# Clang or AppleClang (see CMP0025)
if(NOT DEFINED C_CLANG AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")
set(C_CLANG 1)
elseif(NOT DEFINED C_GCC AND CMAKE_CXX_COMPILER_ID MATCHES "GNU")
set(C_GCC 1)
elseif(NOT DEFINED C_MSVC AND CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
set(C_MSVC 1)
if(MSVC_VERSION GREATER 1919 AND MSVC_VERSION LESS 1926)
set(VS2019 ON)
elseif(MSVC_VERSION GREATER 1910 AND MSVC_VERSION LESS 1919)
set(VS2017 ON)
elseif(MSVC_VERSION GREATER 1899 AND MSVC_VERSION LESS 1910)
set(VS2015 ON)
endif()