Created attachment 203791 [details] patch Add -latomic to LDFLAGS to fix linking when using GCC. Tested on powerpc64 and amd64.
Committed, thanks!
A commit references this bug: Author: yuri Date: Fri Apr 19 16:13:23 UTC 2019 New revision: 499374 URL: https://svnweb.freebsd.org/changeset/ports/499374 Log: devel/hpx: fix build with GCC-based architectures PR: 237381 Submitted by: Piotr Kubaj <pkubaj@FreeBSD.org> Changes: head/devel/hpx/Makefile