linux-kernel - Re: [PATCH 1/2] bpftool: Allow to add compiler flags via EXTRA

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Message-ID: <CAPhsuW6x6dUExMdDR1togWCss6hHd5gbJROvs6HN_AoXWz0cmw@mail.gmail.com>
Date:   Mon, 8 Oct 2018 14:02:26 -0700
From:   Song Liu <liu.song.a23@...il.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        open list <linux-kernel@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>
Subject: Re: [PATCH 1/2] bpftool: Allow to add compiler flags via EXTRA_CFLAGS variable

On Mon, Oct 8, 2018 at 1:24 AM Jiri Olsa <jolsa@...nel.org> wrote:
>
> Adding EXTRA_CFLAGS allowing user to specify extra flags
> for CFLAGS variable.
>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Acked-by: Song Liu <songliubraving@...com>

> ---
>  tools/bpf/bpftool/Makefile | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile
> index 74288a2197ab..5bfa07e3f2f7 100644
> --- a/tools/bpf/bpftool/Makefile
> +++ b/tools/bpf/bpftool/Makefile
> @@ -46,6 +46,10 @@ CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
>         -I$(srctree)/tools/lib/bpf \
>         -I$(srctree)/tools/perf
>  CFLAGS += -DBPFTOOL_VERSION='"$(BPFTOOL_VERSION)"'
> +ifneq ($(EXTRA_CFLAGS),)
> +CFLAGS += $(EXTRA_CFLAGS)
> +endif
> +
>  LIBS = -lelf -lbfd -lopcodes $(LIBBPF)
>
>  INSTALL ?= install
> --
> 2.17.2
>