# - Check if the given C++ source code compiles and runs. # CHECK_CXX_SOURCE_RUNS(<code> <var>) # <code> - source code to try to compile # <var> - variable to store the result # (1 for success, empty for failure) # 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_LIBRARIES = list of libraries to link #============================================================================= # Copyright 2006-2009 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_CXX_SOURCE_RUNS SOURCE VAR) IF("${VAR}" MATCHES "^${VAR}$") SET(MACRO_CHECK_FUNCTION_DEFINITIONS "-D${VAR} ${CMAKE_REQUIRED_FLAGS}") IF(CMAKE_REQUIRED_LIBRARIES) SET(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}") ELSE(CMAKE_REQUIRED_LIBRARIES) SET(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES) ENDIF(CMAKE_REQUIRED_LIBRARIES) IF(CMAKE_REQUIRED_INCLUDES) SET(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}") ELSE(CMAKE_REQUIRED_INCLUDES) SET(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES) ENDIF(CMAKE_REQUIRED_INCLUDES) FILE(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx" "${SOURCE}\n") MESSAGE(STATUS "Performing Test ${VAR}") TRY_RUN(${VAR}_EXITCODE ${VAR}_COMPILED ${CMAKE_BINARY_DIR} ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS} -DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH} "${CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES}" "${CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES}" COMPILE_OUTPUT_VARIABLE OUTPUT) # if it did not compile make the return value fail code of 1 IF(NOT ${VAR}_COMPILED) SET(${VAR}_EXITCODE 1) ENDIF(NOT ${VAR}_COMPILED) # if the return value was 0 then it worked IF("${${VAR}_EXITCODE}" EQUAL 0) SET(${VAR} 1 CACHE INTERNAL "Test ${VAR}") MESSAGE(STATUS "Performing Test ${VAR} - Success") FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log "Performing C++ SOURCE FILE Test ${VAR} succeded with the following output:\n" "${OUTPUT}\n" "Return value: ${${VAR}}\n" "Source file was:\n${SOURCE}\n") ELSE("${${VAR}_EXITCODE}" EQUAL 0) IF(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN") SET(${VAR} "${${VAR}_EXITCODE}") ELSE(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN") SET(${VAR} "" CACHE INTERNAL "Test ${VAR}") ENDIF(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN") MESSAGE(STATUS "Performing Test ${VAR} - Failed") FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log "Performing C++ SOURCE FILE Test ${VAR} failed with the following output:\n" "${OUTPUT}\n" "Return value: ${${VAR}_EXITCODE}\n" "Source file was:\n${SOURCE}\n") ENDIF("${${VAR}_EXITCODE}" EQUAL 0) ENDIF("${VAR}" MATCHES "^${VAR}$") ENDMACRO(CHECK_CXX_SOURCE_RUNS)