Intel Core Duo 1.83GHz compiler optimization / makefile help

Question

Hi,
I have a C listing which was originally written with unix or Windows in mind, I wonder if anyone could help me to compile it on my Intel iMac 17inch. It's a small benchmarking program so compiler optimization is important - is this possible on an Intel Core Duo (I don't expect to include threading) using XCode or gcc?
I'm not a programmer, the original programmer does not know anything about Macs or OS X, however I would like to use this program to effectively benchmark my machine. Currently the program will not compile using the makefile I have, I can run code compiled on a G4 but it runs slow and gives a false result.
Here's my makefile:
obj = c-ray-f.o
bin = c-ray-f
CC = gcc
CFLAGS = -O3 -ffast-math
$(bin): $(obj)
$(CC) -o $@ $(obj) -lm
.PHONY: clean
clean:
rm -f $(obj) $(bin)
I do not really understand what any of that lot does, nor can I get my head around compiler options (I tried looking, but found nothing that made any sense to me!)
Any help would really really be appreciated!

Answer 1

Change all the -
#include <GL/glut.h>
to
#include <GLUT/glut.h>
and
if ( (!((*x)>=min)) || _isnan(*x) ) { // Other compilers may use "isnan" instead of "_isnan"
to
if ( (!((*x)>=min)) || isnan(*x) ) { // Other compilers may use "isnan" instead of "_isnan"
Then run this script in directory RayTraceKd to build RayTraceKd -
[dranta:~/RayTrace/RayTrace_3.2/RayTraceKd] dir% cat build
cd ../VrMath
g++ -O2 -fpermissive -c *.cpp
cd ../DataStructs
g++ -O2 -fpermissive -c *.cpp
cd ../Graphics
g++ -O2 -fpermissive -c *.cpp
cd ../OpenglRender
g++ -O2 -fpermissive -c *.cpp
cd ../RaytraceMgr
g++ -O2 -fpermissive -c *.cpp
cd ../RayTraceKd
g++ -O2 -fpermissive -c *.cpp
g++ -o RayTraceKd -bindatload -framework GLUT -fpermissive *.o ../VrMath/*.o ../DataStructs/*.o ../Graphics/*.o ../OpenglRender/*.o ../RaytraceMgr/*.o -L/usr/X11R6/lib -lgl -lglu