Hi,

I am compiling some openGL code on my Red Hat Linux system (2.4.21-20.ELsmp).

The command line is as follows:

g++ -o camklt camklt.o -L/usr/lib -lglut -L/usr/X11R6/lib -lGL -lGLU -lGL -lXext -lXmu -lXi -L../lib -lcamcon -L../klt/klt -lklt

and I get the following error messages:

camklt.o(.text+0x2d4): In function `redraw()':
/home/koch/sean_urop/urop_release/camklt/camklt.cpp:53: undefined reference to `glutSwapBuffers()'
camklt.o(.text+0x39b): In function `main':
/home/koch/sean_urop/urop_release/camklt/camklt.cpp:63: undefined reference to `glutInit(int*, char**)'
camklt.o(.text+0x3a8):/home/koch/sean_urop/urop_release/camklt/camklt.cpp:64: undefined reference to `glutInitDisplayMode(unsigned int)'
camklt.o(.text+0x3b7):/home/koch/sean_urop/urop_release/camklt/camklt.cpp:66: undefined reference to `glutInitWindowPosition(int, int)'

I do have the libraries at the right place with the right permissions :
> ls -l /usr/lib | grep glut
lrwxrwxrwx 1 root root 12 Oct 8 12:16 libglut.so -> libglut.so.3
lrwxrwxrwx 1 root root 14 Oct 8 12:16 libglut.so.3 -> libglut.so.3.7
-rwxr-xr-x 1 root root 213572 Oct 8 12:16 libglut.so.3.7

My LD_LIBRARY_PATH variable is:
/usr/lib:/usr/lib/internal:/lib:/lib/cmplrs/cc:/usr/lib/cmplrs/cc:/opt/lib:/usr/local/lib:/u5/city/tools/mpi/mpich-1.2.1/lib

So what's wrong in there?

Thanks in advance,

Olivier

what do you get from
objdump -t /usr/lib/libglut.so | grep glut

> objdump -t /usr/lib/libglut.so | grep glut...
/usr/lib/libglut.so: file format elf32-i386

A buddy of mine gave me this fix which works:

- include glut.h from /usr/local/include/MesaGL instead of where you were getting it before (/usr/local/fltk/fltk-1.0.7)
- change #include <GL/glut.h> to just #include <glut.h> in the source
- use -L/usr/local/lib

The conclusion is that glut.h's differ in some way.

Thank you for your help.

Olivier