mirror of
https://github.com/reactos/CMake.git
synced 2024-11-24 03:59:58 +00:00
92 lines
3.8 KiB
CMake
92 lines
3.8 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
|
# file Copyright.txt or https://cmake.org/licensing for details.
|
|
|
|
#[=======================================================================[.rst:
|
|
CMakePushCheckState
|
|
-------------------
|
|
|
|
|
|
|
|
This module defines three macros: ``CMAKE_PUSH_CHECK_STATE()``
|
|
``CMAKE_POP_CHECK_STATE()`` and ``CMAKE_RESET_CHECK_STATE()`` These macros can
|
|
be used to save, restore and reset (i.e., clear contents) the state of
|
|
the variables ``CMAKE_REQUIRED_FLAGS``, ``CMAKE_REQUIRED_DEFINITIONS``,
|
|
``CMAKE_REQUIRED_LINK_OPTIONS``, ``CMAKE_REQUIRED_LIBRARIES``,
|
|
``CMAKE_REQUIRED_INCLUDES`` and ``CMAKE_EXTRA_INCLUDE_FILES`` used by the
|
|
various Check-files coming with CMake, like e.g. ``check_function_exists()``
|
|
etc.
|
|
The variable contents are pushed on a stack, pushing multiple times is
|
|
supported. This is useful e.g. when executing such tests in a Find-module,
|
|
where they have to be set, but after the Find-module has been executed they
|
|
should have the same value as they had before.
|
|
|
|
``CMAKE_PUSH_CHECK_STATE()`` macro receives optional argument ``RESET``.
|
|
Whether it's specified, ``CMAKE_PUSH_CHECK_STATE()`` will set all
|
|
``CMAKE_REQUIRED_*`` variables to empty values, same as
|
|
``CMAKE_RESET_CHECK_STATE()`` call will do.
|
|
|
|
Usage:
|
|
|
|
.. code-block:: cmake
|
|
|
|
cmake_push_check_state(RESET)
|
|
set(CMAKE_REQUIRED_DEFINITIONS -DSOME_MORE_DEF)
|
|
check_function_exists(...)
|
|
cmake_reset_check_state()
|
|
set(CMAKE_REQUIRED_DEFINITIONS -DANOTHER_DEF)
|
|
check_function_exists(...)
|
|
cmake_pop_check_state()
|
|
#]=======================================================================]
|
|
|
|
macro(CMAKE_RESET_CHECK_STATE)
|
|
|
|
set(CMAKE_EXTRA_INCLUDE_FILES)
|
|
set(CMAKE_REQUIRED_INCLUDES)
|
|
set(CMAKE_REQUIRED_DEFINITIONS)
|
|
set(CMAKE_REQUIRED_LINK_OPTIONS)
|
|
set(CMAKE_REQUIRED_LIBRARIES)
|
|
set(CMAKE_REQUIRED_FLAGS)
|
|
set(CMAKE_REQUIRED_QUIET)
|
|
|
|
endmacro()
|
|
|
|
macro(CMAKE_PUSH_CHECK_STATE)
|
|
|
|
if(NOT DEFINED _CMAKE_PUSH_CHECK_STATE_COUNTER)
|
|
set(_CMAKE_PUSH_CHECK_STATE_COUNTER 0)
|
|
endif()
|
|
|
|
math(EXPR _CMAKE_PUSH_CHECK_STATE_COUNTER "${_CMAKE_PUSH_CHECK_STATE_COUNTER}+1")
|
|
|
|
set(_CMAKE_EXTRA_INCLUDE_FILES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_EXTRA_INCLUDE_FILES})
|
|
set(_CMAKE_REQUIRED_INCLUDES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_REQUIRED_INCLUDES})
|
|
set(_CMAKE_REQUIRED_DEFINITIONS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_REQUIRED_DEFINITIONS})
|
|
set(_CMAKE_REQUIRED_LINK_OPTIONS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_REQUIRED_LINK_OPTIONS})
|
|
set(_CMAKE_REQUIRED_LIBRARIES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_REQUIRED_LIBRARIES})
|
|
set(_CMAKE_REQUIRED_FLAGS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_REQUIRED_FLAGS})
|
|
set(_CMAKE_REQUIRED_QUIET_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER} ${CMAKE_REQUIRED_QUIET})
|
|
|
|
if (${ARGC} GREATER 0 AND "${ARGV0}" STREQUAL "RESET")
|
|
cmake_reset_check_state()
|
|
endif()
|
|
|
|
endmacro()
|
|
|
|
macro(CMAKE_POP_CHECK_STATE)
|
|
|
|
# don't pop more than we pushed
|
|
if("${_CMAKE_PUSH_CHECK_STATE_COUNTER}" GREATER "0")
|
|
|
|
set(CMAKE_EXTRA_INCLUDE_FILES ${_CMAKE_EXTRA_INCLUDE_FILES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
|
|
set(CMAKE_REQUIRED_INCLUDES ${_CMAKE_REQUIRED_INCLUDES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
|
|
set(CMAKE_REQUIRED_DEFINITIONS ${_CMAKE_REQUIRED_DEFINITIONS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
|
|
set(CMAKE_REQUIRED_LINK_OPTIONS ${_CMAKE_REQUIRED_LINK_OPTIONS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
|
|
set(CMAKE_REQUIRED_LIBRARIES ${_CMAKE_REQUIRED_LIBRARIES_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
|
|
set(CMAKE_REQUIRED_FLAGS ${_CMAKE_REQUIRED_FLAGS_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
|
|
set(CMAKE_REQUIRED_QUIET ${_CMAKE_REQUIRED_QUIET_SAVE_${_CMAKE_PUSH_CHECK_STATE_COUNTER}})
|
|
|
|
math(EXPR _CMAKE_PUSH_CHECK_STATE_COUNTER "${_CMAKE_PUSH_CHECK_STATE_COUNTER}-1")
|
|
endif()
|
|
|
|
endmacro()
|