libgdata is a GLib-based library for accessing online service APIs 
using the GData protocol  most notably, Google's services. It provides 
APIs to access the common Google services, and has full asynchronous 
support.

Below variables can be used to configure the build:
  GTKDOC=true         : Builds gtkdocs
  INSTROSPECTION=true : Enables the introspection generation
  TESTS=true          : Build & install test programs
  VAPI=true           : Enable creation of vapi files
  OAUTH=enabled       : Enable OAuth 1.0 support (deprecated)
  MAN=true            : Generate man pages