Needs to update docs describing how to use the meson build system with Geany, otherwise nobody will use it because its not documented.
README HACKING INSTALL geany.txt
all cover various parts of autofools and need meson instructions too. Suggest you cover it in detail (commands, options, prefixes, and other stuff those docs cover) in one place, then refer to that from the others. That will avoid issues of inconsistent and missing information in different places.