Set this target property to a true (or false) value to exclude (or include) the target from the “all” target of the containing directory and its ancestors. If excluded, running e.g. make in the containing directory or its ancestors will not build the target by default.

If this target property is not set then the target will be included in the “all” target of the containing directory. Furthermore, it will be included in the “all” target of its ancestor directories unless the EXCLUDE_FROM_ALL directory property is set.

With EXCLUDE_FROM_ALL set to false or not set at all, the target will be brought up to date as part of doing a make install or its equivalent for the CMake generator being used. If a target has EXCLUDE_FROM_ALL set to true, then any attempt to install that target has undefined behavior. Note that such a target can still safely be listed in an install(TARGETS) command as long as the install components the target belongs to are not part of the set of components that anything tries to install.