docker: override GOROOT at build time

Usually $GOROOT is set by go tool, but if sstate is specified, $GOROOT
is set to the path in the first project. If docker is built in the
another project(with same SSTATE_DIR) later, and the first project is removed,
the following error will be seen:

| go: cannot find GOROOT directory:
/path/to/previous/project/bitbake_build/tmp/sysroots/x86_64-linux/usr/lib/x86_64-wrs-linux/go

This commit is overriding $GOROOT stored in the go tool in sstate cache,
making sure it is set to the correct path in current project.

See more information here: https://golang.org/doc/install#install

Signed-off-by: Yunguo Wei <yunguo.wei@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/recipes-containers/docker/docker_git.bb b/recipes-containers/docker/docker_git.bb
index 89a0aa43..46321b4b 100644
--- a/recipes-containers/docker/docker_git.bb
+++ b/recipes-containers/docker/docker_git.bb
@@ -79,6 +79,7 @@ do_compile() {
         mkdir -p .gopath/src/"$(dirname "${DOCKER_PKG}")"
         ln -sf ../../../.. .gopath/src/"${DOCKER_PKG}"
         export GOPATH="${S}/.gopath:${S}/vendor:${STAGING_DIR_TARGET}/${prefix}/local/go"
+        export GOROOT="${STAGING_DIR_NATIVE}/${nonarch_libdir}/${HOST_SYS}/go"
         cd -
 
         # Pass the needed cflags/ldflags so that cgo