x11-misc/matchbox-keyboard-0.1 fails to compile for me because of missing cairo-xlib.h header. I have x11-libs/cairo-1.6.4 installed without X flag. The will be attached below in a minute.
Created attachment 155753 [details] matchbox-keyboard-0.1.log
Created attachment 155755 [details] emerge-info
Created attachment 155763 [details] emerge-info Sorry for the mess.
Thanks for noticing, fixed in CVS.