https://github.com/tpoechtrager/cctools-port As an example building compiler-rt needs `lipo` https://github.com/llvm/llvm-project/blob/df3e903655e2499968fc7af64fb5fa52b2ee79bb/compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake#L323
