I'm trying to compile an app that uses GTK2, and I'm getting this message:
*** Could not run GTK+ test program, checking why...
*** The test program failed to compile or link. See the file config.log for the
*** exact error that occured. This usually means GTK+ is incorrectly installed.
configure: error: *** GTK+ version 2.4.0 or later not found!
config.log reveals that it can't find "gtk/gtk.h". Anyone have any ideas?