Hi, If you are a Linux user, Anjuta is your friend. Even if it doesn't do the entire job, it is a good start with autotools and vala. I use it to develop my projects, it creates basics configure.ac and Makefile.am files, which can be modified after that. There are lot of examples in the gnome git repository. Attached to this mail the minimal configuration for a shared library in vala and autotools (or something close to). There is no config.vapi file in the sources directory, it can be necessary to create one.
Attachment:
libcore.zip
Description: Zip archive