Created attachment 197271 [details]
Base GCC defaults to C89, while this port uses C99. That makes building with base GCC to fail.
Define USE_CSTD=c99 to fix this.
Tested on powerpc64 and amd64.
A commit references this bug:
Date: Sun Sep 23 05:10:39 UTC 2018
New revision: 480454
Fix build on gcc-based archs.
Also tested on amd64.
Submitted by: Piotr Kubaj
Approved by: portmgr (tier-2 blanket)