project(External)
enable_language(CXX)

file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/generated.cxx" "")
add_executable(generated_exe empty.c)
target_sources(generated_exe PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/generated.cxx")
source_group("Generated Source Files" FILES "${CMAKE_CURRENT_BINARY_DIR}/generated.cxx")
set_property(SOURCE "${CMAKE_CURRENT_BINARY_DIR}/generated.cxx" PROPERTY GENERATED ON)
set_property(SOURCE empty.c PROPERTY COMPILE_DEFINITIONS EMPTY_C=1 SRC_DUMMY)
set_property(SOURCE empty.c PROPERTY INCLUDE_DIRECTORIES "${CMAKE_CURRENT_BINARY_DIR}")
target_include_directories(generated_exe SYSTEM PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}")
target_compile_definitions(generated_exe PRIVATE GENERATED_EXE=1 -DTGT_DUMMY)
set_source_files_properties(empty.c PROPERTIES COMPILE_OPTIONS SRC_COMPILE_OPTIONS_DUMMY)

install(DIRECTORY . DESTINATION dir3)
install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} EXCLUDE_FROM_ALL DESTINATION dir4)