| |
| # determine the compiler to use for C++ programs |
| # NOTE, a generator may set CMAKE_CXX_COMPILER before |
| # loading this file to force a compiler. |
| # use environment variable CXX first if defined by user, next use |
| # the cmake variable CMAKE_GENERATOR_CXX which can be defined by a generator |
| # as a default compiler |
| |
| IF(NOT CMAKE_CXX_COMPILER) |
| SET(CMAKE_CXX_COMPILER_INIT NOTFOUND) |
| |
| # prefer the environment variable CXX |
| IF($ENV{CXX} MATCHES ".+") |
| GET_FILENAME_COMPONENT(CMAKE_CXX_COMPILER_INIT $ENV{CXX} PROGRAM PROGRAM_ARGS CMAKE_CXX_FLAGS_ENV_INIT) |
| IF(CMAKE_CXX_FLAGS_ENV_INIT) |
| SET(CMAKE_CXX_COMPILER_ARG1 "${CMAKE_CXX_FLAGS_ENV_INIT}" CACHE STRING "First argument to CXX compiler") |
| ENDIF(CMAKE_CXX_FLAGS_ENV_INIT) |
| IF(EXISTS ${CMAKE_CXX_COMPILER_INIT}) |
| ELSE(EXISTS ${CMAKE_CXX_COMPILER_INIT}) |
| MESSAGE(FATAL_ERROR "Could not find compiler set in environment variable CXX:\n$ENV{CXX}.\n${CMAKE_CXX_COMPILER_INIT}") |
| ENDIF(EXISTS ${CMAKE_CXX_COMPILER_INIT}) |
| ENDIF($ENV{CXX} MATCHES ".+") |
| |
| # next prefer the generator specified compiler |
| IF(CMAKE_GENERATOR_CXX) |
| IF(NOT CMAKE_CXX_COMPILER_INIT) |
| SET(CMAKE_CXX_COMPILER_INIT ${CMAKE_GENERATOR_CXX}) |
| ENDIF(NOT CMAKE_CXX_COMPILER_INIT) |
| ENDIF(CMAKE_GENERATOR_CXX) |
| |
| # finally list compilers to try |
| IF(CMAKE_CXX_COMPILER_INIT) |
| SET(CMAKE_CXX_COMPILER_LIST ${CMAKE_CXX_COMPILER_INIT}) |
| ELSE(CMAKE_CXX_COMPILER_INIT) |
| SET(CMAKE_CXX_COMPILER_LIST c++ g++ CC aCC cl bcc xlC) |
| ENDIF(CMAKE_CXX_COMPILER_INIT) |
| |
| # Find the compiler. |
| FIND_PROGRAM(CMAKE_CXX_COMPILER NAMES ${CMAKE_CXX_COMPILER_LIST} DOC "C++ compiler") |
| IF(CMAKE_CXX_COMPILER_INIT AND NOT CMAKE_CXX_COMPILER) |
| SET(CMAKE_CXX_COMPILER "${CMAKE_CXX_COMPILER_INIT}" CACHE FILEPATH "C++ compiler" FORCE) |
| ENDIF(CMAKE_CXX_COMPILER_INIT AND NOT CMAKE_CXX_COMPILER) |
| ENDIF(NOT CMAKE_CXX_COMPILER) |
| MARK_AS_ADVANCED(CMAKE_CXX_COMPILER) |
| |
| GET_FILENAME_COMPONENT(COMPILER_LOCATION "${CMAKE_CXX_COMPILER}" PATH) |
| |
| FIND_PROGRAM(CMAKE_AR NAMES ar PATHS ${COMPILER_LOCATION}) |
| MARK_AS_ADVANCED(CMAKE_AR) |
| |
| FIND_PROGRAM(CMAKE_RANLIB NAMES ranlib) |
| IF(NOT CMAKE_RANLIB) |
| SET(CMAKE_RANLIB : CACHE INTERNAL "noop for ranlib") |
| ENDIF(NOT CMAKE_RANLIB) |
| MARK_AS_ADVANCED(CMAKE_RANLIB) |
| |
| # do not test for GNU if the generator is visual studio |
| IF(${CMAKE_GENERATOR} MATCHES "Visual Studio") |
| SET(CMAKE_COMPILER_IS_GNUCXX_RUN 1) |
| ENDIF(${CMAKE_GENERATOR} MATCHES "Visual Studio") |
| |
| IF(NOT CMAKE_COMPILER_IS_GNUCXX_RUN) |
| # test to see if the cxx compiler is gnu |
| SET(CMAKE_COMPILER_IS_GNUCXX_RUN 1) |
| EXEC_PROGRAM(${CMAKE_CXX_COMPILER} ARGS -E "\"${CMAKE_ROOT}/Modules/CMakeTestGNU.c\"" OUTPUT_VARIABLE CMAKE_COMPILER_OUTPUT RETURN_VALUE CMAKE_COMPILER_RETURN) |
| IF(NOT CMAKE_COMPILER_RETURN) |
| IF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" ) |
| SET(CMAKE_COMPILER_IS_GNUCXX 1) |
| FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log |
| "Determining if the C++ compiler is GNU succeeded with " |
| "the following output:\n${CMAKE_COMPILER_OUTPUT}\n\n") |
| ELSE("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" ) |
| FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log |
| "Determining if the C++ compiler is GNU failed with " |
| "the following output:\n${CMAKE_COMPILER_OUTPUT}\n\n") |
| ENDIF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" ) |
| IF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_MINGW.*" ) |
| SET(CMAKE_COMPILER_IS_MINGW 1) |
| ENDIF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_MINGW.*" ) |
| IF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_CYGWIN.*" ) |
| SET(CMAKE_COMPILER_IS_CYGWIN 1) |
| ENDIF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_CYGWIN.*" ) |
| ENDIF(NOT CMAKE_COMPILER_RETURN) |
| ENDIF(NOT CMAKE_COMPILER_IS_GNUCXX_RUN) |
| |
| # configure all variables set in this file |
| CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in |
| ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeCXXCompiler.cmake IMMEDIATE) |
| |
| SET(CMAKE_CXX_COMPILER_ENV_VAR "CXX") |