Can't compile mplayer or xine

I haven't been able to compile MPlayer-1.0pre7 in Suse 10.0, it says something about gcc version. I tried xine-lib-1.0.3a, too with no succes at all. Do I have to try a different gcc version, a few more programs I can't recall right now won't compile either, (I think I also tried vidix-0.9.9.1 and mplayerxp-0.5.1).

I would appreciate any idea, I'm just another newbie. Thanx in advance.