cannot find -lQtOpenGL and -lGL

[Zola]

@SGaist Qt 4.8.6 :)

[SGaist]

Did you re-run qmake after adding QT += opengl ?

If so, how did you install Qt ?

[Zola]

@SGaist I installed it from source using QtCreator 3.5.1 and Qt 4.8.6 on my Ubuntu 14.04.3 LTS Virtual Machine. I re-run it and it's the same. How to include opengl module when doing ./configure step? Is it required or it is included by default?

[SGaist]

Since you built it yourself and didn't had the OpenGL dev lib, it was built without. You have to build Qt again (from scratch with a new call to configure). While you're at it, you should consider using 4.8.7.

[Zola]

@SGaist how to include opengl lib when doing ./configure. I tried ./configure -opengl es2 but I am getting errors.

[SGaist]

If you installed everything it should be detected automatically. The errors is because you don't have OpenGL es2 installed. But since you're on a desktop just use the desktop OpenGL.

[Zola]

@SGaist If I am building whole project on Ubuntu desktop machine, should I use -opengl desktop or es2, because I'm building that up for BeagleBone Black?

[SGaist]

So you're cross-compiling ?

[Zola]

@SGaist yes, sorry for not telling you that earlier. I need opengl for embedded (BeagleBone Black armhf) but i need to install opengl and write correct paths for embedded opengl in my qmake.conf file.

[SGaist]

What distribution are you using for that board ? It should provide everything you need (headers + lib) IIRC there's already a mkspec for the BeagleBoard

[Zola]

@SGaist Debian Wheezy

[SGaist]

You should take a look at this thread. The poster has provided links to an interesting Wiki to build everything you need before building Qt.