project(target_prop) add_executable(target_prop_executable ../compiletest.cpp) set_target_properties(target_prop_executable PROPERTIES COMPILE_DEFINITIONS CMAKE_IS_FUN) set_property(TARGET target_prop_executable APPEND PROPERTY COMPILE_DEFINITIONS CMAKE_IS_REALLY="Very Fun" CMAKE_IS=Fun) set_property(TARGET target_prop_executable APPEND PROPERTY COMPILE_DEFINITIONS CMAKE_IS_FUN CMAKE_IS_="Fun") set_property(TARGET target_prop_executable APPEND PROPERTY COMPILE_DEFINITIONS TEST_GENERATOR_EXPRESSIONS "$<1:CMAKE_IS_DECLARATIVE>" "$<0:GE_NOT_DEFINED>" )