cmake/SetOSVariable.cmake

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cmake_minimum_required(VERSION 3.1)

if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
  set(OS "Mac OS X")
elseif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
  set(OS "Linux")
elseif(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
  set(OS "Windows")
else()
  set(OS "Unknown")
endif()