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variable_watch -------------- Watch the CMake variable for change. .. code-block:: cmake variable_watch(<variable> [<command>]) If the specified ``<variable>`` changes, a message will be printed to inform about the change. Additionally, if ``<command>`` is given, this command will be executed. The command will receive the following arguments: ``COMMAND(<variable> <access> <value> <current_list_file> <stack>)``