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Date: Tue, 22 Sep 2015 09:02:59 +0200
From: Jiri Olsa <jolsa@redhat.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>, Ingo Molnar <mingo@kernel.org>,
        linux-kernel@vger.kernel.org, Wang Nan <wangnan0@huawei.com>,
        Brendan Gregg <brendan.d.gregg@gmail.com>,
        Daniel Borkmann <daniel@iogearbox.net>,
        David Ahern <dsahern@gmail.com>, He Kuang <hekuang@huawei.com>,
        Kaixu Xia <xiakaixu@huawei.com>,
        Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
        Namhyung Kim <namhyung@kernel.org>, Paul Mackerras <paulus@samba.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>, Zefan Li <lizefan@huawei.com>,
        pi3orama@163.com, Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: [PATCH 8/8] perf tools: Make perf depend on libbpf
Message-ID: <20150922070259.GG29091@krava.redhat.com>
References: <1442870601-26004-1-git-send-email-acme@kernel.org>
 <1442870601-26004-9-git-send-email-acme@kernel.org>
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On Mon, Sep 21, 2015 at 06:23:21PM -0300, Arnaldo Carvalho de Melo wrote:

SNIP

> +      NO_LIBBPF := 1
>      else
>        ifneq ($(filter s% -static%,$(LDFLAGS),),)
>          msg := $(error No static glibc found, please install glibc-static);
> @@ -309,6 +312,13 @@ ifndef NO_LIBELF
>        $(call detected,CONFIG_DWARF)
>      endif # PERF_HAVE_DWARF_REGS
>    endif # NO_DWARF
> +
> +  ifndef NO_LIBBPF
> +    ifeq ($(feature-bpf), 1)
> +      CFLAGS += -DHAVE_LIBBPF_SUPPORT
> +      $(call detected,CONFIG_LIBBPF)

what depends on CONFIG_LIBBPF ? I dont see any object being dependent on it

jirka