Undef. references 'XF86VidModeQueryVersion'

Hi…

Ive installed SDL-1.1.4 ‘successfully’.
[running linux 2.4, glibc 2.1.3, gcc 2.95.2]

Whenever i try to compile any programm with -lSDL i get:
/usr/local/lib/libSDL.so: undefined reference to
XF86VidModeQueryVersion' /usr/local/lib/libSDL.so: undefined reference toXF86VidModeSetViewPort’
/usr/local/lib/libSDL.so: undefined reference to
XF86VidModeQueryExtension' /usr/local/lib/libSDL.so: undefined reference toXF86DGAQueryDirectVideo’

any idea ? What kind of lib is also required to get libSDL working ?

tobi