How to verify activate OpenGL ?

Anonymous_Banned275

Again - after clean install OpenGL is inaccessible. There are few posts telling how to activate / install. Some say it is a part of Ubuntu, hence not necessary to install.

How do I verify if it is already installed , and QT just does no see it?
What is the most reasonable;e way to "just re install OpenGL " so QT can see it?
Cheers

SGaist

Hi,

Again, as explained in countless other threads, install the OpenGL dev package.

sudo apt install libgl1-mesa-dev

Anonymous_Banned275

I used this
sudo apt-get install libglu1-mesa-dev freeglut3-dev mesa-common-dev

I was asking which way is "reasonable".

I guess if QT complains it is a way to "verify" too.

SGaist

Fastest way:

find /usr/lib/ -name "libGL.so" -print

If no file found, it means that the you do not have the OpenGL development package installed.