Argh sorry, it was just me being stupid.

I found in the SDK, there is a section with the list of build steps (qmake, make and make clean) which are basically automatically what you would type in terminal, along with a list of environment variables where I added to the LD_LIBRARY_PATH:
But I just deleted " sample" from the end and now it all works!

Thanks for all your help! This has been bugging me for a couple of days now, always ends up being something simple :P