Created attachment 766755 [details] Emerge log. sys-libs/compiler-rt-13.0.1 fails to compile because it can't find gnu/stubs-32.h
Created attachment 766756 [details] Emerge info
sys-libs/compiler-rt-14.0.3::gentoo Same error in one of my boxes, but in some other no-multilib installs the build completed without errors.
USE=-abi_x86_32 emerge -1av compiler-rt This works, now have to investigate why this is required in this box and not in others.
I won't be able to contribute further to this report, because I no longer have the no-multilib system available. Please feel free to close it if it is no longer valid/important.