Re: [PATCH 0/3] Dynptr Verifier Adjustments

[Andrii Nakryiko]

On Thu, Apr 27, 2023 at 4:36 PM Daniel Rosenberg <drosen@xxxxxxxxxx> wrote:
>
> On Wed, Apr 26, 2023 at 4:39 PM Andrii Nakryiko
> <andrii.nakryiko@xxxxxxxxx> wrote:
> >
> > 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.
>
> I've tried the same, modulo some paths. I'm pretty sure it's version
> related at this point.
> The current issue I'm seeing is "error: indirect call in function,
> which are not supported by eBPF" when using GCC-BPF for
> progs/bind4_prog.c

I don't think GCC-BPF is able to compile selftests properly just yet.
So I guess the problem is that you do have some version of gcc-bpf in
the system and selftest's Makefile tries to build gcc variants of
test_progs? That's bad (I don't have GCC-BPF locally, and everyone
else apparently as well).

So for now just `make BPF_GCC=` ? CC'ing Jose, we should probably
agree on some criteria of "GCC-BPF is really capable of building
selftests" and adjust Makefile to only attempt GCC BPF build in that
case.


>
> Currently using clang 16.0.0 and gcc 12.2.0-14.
> I did manage to get it to build by just commenting out TEST_GEN_PROGS
> += test_progs-bpf_gcc