When full Gnome is not installed, gnome-extra/gucharmap-3.10.1 needs dev-util/desktop-file-utils at build time, but it's not mentioned in the ebuild. Reproducible: Always
Created attachment 375570 [details, diff] ebuild patch
Can you provide the build.log?
Created attachment 375580 [details] build.log Here is the build.log. The relevant configure messages are: checking for desktop-file-validate... no configure: error: desktop-file-validate not found
+ 27 Apr 2014; Pacho Ramos <pacho@gentoo.org> gucharmap-3.10.1.ebuild: + desktop-file-validate is needed at build time (#508558 by Phil Krylov) +