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

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Message-ID: <CAEf4BzbAV0TmEUL=62jz+RD6SPmu927z-dhGL9JHepcAOGMSJA@mail.gmail.com>
Date:   Fri, 17 Jan 2020 13:51:50 -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 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

>  CFLAGS := -g -Wall
>
> @@ -51,13 +52,13 @@ $(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(BPFTOOL)
>
>  $(OUTPUT)/%.bpf.o: %.bpf.c $(OUTPUT)/libbpf.a | $(OUTPUT)
>         $(call msg,BPF,$@)
> -       $(Q)$(CLANG) -g -O2 -target bpf -I$(OUTPUT) -I$(LIBBPF_SRC)           \
> +       $(Q)$(CLANG) -g -O2 -target bpf $(INCLUDES)           \

please preserve formatting and alignment conventions of a file

>                  -c $(filter %.c,$^) -o $@ &&                                 \
>         $(LLVM_STRIP) -g $@
>
>  $(OUTPUT)/%.o: %.c | $(OUTPUT)
>         $(call msg,CC,$@)
> -       $(Q)$(CC) $(CFLAGS) -I$(LIBBPF_SRC) -I$(OUTPUT) -c $(filter %.c,$^) -o $@
> +       $(Q)$(CC) $(CFLAGS) $(INCLUDES) -c $(filter %.c,$^) -o $@
>
>  $(OUTPUT):

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