Recently libpng has upgraded from 14 to 15. However gnome-base/gnome-settings-daemon-2.32.1-r2 fails to compile. Reproducible: Always build.log is attached. It says it tries to link with libpng14 although my machine has only libpng15.
Created attachment 290555 [details] bug log
It says a bit more actually. It says "grep your la files for png14"...probably starting with libgnomekbd.la.
*** This bug has been marked as a duplicate of bug 319101 ***