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131 lines
5.2 KiB
131 lines
5.2 KiB
include(Compiler/Clang)
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__compiler_clang(CXX)
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if("x${CMAKE_CXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
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set(CMAKE_CXX_COMPILE_OPTIONS_VISIBILITY_INLINES_HIDDEN "-fvisibility-inlines-hidden")
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endif()
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cmake_policy(GET CMP0025 appleClangPolicy)
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if(APPLE AND NOT appleClangPolicy STREQUAL NEW)
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return()
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endif()
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if("x${CMAKE_CXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
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if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 2.1)
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set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "-std=c++98")
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set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "-std=gnu++98")
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endif()
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if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.1)
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set(CMAKE_CXX98_STANDARD__HAS_FULL_SUPPORT ON)
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set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++11")
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set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++11")
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set(CMAKE_CXX11_STANDARD__HAS_FULL_SUPPORT ON)
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elseif(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 2.1)
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set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++0x")
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set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++0x")
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endif()
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if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.5)
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set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++14")
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set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++14")
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set(CMAKE_CXX14_STANDARD__HAS_FULL_SUPPORT ON)
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elseif(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.4)
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set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++1y")
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set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++1y")
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set(CMAKE_CXX14_STANDARD__HAS_FULL_SUPPORT ON)
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endif()
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set(_clang_version_std17 5.0)
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if(CMAKE_SYSTEM_NAME STREQUAL "Android")
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set(_clang_version_std17 6.0)
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endif()
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if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS "${_clang_version_std17}")
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set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std=c++17")
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set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std=gnu++17")
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elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.5)
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set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std=c++1z")
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set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std=gnu++1z")
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endif()
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if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS "${_clang_version_std17}")
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set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std=c++2a")
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set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std=gnu++2a")
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endif()
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unset(_clang_version_std17)
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if("x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
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# The MSVC standard library requires C++14, and MSVC itself has no
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# notion of operating in a mode not aware of at least that standard.
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set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "-std=c++14")
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set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "-std=gnu++14")
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set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++14")
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set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++14")
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# This clang++ is missing some features because of MSVC compatibility.
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unset(CMAKE_CXX11_STANDARD__HAS_FULL_SUPPORT)
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unset(CMAKE_CXX14_STANDARD__HAS_FULL_SUPPORT)
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unset(CMAKE_CXX17_STANDARD__HAS_FULL_SUPPORT)
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unset(CMAKE_CXX20_STANDARD__HAS_FULL_SUPPORT)
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endif()
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__compiler_check_default_language_standard(CXX 2.1 98)
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elseif(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 3.9
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AND CMAKE_CXX_SIMULATE_VERSION VERSION_GREATER_EQUAL 19.0)
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# This version of clang-cl and the MSVC version it simulates have
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# support for -std: flags.
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set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX98_STANDARD__HAS_FULL_SUPPORT ON)
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set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std:c++14")
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set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std:c++14")
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if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 6.0)
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set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std:c++17")
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set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std:c++17")
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set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std:c++latest")
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set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std:c++latest")
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else()
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set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std:c++latest")
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set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std:c++latest")
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endif()
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__compiler_check_default_language_standard(CXX 3.9 14)
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else()
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# This version of clang-cl, or the MSVC version it simulates, does not have
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# language standards. Set these options as empty strings so the feature
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# test infrastructure can at least check to see if they are defined.
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set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "")
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set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "")
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# There is no meaningful default for this
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set(CMAKE_CXX_STANDARD_DEFAULT "")
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# There are no compiler modes so we only need to test features once.
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# Override the default macro for this special case. Pretend that
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# all language standards are available so that at least compilation
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# can be attempted.
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macro(cmake_record_cxx_compile_features)
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list(APPEND CMAKE_CXX_COMPILE_FEATURES
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cxx_std_98
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cxx_std_11
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cxx_std_14
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cxx_std_17
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cxx_std_20
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)
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_record_compiler_features(CXX "" CMAKE_CXX_COMPILE_FEATURES)
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endmacro()
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endif()
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