Apps :: Compiling: undefined reference to `dlerror'

Hello,
trying to compile moc application (music on console) I received the following error :

...
ltdl.o(.text+0x3a9): In function `sys_dl_open':
/opt/moc-2.4.3/ltdl.c:1107: undefined reference to `dlopen'
...

I installed libraries like libc6-dev.dsl and libc6.dsl.
Probably missing other library ?

Thanks for any clue.

Bye,
Bruno

original here.