# - Check if the given C source code compiles and runs. # CHECK_C_SOURCE_RUNS( ) # - source code to try to compile # - 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_C_SOURCE_RUNS SOURCE VAR) if("${VAR}" MATCHES "^${VAR}$") set(MACRO_CHECK_FUNCTION_DEFINITIONS "-D${VAR} ${CMAKE_REQUIRED_FLAGS}") if(CMAKE_REQUIRED_LIBRARIES) set(CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}) else() set(CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES) endif() if(CMAKE_REQUIRED_INCLUDES) set(CHECK_C_SOURCE_COMPILES_ADD_INCLUDES "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}") else() set(CHECK_C_SOURCE_COMPILES_ADD_INCLUDES) endif() file(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c" "${SOURCE}\n") message(STATUS "Performing Test ${VAR}") try_run(${VAR}_EXITCODE ${VAR}_COMPILED ${CMAKE_BINARY_DIR} ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} ${CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES} CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS} -DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH} "${CHECK_C_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() # 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${SOURCE}\n") else() if(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN") set(${VAR} "${${VAR}_EXITCODE}") else() set(${VAR} "" CACHE INTERNAL "Test ${VAR}") endif() 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() endif() endmacro()