On Wed, Feb 19, 2020 at 01:30:12PM +0100, Jesper Dangaard Brouer wrote: > Hi Andrii, > > Downloaded tarball for kernel release 5.5.4, and I cannot compile > tools/testing/selftests/bpf/ with latest LLVM release version 9. Is this something that recently broke? If so, what commit caused it? And has llvm 9 always worked here? > Looking closer at the build error messages, I can see that this is > caused by using LLVM features that (I assume) will be avail in release > 10. I find it very strange that we can release a kernel that have build > dependencies on a unreleased version of LLVM. Is this the first time you have tried using llvm to build a kernel? This isn't a new thing :) > I love the new LLVM BTF features, but we cannot break users/CI-systems > that wants to run the BPF-selftests. Is this a regression from older kernels? And does gcc work? thanks, greg k-h
