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# 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 "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 ${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++ ${_CMAKE_TOOLCHAIN_PREFIX}g++ clang++)
endif()
_cmake_find_compiler(OBJCXX)
else()
# we only get here if CMAKE_OBJCXX_COMPILER was specified using -D or a pre-made CMakeCache.txt
# (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE
# if CMAKE_OBJCXX_COMPILER is a list of length 2, use the first item as
# CMAKE_OBJCXX_COMPILER and the 2nd one as CMAKE_OBJCXX_COMPILER_ARG1
list(LENGTH CMAKE_OBJCXX_COMPILER _CMAKE_OBJCXX_COMPILER_LIST_LENGTH)
if("${_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 ${CMAKE_ROOT}/Modules/CMakePlatformId.h.in
CMAKE_OBJCXX_COMPILER_ID_PLATFORM_CONTENT)
# Match the link line from xcodebuild output of the form
# Ld ...
# ...
# /path/to/cc ...CompilerIdOBJCXX/...
# to extract the compiler front-end for the language.
set(CMAKE_OBJCXX_COMPILER_ID_TOOL_MATCH_REGEX "\nLd[^\n]*(\n[ \t]+[^\n]*)*\n[ \t]+([^ \t\r\n]+)[^\r\n]*-o[^\r\n]*CompilerIdOBJCXX/(\\./)?(CompilerIdOBJCXX.(framework|xctest|build/[^ \t\r\n]+)/)?CompilerIdOBJCXX[ \t\n\\\"]")
set(CMAKE_OBJCXX_COMPILER_ID_TOOL_MATCH_INDEX 2)
include(${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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