Tests/RunCMake/File_Generate/sub2/CMakeLists.txt - third_party/github.com/Kitware/CMake - Git at Google

 add_library(library IMPORTED STATIC)
 set_property(TARGET library PROPERTY COMPILE_DEFINITIONS "second")

 file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/output.txt"
               CONTENT "$<TARGET_PROPERTY:COMPILE_DEFINITIONS>"
               TARGET library
 )
	add_library(library IMPORTED STATIC)
	set_property(TARGET library PROPERTY COMPILE_DEFINITIONS "second")

	file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/output.txt"
	CONTENT "$<TARGET_PROPERTY:COMPILE_DEFINITIONS>"
	TARGET library
	)