Are you sure you’ve selected Enable Bitcode to NO against build config you’re using (eg DEBUG)? You can check it out in project->target->build settings-> search enable bitcode->set NO in DEBUG (good to remember to try to update libs before test release, maybe it’ll contain bitcode already). Then Edit Scheme -> Run -> check if you … Read more
Bitccode is actually just the LLVM intermediate language. When you compile source code using the LLVM toolchain, source code is translated into an intermediate language, named Bitcode. This Bitcode is then analyzed, optimized and finally translated to CPU instructions for the desired target CPU. The advantage of doing it that way is that all LLVM … Read more
Given some C/C++ file foo.c: > clang -S -emit-llvm foo.c Produces foo.ll which is an LLVM IR file. The -emit-llvm option can also be passed to the compiler front-end directly, and not the driver by means of -cc1: > clang -cc1 foo.c -emit-llvm Produces foo.ll with the IR. -cc1 adds some cool options like -ast-print. … Read more
What does the ENABLE_BITCODE actually do, will it be a non-optional requirement in the future? I’m not sure at what level you are looking for an answer at, so let’s take a little trip. Some of this you may already know. When you build your project, Xcode invokes clang for Objective-C targets and swift/swiftc for … Read more
Bitcode refers to to the type of code: “LLVM Bitcode” that is sent to iTunes Connect. This allows Apple to use certain calculations to re-optimize apps further (e.g: possibly downsize executable sizes). If Apple needs to alter your executable then they can do this without a new build being uploaded. This differs from: Slicing which … Read more
Your library was compiled without bitcode, but the bitcode option is enabled in your project settings. Say NO to Enable Bitcode in your target Build Settings and the Library Build Settings to remove the warnings. For those wondering if enabling bitcode is required: For iOS apps, bitcode is the default, but optional. For watchOS and … Read more