include(Compiler/Clang)
__compiler_clang(CXX)

if(NOT "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
  set(CMAKE_CXX_COMPILE_OPTIONS_VISIBILITY_INLINES_HIDDEN "-fvisibility-inlines-hidden")
endif()

cmake_policy(GET CMP0025 appleClangPolicy)
if(APPLE AND NOT appleClangPolicy STREQUAL NEW)
  return()
endif()

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()

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()

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()

if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.5)
  set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std=c++1z")
  set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std=gnu++1z")
endif()

__compiler_check_default_language_standard(CXX 3.1 98)

macro(cmake_record_cxx_compile_features)
  set(_result 0)
  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.1)
    if(_result EQUAL 0 AND CMAKE_CXX17_STANDARD_COMPILE_OPTION)
      _record_compiler_features_cxx(17)
    endif()
    if(_result EQUAL 0 AND CMAKE_CXX14_STANDARD_COMPILE_OPTION)
      _record_compiler_features_cxx(14)
    endif()
    if (_result EQUAL 0 AND CMAKE_CXX11_STANDARD_COMPILE_OPTION)
      _record_compiler_features_cxx(11)
    endif()
    if (_result EQUAL 0)
      _record_compiler_features_cxx(98)
    endif()
  endif()
endmacro()