出现以下提示：
root@ubuntu:/usr/games# lsdldoom -IWAD /opt/doom/doom.wad
Oct 7 2004 Doom LEGACY v1.41 23:35:21
The Ultimate DOOM Startup
Z_Init: Init zone memory allocation daemon.
system memory 242Mb free 3Mb
20 megabytes requested for Z_Init.
W_Init: Init WADfiles.
Added file /opt/doom/doom.wad (2306 lumps)
Added file /usr/share/games/doom/legacy.dat (80 lumps)
===========================================================================
This program is Free Software!
See the terms of the GNU General Public License
===========================================================================
I_StartupTimer...
I_StartupGraphics...
HU_Init: Setting up heads up display.
lsdldoom: symbol lookup error: lsdldoom: undefined symbol: open_music
请问如何解决？谢谢！
英雄们，帮个忙吧，真的很喜欢这个游戏啊！