COMPILE_DEFINITIONS_ ---------------------------- Ignored. See CMake Policy :policy:`CMP0043`. Per-configuration preprocessor definitions in a directory. This is the configuration-specific version of :prop_dir:`COMPILE_DEFINITIONS` where ```` is an upper-case name (ex. ``COMPILE_DEFINITIONS_DEBUG``). This property will be initialized in each directory by its value in the directory's parent. Contents of ``COMPILE_DEFINITIONS_`` may use "generator expressions" with the syntax ``$<...>``. See the :manual:`cmake-generator-expressions(7)` manual for available expressions. See the :manual:`cmake-buildsystem(7)` manual for more on defining buildsystem properties. Generator expressions should be preferred instead of setting this property.