On Wed, Feb 10, 2021 at 11:02:15AM -0700, Nathan Chancellor wrote: > On Wed, Feb 10, 2021 at 09:52:42AM -0800, Andrii Nakryiko wrote: > > On Wed, Feb 10, 2021 at 9:47 AM Nathan Chancellor <nathan@xxxxxxxxxx> wrote: > > > > > > On Fri, Feb 05, 2021 at 01:40:20PM +0100, Jiri Olsa wrote: > > > > The resolve_btfids tool is used during the kernel build, > > > > so we should clean it on kernel's make clean. > > > > > > > > Invoking the the resolve_btfids clean as part of root > > > > 'make clean'. > > > > > > > > Acked-by: Song Liu <songliubraving@xxxxxx> > > > > Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx> > > > > --- > > > > Makefile | 7 ++++++- > > > > 1 file changed, 6 insertions(+), 1 deletion(-) > > > > > > > > diff --git a/Makefile b/Makefile > > > > index b0e4767735dc..159d9592b587 100644 > > > > --- a/Makefile > > > > +++ b/Makefile > > > > @@ -1086,6 +1086,11 @@ ifdef CONFIG_STACK_VALIDATION > > > > endif > > > > endif > > > > > > > > +PHONY += resolve_btfids_clean > > > > + > > > > +resolve_btfids_clean: > > > > + $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(abspath $(objtree))/tools/bpf/resolve_btfids clean > > > > + > > > > ifdef CONFIG_BPF > > > > ifdef CONFIG_DEBUG_INFO_BTF > > > > ifeq ($(has_libelf),1) > > > > @@ -1495,7 +1500,7 @@ vmlinuxclean: > > > > $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean > > > > $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) > > > > > > > > -clean: archclean vmlinuxclean > > > > +clean: archclean vmlinuxclean resolve_btfids_clean > > > > > > > > # mrproper - Delete all generated files, including .config > > > > # > > > > -- > > > > 2.26.2 > > > > > > > > > > This breaks running distclean on a clean tree (my script just > > > unconditionally runs distclean regardless of the tree state): > > > > > > $ make -s O=build distclean > > > ../../scripts/Makefile.include:4: *** O=/home/nathan/cbl/src/linux-next/build/tools/bpf/resolve_btfids does not exist. Stop. > > > > > > > Can't reproduce it. It works in all kinds of variants (relative and > > absolute O=, clean and not clean trees, etc). Jiri, please check as > > well. > > > > Odd, this reproduces for me on a completely clean checkout of bpf-next: > > $ git clone --depth=1 https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/ > > $ cd bpf-next > > $ make -s O=build distclean > ../../scripts/Makefile.include:4: *** O=/tmp/bpf-next/build/tools/bpf/resolve_btfids does not exist. Stop. > > I do not really see how this could be environment related. It seems like > this comes from tools/scripts/Makefile.include, where there is no > guarantee that $(O) is created before being used like in the main > Makefile? right, we need to handle the case where tools/bpf/resolve_btfids does not exist, patch below fixes it for me jirka --- diff --git a/Makefile b/Makefile index 159d9592b587..ce9685961abe 100644 --- a/Makefile +++ b/Makefile @@ -1088,8 +1088,14 @@ endif PHONY += resolve_btfids_clean +resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids + +# tools/bpf/resolve_btfids directory might not exist +# in output directory, skip its clean in that case resolve_btfids_clean: - $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(abspath $(objtree))/tools/bpf/resolve_btfids clean +ifneq (,$(wildcard $(resolve_btfids_O))) + $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean +endif ifdef CONFIG_BPF ifdef CONFIG_DEBUG_INFO_BTF
