cmake_minimum_required(VERSION 2.8)

project(target_compile_definitions)

add_executable(target_compile_definitions
  "${CMAKE_CURRENT_SOURCE_DIR}/main.cpp"
)
target_compile_definitions(target_compile_definitions
  PRIVATE MY_PRIVATE_DEFINE
  PUBLIC MY_PUBLIC_DEFINE
  INTERFACE MY_INTERFACE_DEFINE
)

add_library(importedlib UNKNOWN IMPORTED)
target_compile_definitions(importedlib
  INTERFACE MY_IMPORTEDINTERFACE_DEFINE
)

add_executable(consumer
  "${CMAKE_CURRENT_SOURCE_DIR}/consumer.cpp"
)

target_compile_definitions(consumer
  PRIVATE target_compile_definitions importedlib
  $<$<TARGET_DEFINED:notdefined>:SHOULD_NOT_BE_DEFINED>
  $<$<TARGET_DEFINED:importedlib>:SHOULD_BE_DEFINED>
)