cmake_minimum_required(VERSION 3.3) project(SwiftMix C Swift) add_executable(SwiftMix CMain.c ObjCMain.m SwiftMain.swift ObjC-Swift.h) set_property(TARGET SwiftMix PROPERTY XCODE_ATTRIBUTE_SWIFT_OBJC_BRIDGING_HEADER "ObjC-Swift.h") target_compile_options(SwiftMix PRIVATE "$<$:-Werror=objc-method-access>") target_compile_definitions(SwiftMix PRIVATE "$,SWIFTCOND,CCOND=2>" FOO BAR=3)