cmake_minimum_required(VERSION 3.4)

project(Foo)

file(WRITE foo.cpp "int main() {}")
file(WRITE foo.rc)

set(CMAKE_C_FLAGS "-DI_C=1")
set(CMAKE_CXX_FLAGS "-DI_CXX=1")
set(CMAKE_RC_FLAGS "-DI_RC=1")

add_executable(foo foo.cpp foo.rc)