diff options
Diffstat (limited to 'share/cmake-3.10/Modules/CheckIncludeFile.cmake')
-rw-r--r-- | share/cmake-3.10/Modules/CheckIncludeFile.cmake | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/share/cmake-3.10/Modules/CheckIncludeFile.cmake b/share/cmake-3.10/Modules/CheckIncludeFile.cmake new file mode 100644 index 0000000..c566e14 --- /dev/null +++ b/share/cmake-3.10/Modules/CheckIncludeFile.cmake @@ -0,0 +1,89 @@ +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + +#.rst: +# CheckIncludeFile +# ---------------- +# +# Provides a macro to check if a header file can be included in ``C``. +# +# .. command:: CHECK_INCLUDE_FILE +# +# :: +# +# CHECK_INCLUDE_FILE(<include> <variable> [<flags>]) +# +# Check if the given ``<include>`` file may be included in a ``C`` +# source file and store the result in an internal cache entry named +# ``<variable>``. The optional third argument may be used to add +# compilation flags to the check (or use ``CMAKE_REQUIRED_FLAGS`` below). +# +# 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 the :module:`CheckIncludeFiles` module to check for multiple headers +# at once. See the :module:`CheckIncludeFileCXX` module to check for headers +# using the ``CXX`` language. + +macro(CHECK_INCLUDE_FILE INCLUDE VARIABLE) + if(NOT DEFINED "${VARIABLE}") + if(CMAKE_REQUIRED_INCLUDES) + set(CHECK_INCLUDE_FILE_C_INCLUDE_DIRS "-DINCLUDE_DIRECTORIES=${CMAKE_REQUIRED_INCLUDES}") + else() + set(CHECK_INCLUDE_FILE_C_INCLUDE_DIRS) + endif() + set(MACRO_CHECK_INCLUDE_FILE_FLAGS ${CMAKE_REQUIRED_FLAGS}) + set(CHECK_INCLUDE_FILE_VAR ${INCLUDE}) + configure_file(${CMAKE_ROOT}/Modules/CheckIncludeFile.c.in + ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.c) + if(NOT CMAKE_REQUIRED_QUIET) + message(STATUS "Looking for ${INCLUDE}") + endif() + if(${ARGC} EQUAL 3) + set(CMAKE_C_FLAGS_SAVE ${CMAKE_C_FLAGS}) + string(APPEND CMAKE_C_FLAGS " ${ARGV2}") + endif() + + try_compile(${VARIABLE} + ${CMAKE_BINARY_DIR} + ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.c + COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} + CMAKE_FLAGS + -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_INCLUDE_FILE_FLAGS} + "${CHECK_INCLUDE_FILE_C_INCLUDE_DIRS}" + OUTPUT_VARIABLE OUTPUT) + + if(${ARGC} EQUAL 3) + set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS_SAVE}) + endif() + + if(${VARIABLE}) + if(NOT CMAKE_REQUIRED_QUIET) + message(STATUS "Looking for ${INCLUDE} - found") + endif() + set(${VARIABLE} 1 CACHE INTERNAL "Have include ${INCLUDE}") + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log + "Determining if the include file ${INCLUDE} " + "exists passed with the following output:\n" + "${OUTPUT}\n\n") + else() + if(NOT CMAKE_REQUIRED_QUIET) + message(STATUS "Looking for ${INCLUDE} - not found") + endif() + set(${VARIABLE} "" CACHE INTERNAL "Have include ${INCLUDE}") + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log + "Determining if the include file ${INCLUDE} " + "exists failed with the following output:\n" + "${OUTPUT}\n\n") + endif() + endif() +endmacro() |