diff options
Diffstat (limited to 'Modules/CheckIncludeFiles.cmake')
| -rw-r--r-- | Modules/CheckIncludeFiles.cmake | 42 |
1 files changed, 37 insertions, 5 deletions
diff --git a/Modules/CheckIncludeFiles.cmake b/Modules/CheckIncludeFiles.cmake index bef11a5..59afdab 100644 --- a/Modules/CheckIncludeFiles.cmake +++ b/Modules/CheckIncludeFiles.cmake @@ -6,19 +6,24 @@ # ----------------- # # Provides a macro to check if a list of one or more header files can -# be included together in ``C``. +# be included together. # # .. command:: CHECK_INCLUDE_FILES # # :: # -# CHECK_INCLUDE_FILES("<includes>" <variable>) +# CHECK_INCLUDE_FILES("<includes>" <variable> [LANGUAGE <language>]) # # Check if the given ``<includes>`` list may be included together -# in a ``C`` source file and store the result in an internal cache +# in a 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. # +# If LANGUAGE is set, the specified compiler will be used to perform the +# check. Acceptable values are ``C`` and ``CXX``. If not set, the C compiler +# will be used if enabled. If the C compiler is not enabled, the C++ +# compiler will be used if enabled. +# # The following variables may be set before calling this macro to modify # the way the check is run: # @@ -34,9 +39,36 @@ # See modules :module:`CheckIncludeFile` and :module:`CheckIncludeFileCXX` # to check for a single header file in ``C`` or ``CXX`` languages. +include_guard(GLOBAL) + macro(CHECK_INCLUDE_FILES INCLUDE VARIABLE) if(NOT DEFINED "${VARIABLE}") set(CMAKE_CONFIGURABLE_FILE_CONTENT "/* */\n") + + if("x${ARGN}" STREQUAL "x") + if(CMAKE_C_COMPILER_LOADED) + set(_lang C) + elseif(CMAKE_CXX_COMPILER_LOADED) + set(_lang CXX) + else() + message(FATAL_ERROR "CHECK_INCLUDE_FILES needs either C or CXX language enabled.\n") + endif() + elseif("x${ARGN}" MATCHES "^xLANGUAGE;([a-zA-Z]+)$") + set(_lang "${CMAKE_MATCH_1}") + elseif("x${ARGN}" MATCHES "^xLANGUAGE$") + message(FATAL_ERROR "No languages listed for LANGUAGE option.\nSupported languages: C, CXX.\n") + else() + message(FATAL_ERROR "Unknown arguments:\n ${ARGN}\n") + endif() + + if(_lang STREQUAL "C") + set(src ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CheckIncludeFiles/${VARIABLE}.c) + elseif(_lang STREQUAL "CXX") + set(src ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CheckIncludeFiles/${VARIABLE}.cpp) + else() + message(FATAL_ERROR "Unknown language:\n ${_lang}\nSupported languages: C, CXX.\n") + endif() + if(CMAKE_REQUIRED_INCLUDES) set(CHECK_INCLUDE_FILES_INCLUDE_DIRS "-DINCLUDE_DIRECTORIES=${CMAKE_REQUIRED_INCLUDES}") else() @@ -51,7 +83,7 @@ macro(CHECK_INCLUDE_FILES INCLUDE VARIABLE) string(APPEND CMAKE_CONFIGURABLE_FILE_CONTENT "\n\nint main(void){return 0;}\n") configure_file("${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in" - "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFiles.c" @ONLY) + "${src}" @ONLY) set(_INCLUDE ${INCLUDE}) # remove empty elements if("${_INCLUDE}" MATCHES "^([^;]+);.+;([^;]+)$") @@ -68,7 +100,7 @@ macro(CHECK_INCLUDE_FILES INCLUDE VARIABLE) endif() try_compile(${VARIABLE} ${CMAKE_BINARY_DIR} - ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFiles.c + ${src} COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_INCLUDE_FILES_FLAGS} |