[fpc-pascal]question - linking under Linux

[Martin Hankovec]

Hello,
I have a problem. If I tried to compile some program under Linux, I got this message:
(dots represent some not important text :-)))

Free Pascal .....
Compiling ......
Assembling ...
Linking...
/usr/bin/ld: cannot open -lm: not file or directory
Warning: Error while linking
Closing script ppas.sh
95 lines compiled, ...

What's the reason of this error ? Is it any bad set of path ?

Thanks a lot

Martin H.