https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: media-gfx/yafaray-3.5.1 does not respect CFLAGS. Discovered on: amd64 (internal ref: tinderbox) NOTE: To reproduce this issue you may want to add "-frecord-gcc-switches" to CFLAGS/CXXFLAGS/FFLAGS/FCFLAGS. If this is not something about c/c++ context see this bug as an hint to hide the QA warning (with QA_FLAGS_IGNORED) where is not possible to respect CFLAGS.
Created attachment 691146 [details] build.log build log and emerge --info
This was fixed by https://gitweb.gentoo.org/repo/gentoo.git/commit/media-gfx/yafaray?id=035cffeb173bd85dba3276158e18f03a9609ed19 And indeed looks like your tinderbox's git HEAD is lagging 16 hours behind.