Neat, plugins seems to be working, configures, builds and they show up in PM and at least @eht16's add-ons works (so many todos, sigh) :-)
But icons still not right, at least some icons got installed but the same set of icons got installed in both $PREFIX/share/icons/hicolor/apps and actions whereas autotools puts them in a tree like:
``` $PREFIX/share/icons/hicolor/ 16x16/ apps/ actions/ 24x24/ actions/ 32x32/ apps/ actions/ 48x48/ apps/ actions/ scalable/ apps actions ```
where each apps has the classviewer icons and each actions has the Geany bookcase and save all and close all fallback icons, dunno what happened to 24x24 apps??. There is also an` icon-theme.cache` in hicolor that is not present in the meson one. Are you using the meson gnome module, the end of [this](https://mesonbuild.com/Gnome-module.html#page-description) page talks about creating it?