73 lines
3.3 KiB
CMake
73 lines
3.3 KiB
CMake
|
|
# 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)
|
|
|
|
# if no compiler has been found yet, then try to find one
|
|
IF(NOT CMAKE_CXX_COMPILER_INIT)
|
|
# if not in the envionment then search for the compiler in the path
|
|
SET(CMAKE_CXX_COMPILER_LIST c++ g++ CC aCC cl bcc xlC)
|
|
FIND_PROGRAM(CMAKE_CXX_COMPILER_FULLPATH NAMES ${CMAKE_CXX_COMPILER_LIST})
|
|
GET_FILENAME_COMPONENT(CMAKE_CXX_COMPILER_INIT
|
|
${CMAKE_CXX_COMPILER_FULLPATH} NAME)
|
|
SET(CMAKE_CXX_COMPILER_FULLPATH "${CMAKE_CXX_COMPILER_FULLPATH}" CACHE INTERNAL "full path to the compiler cmake found")
|
|
ENDIF(NOT CMAKE_CXX_COMPILER_INIT)
|
|
SET(CMAKE_CXX_COMPILER ${CMAKE_CXX_COMPILER_INIT}
|
|
CACHE STRING "C++ compiler")
|
|
ENDIF(NOT CMAKE_CXX_COMPILER)
|
|
MARK_AS_ADVANCED(CMAKE_CXX_COMPILER)
|
|
|
|
# do not test for GNU if the generator is visual studio
|
|
IF(${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 ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeOutput.log
|
|
"Determining if the C++ compiler is GNU succeeded with "
|
|
"the following output:\n${CMAKE_COMPILER_OUTPUT}\n\n")
|
|
ELSE("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" )
|
|
FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeOutput.log
|
|
"Determining if the C++ compiler is GNU failed with "
|
|
"the following output:\n${CMAKE_COMPILER_OUTPUT}\n\n")
|
|
ENDIF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" )
|
|
ENDIF(NOT CMAKE_COMPILER_RETURN)
|
|
ENDIF(NOT CMAKE_COMPILER_IS_GNUCXX_RUN)
|
|
|
|
# configure all variables set in this file
|
|
CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in
|
|
${CMAKE_BINARY_DIR}/CMakeFiles/CMakeCXXCompiler.cmake IMMEDIATE)
|
|
|
|
SET(CMAKE_CXX_COMPILER_ENV_VAR "CXX")
|