Editing: CMakeDetermineOBJCXXCompiler.cmake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying # file Copyright.txt or https://cmake.org/licensing for details. # determine the compiler to use for Objective-C++ programs # NOTE, a generator may set CMAKE_OBJCXX_COMPILER before # loading this file to force a compiler. # use environment variable OBJCXX first if defined by user, next use # the cmake variable CMAKE_GENERATOR_OBJCXX which can be defined by a generator # as a default compiler # If the internal cmake variable _CMAKE_TOOLCHAIN_PREFIX is set, this is used # as prefix for the tools (e.g. arm-elf-g++, arm-elf-ar etc.) # # Sets the following variables: # CMAKE_OBJCXX_COMPILER # CMAKE_COMPILER_IS_GNUOBJCXX # CMAKE_COMPILER_IS_CLANGOBJCXX # CMAKE_AR # CMAKE_RANLIB # # If not already set before, it also sets # _CMAKE_TOOLCHAIN_PREFIX include(${CMAKE_ROOT}/Modules/CMakeDetermineCompiler.cmake) # Load system-specific compiler preferences for this language. include(Platform/${CMAKE_SYSTEM_NAME}-Determine-OBJCXX OPTIONAL) include(Platform/${CMAKE_SYSTEM_NAME}-OBJCXX OPTIONAL) if(NOT CMAKE_OBJCXX_COMPILER_NAMES) set(CMAKE_OBJCXX_COMPILER_NAMES clang++) endif() if("${CMAKE_GENERATOR}" MATCHES "Xcode") set(CMAKE_OBJCXX_COMPILER_XCODE_TYPE sourcecode.cpp.objcpp) else() if(NOT CMAKE_OBJCXX_COMPILER) set(CMAKE_OBJCXX_COMPILER_INIT NOTFOUND) # prefer the environment variable OBJCXX or CXX foreach(var OBJCXX CXX) if($ENV{${var}} MATCHES ".+") get_filename_component(CMAKE_OBJCXX_COMPILER_INIT $ENV{${var}} PROGRAM PROGRAM_ARGS CMAKE_OBJCXX_FLAGS_ENV_INIT) if(CMAKE_OBJCXX_FLAGS_ENV_INIT) set(CMAKE_OBJCXX_COMPILER_ARG1 "${CMAKE_OBJCXX_FLAGS_ENV_INIT}" CACHE STRING "Arguments to Objective-C++ compiler") endif() if(NOT EXISTS ${CMAKE_OBJCXX_COMPILER_INIT}) message(FATAL_ERROR "Could not find compiler set in environment variable ${var}:\n $ENV{${var}}") endif() break() endif() endforeach() # next prefer the generator specified compiler if(CMAKE_GENERATOR_OBJCXX) if(NOT CMAKE_OBJCXX_COMPILER_INIT) set(CMAKE_OBJCXX_COMPILER_INIT ${CMAKE_GENERATOR_OBJCXX}) endif() endif() # finally list compilers to try if(NOT CMAKE_OBJCXX_COMPILER_INIT) set(CMAKE_OBJCXX_COMPILER_LIST ${_CMAKE_TOOLCHAIN_PREFIX}c++ ${_CMAKE_TOOLCHAIN_PREFIX}g++ clang++) endif() _cmake_find_compiler(OBJCXX) else() # we only get here if CMAKE_OBJCXX_COMPILER was specified using -D or a pre-made CMakeCache.txt # (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE # if CMAKE_OBJCXX_COMPILER is a list, use the first item as # CMAKE_OBJCXX_COMPILER and the rest as CMAKE_OBJCXX_COMPILER_ARG1 set(CMAKE_OBJCXX_COMPILER_ARG1 "${CMAKE_OBJCXX_COMPILER}") list(POP_FRONT CMAKE_OBJCXX_COMPILER_ARG1 CMAKE_OBJCXX_COMPILER) list(JOIN CMAKE_OBJCXX_COMPILER_ARG1 " " CMAKE_OBJCXX_COMPILER_ARG1) # 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 C compiler already had a path, reuse it for searching the CXX compiler get_filename_component(_CMAKE_USER_OBJCXX_COMPILER_PATH "${CMAKE_OBJCXX_COMPILER}" PATH) if(NOT _CMAKE_USER_OBJCXX_COMPILER_PATH) find_program(CMAKE_OBJCXX_COMPILER_WITH_PATH NAMES ${CMAKE_OBJCXX_COMPILER}) if(CMAKE_OBJCXX_COMPILER_WITH_PATH) set(CMAKE_OBJCXX_COMPILER ${CMAKE_OBJCXX_COMPILER_WITH_PATH} CACHE STRING "Objective-C++ compiler" FORCE) endif() unset(CMAKE_OBJCXX_COMPILER_WITH_PATH CACHE) endif() endif() mark_as_advanced(CMAKE_OBJCXX_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_OBJCXX_COMPILER_ID_TEST_FLAGS_FIRST) set(CMAKE_OBJCXX_COMPILER_ID_TEST_FLAGS # Try compiling to an object file only. "-c" # ARMClang need target options "--target=arm-arm-none-eabi -mcpu=cortex-m3" ) endif() # Build a small source file to identify the compiler. if(NOT CMAKE_OBJCXX_COMPILER_ID_RUN) set(CMAKE_OBJCXX_COMPILER_ID_RUN 1) # Try to identify the compiler. set(CMAKE_OBJCXX_COMPILER_ID) file(READ ${CMAKE_ROOT}/Modules/CMakePlatformId.h.in CMAKE_OBJCXX_COMPILER_ID_PLATFORM_CONTENT) # Match the link line from xcodebuild output of the form # Ld ... # ... # /path/to/cc ...CompilerIdOBJCXX/... # to extract the compiler front-end for the language. set(CMAKE_OBJCXX_COMPILER_ID_TOOL_MATCH_REGEX "\nLd[^\n]*(\n[ \t]+[^\n]*)*\n[ \t]+([^ \t\r\n]+)[^\r\n]*-o[^\r\n]*CompilerIdOBJCXX/(\\./)?(CompilerIdOBJCXX.(framework|xctest|build/[^ \t\r\n]+)/)?CompilerIdOBJCXX[ \t\n\\\"]") set(CMAKE_OBJCXX_COMPILER_ID_TOOL_MATCH_INDEX 2) include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake) CMAKE_DETERMINE_COMPILER_ID(OBJCXX OBJCXXFLAGS CMakeOBJCXXCompilerId.mm) # Set old compiler and platform id variables. if(CMAKE_OBJCXX_COMPILER_ID MATCHES "GNU") set(CMAKE_COMPILER_IS_GNUOBJCXX 1) endif() if(CMAKE_OBJCXX_COMPILER_ID MATCHES "Clang") set(CMAKE_COMPILER_IS_CLANGOBJCXX 1) endif() endif() if (NOT _CMAKE_TOOLCHAIN_LOCATION) get_filename_component(_CMAKE_TOOLCHAIN_LOCATION "${CMAKE_OBJCXX_COMPILER}" PATH) endif () # if we have a g++ cross compiler, they have usually some prefix, like # e.g. powerpc-linux-g++, arm-elf-g++ or i586-mingw32msvc-g++ , optionally # with a 3-component version number at the end (e.g. arm-eabi-gcc-4.5.2). # The other tools of the toolchain usually have the same prefix # NAME_WE cannot be used since then this test will fail for names like # "arm-unknown-nto-qnx6.3.0-gcc.exe", where BASENAME would be # "arm-unknown-nto-qnx6" instead of the correct "arm-unknown-nto-qnx6.3.0-" if (NOT _CMAKE_TOOLCHAIN_PREFIX) if("${CMAKE_OBJCXX_COMPILER_ID}" MATCHES "GNU|Clang|QCC") get_filename_component(COMPILER_BASENAME "${CMAKE_OBJCXX_COMPILER}" NAME) if (COMPILER_BASENAME MATCHES "^(.+-)(clan)?[gc]\\+\\+(-[0-9]+(\\.[0-9]+)*)?(-[^.]+)?(\\.exe)?$") set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1}) set(_CMAKE_COMPILER_SUFFIX ${CMAKE_MATCH_5}) elseif("${CMAKE_OBJCXX_COMPILER_ID}" MATCHES "Clang") if(CMAKE_OBJCXX_COMPILER_TARGET) set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_OBJCXX_COMPILER_TARGET}-) endif() elseif(COMPILER_BASENAME MATCHES "QCC(\\.exe)?$") if(CMAKE_OBJCXX_COMPILER_TARGET MATCHES "gcc_nto([a-z0-9]+_[0-9]+|[^_le]+)(le)") set(_CMAKE_TOOLCHAIN_PREFIX nto${CMAKE_MATCH_1}-) endif() endif () # if "llvm-" is part of the prefix, remove it, since llvm doesn't have its own binutils # but uses the regular ar, objcopy, etc. (instead of llvm-objcopy etc.) if ("${_CMAKE_TOOLCHAIN_PREFIX}" MATCHES "(.+-)?llvm-$") set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1}) endif () endif() endif () set(_CMAKE_PROCESSING_LANGUAGE "OBJCXX") include(CMakeFindBinUtils) include(Compiler/${CMAKE_OBJCXX_COMPILER_ID}-FindBinUtils OPTIONAL) unset(_CMAKE_PROCESSING_LANGUAGE) if(CMAKE_OBJCXX_COMPILER_ARCHITECTURE_ID) set(_SET_CMAKE_OBJCXX_COMPILER_ARCHITECTURE_ID "set(CMAKE_OBJCXX_COMPILER_ARCHITECTURE_ID ${CMAKE_OBJCXX_COMPILER_ARCHITECTURE_ID})") else() set(_SET_CMAKE_OBJCXX_COMPILER_ARCHITECTURE_ID "") endif() if(CMAKE_OBJCXX_XCODE_ARCHS) set(SET_CMAKE_XCODE_ARCHS "set(CMAKE_XCODE_ARCHS \"${CMAKE_OBJCXX_XCODE_ARCHS}\")") endif() # configure all variables set in this file configure_file(${CMAKE_ROOT}/Modules/CMakeOBJCXXCompiler.cmake.in ${CMAKE_PLATFORM_INFO_DIR}/CMakeOBJCXXCompiler.cmake @ONLY ) set(CMAKE_OBJCXX_COMPILER_ENV_VAR "OBJCXX")

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