Codeblocks can't find juce header

[t0m]

That would indicate an X11 linking problem. Two things to check:

Do you have all the dependencies installed?

List of Juce dependencies under linux

I had to reinstall a fresh Ubuntu, and therefore grab all the dependancies for Juce…again. So I thought I’d make a little list and share it with you guys, in case it can save someone else’s time … sudo apt-get -y install g++ sudo apt-get -y install libfreetype6-dev sudo apt-get -y install libx11-dev sudo apt-get -y install libxinerama-dev sudo apt-get -y install libxrandr-dev sudo apt-get -y install libxcursor-dev sudo apt-get -y install mesa-common-dev sudo apt-get -y install libasound2-dev su…

If you look at the linking stage do you see -lX11 in the list of arguments?