109 lines
4.1 KiB
CMake
109 lines
4.1 KiB
CMake
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# 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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#
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# Sets the following variables:
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# CMAKE_CXX_COMPILER
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# CMAKE_COMPILER_IS_GNUCXX
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# CMAKE_AR
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# CMAKE_RANLIB
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IF(NOT CMAKE_CXX_COMPILER)
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SET(CMAKE_CXX_COMPILER_INIT NOTFOUND)
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# prefer the environment variable CXX
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IF($ENV{CXX} MATCHES ".+")
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GET_FILENAME_COMPONENT(CMAKE_CXX_COMPILER_INIT $ENV{CXX} PROGRAM PROGRAM_ARGS CMAKE_CXX_FLAGS_ENV_INIT)
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IF(CMAKE_CXX_FLAGS_ENV_INIT)
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SET(CMAKE_CXX_COMPILER_ARG1 "${CMAKE_CXX_FLAGS_ENV_INIT}" CACHE STRING "First argument to CXX compiler")
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ENDIF(CMAKE_CXX_FLAGS_ENV_INIT)
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IF(EXISTS ${CMAKE_CXX_COMPILER_INIT})
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ELSE(EXISTS ${CMAKE_CXX_COMPILER_INIT})
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MESSAGE(FATAL_ERROR "Could not find compiler set in environment variable CXX:\n$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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# next prefer the generator specified compiler
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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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# finally list compilers to try
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IF(CMAKE_CXX_COMPILER_INIT)
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SET(CMAKE_CXX_COMPILER_LIST ${CMAKE_CXX_COMPILER_INIT})
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ELSE(CMAKE_CXX_COMPILER_INIT)
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SET(CMAKE_CXX_COMPILER_LIST c++ g++ CC aCC cl bcc xlC)
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ENDIF(CMAKE_CXX_COMPILER_INIT)
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# Find the compiler.
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FIND_PROGRAM(CMAKE_CXX_COMPILER NAMES ${CMAKE_CXX_COMPILER_LIST} DOC "C++ compiler")
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IF(CMAKE_CXX_COMPILER_INIT AND NOT CMAKE_CXX_COMPILER)
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SET(CMAKE_CXX_COMPILER "${CMAKE_CXX_COMPILER_INIT}" CACHE FILEPATH "C++ compiler" FORCE)
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ENDIF(CMAKE_CXX_COMPILER_INIT AND NOT CMAKE_CXX_COMPILER)
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ENDIF(NOT CMAKE_CXX_COMPILER)
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MARK_AS_ADVANCED(CMAKE_CXX_COMPILER)
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GET_FILENAME_COMPONENT(COMPILER_LOCATION "${CMAKE_CXX_COMPILER}" PATH)
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FIND_PROGRAM(CMAKE_AR NAMES ar PATHS ${COMPILER_LOCATION})
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MARK_AS_ADVANCED(CMAKE_AR)
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FIND_PROGRAM(CMAKE_RANLIB NAMES ranlib)
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IF(NOT CMAKE_RANLIB)
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SET(CMAKE_RANLIB : CACHE INTERNAL "noop for ranlib")
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ENDIF(NOT CMAKE_RANLIB)
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MARK_AS_ADVANCED(CMAKE_RANLIB)
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# This block was used before the compiler was identified by building a
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# source file. Unless g++ crashes when building a small C++
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# executable this should no longer be needed.
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#
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# The g++ that comes with BeOS 5 segfaults if you run "g++ -E"
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# ("gcc -E" is fine), which throws up a system dialog box that hangs cmake
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# until the user clicks "OK"...so for now, we just assume it's g++.
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# IF(BEOS)
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# SET(CMAKE_COMPILER_IS_GNUCXX 1)
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# SET(CMAKE_COMPILER_IS_GNUCXX_RUN 1)
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# ENDIF(BEOS)
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# Build a small source file to identify the compiler.
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IF(${CMAKE_GENERATOR} MATCHES "Visual Studio")
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SET(CMAKE_CXX_COMPILER_ID_RUN 1)
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SET(CMAKE_CXX_PLATFORM_ID "Windows")
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# TODO: Set the compiler id. It is probably MSVC but
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# the user may be using an integrated Intel compiler.
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# SET(CMAKE_CXX_COMPILER_ID "MSVC")
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ENDIF(${CMAKE_GENERATOR} MATCHES "Visual Studio")
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IF(NOT CMAKE_CXX_COMPILER_ID_RUN)
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SET(CMAKE_CXX_COMPILER_ID_RUN 1)
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# Try to identify the compiler.
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SET(CMAKE_CXX_COMPILER_ID)
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INCLUDE(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
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CMAKE_DETERMINE_COMPILER_ID(CXX ${CMAKE_ROOT}/Modules/CMakeCXXCompilerId.cpp)
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# Set old compiler and platform id variables.
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IF("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
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SET(CMAKE_COMPILER_IS_GNUCXX 1)
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ENDIF("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
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IF("${CMAKE_CXX_PLATFORM_ID}" MATCHES "MinGW")
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SET(CMAKE_COMPILER_IS_MINGW 1)
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ELSEIF("${CMAKE_CXX_PLATFORM_ID}" MATCHES "Cygwin")
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SET(CMAKE_COMPILER_IS_CYGWIN 1)
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ENDIF("${CMAKE_CXX_PLATFORM_ID}" MATCHES "MinGW")
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ENDIF(NOT CMAKE_CXX_COMPILER_ID_RUN)
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# configure all variables set in this file
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CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeCXXCompiler.cmake IMMEDIATE)
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SET(CMAKE_CXX_COMPILER_ENV_VAR "CXX")
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