rnfbdemo: Building iOS to a real device fails

When building the rnfbdemo project to real iOS device it fails with the below error

Link folly
ld: -U and -bitcode_bundle (Xcode setting ENABLE_BITCODE=YES) cannot be used together
clang: error: linker command failed with exit code 1 (use -v to see invocation)

About this issue

Original URL
State: closed
Created 2 years ago
Reactions: 3
Comments: 17 (6 by maintainers)

Most upvoted comments

Turns out (from the related PR on react-native) that this may always be incompatible with bitcode but apparently bitcode is deprecated in Xcode 14 anyway. So, it is perhaps best to simply disable it, then there’s no problem. In Podfile in postinstall this will do it, I will probably update make-demo.sh to do this when I get a chance

  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['ENABLE_BITCODE'] = 'NO'
    end
  end

+25

mikehardy on Jun 30, 2022

Disabling Bitcode started giving me errors with other libraries like Reanimated. I ended up using framework with the option use_frameworks! :linkage => :static and it solved the problem

+10

raghav-mylagary on Jul 1, 2022

Turns out (from the related PR on react-native) that this may always be incompatible with bitcode but apparently bitcode is deprecated in Xcode 14 anyway. So, it is perhaps best to simply disable it, then there’s no problem. In Podfile in postinstall this will do it, I will probably update make-demo.sh to do this when I get a chance
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['ENABLE_BITCODE'] = 'NO'
    end
  end

This workaround solved the issue for me, but I also had to disable Bitcode for release builds in my project’s XCode config.

ptreitler on Jul 7, 2022

@mikehardy I created a new project using 69.1 and got the same error on a real device

1. npx react-native init RN --version=0.69.1
2. Enabled Hermes and use_frameworks in podfile
3. Build on a real iOS device

Error

raghav-mylagary on Jun 29, 2022

nice finding for it’s jsc not hermes by the __jsiExecutorDescription. i proposed a pr in https://github.com/facebook/react-native/pull/34222 let’s see how do people think for this approach.

Kudo on Jul 19, 2022

Yes - other libraries may have issues as well, it really is a big change, thanks for reporting what worked, that will help me and others going forward!

mikehardy on Jul 1, 2022

Thanks again for bringing this up - I tagged you in the related react-native discussions for well-earned credit, of course unsubscribe if it’s bothersome (and, apologies) - I dropped that part of the patch and make sure hermes is not enabled in make-demo.sh now, so it works with react-native 0.69.0 - I’ll have to reverse that part of the patch as a forward-port to react-native 0.69.1, I’ll do that in a bit

mikehardy on Jun 29, 2022