| option |
| ------ |
| |
| Provide a boolean option that the user can optionally select. |
| |
| .. code-block:: cmake |
| |
| option(<variable> "<help_text>" [value]) |
| |
| If no initial ``<value>`` is provided, boolean ``OFF`` is the default value. |
| If ``<variable>`` is already set as a normal or cache variable, |
| then the command does nothing (see policy :policy:`CMP0077`). |
| |
| For options that depend on the values of other options, see |
| the module help for :module:`CMakeDependentOption`. |
| |
| In CMake project mode, a boolean cache variable is created with the option |
| value. In CMake script mode, a boolean variable is set with the option value. |
