cmake get compiler options

get_cc_options.cmake

macro(get_gcc_compile_flags target flags)
  string(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" name)
  set(flags "${${name}} ${CMAKE_CXX_COMPILER_ARG1}")
  get_target_property(value ${target} COMPILE_FLAGS)
  if (value)
    list(APPEND flags ${value})
  endif()
  get_target_property(value ${target} TYPE)
  get_target_property(value ${target} COMPILE_DEFINITIONS)
  if (value)
    foreach(item ${value})
      list(APPEND flags "-D${item}")
    endforeach()
  endif()
  STRING(TOUPPER "COMPILE_DEFINITIONS_${CMAKE_BUILD_TYPE}" name)
  get_target_property(value ${target} ${name})

  if (value)
    foreach(item ${value})
      list(APPEND flags "-D${item}")
    endforeach()
  endif()
  get_directory_property(value DEFINITIONS)
  if (value)
    set( value_list ${value} )
    separate_arguments(value_list)
    foreach (item ${value_list})
      list(APPEND flags ${item})
    endforeach()
  endif()
  get_directory_property(value INCLUDE_DIRECTORIES)
  if (value)
    foreach(item ${value})
      list(APPEND flags "-I${item}")
    endforeach()
  endif()
  #separate_arguments(flags)
endmacro()