| <PROJECT-NAME>_IS_TOP_LEVEL | |
| --------------------------- | |
| .. versionadded:: 3.21 | |
| A boolean variable indicating whether the named project was called in a top | |
| level ``CMakeLists.txt`` file. | |
| To obtain the value from the most recent call to :command:`project` in | |
| the current directory scope or above, see the | |
| :variable:`PROJECT_IS_TOP_LEVEL` variable. |