mirror of
https://github.com/ZDoom/zdoom-macos-deps.git
synced 2024-11-29 07:02:27 +00:00
64 lines
2.3 KiB
CMake
64 lines
2.3 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
|
# file Copyright.txt or https://cmake.org/licensing for details.
|
|
|
|
#[=======================================================================[.rst:
|
|
CMakeDependentOption
|
|
--------------------
|
|
|
|
Macro to provide an option dependent on other options.
|
|
|
|
This macro presents an option to the user only if a set of other
|
|
conditions are true.
|
|
|
|
Usage:
|
|
|
|
.. code-block:: cmake
|
|
|
|
cmake_dependent_option(<option> "<help_text>" <value> <depends> <force>)
|
|
|
|
Where ``<option>`` is available to the user if ``<depends>`` is true. When
|
|
``<option>`` is available, the given ``<help_text>`` and initial ``<value>``
|
|
are used. If the ``<depends>`` condition is not true, ``<option>`` will not be
|
|
presented and will always have the value given by ``<force>``. Any value set by
|
|
the user is preserved for when the option is presented again. Each element in
|
|
the fourth parameter is evaluated as an if-condition, so
|
|
:ref:`Condition Syntax` can be used.
|
|
|
|
Example invocation:
|
|
|
|
.. code-block:: cmake
|
|
|
|
cmake_dependent_option(USE_FOO "Use Foo" ON
|
|
"USE_BAR;NOT USE_ZOT" OFF)
|
|
|
|
If ``USE_BAR`` is true and ``USE_ZOT`` is false, this provides an option called
|
|
``USE_FOO`` that defaults to ON. Otherwise, it sets ``USE_FOO`` to OFF and
|
|
hides the option from the user. If the status of ``USE_BAR`` or ``USE_ZOT``
|
|
ever changes, any value for the ``USE_FOO`` option is saved so that when the
|
|
option is re-enabled it retains its old value.
|
|
#]=======================================================================]
|
|
|
|
macro(CMAKE_DEPENDENT_OPTION option doc default depends force)
|
|
if(${option}_ISSET MATCHES "^${option}_ISSET$")
|
|
set(${option}_AVAILABLE 1)
|
|
foreach(d ${depends})
|
|
string(REGEX REPLACE " +" ";" CMAKE_DEPENDENT_OPTION_DEP "${d}")
|
|
if(${CMAKE_DEPENDENT_OPTION_DEP})
|
|
else()
|
|
set(${option}_AVAILABLE 0)
|
|
endif()
|
|
endforeach()
|
|
if(${option}_AVAILABLE)
|
|
option(${option} "${doc}" "${default}")
|
|
set(${option} "${${option}}" CACHE BOOL "${doc}" FORCE)
|
|
else()
|
|
if(${option} MATCHES "^${option}$")
|
|
else()
|
|
set(${option} "${${option}}" CACHE INTERNAL "${doc}")
|
|
endif()
|
|
set(${option} ${force})
|
|
endif()
|
|
else()
|
|
set(${option} "${${option}_ISSET}")
|
|
endif()
|
|
endmacro()
|