Using OpenGL within QT, novice Linux user

BKBK

Centos Linux
I am using QT Designer from Trolltech version 3.3.8b, the goal is to create a window/panel with an OpenGL display within the QT display. The QT part seems to be fine, it’s the GL part that is a problem.

A tutorial specified to add the two options for lib:
Quote:
-lglut –lglu
G++ says that it cannot find –lglu. It does appear to find –lglut
In path /usr/include/GL there are about 17 files to include glu.h, gl.h, glut.h, and more.

From directory /usr/lib64 issue the command:
ls –al libGLU.so
to get
lrwxrwxrwx 1 root root 15 Oct 25 10:23 libGLU.so -> libGLU.so.1.3.1
I interpret that as indicating that it exists.
When the -lglu is removed the error is gone but then I must comment out almost everything GL related

I tried looking at environment variables $LIB, $LIBRARY, $LD_LIBRARY_PATH, $LIBPATH, and $SHLIB_PATH but none exist.
Any suggestions as to where I might look or what I might do to resolve this problem.

SGaist

Hi,

Do you really have to use Qt 3.3.8b ?

BKBK

Unfortunately yes. I am on a government project and the project manager(s) take the position that since it works and does what is needed we are not going to spend money and time to upgrade.

SGaist

Ok...

You need to install the libglu development package if not already on your system.

BKBK

In my OP I noted that something like that was found. Here is the result of: ls al libGLU.so:
lrwxrwxrwx 1 root root 15 Oct 25 10:23 libGLU.so -> libGLU.so.1.3.1

Is there something else I should look for?

SGaist

My bad, I misread.

Did you try with -lGLU ?

BKBK

I have tried
-lglu –lglut // returned cannot fine -lglu
LGLU –LGLUT // returned undefined reference to 'glClear'
-Lglu -lGLUT // returned cannot find lGLUT

SGaist

Keep l lowercase, it's not the same signification for the linker. -L adds a folder to the search path of the linker while -l is to add a library to link to.

BKBK

Did a few more, and maybe some duplicates from earlier.
-lglut undefined reference to glClear
-lglut -lglu cannot find -lglu
-lglut -lGLU undefined reference to glClear

the -lglu and -lGLU appear to provide nothing.

SGaist

glClear is provided by the OpenGL library. You are missing -lGL.

BKBK

Ok, that worked and I am on my way again.
Thank you for your time and patience.