add cross compile for linux/ppc64le

[andrewhsu]

To support other arch as mentioned in #31

Signed-off-by: Andrew Hsu andrewhsu@docker.com

[dnephin]

needs a rebase to pickup circleci fixes

otherwise LGTM

[vdemeester]

LGTM 🦁

[dnephin]

I'm trying this out and I'm getting this error:

1 errors occurred:
--> linux/ppc64le error: exit status 2
Stderr: # github.com/docker/cli/vendor/github.com/docker/docker/pkg/term
vendor/github.com/docker/docker/pkg/term/term.go:53: undefined: tcget
vendor/github.com/docker/docker/pkg/term/term.go:62: undefined: tcset
vendor/github.com/docker/docker/pkg/term/term.go:71: undefined: tcget
vendor/github.com/docker/docker/pkg/term/term.go:84: undefined: tcset

I think we merged something in pkg/term recently

[tophj-ibm]

hmm... I can't recreate this on x86 or ppc64le, but this looks like the case where pkg/term/tc_linux_cgo.go (which re-definies tcget/tcset) isn't being built for ppc64le because CGO isn't enabled.

@tiborvass and I did fix an issue with this last week, maybe this just needs a rebase.

[dnephin]

To clarify, I saw the problem when I did a rebase. You can also see it on my branch in #78 if you enable it in linux-cross

[tophj-ibm]

Gotcha. I opened up moby/moby#33180 which should fix the underlying issue. (syscall is way outdated)

[dnephin]

replaced by #104