Compiling PEPsal for OpenWRT

I apologize if I am in the wrong category,
Around 6 months ago I was trying to compile PEPsal to run on my router but failed.

PEPsal is a package that enables indirect TCP. Just recently I saw bequant use indirect TCP as a L4S proxy and would like to try again.

I was able to compile it for my computer but stuggled with compiling for OpenWRT, or even on the router itself, failing on different steps for each.

Show the errors?
Links to actual product?
Area is OK, hoping one day you add this as official package.