Created attachment 201778 [details]
-Wno-unused-result is not supported by base GCC. Remove it to fix build on GCC architectures.
Tested to still compile with base Clang.
Hardware sponsored by IntegriCloud.
A commit references this bug:
Date: Fri Mar 29 16:03:40 UTC 2019
New revision: 497160
Fix build on GCC-based architectures:
unrecognized command line option "-Wno-unused-result"
Submitted by: Piotr Kubaj
Approved by: portmgr (tier-2 blanket)