try to  compile changing  Jamrules from

   CCFLAGS = -Wall -std=gnu99 ;
   LINKFLAGS = -L/usr/X11R6/lib ;

to

   CCFLAGS = -Wall -std=gnu99 -I/usr/X11/include -I/usr/X11/include/freetype2 ;
   LINKFLAGS = -L/usr/X11R6/lib -L/sw/lib ;