x/mobile: add bitcode support

[ashutosh-android]

I am able to successfully generate and use .framework file using gomobile bind command, however generated lib doesn't have bitcode enabled
Is there a way to enable bitcode in generated binary or are there are any plan to provide support in near future ?

Please answer these questions before submitting your issue. Thanks!

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

go version go1.8.3 darwin/amd64
gomobile version +44a54e9

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

MacOS

What did you do?

Generated .framework lib from go source code using 'gomobile bind'

What did you expect to see?

bitcode should be enabled in generated framework

What did you see instead?

generated framework doesn't have bitcode enabled

[ashutosh-android]

Can you please update on this. This is a blocker item for one of my project. It will be great if I get some visibility on release plan for this requirement. Thanks.

[timcooijmans]

I'm having the same problem: Currently the Go compiler doesn't support compiling to BitCode intermediate representation. I think something has to be done for Gomobile to have a future. It's expected that Apple will mandate BitCode for iOS-apps in the near future.

However there seems to be some work going on on Google-side: https://go.googlesource.com/gollvm/

You could also try https://dragonegg.llvm.org/ but I have no idea if this is going to work.

[ashutosh-android]

Any update on this ?

[eliasnaur]

I don't think there is any update other than gollvm is progressing. May I ask why this issue is blocking your project?

[ashutosh-android]

@eliasnaur thanks for looking into this query.
I am working on a mobile project where we will be distributing our service as library project. We are writing alot of business logic in go code so that we can reuse them for both android and iOS using go-mobile. Since framework generated by go-mobile doesn't have bitcode enabled so any developer who will be integrating our solution will not be able to enable bitcode for there application. Considering how apple is strongly recommending developers to enable bitcode it will impact adoption our product in a big way.

I hope this answers your question. Let me know if you have any suggestions/query. Thanks again.

[matti777]

Just ran into this. Yes, bitcode support would be a must. Any updates?

[jpop32]

Yes, lack of bitcode support on iOS is a showstopper for library projects, and a big liability for others. We can safely assume that 'strong recommendation' to use bitcode is going to turn into 'requirement' sooner or later.

[adam-p]

Since it hasn't been mentioned here yet: Apple TV apps must support Bitcode. Not optional. Search for "bitcode" here: https://developer.apple.com/tvos/submit/

This has caused us problems when trying to support a client wanting to use our library on Apple TV.

[zboralski]

Just ran into this.

[drewpitchford]

I'll throw my hat in this ring too. We have iOS/Android sdks that use a go-mobile framework for some common encryption/decryption. Lack of bitcode is a major issue for us. I am attempting to replace the go-mobile framework in the iOS project with a js framework that does the same stuff, but it'd be nice to be able to keep the go framework

[pavlo]

It is a showstopper for us as well

[biscottigelato]

WWDC is coming soon, hopefully Bitcode will not become a requirement... The lack of any response from anyone in the know about how one an get Bitcode going for golang/gomobile is definitely concerning.