CMake/Help/command/define_property.rst

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define_property
---------------
Define and document custom properties.
::
define_property(<GLOBAL | DIRECTORY | TARGET | SOURCE |
TEST | VARIABLE | CACHED_VARIABLE>
PROPERTY <name> [INHERITED]
BRIEF_DOCS <brief-doc> [docs...]
FULL_DOCS <full-doc> [docs...])
Define one property in a scope for use with the :command:`set_property` and
:command:`get_property` commands. This is primarily useful to associate
documentation with property names that may be retrieved with the
:command:`get_property` command. The first argument determines the kind of
scope in which the property should be used. It must be one of the
following:
::
GLOBAL = associated with the global namespace
DIRECTORY = associated with one directory
TARGET = associated with one target
SOURCE = associated with one source file
TEST = associated with a test named with add_test
VARIABLE = documents a CMake language variable
CACHED_VARIABLE = documents a CMake cache variable
Note that unlike :command:`set_property` and :command:`get_property` no
actual scope needs to be given; only the kind of scope is important.
The required ``PROPERTY`` option is immediately followed by the name of
the property being defined.
If the ``INHERITED`` option then the :command:`get_property` command will
chain up to the next higher scope when the requested property is not set
in the scope given to the command. ``DIRECTORY`` scope chains to
``GLOBAL``. ``TARGET``, ``SOURCE``, and ``TEST`` chain to ``DIRECTORY``.
The ``BRIEF_DOCS`` and ``FULL_DOCS`` options are followed by strings to be
associated with the property as its brief and full documentation.
Corresponding options to the :command:`get_property` command will retrieve
the documentation.