FYI, I followed the suggestion at [https://github.com/geany/geany/issues/791%5D(url) and that fixes the problem as far as I'm concerned, because all I lose is the Symbols tab, and that's a bit flakey anyway for PL/SQL code. The advantages of the build with the later GTK library (consistent focus, cursor changing correctly depending on context) far outweigh the loss of symbol functionality.