Compiling against ARM fails

[leipert]

I am trying to cross-compile for my raspberry pi (see here keybase/client#2938).

env GOOS=linux GOARCH=arm GOARM=5 GO15VENDOREXPERIMENT=1 \
> go build -tags production github.com/keybase/client/go/keybase

returns

# github.com/keybase/client/go/vendor/github.com/keybase/go-framed-msgpack-rpc/rpc/resinit
src/github.com/keybase/client/go/vendor/github.com/keybase/go-framed-msgpack-rpc/rpc/resinit/resinit.go:17:3: undefined: resInit

Do you have any idea how to fix this?

[jzila]

You can add -tags noresinit and it should work.

[jzila]

@oconnor663: should we add a !arm to https://github.com/keybase/go-framed-msgpack-rpc/blob/c416da7cf9cfb85545098e346be6583a1649b0d5/rpc/resinit/resinit_linux.go?

[oconnor663]

I believe you need to export CGO_ENABLED=1 when cross-compiling. The Go language decides that CGO should be silently disabled by default for cross platform builds, and the result is missing symbols in cases where CGO would've provided them. Maybe we should add a !cgo file that triggers a more obvious error, to help with confusion around this? I feel like we considered that before, and I don't remember what we decided.