@ MG!IFOS! this is what i did to get the camera driver working in Ubuntu 20.04 on my laptop and Ubuntu Mate x64 on the rpi.

From memory:

create directories to hold project and builds:
mkdir ~/libsv305-build
mkdir ~/indi-sv305-build
mkdir ~/sv305project

download project from github:
cd ~/sv305project
git clone --depth=1 github.com/thx8411/indi-3rdparty.git
git checkout thx8411_sv305_2

build library:
change to the ~/libsv305-build directory
cmake ~/sv305project/indi-3rdparty/libsv305
make
sudo make install

build driver:
change to the ~/indi-sv305-build directory
cmake ~/sv305project/indi-3rdparty/indi-sv305
make
sudo make install

to start the indiserver
sudo indiserver indi-sv305-ccd

i had to start the indiserver as sudo, though im unsure why at this point. perhaps because the library and driver were installed as sudo.
this library is still experimental (though its working quite well).

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