libgtk2-dev ?

Hi, I tried to install Bluefish from the latest cvs version. But configure script gives me an error which says libgtk2-dev is missing. I've gtk, gtk-devel, gtk2 and gtk2-devel installed, but they don't include a library named libgtk2-dev. Is there any other package that i'm missing? The configure script logs include also the line below : checking for gtk+ .... no libgtk2-dev is missing Thanks in advance.