Clang-CXX.cmake 2.66 KB
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include(Compiler/Clang)
__compiler_clang(CXX)
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if(NOT "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
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  set(CMAKE_CXX_COMPILE_OPTIONS_VISIBILITY_INLINES_HIDDEN "-fvisibility-inlines-hidden")
endif()
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cmake_policy(GET CMP0025 appleClangPolicy)
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if(APPLE AND NOT appleClangPolicy STREQUAL NEW)
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  return()
endif()
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if(NOT "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
  if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 2.1)
    set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "-std=c++98")
    set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "-std=gnu++98")
  endif()
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  if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.1)
    set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++11")
    set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++11")
  elseif(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 2.1)
    set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++0x")
    set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++0x")
  endif()
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  if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.5)
    set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++14")
    set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++14")
  elseif(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.4)
    set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++1y")
    set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++1y")
  endif()
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  set(_clang_version_std17 5.0)
  if(CMAKE_SYSTEM_NAME STREQUAL "Android")
    set(_clang_version_std17 6.0)
  endif()

  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS "${_clang_version_std17}")
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    set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std=c++17")
    set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std=gnu++17")
  elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.5)
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    set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std=c++1z")
    set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std=gnu++1z")
  endif()
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  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS "${_clang_version_std17}")
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    set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std=c++2a")
    set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std=gnu++2a")
  endif()
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  unset(_clang_version_std17)
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else()
  # clang-cl does not know these options because it behaves like cl.exe
  set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "")
  set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "")
  set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "")
  set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "")
  set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "")
  set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "")
  set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "")
  set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "")
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  set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "")
  set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "")
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endif()

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if(NOT "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
  __compiler_check_default_language_standard(CXX 2.1 98)
else()
  set(CMAKE_CXX_STANDARD_DEFAULT "")
endif()