go: Add recipes for golang compilers and tools

* This is converging the recipes for go from
  meta-virtualization and oe-meta-go

* Add recipes for go 1.7

* go.bbclass is added to ease out writing
  recipes for go packages

* go-examples: Add an example, helloworld written in go
  This should serve as temlate for writing go recipes

* Disable for musl, at least for now

* Disable for x32/ppc32 which is not supported

(From OE-Core rev: 78615e9260fb5d6569de4883521b049717fa4340)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/meta/recipes-devtools/go/go-1.6/split-host-and-target-build.patch b/meta/recipes-devtools/go/go-1.6/split-host-and-target-build.patch
new file mode 100644
index 0000000000..afbae02b4e
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.6/split-host-and-target-build.patch
@@ -0,0 +1,63 @@
+Add new option --target-only to build target components
+Separates the host and target pieces of build
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Upstream-Status: Pending
+Index: go/src/make.bash
+===================================================================
+--- go.orig/src/make.bash
++++ go/src/make.bash
+@@ -143,12 +143,23 @@ if [ "$1" = "--no-clean" ]; then
+        buildall=""
+        shift
+ fi
+-./cmd/dist/dist bootstrap $buildall $GO_DISTFLAGS -v # builds go_bootstrap
+-# Delay move of dist tool to now, because bootstrap may clear tool directory.
+-mv cmd/dist/dist "$GOTOOLDIR"/dist
+-echo
+ 
+-if [ "$GOHOSTARCH" != "$GOARCH" -o "$GOHOSTOS" != "$GOOS" ]; then
++do_host_build="yes"
++do_target_build="yes"
++if [ "$1" = "--target-only" ]; then
++       do_host_build="no"
++       shift
++elif [ "$1" = "--host-only" ]; then
++       do_target_build="no"
++       shift
++fi
++
++if [ "$do_host_build" = "yes" ]; then
++       ./cmd/dist/dist bootstrap $buildall $GO_DISTFLAGS -v # builds go_bootstrap
++       # Delay move of dist tool to now, because bootstrap may clear tool directory.
++       mv cmd/dist/dist "$GOTOOLDIR"/dist
++       echo
++
+        echo "##### Building packages and commands for host, $GOHOSTOS/$GOHOSTARCH."
+        # CC_FOR_TARGET is recorded as the default compiler for the go tool. When building for the host, however,
+        # use the host compiler, CC, from `cmd/dist/dist env` instead.
+@@ -157,11 +168,20 @@ if [ "$GOHOSTARCH" != "$GOARCH" -o "$GOH
+        echo
+ fi
+ 
+-echo "##### Building packages and commands for $GOOS/$GOARCH."
+-CC="$CC_FOR_TARGET" "$GOTOOLDIR"/go_bootstrap install $GO_FLAGS -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v std cmd
+-echo
++if [ "$do_target_build" = "yes" ]; then
++    GO_INSTALL="${GO_TARGET_INSTALL:-std cmd}"
++    echo "##### Building packages and commands for $GOOS/$GOARCH."
++    if [ "$GOHOSTOS" = "$GOOS" -a "$GOHOSTARCH" = "$GOARCH" -a "$do_host_build" = "yes" ]; then
++       rm -rf ./host-tools
++       mkdir ./host-tools
++       mv "$GOTOOLDIR"/* ./host-tools
++       GOTOOLDIR="$PWD/host-tools"
++    fi
++    GOTOOLDIR="$GOTOOLDIR" CC="$CC_FOR_TARGET" "$GOTOOLDIR"/go_bootstrap install $GO_FLAGS -gcflags "$GO_GCFLAGS" -ldflags "$GO_LDFLAGS" -v ${GO_INSTALL}
++    echo
+ 
+-rm -f "$GOTOOLDIR"/go_bootstrap
++    rm -f "$GOTOOLDIR"/go_bootstrap
++fi
+ 
+ if [ "$1" != "--no-banner" ]; then
+        "$GOTOOLDIR"/dist banner