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