Digital BW, The Print

Everything goes well until I get to "sh make-quadtonerip".  I press
enter and get some error messages.  I'm not sure where to look to fix
it.  The install instructions say it's usually due to a missing
cups-config but right at the start I did "locate cups-conf" and
/usr/bin/cups-config turned up on the list.  The error messages I get are:

[root@localhost share]# cd QuadToneRIP2-beta/
[root@localhost QuadToneRIP2-beta]# ls
CurveDesign          make-quadtonerip  QTR-LinuxNotes.pdf 
SourceReadMe.rtf
CurveSrc             PPDs              quad.convs
Gimp-Print-Info.pdf  Profiles          RasterSrc
install-quadtonerip  qpr               ReadMe.html
[root@localhost QuadToneRIP2-beta]# sh make-quadtonerip
cc -g -O   -c -o qline.o qline.c
make: cc: Command not found
make: *** [qline.o] Error 127
cc -g -O -I. -DQUADPATH=\"`cups-config --datadir`\"   -c -o
quadraster.o quadras
ter.c
/bin/sh: line 1: cc: command not found
make: *** [quadraster.o] Error 127
[root@localhost QuadToneRIP2-beta]#


Any help sure would be appreciated.  I'm gettin' close.

Thanks,

Tom