https://www.gnu.org/software/bison/manual/bison.html https://blog.csdn.net/sirouni2003/article/details/400672
http://www.cnblogs.com/itech/archive/2012/03/04/2375746.html
http://academic.udayton.edu/SaverioPerugini/courses/cps444/lecture_notes/yacc.html
http://read.pudn.com/downloads139/doc/fileformat/597500/Lex%E5%92%8CYacc%E4%BB%8E%E5%85%A5%E9%97%A8%E5%88%B0%E7%B2%BE%E9%80%9A.pdf
https://book.douban.com/subject/6109479/ https://github.com/mbbill/flexbison/tree/master/flexbison
https://stackoverflow.com/questions/21298097/library-not-found-for-lfl