help!mplayer安装问题

装完FC4后，安装XMMS等程序正常，但安装MPLAYER时死活装不上，提示：
'make' will now compile MPlayer and 'make install' will install it.
Note: On non-Linux systems you might need to use 'gmake' instead of 'make'.

Please check mtrr settings at /proc/mtrr (see DOCS/HTML/en/devices.html#mtrr)

Failed to find a Win32 codecs directory! (default: /usr/local/lib/codecs/)
Create it and copy the DLL files there! You can download the codecs from our
homepage at http://www.mplayerhq.hu/MPlayer/releases/codecs/


Check configure.log if you wonder why an autodetection failed (check whether
the development headers/packages are installed).

If you suspect a bug, please read DOCS/HTML/en/bugreports.html.


我的/usr/local/lib/codecs/目录也存在，请问各位大哥这是什么原因？

已处理，方法是在后面加上--with-win32libdir=/usr/local/lib/codecs。
我没想明白，MPLAYER的默认目录就是/usr/local/lib/codecs，为什么要加这个参数呢？

问题就出在这个codecs身上啊!!