I've been trying to use Anjuta to start using Vala. It was working well until I tried to use an ArrayList. The Gee library doesn't seem to work in Anjuta; it seems to be working when I compiled it manually. Am I missing something?
Maybe you need to add
in src/Makefile.am under VALAFLAGS, then reconfigure and build.
So far, I experienced that I have to add any libraries I use there. Otherwise, it won't find the references.