| #.rst: |
| # CheckIncludeFiles |
| # ----------------- |
| # |
| # Provides a macro to check if a list of one or more header files can |
| # be included together in ``C``. |
| # |
| # .. command:: CHECK_INCLUDE_FILES |
| # |
| # :: |
| # |
| # CHECK_INCLUDE_FILES("<includes>" <variable>) |
| # |
| # Check if the given ``<includes>`` list may be included together |
| # in a ``C`` source file and store the result in an internal cache |
| # entry named ``<variable>``. Specify the ``<includes>`` argument |
| # as a :ref:`;-list <CMake Language Lists>` of header file names. |
| # |
| # The following variables may be set before calling this macro to modify |
| # the way the check is run: |
| # |
| # ``CMAKE_REQUIRED_FLAGS`` |
| # string of compile command line flags |
| # ``CMAKE_REQUIRED_DEFINITIONS`` |
| # list of macros to define (-DFOO=bar) |
| # ``CMAKE_REQUIRED_INCLUDES`` |
| # list of include directories |
| # ``CMAKE_REQUIRED_QUIET`` |
| # execute quietly without messages |
| # |
| # See modules :module:`CheckIncludeFile` and :module:`CheckIncludeFileCXX` |
| # to check for a single header file in ``C`` or ``CXX`` languages. |
| |
| #============================================================================= |
| # Copyright 2003-2012 Kitware, Inc. |
| # |
| # Distributed under the OSI-approved BSD License (the "License"); |
| # see accompanying file Copyright.txt for details. |
| # |
| # This software is distributed WITHOUT ANY WARRANTY; without even the |
| # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| # See the License for more information. |
| #============================================================================= |
| # (To distribute this file outside of CMake, substitute the full |
| # License text for the above reference.) |
| |
| macro(CHECK_INCLUDE_FILES INCLUDE VARIABLE) |
| if(NOT DEFINED "${VARIABLE}") |
| set(CMAKE_CONFIGURABLE_FILE_CONTENT "/* */\n") |
| if(CMAKE_REQUIRED_INCLUDES) |
| set(CHECK_INCLUDE_FILES_INCLUDE_DIRS "-DINCLUDE_DIRECTORIES=${CMAKE_REQUIRED_INCLUDES}") |
| else() |
| set(CHECK_INCLUDE_FILES_INCLUDE_DIRS) |
| endif() |
| set(CHECK_INCLUDE_FILES_CONTENT "/* */\n") |
| set(MACRO_CHECK_INCLUDE_FILES_FLAGS ${CMAKE_REQUIRED_FLAGS}) |
| foreach(FILE ${INCLUDE}) |
| set(CMAKE_CONFIGURABLE_FILE_CONTENT |
| "${CMAKE_CONFIGURABLE_FILE_CONTENT}#include <${FILE}>\n") |
| endforeach() |
| set(CMAKE_CONFIGURABLE_FILE_CONTENT |
| "${CMAKE_CONFIGURABLE_FILE_CONTENT}\n\nint main(void){return 0;}\n") |
| configure_file("${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in" |
| "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFiles.c" @ONLY) |
| |
| set(_INCLUDE ${INCLUDE}) # remove empty elements |
| if("${_INCLUDE}" MATCHES "^([^;]+);.+;([^;]+)$") |
| list(LENGTH _INCLUDE _INCLUDE_LEN) |
| set(_description "${_INCLUDE_LEN} include files ${CMAKE_MATCH_1}, ..., ${CMAKE_MATCH_2}") |
| elseif("${_INCLUDE}" MATCHES "^([^;]+);([^;]+)$") |
| set(_description "include files ${CMAKE_MATCH_1}, ${CMAKE_MATCH_2}") |
| else() |
| set(_description "include file ${_INCLUDE}") |
| endif() |
| |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(STATUS "Looking for ${_description}") |
| endif() |
| try_compile(${VARIABLE} |
| ${CMAKE_BINARY_DIR} |
| ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFiles.c |
| COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} |
| CMAKE_FLAGS |
| -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_INCLUDE_FILES_FLAGS} |
| "${CHECK_INCLUDE_FILES_INCLUDE_DIRS}" |
| OUTPUT_VARIABLE OUTPUT) |
| if(${VARIABLE}) |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(STATUS "Looking for ${_description} - found") |
| endif() |
| set(${VARIABLE} 1 CACHE INTERNAL "Have include ${INCLUDE}") |
| file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log |
| "Determining if files ${INCLUDE} " |
| "exist passed with the following output:\n" |
| "${OUTPUT}\n\n") |
| else() |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(STATUS "Looking for ${_description} - not found") |
| endif() |
| set(${VARIABLE} "" CACHE INTERNAL "Have includes ${INCLUDE}") |
| file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log |
| "Determining if files ${INCLUDE} " |
| "exist failed with the following output:\n" |
| "${OUTPUT}\nSource:\n${CMAKE_CONFIGURABLE_FILE_CONTENT}\n") |
| endif() |
| endif() |
| endmacro() |