| Output directory in which to build |XXX| target files. | |
| This property specifies the directory into which |xxx| target files | |
| should be built. Multi-configuration generators (VS, Xcode) append a | |
| per-configuration subdirectory to the specified directory. | |
| This property is initialized by the value of the variable | |
| |CMAKE_XXX_OUTPUT_DIRECTORY| if it is set when a target is created. |