diff options
Diffstat (limited to 'Modules/CMakeDetermineCXXCompiler.cmake')
| -rw-r--r-- | Modules/CMakeDetermineCXXCompiler.cmake | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/Modules/CMakeDetermineCXXCompiler.cmake b/Modules/CMakeDetermineCXXCompiler.cmake new file mode 100644 index 0000000..2032015 --- /dev/null +++ b/Modules/CMakeDetermineCXXCompiler.cmake @@ -0,0 +1,184 @@ + +#============================================================================= +# Copyright 2002-2009 Kitware, Inc. +# +# Distributed under the OSI-approved BSD License (the "License"); +# see accompanying file Copyright.txt for details. +# +# This software is distributed WITHOUT ANY WARRANTY; without even the +# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +# See the License for more information. +#============================================================================= +# (To distribute this file outside of CMake, substitute the full +# License text for the above reference.) + +# determine the compiler to use for C++ programs +# NOTE, a generator may set CMAKE_CXX_COMPILER before +# loading this file to force a compiler. +# use environment variable CXX first if defined by user, next use +# the cmake variable CMAKE_GENERATOR_CXX 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_CXX_COMPILER +# CMAKE_COMPILER_IS_GNUCXX +# 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}-CXX OPTIONAL) +if(NOT CMAKE_CXX_COMPILER_NAMES) + set(CMAKE_CXX_COMPILER_NAMES CC) +endif() + +if(${CMAKE_GENERATOR} MATCHES "Visual Studio") +elseif("${CMAKE_GENERATOR}" MATCHES "Xcode") + set(CMAKE_CXX_COMPILER_XCODE_TYPE sourcecode.cpp.cpp) + _cmake_find_compiler_path(CXX) +else() + if(NOT CMAKE_CXX_COMPILER) + set(CMAKE_CXX_COMPILER_INIT NOTFOUND) + + # prefer the environment variable CXX + if(NOT $ENV{CXX} STREQUAL "") + get_filename_component(CMAKE_CXX_COMPILER_INIT $ENV{CXX} PROGRAM PROGRAM_ARGS CMAKE_CXX_FLAGS_ENV_INIT) + if(CMAKE_CXX_FLAGS_ENV_INIT) + set(CMAKE_CXX_COMPILER_ARG1 "${CMAKE_CXX_FLAGS_ENV_INIT}" CACHE STRING "First argument to CXX compiler") + endif() + if(NOT EXISTS ${CMAKE_CXX_COMPILER_INIT}) + message(FATAL_ERROR "Could not find compiler set in environment variable CXX:\n$ENV{CXX}.\n${CMAKE_CXX_COMPILER_INIT}") + endif() + endif() + + # next prefer the generator specified compiler + if(CMAKE_GENERATOR_CXX) + if(NOT CMAKE_CXX_COMPILER_INIT) + set(CMAKE_CXX_COMPILER_INIT ${CMAKE_GENERATOR_CXX}) + endif() + endif() + + # finally list compilers to try + if(NOT CMAKE_CXX_COMPILER_INIT) + set(CMAKE_CXX_COMPILER_LIST CC ${_CMAKE_TOOLCHAIN_PREFIX}c++ ${_CMAKE_TOOLCHAIN_PREFIX}g++ aCC cl bcc xlC clang++) + endif() + + _cmake_find_compiler(CXX) + else() + _cmake_find_compiler_path(CXX) + endif() + mark_as_advanced(CMAKE_CXX_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_CXX_COMPILER_ID_TEST_FLAGS_FIRST) + set(CMAKE_CXX_COMPILER_ID_TEST_FLAGS + # Try compiling to an object file only. + "-c" + ) +endif() + +# Build a small source file to identify the compiler. +if(NOT CMAKE_CXX_COMPILER_ID_RUN) + set(CMAKE_CXX_COMPILER_ID_RUN 1) + + # Try to identify the compiler. + set(CMAKE_CXX_COMPILER_ID) + file(READ ${CMAKE_ROOT}/Modules/CMakePlatformId.h.in + CMAKE_CXX_COMPILER_ID_PLATFORM_CONTENT) + + # The IAR compiler produces weird output. + # See http://www.cmake.org/Bug/view.php?id=10176#c19598 + list(APPEND CMAKE_CXX_COMPILER_ID_VENDORS IAR) + set(CMAKE_CXX_COMPILER_ID_VENDOR_FLAGS_IAR ) + set(CMAKE_CXX_COMPILER_ID_VENDOR_REGEX_IAR "IAR .+ Compiler") + + # Match the link line from xcodebuild output of the form + # Ld ... + # ... + # /path/to/cc ...CompilerIdCXX/... + # to extract the compiler front-end for the language. + set(CMAKE_CXX_COMPILER_ID_TOOL_MATCH_REGEX "\nLd[^\n]*(\n[ \t]+[^\n]*)*\n[ \t]+([^ \t\r\n]+)[^\r\n]*-o[^\r\n]*CompilerIdCXX/(\\./)?(CompilerIdCXX.xctest/)?CompilerIdCXX[ \t\n\\\"]") + set(CMAKE_CXX_COMPILER_ID_TOOL_MATCH_INDEX 2) + + include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake) + CMAKE_DETERMINE_COMPILER_ID(CXX CXXFLAGS CMakeCXXCompilerId.cpp) + + # Set old compiler and platform id variables. + if("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU") + set(CMAKE_COMPILER_IS_GNUCXX 1) + endif() + if("${CMAKE_CXX_PLATFORM_ID}" MATCHES "MinGW") + set(CMAKE_COMPILER_IS_MINGW 1) + elseif("${CMAKE_CXX_PLATFORM_ID}" MATCHES "Cygwin") + set(CMAKE_COMPILER_IS_CYGWIN 1) + endif() +endif() + +if (NOT _CMAKE_TOOLCHAIN_LOCATION) + get_filename_component(_CMAKE_TOOLCHAIN_LOCATION "${CMAKE_CXX_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("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang") + get_filename_component(COMPILER_BASENAME "${CMAKE_CXX_COMPILER}" NAME) + if (COMPILER_BASENAME MATCHES "^(.+-)(clan)?[gc]\\+\\+(-[0-9]+\\.[0-9]+\\.[0-9]+)?(\\.exe)?$") + set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1}) + elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang") + if(CMAKE_CXX_COMPILER_TARGET) + set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_CXX_COMPILER_TARGET}-) + endif() + elseif(COMPILER_BASENAME MATCHES "QCC(\\.exe)?$") + if(CMAKE_CXX_COMPILER_TARGET MATCHES "gcc_nto([^_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 ${CMAKE_MATCH_1}) + endif () + elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "TI") + # TI compilers are named e.g. cl6x, cl470 or armcl.exe + get_filename_component(COMPILER_BASENAME "${CMAKE_CXX_COMPILER}" NAME) + if (COMPILER_BASENAME MATCHES "^(.+)?cl([^.]+)?(\\.exe)?$") + set(_CMAKE_TOOLCHAIN_PREFIX "${CMAKE_MATCH_1}") + set(_CMAKE_TOOLCHAIN_SUFFIX "${CMAKE_MATCH_2}") + endif () + + endif() + +endif () + +include(CMakeFindBinUtils) +if(MSVC_CXX_ARCHITECTURE_ID) + include(${CMAKE_ROOT}/Modules/CMakeClDeps.cmake) + set(SET_MSVC_CXX_ARCHITECTURE_ID + "set(MSVC_CXX_ARCHITECTURE_ID ${MSVC_CXX_ARCHITECTURE_ID})") +endif() + +# configure all variables set in this file +configure_file(${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in + ${CMAKE_PLATFORM_INFO_DIR}/CMakeCXXCompiler.cmake + @ONLY + ) + +set(CMAKE_CXX_COMPILER_ENV_VAR "CXX") |