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

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

1 files changed, 50 insertions, 0 deletions

diff --git a/meta/recipes-devtools/go/go-1.8/fix-cc-handling.patch b/meta/recipes-devtools/go/go-1.8/fix-cc-handling.patch
new file mode 100644
index 0000000000..dc9b811b2a
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.8/fix-cc-handling.patch
@@ -0,0 +1,50 @@
+Accept CC with multiple words in its name
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Upstream-Status: Pending
+Index: go/src/cmd/go/build.go
+===================================================================
+--- go.orig/src/cmd/go/build.go
++++ go/src/cmd/go/build.go
+@@ -3100,12 +3100,24 @@ func (b *builder) gccCmd(objdir string)
+ 	return b.ccompilerCmd("CC", defaultCC, objdir)
+ }
+ 
++// gccCmd returns a gcc command line prefix
++// defaultCC is defined in zdefaultcc.go, written by cmd/dist.
++func (b *builder) gccCmdForReal() []string {
++	return envList("CC", defaultCC)
++}
++
+ // gxxCmd returns a g++ command line prefix
+ // defaultCXX is defined in zdefaultcc.go, written by cmd/dist.
+ func (b *builder) gxxCmd(objdir string) []string {
+ 	return b.ccompilerCmd("CXX", defaultCXX, objdir)
+ }
+ 
++// gxxCmd returns a g++ command line prefix
++// defaultCXX is defined in zdefaultcc.go, written by cmd/dist.
++func (b *builder) gxxCmdForReal() []string {
++	return envList("CXX", defaultCXX)
++}
++
+ // gfortranCmd returns a gfortran command line prefix.
+ func (b *builder) gfortranCmd(objdir string) []string {
+ 	return b.ccompilerCmd("FC", "gfortran", objdir)
+Index: go/src/cmd/go/env.go
+===================================================================
+--- go.orig/src/cmd/go/env.go
++++ go/src/cmd/go/env.go
+@@ -63,10 +63,9 @@ func mkEnv() []envVar {
+ 	}
+ 
+ 	cmd := b.gccCmd(".")
+-	env = append(env, envVar{"CC", cmd[0]})
++	env = append(env, envVar{"CC", strings.Join(b.gccCmdForReal(), " ")})
+ 	env = append(env, envVar{"GOGCCFLAGS", strings.Join(cmd[3:], " ")})
+-	cmd = b.gxxCmd(".")
+-	env = append(env, envVar{"CXX", cmd[0]})
++	env = append(env, envVar{"CXX", strings.Join(b.gxxCmdForReal(), " ")})
+ 
+ 	if buildContext.CgoEnabled {
+ 		env = append(env, envVar{"CGO_ENABLED", "1"})