| unset |
| ----- |
| |
| Unset a variable, cache variable, or environment variable. |
| |
| :: |
| |
| unset(<variable> [CACHE | PARENT_SCOPE]) |
| |
| Removes the specified variable causing it to become undefined. If |
| ``CACHE`` is present then the variable is removed from the cache instead |
| of the current scope. |
| |
| If ``PARENT_SCOPE`` is present then the variable is removed from the scope |
| above the current scope. See the same option in the :command:`set` command |
| for further details. |
| |
| ``<variable>`` can be an environment variable such as: |
| |
| :: |
| |
| unset(ENV{LD_LIBRARY_PATH}) |
| |
| in which case the variable will be removed from the current |
| environment. |
