local cmake_str = ""
 
check_compiler_features({
 {
  file = "special_feature.cpp",
  feature = "COMPILER_SUPPORTS_CXX11",
  callback
 }
})
 
if (get_os() == "linux") then 
  check_compiles({
    {
      file = "file.cpp",
      cmake_file = "./test/CMakeList.txt",
      callback = change_cmake_list
    }
  })
 
  check_compiler_flag({
    flag = ""
    callback = func
  })
  get_cpu_info()
 
  check_defined(
    {
    symbol = "string",
    file = "file.hpp", 
    callback = func
    }
  )
end
 
return cmake_str