go: Go 1.16 beta1: ios/amd64 build fails

What version of Go are you using (`go version`)?

$ go version
go version go1.16beta1 darwin/amd64

What did you do?

I have a cross-compilation test which I run on CI. It builds a binary for all supported GOOS / GOARCH combinations (as reported by go tool dist list).

Using Go 1.15.x, GOOS=ios GOARCH=amd64 is unsupported:

cmd/go: unsupported GOOS/GOARCH pair ios/amd64

Go 1.16 apparently adds support, but building fails. On my Mac, the error message is the following:

❯ GOOS=ios GOARCH=amd64 go build example/main.go
# command-line-arguments
loadinternal: cannot find runtime/cgo

On CI (GitHub Actions), I’m getting the following failure:

# command-line-arguments
loadinternal: cannot find runtime/cgo
/opt/hostedtoolcache/go/1.16.0-beta1/x64/pkg/tool/linux_amd64/link: running gcc failed: exit status 1
/usr/bin/ld: cannot find 1144: No such file or directory
/tmp/go-link-046955828/go.o: file not recognized: file format not recognized
collect2: error: ld returned 1 exit status

Not sure what exactly this means, nor do I particularly care about building for this architecture. However, if go tool dist list lists this as a support combination, I would have expected the build to succeed.

What did you expect to see?

go build should succeed.

What did you see instead?

go build failed, see above.

About this issue

Original URL
State: closed
Created 4 years ago
Comments: 23 (17 by maintainers)

Commits related to this issue

misc/ios: add to README how to build ios executables Updates #43371, #43343. Change-Id: I19386269245f2c20345c6cac7560089b8223e9f9 Reviewed-on: https://go-review.googlesource.com/c/go/+/280153 Trust:... — committed to golang/go by cherrymui 4 years ago
doc/go1.16: reference misc/ios/README for how to build iOS programs Updates #43371, #43343. Change-Id: Ib89b809a5220717507272453ea86224d1928dd36 Reviewed-on: https://go-review.googlesource.com/c/go/... — committed to golang/go by cherrymui 4 years ago
build: Enable CGO for ios builds This might fix the issue when running ios builds. See https://github.com/golang/go/issues/43343 — committed to celo-org/celo-blockchain by deleted user 3 years ago

Most upvoted comments

@churrymui Yes CGO_ENABLED=1 GOOS=ios GOARCH=amd64 go build works.

The main issue is that GOOS=ios GOARCH=amd64 go build gives a really weird error - so it would be better to print out CGO_ENABLED=1 is required for ios/amd64 or alternatively add CGO_ENABLED=1 automatically.

egonelbre on Dec 24, 2020

Erroring sounds less “risky” because it can be made to work later.

Yeah, I think it shouldn’t be hard to make internal linking work for iOS, then you don’t need the C linker. Maybe in Go 1.17. Not sure it is that useful, though, since for actual iOS apps I think it generally needs some C (or other language) part.

That said, I think it’s been the case for quite a while (CGO_ENABLED stuff for cross-compilation). As we’re late in the release cycle, maybe it’s better to do the erroring behavior in Go 1.17. This probably will be in cmd/go, but I’m not sure exactly where. Issue #31544 might be relevant (about the loadinternal message).

cherrymui on Dec 23, 2020