No matter introspection flag, gir files are neither built nor installed.
Steps to Reproduce:
1. USE=introspection emerge =gnome-extra/libgda-5.1.1
No Gda-5.0.gir nor Gdaui-5.0.gir files are built
It seems as libgda configure is ignoring enable-introspection flag. If --enable-gda-gi and --enable-gdaui-gi are used, then it tries to build gir files. And failes. Problem seems to be related to >dev-libs/gobject-introspection-1.32 g-ir-compiler, but I didn't verify it. To be able to generate gir files, a small patch is needed (or a propper fix in g-ir-compiler, which seems not able to make difference between void and void* types).
Created attachment 333962 [details, diff]
if introspection USE flag configure with --enable-gda-gi --enable-gdaui-gi
Created attachment 333964 [details, diff]
remove typecasting from constant, so g-ir-compiler is happy
With 5.2.2 I see the gir file being installed