kubernetes: explicitly build for $TARGET_ARCH

'make all' uses 'uname' to select the build target, leading to compile failures like this:

| arm-angstrom-linux-gnueabi-gcc: error: unrecognized command line option '-m64'

After providing the proper arch to the makefile it will try to use a hardcoded compiler:

| # runtime/cgo
| exec: "arm-linux-gnueabihf-gcc": executable file not found in $PATH

Fix that up by removing all hardcoded 'CC' entries in golang.sh

Signed-off-by: Koen Kooi <koen.kooi@linaro.org>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>

recipes-containers/kubernetes/kubernetes/0001-hack-lib-golang.sh-use-CC-from-environment.patch

@@ -0,0 +1,40 @@
+From 9cbb2d523d481053d405ebac830c2074b00d3417 Mon Sep 17 00:00:00 2001
+From: Koen Kooi <koen.kooi@linaro.org>
+Date: Mon, 23 Jul 2018 15:28:02 +0200
+Subject: [PATCH] hack/lib/golang.sh: use CC from environment
+
+Toolchain tupples differs, especially when using vendor provides ones.
+
+Upstream-status: Inappropriate [embedded specific]
+Signed-off-by: Koen Kooi <koen.kooi@linaro.org>
+---
+ hack/lib/golang.sh | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/hack/lib/golang.sh b/hack/lib/golang.sh
+index c5d4634..563e2b4b 100755
+--- a/src/import/hack/lib/golang.sh
++++ b/src/import/hack/lib/golang.sh
+@@ -278,19 +278,15 @@ kube::golang::set_platform_envs() {
+     case "${platform}" in
+       "linux/arm")
+         export CGO_ENABLED=1
+-        export CC=arm-linux-gnueabihf-gcc
+         ;;
+       "linux/arm64")
+         export CGO_ENABLED=1
+-        export CC=aarch64-linux-gnu-gcc
+         ;;
+       "linux/ppc64le")
+         export CGO_ENABLED=1
+-        export CC=powerpc64le-linux-gnu-gcc
+         ;;
+       "linux/s390x")
+         export CGO_ENABLED=1
+-        export CC=s390x-linux-gnu-gcc
+         ;;
+     esac
+   fi
+-- 
+2.9.5
+

recipes-containers/kubernetes/kubernetes_git.bb

@@ -7,6 +7,7 @@ maintenance, and scaling of applications. \
 
 SRCREV_kubernetes = "210c9cd7e1782e9fe46938fe0368556f2166a528"
 SRC_URI = "git://github.com/kubernetes/kubernetes.git;branch=release-1.11;name=kubernetes \
+           file://0001-hack-lib-golang.sh-use-CC-from-environment.patch \
           "
 
 DEPENDS += "rsync-native \
@@ -46,6 +47,7 @@ inherit goarch
 
 do_compile() {
 	export GOARCH="${TARGET_GOARCH}"
+	export GOOS="${TARGET_GOOS}"
 	export GOROOT="${STAGING_LIBDIR_NATIVE}/${TARGET_SYS}/go"
 	export GOPATH="${S}/src/import:${S}/src/import/vendor"
 
@@ -72,7 +74,7 @@ do_compile() {
 
 	cd ${S}/src/import
 	# to limit what is built, use 'WHAT', i.e. make WHAT=cmd/kubelet
-	make all
+	make cross KUBE_BUILD_PLATFORMS=${GOOS}/${GOARCH}
 }
 
 do_install() {
@@ -82,7 +84,7 @@ do_install() {
 
     install -d ${D}${sysconfdir}/kubernetes/manifests/
 
-    install -m 755 -D ${S}/src/import/_output/bin/kube* ${D}/${bindir}
+    install -m 755 -D ${S}/src/import/_output/local/bin/${TARGET_GOOS}/${TARGET_GOARCH}/* ${D}/${bindir}
 
     install -m 0644 ${S}/src/import/build/debs/kubelet.service  ${D}${systemd_unitdir}/system/
     install -m 0644 ${S}/src/import/build/debs/10-kubeadm.conf  ${D}${systemd_unitdir}/system/kubelet.service.d/