diff options
Diffstat (limited to 'share/cmake-3.10/Modules/CMakePushCheckState.cmake')
| -rw-r--r-- | share/cmake-3.10/Modules/CMakePushCheckState.cmake | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/share/cmake-3.10/Modules/CMakePushCheckState.cmake b/share/cmake-3.10/Modules/CMakePushCheckState.cmake new file mode 100644 index 0000000..98eea05 --- /dev/null +++ b/share/cmake-3.10/Modules/CMakePushCheckState.cmake @@ -0,0 +1,86 @@ +# 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_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: +# +# :: +# +# 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_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} ${CMAKE_REQUIRED_DEFINITIONS}) + set(_CMAKE_REQUIRED_LIBRARIES_SAVE_${_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_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() |