diff options
Diffstat (limited to 'Modules/CMakeDetermineCXXCompiler.cmake')
| -rw-r--r-- | Modules/CMakeDetermineCXXCompiler.cmake | 236 |
1 files changed, 110 insertions, 126 deletions
diff --git a/Modules/CMakeDetermineCXXCompiler.cmake b/Modules/CMakeDetermineCXXCompiler.cmake index 7f8f3ec8b..59da3e60d 100644 --- a/Modules/CMakeDetermineCXXCompiler.cmake +++ b/Modules/CMakeDetermineCXXCompiler.cmake @@ -30,123 +30,109 @@ # If not already set before, it also sets # _CMAKE_TOOLCHAIN_PREFIX -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(NOT 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(NOT 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 ${_CMAKE_TOOLCHAIN_PREFIX}c++ ${_CMAKE_TOOLCHAIN_PREFIX}g++ CC aCC cl bcc xlC) - ENDIF(CMAKE_CXX_COMPILER_INIT) - - # Find the compiler. - IF (_CMAKE_USER_C_COMPILER_PATH) - FIND_PROGRAM(CMAKE_CXX_COMPILER NAMES ${CMAKE_CXX_COMPILER_LIST} PATHS ${_CMAKE_USER_C_COMPILER_PATH} DOC "C++ compiler" NO_DEFAULT_PATH) - ENDIF (_CMAKE_USER_C_COMPILER_PATH) - 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) -ELSE(NOT CMAKE_CXX_COMPILER) - -# we only get here if CMAKE_CXX_COMPILER was specified using -D or a pre-made CMakeCache.txt -# (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE -# -# if CMAKE_CXX_COMPILER is a list of length 2, use the first item as -# CMAKE_CXX_COMPILER and the 2nd one as CMAKE_CXX_COMPILER_ARG1 - - LIST(LENGTH CMAKE_CXX_COMPILER _CMAKE_CXX_COMPILER_LIST_LENGTH) - IF("${_CMAKE_CXX_COMPILER_LIST_LENGTH}" EQUAL 2) - LIST(GET CMAKE_CXX_COMPILER 1 CMAKE_CXX_COMPILER_ARG1) - LIST(GET CMAKE_CXX_COMPILER 0 CMAKE_CXX_COMPILER) - ENDIF("${_CMAKE_CXX_COMPILER_LIST_LENGTH}" EQUAL 2) - -# if a compiler was specified by the user but without path, -# now try to find it with the full path -# if it is found, force it into the cache, -# if not, don't overwrite the setting (which was given by the user) with "NOTFOUND" -# if the CXX compiler already had a path, reuse it for searching the C compiler - GET_FILENAME_COMPONENT(_CMAKE_USER_CXX_COMPILER_PATH "${CMAKE_CXX_COMPILER}" PATH) - IF(NOT _CMAKE_USER_CXX_COMPILER_PATH) - FIND_PROGRAM(CMAKE_CXX_COMPILER_WITH_PATH NAMES ${CMAKE_CXX_COMPILER}) - MARK_AS_ADVANCED(CMAKE_CXX_COMPILER_WITH_PATH) - IF(CMAKE_CXX_COMPILER_WITH_PATH) - SET(CMAKE_CXX_COMPILER ${CMAKE_CXX_COMPILER_WITH_PATH} CACHE STRING "CXX compiler" FORCE) - ENDIF(CMAKE_CXX_COMPILER_WITH_PATH) - ENDIF(NOT _CMAKE_USER_CXX_COMPILER_PATH) -ENDIF(NOT CMAKE_CXX_COMPILER) -MARK_AS_ADVANCED(CMAKE_CXX_COMPILER) - -IF (NOT _CMAKE_TOOLCHAIN_LOCATION) - GET_FILENAME_COMPONENT(_CMAKE_TOOLCHAIN_LOCATION "${CMAKE_CXX_COMPILER}" PATH) -ENDIF (NOT _CMAKE_TOOLCHAIN_LOCATION) - -# This block was used before the compiler was identified by building a -# source file. Unless g++ crashes when building a small C++ -# executable this should no longer be needed. -# -# The g++ that comes with BeOS 5 segfaults if you run "g++ -E" -# ("gcc -E" is fine), which throws up a system dialog box that hangs cmake -# until the user clicks "OK"...so for now, we just assume it's g++. -# IF(BEOS) -# SET(CMAKE_COMPILER_IS_GNUCXX 1) -# SET(CMAKE_COMPILER_IS_GNUCXX_RUN 1) -# ENDIF(BEOS) - -# Build a small source file to identify the compiler. -IF(${CMAKE_GENERATOR} MATCHES "Visual Studio") - SET(CMAKE_CXX_COMPILER_ID_RUN 1) - SET(CMAKE_CXX_PLATFORM_ID "Windows") - SET(CMAKE_CXX_COMPILER_ID "MSVC") -ENDIF(${CMAKE_GENERATOR} MATCHES "Visual Studio") -IF(NOT CMAKE_CXX_COMPILER_ID_RUN) - SET(CMAKE_CXX_COMPILER_ID_RUN 1) +include(${CMAKE_ROOT}/Modules/CMakeDetermineCompiler.cmake) + +# Load system-specific compiler preferences for this language. +include(Platform/${CMAKE_SYSTEM_NAME}-CXX OPTIONAL) +if(NOT CMAKE_CXX_COMPILER_NAMES) + set(CMAKE_CXX_COMPILER_NAMES CC) +endif() + +if(${CMAKE_GENERATOR} MATCHES "Visual Studio") +elseif("${CMAKE_GENERATOR}" MATCHES "Xcode") + set(CMAKE_CXX_COMPILER_XCODE_TYPE sourcecode.cpp.cpp) +else() + 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() + if(NOT 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() + endif() + + # 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() + endif() + + # finally list compilers to try + if(NOT CMAKE_CXX_COMPILER_INIT) + set(CMAKE_CXX_COMPILER_LIST CC ${_CMAKE_TOOLCHAIN_PREFIX}c++ ${_CMAKE_TOOLCHAIN_PREFIX}g++ aCC cl bcc xlC clang++) + endif() + + _cmake_find_compiler(CXX) + else() + + # we only get here if CMAKE_CXX_COMPILER was specified using -D or a pre-made CMakeCache.txt + # (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE + # + # if CMAKE_CXX_COMPILER is a list of length 2, use the first item as + # CMAKE_CXX_COMPILER and the 2nd one as CMAKE_CXX_COMPILER_ARG1 + + list(LENGTH CMAKE_CXX_COMPILER _CMAKE_CXX_COMPILER_LIST_LENGTH) + if("${_CMAKE_CXX_COMPILER_LIST_LENGTH}" EQUAL 2) + list(GET CMAKE_CXX_COMPILER 1 CMAKE_CXX_COMPILER_ARG1) + list(GET CMAKE_CXX_COMPILER 0 CMAKE_CXX_COMPILER) + endif() + + # if a compiler was specified by the user but without path, + # now try to find it with the full path + # if it is found, force it into the cache, + # if not, don't overwrite the setting (which was given by the user) with "NOTFOUND" + # if the CXX compiler already had a path, reuse it for searching the C compiler + get_filename_component(_CMAKE_USER_CXX_COMPILER_PATH "${CMAKE_CXX_COMPILER}" PATH) + if(NOT _CMAKE_USER_CXX_COMPILER_PATH) + find_program(CMAKE_CXX_COMPILER_WITH_PATH NAMES ${CMAKE_CXX_COMPILER}) + mark_as_advanced(CMAKE_CXX_COMPILER_WITH_PATH) + if(CMAKE_CXX_COMPILER_WITH_PATH) + set(CMAKE_CXX_COMPILER ${CMAKE_CXX_COMPILER_WITH_PATH} CACHE STRING "CXX compiler" FORCE) + endif() + endif() + endif() + mark_as_advanced(CMAKE_CXX_COMPILER) # Each entry in this list is a set of extra flags to try # adding to the compile line to see if it helps produce # a valid identification file. - SET(CMAKE_CXX_COMPILER_ID_TEST_FLAGS + set(CMAKE_CXX_COMPILER_ID_TEST_FLAGS # Try compiling to an object file only. "-c" ) +endif() + +# Build a small source file to identify the compiler. +if(NOT CMAKE_CXX_COMPILER_ID_RUN) + set(CMAKE_CXX_COMPILER_ID_RUN 1) # Try to identify the compiler. - SET(CMAKE_CXX_COMPILER_ID) - FILE(READ ${CMAKE_ROOT}/Modules/CMakePlatformId.h.in + set(CMAKE_CXX_COMPILER_ID) + file(READ ${CMAKE_ROOT}/Modules/CMakePlatformId.h.in CMAKE_CXX_COMPILER_ID_PLATFORM_CONTENT) - INCLUDE(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake) + include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake) CMAKE_DETERMINE_COMPILER_ID(CXX CXXFLAGS CMakeCXXCompilerId.cpp) # Set old compiler and platform id variables. - IF("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU") - SET(CMAKE_COMPILER_IS_GNUCXX 1) - ENDIF("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU") - IF("${CMAKE_CXX_PLATFORM_ID}" MATCHES "MinGW") - SET(CMAKE_COMPILER_IS_MINGW 1) - ELSEIF("${CMAKE_CXX_PLATFORM_ID}" MATCHES "Cygwin") - SET(CMAKE_COMPILER_IS_CYGWIN 1) - ENDIF("${CMAKE_CXX_PLATFORM_ID}" MATCHES "MinGW") -ENDIF(NOT CMAKE_CXX_COMPILER_ID_RUN) + if("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU") + set(CMAKE_COMPILER_IS_GNUCXX 1) + endif() + if("${CMAKE_CXX_PLATFORM_ID}" MATCHES "MinGW") + set(CMAKE_COMPILER_IS_MINGW 1) + elseif("${CMAKE_CXX_PLATFORM_ID}" MATCHES "Cygwin") + set(CMAKE_COMPILER_IS_CYGWIN 1) + endif() +endif() + +if (NOT _CMAKE_TOOLCHAIN_LOCATION) + get_filename_component(_CMAKE_TOOLCHAIN_LOCATION "${CMAKE_CXX_COMPILER}" PATH) +endif () # if we have a g++ cross compiler, they have usually some prefix, like # e.g. powerpc-linux-g++, arm-elf-g++ or i586-mingw32msvc-g++ , optionally @@ -155,34 +141,32 @@ ENDIF(NOT CMAKE_CXX_COMPILER_ID_RUN) # NAME_WE cannot be used since then this test will fail for names lile # "arm-unknown-nto-qnx6.3.0-gcc.exe", where BASENAME would be # "arm-unknown-nto-qnx6" instead of the correct "arm-unknown-nto-qnx6.3.0-" -IF (CMAKE_CROSSCOMPILING +if (CMAKE_CROSSCOMPILING AND "${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU" AND NOT _CMAKE_TOOLCHAIN_PREFIX) - GET_FILENAME_COMPONENT(COMPILER_BASENAME "${CMAKE_CXX_COMPILER}" NAME) - IF (COMPILER_BASENAME MATCHES "^(.+-)[gc]\\+\\+(-[0-9]+\\.[0-9]+\\.[0-9]+)?(\\.exe)?$") - SET(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1}) - ENDIF (COMPILER_BASENAME MATCHES "^(.+-)[gc]\\+\\+(-[0-9]+\\.[0-9]+\\.[0-9]+)?(\\.exe)?$") + get_filename_component(COMPILER_BASENAME "${CMAKE_CXX_COMPILER}" NAME) + if (COMPILER_BASENAME MATCHES "^(.+-)[gc]\\+\\+(-[0-9]+\\.[0-9]+\\.[0-9]+)?(\\.exe)?$") + set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1}) + endif () # if "llvm-" is part of the prefix, remove it, since llvm doesn't have its own binutils # but uses the regular ar, objcopy, etc. (instead of llvm-objcopy etc.) - IF ("${_CMAKE_TOOLCHAIN_PREFIX}" MATCHES "(.+-)?llvm-$") - SET(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1}) - ENDIF ("${_CMAKE_TOOLCHAIN_PREFIX}" MATCHES "(.+-)?llvm-$") - -ENDIF (CMAKE_CROSSCOMPILING - AND "${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU" - AND NOT _CMAKE_TOOLCHAIN_PREFIX) - -INCLUDE(${CMAKE_ROOT}/Modules/CMakeClDeps.cmake) -INCLUDE(CMakeFindBinUtils) -IF(MSVC_CXX_ARCHITECTURE_ID) - SET(SET_MSVC_CXX_ARCHITECTURE_ID - "SET(MSVC_CXX_ARCHITECTURE_ID ${MSVC_CXX_ARCHITECTURE_ID})") -ENDIF(MSVC_CXX_ARCHITECTURE_ID) + if ("${_CMAKE_TOOLCHAIN_PREFIX}" MATCHES "(.+-)?llvm-$") + set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1}) + endif () + +endif () + +include(${CMAKE_ROOT}/Modules/CMakeClDeps.cmake) +include(CMakeFindBinUtils) +if(MSVC_CXX_ARCHITECTURE_ID) + set(SET_MSVC_CXX_ARCHITECTURE_ID + "set(MSVC_CXX_ARCHITECTURE_ID ${MSVC_CXX_ARCHITECTURE_ID})") +endif() # configure all variables set in this file -CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in - ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeCXXCompiler.cmake +configure_file(${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in + ${CMAKE_PLATFORM_INFO_DIR}/CMakeCXXCompiler.cmake @ONLY IMMEDIATE # IMMEDIATE must be here for compatibility mode <= 2.0 ) -SET(CMAKE_CXX_COMPILER_ENV_VAR "CXX") +set(CMAKE_CXX_COMPILER_ENV_VAR "CXX") |