRC_URI[sha256sum] = "eb983e6c5b2b9838f482c5442b1ac1856f610f2b21f3c123b3fedb48ffc35382"

recipes-devtools/go/golang-cross.inc

@@ -0,0 +1,56 @@
+DESCRIPTION = "Go Programming Language Cross Compiler."
+HOMEPAGE = "golang.org"
+# DEPENDS = "virtual/${TARGET_PREFIX}gcc libgcc"
+DEPENDS = "libgcc"
+PROVIDES = "virtual/${TARGET_PREFIX}golang"
+SRC_URI = "http://golang.org/dl/go${PV}.src.tar.gz"
+S="${WORKDIR}/go"
+
+do_compile () {
+	export CC_FOR_TARGET="${CC}"
+	export CXX_FOR_TARGET="${CXX}"
+	# the above should set the right sysroot option, else...:
+	# export CGO_CFLAGS="--sysroot=${STAGING_DIR_HOST}"
+	# export CGO_LDFLAGS="--sysroot=${STAGING_DIR_HOST}"
+
+	export CC="${BUILD_CC}"
+	export GOROOT_FINAL="${libdir}/go"
+	export GOARCH="${TARGET_ARCH}"
+
+	# supported amd64, 386, arm
+	if [ "${TARGET_ARCH}" = "x86_64" ]; then
+		export GOARCH="amd64"
+	fi
+
+	if [ "${TARGET_ARCH}" = "arm" ]
+	then
+		if [ `echo ${TUNE_PKGARCH} | cut -c 1-7` = "cortexa" ]
+		then
+			echo GOARM 7
+			export GOARM="7"
+		fi
+	fi
+	export GOOS="linux"
+	export GO_GCFLAGS=""
+	export GO_LDFLAGS=""
+	export GO_CCFLAGS=""
+	export CGO_ENABLED="1"
+	#export CC_FOR_TARGET="${TARGET_SYS}-gcc"
+	#export CXX_FOR_TARGET="${TARGET_SYS}-g++"
+	echo GOARCH ${GOARCH}
+	echo CC_FOR_TARGET ${CC_FOR_TARGET}
+
+	cd src
+	sh -x ./make.bash
+}
+
+do_install () {
+	# Install the executables into build system
+	mkdir -p ${D}${bindir}
+	cp -a bin/go ${D}${bindir}/
+	mkdir -p ${D}${libdir}/go
+	cp -a pkg ${D}${libdir}/go/
+	cp -a include ${D}${libdir}/go/
+	cp -a api ${D}${libdir}/go/
+	cp -a src ${D}${libdir}/go/
+}

recipes-devtools/go/golang-cross_1.3.bb

@@ -0,0 +1,3 @@
+inherit cross
+require golang-cross.inc
+require golang-${PV}.inc