Warnings from autogen.sh

[Junichi Saito <j saito wanadoo fr>]

I grabbed this morning principal modules from CVS and recompiled GNOME
from the beginning. When configuring gnome-libs, I got for the first
time the following message:

**Warning**: You must have Gtk installed to compile Gnome.  I cannot
find it installed in the usual places. (...)

Is this because of some problem on my part ? gtk+ is installed in
/usr/local. I usually disable the build of static libs of most packages.

Perhaps can I ignore it, as the configuration terminated without problems. 

junichi