Error building RTL8188GU driver

I tried compiling the RTL8188GU driver, but it failed every time. I don't know how to fix the Makefile error.

source code RTL8188GU
ps:I searched a lot of tutorials, modified many times, and the compilation did not succeed.

error:

Tried Totolink A650UA (AC650) with OpenWrt - #13 by marwan ?

Is not working

https://lkml.kernel.org/r/5a9a264d-a59b-0d91-04f0-e5b38e6aaea0@gmail.com is probably the only way forward (which doesn't imply that it were easy, nor that everything would be supported), Realtek wireless -and especially Realtek/ Reasil USB wireless- is and remains to be a mess. If you can, avoid USB wireless altogether (and Mediatek mt7921/ mt7922 would be the least bad option) or at least don't follow into Realtek's rabbit hole.