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Diffstat (limited to 'Help/command/unset.rst')
| -rw-r--r-- | Help/command/unset.rst | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/Help/command/unset.rst b/Help/command/unset.rst index 1a5e49f..7521052 100644 --- a/Help/command/unset.rst +++ b/Help/command/unset.rst @@ -3,6 +3,9 @@ unset Unset a variable, cache variable, or environment variable. +Unset Normal Variable or Cache Entry +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + .. code-block:: cmake unset(<variable> [CACHE | PARENT_SCOPE]) @@ -22,11 +25,17 @@ 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 Environment Variable +^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code-block:: cmake - unset(ENV{LD_LIBRARY_PATH}) + unset(ENV{<variable>}) + +Removes ``<variable>`` from the currently available +:manual:`Environment Variables <cmake-env-variables(7)>`. +Subsequent calls of ``$ENV{<variable>}`` will return the empty string. -in which case the variable will be removed from the current -environment. +This command affects only the current CMake process, not the process +from which CMake was called, nor the system environment at large, +nor the environment of subsequent build or test processes. |