Mark Brown <broonie@xxxxxxxxxx> writes: > On Mon, Oct 07, 2024 at 06:00:57PM +0200, Björn Töpel wrote: >> Mark Brown <broonie@xxxxxxxxxx> writes: >> > On Mon, Oct 07, 2024 at 09:31:32AM +0200, Björn Töpel wrote: > >> > CLNG-BPF create_dsq.bpf.o >> > In file included from create_dsq.bpf.c:9: >> > /home/broonie/git/linux/tools/sched_ext/include/scx/common.bpf.h:33:17: error: use of undeclared identifier 'SCX_DSQ_FLAG_BUILTIN' >> > 33 | _Static_assert(SCX_DSQ_FLAG_BUILTIN, >> > | ^ > >> This is most likely due to incorrect VMLINUX_BTF_PATHS, so that >> vmlinux.h is incorrectly generated. Try grepping for >> SCX_DSQ_FLAG_BUILTIN in vmlinux.h. > > Yeah, it's not in the generated files: > > broonie@finisterre:~/git/linux$ grep SCX_DSQ_FLAG_BUILTIN ./tools/testing/selftests/sched_ext/build/include/vmlinux.h ./tools/testing/selftests/sched_ext/build/obj/bpftool/vmlinux.h > broonie@finisterre:~/git/linux$ > > I didn't actually build a kernel, if the build system needs a kernel > it's just silently not detected that it's missing? It tries to find a kernel with BTF: | VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ | $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ | ../../../../vmlinux \ | /sys/kernel/btf/vmlinux \ | /boot/vmlinux-$(shell uname -r) Similar to all the other selftests using BPF. (Oh, and at some point the BPF parts should be in lib.mk...) Björn
