You have probably forgot to install some packages that are necessary for a
successful compilation. One of these packages on Toutatis was libc6-dev.
You can also download the source code using wget if you want:
wget https://github.com/qca/open-ath9k-htc-firmware/archive/master.zip
Also, I wanted to compile the latest firmware code for you, but on my
ThinkPad R60 computer I got a no free space left on device error message when
I try to compile it inside VirtualBox, or by directly booting into the Live
CD environment (I'm low on RAM!). I also tried to do it on my primary laptop
PC (a Sony VAIO VPCZ1), but unfortunatelly, I have (currently) some
overheating problems and Trisquel automatically shuts down the laptop if I do
some CPU intensive task.
I have no experience outside Trisquel GNU/Linux yet because this distro was
practically the "only" choice for me when I moved away from MS Windows in
favor for software freedom. You should rather ask your question on the
Parabola forums, or try to solve it using DuckDuckGo/Google Search so as I
do.