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Import('hostenv') opts = Options(None, ARGUMENTS) opts.AddOptions( BoolOption('socket_wrapper','enable socket wrapper',0) ) opts.Update(hostenv) if hostenv['socket_wrapper']: hostenv.Append(CPPDEFINES = {'HAVE_SOCKET_WRAPPER': 1}) socket_wrapper = hostenv.Library('socket_wrapper',['socket_wrapper.c']) else: socket_wrapper = []