The actual ebuild only requires >=dev-cpp/gtkmm-2.14.0, but gtk_show_uri is not defined here. Reproducible: Always Steps to Reproduce:
emerge --info and build.log please.
I don't have the build.log anymore and I'm not willing to downgrade to gtkmm 2.14 again just to create a new one. This one is most obvious and so easy to fix! http://git.gnome.org/browse/gparted/commit/?id=32ab5f0ec0319d0f1dc9e880b594c579851af54c convinced?
+ 01 Mar 2010; Gilles Dartiguelongue <eva@gentoo.org> gparted-0.5.1.ebuild: + Raise gtkmm dependency to 2.16, bug #306815. + gtk_show_uri was already defined in gtkmm-2.14, however I don't care enough to fight and find what was the real problem and it's a good excuse to request newer *mm stabilizations. Thanks for reporting, but please provide basic information next time.