描述
编译安装libmad-0.15.1b.tar.gz(20040216发布)的时候出现下面的错误：
unrecognized command line option “-fforce-mem”
原因
gcc 3.4 或者更高版本，已经将“-fforce-mem”去除，所以会出现上面的错误！
解决
找到相关Makefile
vi Makefile
找到包含”-fforce-mem”字符串，将其删除。
参考
Compiling libmad with gcc 3.4 or higher will produce the following error: cc1: error: unrecognized command line option “-fforce-mem”. The build option “-fforce-mem” has been kicked out of gcc, so you need to alter the makefile (just vi Makefile after you have configured, hit “/” to search for the entry and delete it)