mirror of
https://github.com/Kitware/CMake.git
synced 2026-01-05 13:20:47 -06:00
50e57aa4ca
Variables such as CMAKE_COMPILER_IS_GNUCC are documented as obsolete/deprecated and ideally shouldn't be used in the code anymore to have clearer compiler identifications. In the past QCC compiler was identified as GNU and also had this variable set to 1 (see policy CMP0047). Same still applies for LCC compiler (see policy CMP0129).
189 lines
7.3 KiB
CMake
189 lines
7.3 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
|
# file LICENSE.rst 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_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_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")
|