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Diffstat (limited to 'Modules/CMakeDetermineOBJCXXCompiler.cmake')
| -rw-r--r-- | Modules/CMakeDetermineOBJCXXCompiler.cmake | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/Modules/CMakeDetermineOBJCXXCompiler.cmake b/Modules/CMakeDetermineOBJCXXCompiler.cmake new file mode 100644 index 0000000..60fcbb3 --- /dev/null +++ b/Modules/CMakeDetermineOBJCXXCompiler.cmake @@ -0,0 +1,197 @@ +# 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 + if($ENV{OBJCXX} MATCHES ".+") + get_filename_component(CMAKE_OBJCXX_COMPILER_INIT $ENV{OBJCXX} PROGRAM PROGRAM_ARGS CMAKE_OBJCXX_FLAGS_ENV_INIT) + if(CMAKE_OBJCXX_FLAGS_ENV_INIT) + set(CMAKE_OBJCXX_COMPILER_ARG1 "${CMAKE_OBJCXX_FLAGS_ENV_INIT}" CACHE STRING "First argument to Objective-C++ compiler") + endif() + if(NOT EXISTS ${CMAKE_OBJCXX_COMPILER_INIT}) + message(FATAL_ERROR "Could not find compiler set in environment variable OBJCXX:\n$ENV{OBJCXX}.\n${CMAKE_OBJCXX_COMPILER_INIT}") + endif() + endif() + + # 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++ ${_CMAKE_TOOLCHAIN_PREFIX}g++ clang++) + endif() + + _cmake_find_compiler(OBJCXX) + + else() + # we only get here if CMAKE_OBJCXX_COMPILER was specified using -D or a pre-made CMakeCache.txt + # (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE + # if CMAKE_OBJCXX_COMPILER is a list of length 2, use the first item as + # CMAKE_OBJCXX_COMPILER and the 2nd one as CMAKE_OBJCXX_COMPILER_ARG1 + + list(LENGTH CMAKE_OBJCXX_COMPILER _CMAKE_OBJCXX_COMPILER_LIST_LENGTH) + if("${_CMAKE_OBJCXX_COMPILER_LIST_LENGTH}" EQUAL 2) + list(GET CMAKE_OBJCXX_COMPILER 1 CMAKE_OBJCXX_COMPILER_ARG1) + list(GET CMAKE_OBJCXX_COMPILER 0 CMAKE_OBJCXX_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 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 ${CMAKE_ROOT}/Modules/CMakePlatformId.h.in + CMAKE_OBJCXX_COMPILER_ID_PLATFORM_CONTENT) + + # Match the link line from xcodebuild output of the form + # Ld ... + # ... + # /path/to/cc ...CompilerIdOBJCXX/... + # to extract the compiler front-end for the language. + set(CMAKE_OBJCXX_COMPILER_ID_TOOL_MATCH_REGEX "\nLd[^\n]*(\n[ \t]+[^\n]*)*\n[ \t]+([^ \t\r\n]+)[^\r\n]*-o[^\r\n]*CompilerIdOBJCXX/(\\./)?(CompilerIdOBJCXX.(framework|xctest)/)?CompilerIdOBJCXX[ \t\n\\\"]") + set(CMAKE_OBJCXX_COMPILER_ID_TOOL_MATCH_INDEX 2) + + include(${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 "${CMAKE_OBJCXX_COMPILER}" PATH) +endif () + +# if we have a g++ cross compiler, they have usually some prefix, like +# e.g. powerpc-linux-g++, arm-elf-g++ or i586-mingw32msvc-g++ , optionally +# with a 3-component version number at the end (e.g. arm-eabi-gcc-4.5.2). +# The other tools of the toolchain usually have the same prefix +# NAME_WE cannot be used since then this test will fail for names like +# "arm-unknown-nto-qnx6.3.0-gcc.exe", where BASENAME would be +# "arm-unknown-nto-qnx6" instead of the correct "arm-unknown-nto-qnx6.3.0-" + + +if (CMAKE_CROSSCOMPILING AND NOT _CMAKE_TOOLCHAIN_PREFIX) + + if("${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") |