On Thu, Apr 27, 2023 at 4:36 PM Daniel Rosenberg drosen@google.com wrote:
On Wed, Apr 26, 2023 at 4:39 PM Andrii Nakryiko andrii.nakryiko@gmail.com 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