From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>, Andrii Nakryiko <andriin@fb.com>,
bpf <bpf@vger.kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Jiri Olsa <jolsa@redhat.com>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] libbpf: Fix build on read-only filesystems
Date: Fri, 20 Dec 2019 14:01:50 -0800 [thread overview]
Message-ID: <CAEf4BzahazYCzutyULrugwjjz-Fxg_rzJ8v+pXUKpsmzpsHfJQ@mail.gmail.com> (raw)
In-Reply-To: <20191220032558.3259098-1-namhyung@kernel.org>
On Thu, Dec 19, 2019 at 7:26 PM Namhyung Kim <namhyung@kernel.org> wrote:
>
> I got the following error when I tried to build perf on a read-only
> filesystem with O=dir option.
>
> $ cd /some/where/ro/linux/tools/perf
> $ make O=$HOME/build/perf
> ...
> CC /home/namhyung/build/perf/lib.o
> /bin/sh: bpf_helper_defs.h: Read-only file system
> make[3]: *** [Makefile:184: bpf_helper_defs.h] Error 1
> make[2]: *** [Makefile.perf:778: /home/namhyung/build/perf/libbpf.a] Error 2
> make[2]: *** Waiting for unfinished jobs....
> LD /home/namhyung/build/perf/libperf-in.o
> AR /home/namhyung/build/perf/libperf.a
> PERF_VERSION = 5.4.0
> make[1]: *** [Makefile.perf:225: sub-make] Error 2
> make: *** [Makefile:70: all] Error 2
>
> It was becaused bpf_helper_defs.h was generated in current directory.
> Move it to OUTPUT directory.
>
> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
> ---
> tools/lib/bpf/Makefile | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
> index 99425d0be6ff..2f42a35f4634 100644
> --- a/tools/lib/bpf/Makefile
> +++ b/tools/lib/bpf/Makefile
> @@ -159,7 +159,7 @@ all: fixdep
>
> all_cmd: $(CMD_TARGETS) check
>
> -$(BPF_IN_SHARED): force elfdep bpfdep bpf_helper_defs.h
> +$(BPF_IN_SHARED): force elfdep bpfdep $(OUTPUT)bpf_helper_defs.h
btw, there is a lot of $(OUTPUT)bpf_helper_defs.h repetition, could
you please extract it into a variable, similar to BPF_IN_SHARED and
others? E.g., just BPF_HELPER_DEFS would work. Thanks!
> @(test -f ../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \
> (diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \
> echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'" >&2 )) || true
> @@ -177,12 +177,12 @@ $(BPF_IN_SHARED): force elfdep bpfdep bpf_helper_defs.h
> echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h' differs from latest version at 'include/uapi/linux/if_xdp.h'" >&2 )) || true
> $(Q)$(MAKE) $(build)=libbpf OUTPUT=$(SHARED_OBJDIR) CFLAGS="$(CFLAGS) $(SHLIB_FLAGS)"
[...]
prev parent reply other threads:[~2019-12-20 22:02 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-20 3:25 [PATCH] libbpf: Fix build on read-only filesystems Namhyung Kim
2019-12-20 20:29 ` Andrii Nakryiko
2019-12-20 20:47 ` Arnaldo Carvalho de Melo
2019-12-20 21:45 ` Andrii Nakryiko
2019-12-20 21:53 ` Arnaldo Carvalho de Melo
2019-12-20 22:00 ` Andrii Nakryiko
2019-12-20 22:05 ` Arnaldo Carvalho de Melo
2019-12-21 8:25 ` Namhyung Kim
2019-12-21 16:22 ` Alexei Starovoitov
2019-12-23 3:05 ` [PATCH bpf] " Namhyung Kim
2019-12-23 5:45 ` Andrii Nakryiko
2019-12-23 5:45 ` Andrii Nakryiko
2019-12-23 5:54 ` Andrii Nakryiko
2019-12-23 5:54 ` Andrii Nakryiko
2019-12-23 6:09 ` Namhyung Kim
2019-12-23 6:09 ` Namhyung Kim
2019-12-23 6:13 ` [PATCH bpf v3] " Namhyung Kim
2019-12-23 6:29 ` Andrii Nakryiko
2019-12-23 6:29 ` Andrii Nakryiko
2019-12-23 14:39 ` Daniel Borkmann
2019-12-23 14:39 ` Daniel Borkmann
2019-12-20 22:01 ` Andrii Nakryiko [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAEf4BzahazYCzutyULrugwjjz-Fxg_rzJ8v+pXUKpsmzpsHfJQ@mail.gmail.com \
--to=andrii.nakryiko@gmail.com \
--cc=acme@kernel.org \
--cc=andriin@fb.com \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=jolsa@redhat.com \
--cc=kafai@fb.com \
--cc=linux-kernel@vger.kernel.org \
--cc=namhyung@kernel.org \
--cc=songliubraving@fb.com \
--cc=yhs@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.