Bitcode Questions

I am facing this issue and unable to release the app in appstore. app is already in app store and i want to release a new version now. this issue

I modified a bitcode enabled ipa using the open source llvm toolchain's opt and ran my own llvm pass on the bitcode files. after

I'm encountering a build error when i set 'enable bitcode' to 'yes' in the build settings of a project i'm currently working on. the error is: