55 lines
2.4 KiB
CMake
55 lines
2.4 KiB
CMake
# determine the compiler to use for C++ programs
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# NOTE, a generator may set CMAKE_CXX_COMPILER before
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# loading this file to force a compiler.
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# use environment variable CXX first if defined by user, next use
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# the cmake variable CMAKE_GENERATOR_CXX which can be defined by a generator
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# as a default compiler
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IF(NOT CMAKE_CXX_COMPILER)
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SET(CMAKE_CXX_COMPILER_INIT NOTFOUND)
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# if the user has specified CC via the environment, then use that without checking
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IF($ENV{CXX} MATCHES ".+")
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GET_FILENAME_COMPONENT(CMAKE_CXX_COMPILER_INIT $ENV{CXX} PROGRAM PROGRAM_ARGS CMAKE_CXX_FLAGS_ENV_INIT)
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IF(EXISTS ${CMAKE_CXX_COMPILER_INIT})
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ELSE(EXISTS ${CMAKE_CXX_COMPILER_INIT})
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MESSAGE(SEND_ERROR "Could not find compiler set in environment variable CXX:\n$ENV{CXX}.\n${CMAKE_CXX_COMPILER_INIT}")
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ENDIF(EXISTS ${CMAKE_CXX_COMPILER_INIT})
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ENDIF($ENV{CXX} MATCHES ".+")
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IF(CMAKE_GENERATOR_CXX)
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IF(NOT CMAKE_CXX_COMPILER_INIT)
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SET(CMAKE_CXX_COMPILER_INIT ${CMAKE_GENERATOR_CXX})
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ENDIF(NOT CMAKE_CXX_COMPILER_INIT)
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ENDIF(CMAKE_GENERATOR_CXX)
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IF(NOT CMAKE_CXX_COMPILER_INIT)
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# if not in the envionment then search for the compiler in the path
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SET(CMAKE_CXX_COMPILER_LIST c++ g++ CC aCC cl bcc )
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FIND_PROGRAM(CMAKE_CXX_COMPILER_FULLPATH NAMES ${CMAKE_CXX_COMPILER_LIST})
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GET_FILENAME_COMPONENT(CMAKE_CXX_COMPILER_INIT
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${CMAKE_CXX_COMPILER_FULLPATH} NAME)
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ENDIF(NOT CMAKE_CXX_COMPILER_INIT)
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SET(CMAKE_CXX_COMPILER ${CMAKE_CXX_COMPILER_INIT}
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CACHE STRING "C++ compiler")
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ENDIF(NOT CMAKE_CXX_COMPILER)
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MARK_AS_ADVANCED(CMAKE_CXX_COMPILER)
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# set this to notfound right after so that it is searched for each time this
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# file is included
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SET(CMAKE_CXX_COMPILER_FULLPATH NOTFOUND CACHE INTERNAL "full path to cxx compiler" FORCE)
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# test to see if the cxx compiler is gnu
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EXEC_PROGRAM(${CMAKE_CXX_COMPILER} ARGS -E ${CMAKE_ROOT}/Modules/CMakeTestGNU.c OUTPUT_VARIABLE CMAKE_COMPILER_OUTPUT RETURN_VALUE CMAKE_COMPILER_RETURN)
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IF(NOT CMAKE_COMPILER_RETURN)
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IF(${CMAKE_COMPILER_OUTPUT} MATCHES ".*THIS_IS_GNU.*" )
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SET(CMAKE_COMPILER_IS_GNUCXX 1)
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ENDIF(${CMAKE_COMPILER_OUTPUT} MATCHES ".*THIS_IS_GNU.*" )
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ENDIF(NOT CMAKE_COMPILER_RETURN)
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# configure all variables set in this file
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CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in
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${PROJECT_BINARY_DIR}/CMakeCXXCompiler.cmake IMMEDIATE)
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MARK_AS_ADVANCED(CMAKE_CXX_COMPILER_FULLPATH)
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