Created attachment 198502 [details] patch Generated build.ninja is wrong and causes build failure (at least on powerpc64): https://talos.anongoth.pl/data/powerpc64-default/2018-10-23_15h24m27s/logs/errors/yaml-cpp03-0.3.0.log Switch to USES=cmake:noninja to fix this issue. Hardware sponsored by IntegriCloud.
Created attachment 198505 [details] v2 I found a better fix, replacing $(MAKE) with make in CMakeLists.txt helps.
A commit references this bug: Author: linimon Date: Mon Nov 5 20:05:43 UTC 2018 New revision: 484214 URL: https://svnweb.freebsd.org/changeset/ports/484214 Log: Generated build.ninja is wrong on powerpc64. Replace $(MAKE) with "make" in CMakeLists.txt. PR: 232563 Submitted by: Piotr Kubaj Approved by: portmgr (tier-2 blanket) Changes: head/devel/yaml-cpp03/Makefile head/devel/yaml-cpp03/files/patch-CMakeLists.txt