Re: [PATCH 0/3] Dynptr Verifier Adjustments

[Andrii Nakryiko]

On Wed, Apr 26, 2023 at 3:07 PM Daniel Rosenberg <drosen@xxxxxxxxxx> wrote:
>
> >
> > It is expected that you build the freshest vmlinux image before
> > building selftests, because we generate vmlinux.h from it. In your
> > case we generated vmlinux.h from your system-wide
> > /sys/kernel/btf/vmlinux BTF information, which doesn't yet have latest
> > UAPI enums.
> >
> I'm still unable to build the selftests. I've got it pointed to a
> locally built kernel built using the config/config.x86_64, and have
> tried running the vmtest.sh script, and building just the tests via
> make. I'm using O= to direct it to the out directory for the kernel
> build. I've been hitting various errors when trying this. Confusingly
> the error message isn't always the same. Currently from a clean build,
> it complains about "linux/atomic.h" not found via #include
> "../../../include/linux/filter.h"'s in various files. Other times it's
> complained about the various helper functions from bpf_helper_defs.h
> being unused.
>
> I'm not sure if I'm invoking the command wrong, or missing
> dependencies or something. I got past some earlier issues by updating
> clang. Any idea what I'm doing wrong?

Don't know, show the sequence of commands you are running?

I have linux source in ~/linux, and KBUILD_OUTPUT set to
~/linux-build/default. And it only takes this:

$ cd ~/linux
$ make -j90 # build kernel
$ cd tools/testing/selftests/bpf
$ make -j90 # build selftests

And that's it.