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Diffstat (limited to 'Modules/CheckIncludeFiles.cmake')
| -rw-r--r-- | Modules/CheckIncludeFiles.cmake | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/Modules/CheckIncludeFiles.cmake b/Modules/CheckIncludeFiles.cmake new file mode 100644 index 0000000..843cd35 --- /dev/null +++ b/Modules/CheckIncludeFiles.cmake @@ -0,0 +1,107 @@ +#.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() |