'Gets the explicitly overriden map file name for a target or returns None
if it\'s not set.'

def GetMapFileName(self, config, expand_special):

    config = self._TargetConfig(config)
    map_file = self._Setting(('VCLinkerTool', 'MapFileName'), config)
    if map_file:
        map_file = expand_special(self.ConvertVSMacros(map_file, config=config))
    return map_file
