def add_os_flags(self, var, dest=None):
		# do not use 'get' to make certain the variable is not defined
		try: self.env.append_value(dest or var, Utils.to_list(self.environ[var]))
		except __HOLE__: pass
dataset/ETHPy150Open appcelerator-archive/poc-nodejs-desktop/Resources/nodejs/builds/linux/node/lib/node/wafadmin/Configure.py/ConfigurationContext.add_os_flags