libcxxabi depends on a matching version of compiler-rt at build time, i.e. libcxxabi-16 needs compiler-rt-16. Trying to update @world on a system may pull in the update for libcxxabi without pulling in compiler-rt, and this results in a build failure. Reproducible: Always
Created attachment 898749 [details] Merge info
I have the same issue, and have had it for a while. The original report did not contain an emerge --info, so adding mine here along with build log.
Created attachment 898750 [details] build log
This one is harder because you don't actually need it unless your clang is using compiler-rt.
(In reply to Sam James from comment #4) > This one is harder because you don't actually need it unless your clang is > using compiler-rt. ... which makes it the same kind of issue as https://bugs.gentoo.org/883225#c14 wrt sys-devel/clang RDEPEND vs PDEPEND. *** This bug has been marked as a duplicate of bug 883225 ***