git

sudo apt-get install git

Go to qt.io and install the latest version of the 64-bit open source version of Qt for Linux. Then run:

sudo apt-get install g++ libxcb-cursor0 libc6-dev libgl1-mesa-dev libgl-dev libglm-dev libjpeg-dev libpng-dev libpng16-16 libxml2-dev libqt6opengl6-dev qt6-base-dev qt6-default qt6-qmake qmake6 ocl-icd-libopencl1 ocl-icd-opencl-dev opencl-headers libopenexr-dev libopenexr-3-1-30

Note that if you have an older system, and libopenexr-3-1-30 is not available on it, you can use libopenexr6.

Install the OpenCL drivers and support libraries for your hardware.

AMD

For AMD get their drivers from their site, build and install a .deb package.

Nvidia

sudo apt-get install nvidia-modprobe nvidia-prime nvidia-384 nvidia-384-dev

If a version more recent than 384 is available at the time, then use that too. You can optionally check nvidia for the latest.

git clone https://mfeemster@bitbucket.org/mfeemster/fractorium.git

Command line build

If you have both Qt 5 and 6 installed, select Qt 6 before compilation

export QT_SELECT=qt6

Build

cd fractorium
qmake main.pro -r -spec linux-g++-64 CONFIG+="release native"
make

Qt Creator build

Open main.pro in Qt Creator and build all.

cd Bin/release
./fractorium

sudo make install

or

sudo make uninstall

You can also compile a .deb package to install locally. A few more tools will
be necessary:

sudo apt-get install bzr bzr-builddeb dh-make debhelper

Run package-linux.sh in the project root. It will create ~/PPA/fractorium-VERSION as a work folder and build a signed source package.

For local use you probably want an unsigned binary package:

./package-linux.sh --binary-only --unsigned