From: Jiri Olsa <jolsa@redhat.com>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Nathan Chancellor <nathan@kernel.org>,
Jiri Olsa <jolsa@kernel.org>, Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andriin@fb.com>,
Song Liu <songliubraving@fb.com>,
Networking <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Michal Marek <michal.lkml@markovi.net>,
Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>
Subject: Re: [PATCH bpf-next 4/4] kbuild: Add resolve_btfids clean to root clean target
Date: Thu, 11 Feb 2021 13:17:22 +0100 [thread overview]
Message-ID: <YCUgUlCDGTS85MCO@krava> (raw)
In-Reply-To: <CAEf4BzbwwtqerxRrNZ75WLd2aHLdnr7wUrKahfT7_6bjBgJ0xQ@mail.gmail.com>
On Wed, Feb 10, 2021 at 11:26:28AM -0800, Andrii Nakryiko wrote:
SNIP
> > > > 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
> >
>
> Looks good to me, please send it as a proper patch to bpf-next.
>
> But I'm curious, why is objtool not doing something like that? Is it
> not doing clean at all? Or does it do it in some different way?
yes, it's not connected to global make clean
>
> >
> > ---
> > 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 $(resolve_btfids_O)))
>
> nit: kind of backwards, usually it's in a `ifneq($var,)` form
ok
thanks,
jirka
next prev parent reply other threads:[~2021-02-11 12:21 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 12:40 [PATCHv2 bpf-next 0/4] kbuild/resolve_btfids: Invoke resolve_btfids clean in root Makefile Jiri Olsa
2021-02-05 12:40 ` [PATCH bpf-next 1/4] tools/resolve_btfids: Build libbpf and libsubcmd in separate directories Jiri Olsa
2021-02-05 22:24 ` Andrii Nakryiko
2021-03-10 17:27 ` Viktor Jägersküpper
2021-03-10 19:27 ` Andrii Nakryiko
2021-03-10 22:42 ` Jiri Olsa
2021-02-05 12:40 ` [PATCH bpf-next 2/4] tools/resolve_btfids: Check objects before removing Jiri Olsa
2021-02-05 23:19 ` Andrii Nakryiko
2021-02-05 12:40 ` [PATCH bpf-next 3/4] tools/resolve_btfids: Set srctree variable unconditionally Jiri Olsa
2021-02-05 22:25 ` Andrii Nakryiko
2021-02-05 12:40 ` [PATCH bpf-next 4/4] kbuild: Add resolve_btfids clean to root clean target Jiri Olsa
2021-02-06 5:11 ` Amy Parker
2021-02-10 17:44 ` Nathan Chancellor
2021-02-10 17:52 ` Andrii Nakryiko
2021-02-10 18:02 ` Nathan Chancellor
2021-02-10 18:29 ` Jiri Olsa
2021-02-10 18:37 ` Nathan Chancellor
2021-02-10 19:26 ` Andrii Nakryiko
2021-02-11 12:17 ` Jiri Olsa [this message]
2021-02-12 3:30 ` Masahiro Yamada
2021-02-12 13:35 ` Jiri Olsa
2021-02-10 19:23 ` Andrii Nakryiko
2021-02-10 18:14 ` Jiri Olsa
2021-02-05 22:27 ` [PATCHv2 bpf-next 0/4] kbuild/resolve_btfids: Invoke resolve_btfids clean in root Makefile Andrii Nakryiko
2021-02-05 22:32 ` Jiri Olsa
2021-02-06 0:00 ` Jiri Olsa
2021-02-09 5:36 ` Andrii Nakryiko
2021-02-09 9:30 ` Jiri Olsa
[not found] <20210129134855.195810-1-jolsa@redhat.com>
2021-02-04 21:18 ` [PATCH " Jiri Olsa
2021-02-04 21:18 ` [PATCH bpf-next 4/4] kbuild: Add resolve_btfids clean to root clean target Jiri Olsa
2021-02-04 23:42 ` Song Liu
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