Created attachment 197944 [details]
USES=compiler:c++11-lang is needed to build this port on architectures where GCC is in base.
While here, add USES=gnome.
Tested on powerpc64 and amd64.
Hardware sponsored by IntegriCloud.
A commit references this bug:
Date: Sun Oct 28 10:55:44 UTC 2018
New revision: 483269
Fix build with GCC-based architectures.
Submitted by: Piotr Kubaj