| CMD_EXPERIMENTAL | |
| ---------------- | |
| .. versionadded:: 4.4 | |
| .. diagnostic:: | |
| :default: warn | |
| :parent: CMD_AUTHOR | |
| Warn if a build system uses an experimental feature, or if CMake detects | |
| that the gate variable for an experimental feature is set to an unrecognized | |
| value. |