OpenWRT-Wt-Makefile

Hello. I'm a beginner.
I wrote a small project, everything works.
Now I am trying to build "Wt" (https://www.webtoolkit.eu/wt) for Openwrt.
Maybe someone already did it?
Share your experience.
I found "Makefile" https://gist.github.com/TheDZhon/f2dd02dfc797dfb00fc117940bc1d784, but it fails to build, it gives an error.