This is just a simple font converter.
It converts ttf (and other standard) fonts in a format suitable to be used by an MCU GUI.
It provides glyph bitmaps with antialiasing upto 8 bpp and kerning informations. If you don't know about font kerning i suggest you to google for it. It can realy improve the beauty of the text on your emebedded divice.

This program rely on the FreeType 2 library https://www.freetype.org/. So you have to install it.
On ubuntu:

sudo apt install libfreetype6-dev
git clone https://github.com/singds/fontcvt.git
cd fontcvt
make

After that you have a ../fontcvt/build directory with the executable fontcvt.

To see all the available options run:

./build/fontcvt -h

The program produces the output files on the cwd. So you need to cd on the directory you want the output and from there run fontcvt. This is an example supposing you have copied the arial.ttf font inside the fontcvt directory:

./build/fontcvt arial.ttf  -b4 -s14 -r32-255 -o arial

This will produce the files arial.c arial.h.