Various fixes to make gtkdoc-check pass on glib

Merged Xavier Claessens requested to merge xclaesse/glib:gtkdoc-check-fix into master

With this patchset, and a fix in gtk-doc (gtk-doc!32 (merged)) I got gtkdoc-check pass for glib (not gobject/gio yet).

Our CI really should run gtkdoc-check, because this regress all the time. I added support for that in Meson:

Edited by Xavier Claessens

Merge request reports