netdev - Re: [PATCH bpf-next v4 04/10] tools/runqslower: Use consistent include paths for libbpf

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Message-ID: <CAEf4BzZ7x4F_-bjGg7TdzXcin6c1BAT6OKe53ujh1tx-GB6-ZQ@mail.gmail.com>
Date:   Mon, 20 Jan 2020 10:35:56 -0800
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Toke Høiland-Jørgensen <toke@...hat.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        John Fastabend <john.fastabend@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Shuah Khan <shuah@...nel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-rdma@...r.kernel.org,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH bpf-next v4 04/10] tools/runqslower: Use consistent
 include paths for libbpf

On Mon, Jan 20, 2020 at 4:57 AM Toke Høiland-Jørgensen <toke@...hat.com> wrote:
>
> Andrii Nakryiko <andrii.nakryiko@...il.com> writes:
>
> > On Fri, Jan 17, 2020 at 5:37 AM Toke Høiland-Jørgensen <toke@...hat.com> wrote:
> >>
> >> From: Toke Høiland-Jørgensen <toke@...hat.com>
> >>
> >> Fix the runqslower tool to include libbpf header files with the bpf/
> >> prefix, to be consistent with external users of the library. Also ensure
> >> that all includes of exported libbpf header files (those that are exported
> >> on 'make install' of the library) use bracketed includes instead of quoted.
> >>
> >> To not break the build, keep the old include path until everything has been
> >> changed to the new one; a subsequent patch will remove that.
> >>
> >> Fixes: 6910d7d3867a ("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir")
> >> Acked-by: Andrii Nakryiko <andriin@...com>
> >> Signed-off-by: Toke Høiland-Jørgensen <toke@...hat.com>
> >> ---
> >>  tools/bpf/runqslower/Makefile         |    5 +++--
> >>  tools/bpf/runqslower/runqslower.bpf.c |    2 +-
> >>  tools/bpf/runqslower/runqslower.c     |    4 ++--
> >>  3 files changed, 6 insertions(+), 5 deletions(-)
> >>
> >> diff --git a/tools/bpf/runqslower/Makefile b/tools/bpf/runqslower/Makefile
> >> index b62fc9646c39..9f022f7f2593 100644
> >> --- a/tools/bpf/runqslower/Makefile
> >> +++ b/tools/bpf/runqslower/Makefile
> >> @@ -5,6 +5,7 @@ LLC := llc
> >>  LLVM_STRIP := llvm-strip
> >>  DEFAULT_BPFTOOL := $(OUTPUT)/sbin/bpftool
> >>  BPFTOOL ?= $(DEFAULT_BPFTOOL)
> >> +INCLUDES := -I$(OUTPUT) -I$(abspath ../../lib) -I$(abspath ../../lib/bpf)
> >>  LIBBPF_SRC := $(abspath ../../lib/bpf)
> >
> > drop LIBBPF_SRC, it's not used anymore
>
> It is: in the rule for building libbpf there's a '-C $(LIBBPF_SRC)'
>

Ah, right, missed that one. Looked a bit weird to have $(abspath
../../lib/bpf) used in INCLUDES and then separate LIBBPF_SRC
definition there, maybe

LIBBPF_SRC := $(abspath ../../lib/bpf)
INCLUDES := -I$(OUTPUT) -I$(abspath ../../lib) -I$(LIBBPF_SRC)

> -Toke
>