include(Compiler/Clang)
__compiler_clang(CXX)

if(NOT CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
  set(CMAKE_CXX_COMPILE_OPTIONS_VISIBILITY_INLINES_HIDDEN "-fvisibility-inlines-hidden")
endif()

cmake_policy(GET CMP0025 appleClangPolicy)
if(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()