Messages in this thread | | | Date | Wed, 19 Feb 2020 14:28:56 +0100 | From | Greg Kroah-Hartman <> | Subject | Re: Kernel 5.5.4 build fail for BPF-selftests with latest LLVM |
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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
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