According to my understanding, one doesn't become buddha merely by doing meditation. Buddha did meditation, yoga n' all other sorts of craps before getting enlightenment. But he renounce all of them and he got his buddhahood after eating sujata's kheer. He formally said that all these may not be necessary to reach buddhahood. But meditation or yoga does help to get more concentration power and bring oneself into discipline. It might be the beginning. But saying buddha to someone just because he has mastered meditation won't be logical. It's like praying as god to abnormal childs or animals born in Nepal.