| # - Check if the source code provided in the SOURCE argument compiles and runs. |
| # CHECK_CXX_SOURCE_RUNS(SOURCE VAR) |
| # - macro which checks if the source code compiles |
| # SOURCE - 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 |
| |
| 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) |
| |
