| # - Check if the given C++ source code compiles. |
| # CHECK_CXX_SOURCE_COMPILES(<code> <var> [FAIL_REGEX <fail-regex>]) |
| # <code> - source code to try to compile |
| # <var> - variable to store whether the source code compiled |
| # <fail-regex> - fail if test output matches this regex |
| # 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 2005-2009 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 distributed this file outside of CMake, substitute the full |
| # License text for the above reference.) |
| |
| MACRO(CHECK_CXX_SOURCE_COMPILES SOURCE VAR) |
| IF("${VAR}" MATCHES "^${VAR}$") |
| SET(_FAIL_REGEX) |
| SET(_key) |
| FOREACH(arg ${ARGN}) |
| IF("${arg}" MATCHES "^(FAIL_REGEX)$") |
| SET(_key "${arg}") |
| ELSEIF(_key) |
| LIST(APPEND _${_key} "${arg}") |
| ELSE() |
| MESSAGE(FATAL_ERROR "Unknown argument:\n ${arg}\n") |
| ENDIF() |
| ENDFOREACH() |
| |
| SET(MACRO_CHECK_FUNCTION_DEFINITIONS |
| "-D${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 ${VAR}") |
| TRY_COMPILE(${VAR} |
| ${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} |
| "${CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES}" |
| "${CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES}" |
| OUTPUT_VARIABLE OUTPUT) |
| |
| FOREACH(_regex ${_FAIL_REGEX}) |
| IF("${OUTPUT}" MATCHES "${_regex}") |
| SET(${VAR} 0) |
| ENDIF() |
| ENDFOREACH() |
| |
| IF(${VAR}) |
| SET(${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" |
| "Source file was:\n${SOURCE}\n") |
| ELSE(${VAR}) |
| MESSAGE(STATUS "Performing Test ${VAR} - Failed") |
| SET(${VAR} "" CACHE INTERNAL "Test ${VAR}") |
| FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log |
| "Performing C++ SOURCE FILE Test ${VAR} failed with the following output:\n" |
| "${OUTPUT}\n" |
| "Source file was:\n${SOURCE}\n") |
| ENDIF(${VAR}) |
| ENDIF("${VAR}" MATCHES "^${VAR}$") |
| ENDMACRO(CHECK_CXX_SOURCE_COMPILES) |
| |