Porting to Compaq cxx Linux Alpha...
I had to make the following change
to get mm2rbn.cpp to compile:

// changed type in mm2rbn.h to fix problem...Bob Williams // 11/29/01
GLfloat* head_refs[2];
// fGL_a3 head_refs[2];
fGL_a3 * head_points;
GLfloat* tail_refs[2];
// fGL_a3 tail_refs[2];
fGL_a3 * tail_points;