LV2 plugins - compile example

I’m trying the LV2 compile here:
https://elk-audio.github.io/elk-docs/html/embedded/building_plugins_for_elk.html
under “generate LV2” it says to run autorun to generate the ttl files. I don’t think this is up to date, as that will create the errors:

aclocal: error: 'configure.ac' is required
autoheader: error: 'configure.ac' is required
autoconf: error: no input file
automake: error: 'configure.ac' is required
./autogen.sh: 23: ./configure: not found

popular robotic advice interfaces suggest some other steps but I haven’t yet tested those. Curious about your thoughts!