implicit declaration

[Gildardo Sanchez-Ante <gildardo@xxxxxxxxxxxx>]

When i try to compile OI on Mandrake 7.2 with gcc version 2.95.3 i get
SoText3.c++: In method `void SoOutlineFontCache::generateFrontChar(const
char *, GLUtesselator *)':
SoText3.c++:1949: implicit declaration of function `int
gluBeginPolygon(...)'
SoText3.c++:1958: implicit declaration of function `int
gluNextContour(...)'
SoText3.c++:1972: implicit declaration of function `int
gluEndPolygon(...)'
gmake[5]: *** [SoText3.o] Error 1

what am i doing wrong?

Thanks!

Gildardo Sanchez-Ante