A simple UI library for SFML (2.2 at least). Works on GNU/Linux, Windows, Android. Currently not tested on Mac OS X and iOS.
Website (including documentation) : patatedev.github.io/sfml-ui
Make sure you have already compiled SFML and CMake is installed
If you use a graphical version of CMake :
Else, enter these command in your terminal (Unix family OS) :
mkdir build && cd build
cmake .. -G "Unix Makefiles"
replace "Unix Makefiles" by your makefile generatormake
Don't forget to have set SFML_ROOT setting if SFML is installed in a custom directory :
export SFML_ROOT=<path/to/SFML>
And to install : sudo make install
Same as desktop os, except you have to specify this custom toolchain : cmake/toolchains/android.toolchain.cmake. Once it is done, you can customize ANDROID_ABI setting for the target arch, and ANDROID_API for the Android target platform.