linux-kernel - Re: [PATCH 8/8] perf tools: Make perf depend on libbpf

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Date:	Tue, 22 Sep 2015 09:02:59 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>, Ingo Molnar <mingo@...nel.org>,
	linux-kernel@...r.kernel.org, Wang Nan <wangnan0@...wei.com>,
	Brendan Gregg <brendan.d.gregg@...il.com>,
	Daniel Borkmann <daniel@...earbox.net>,
	David Ahern <dsahern@...il.com>, He Kuang <hekuang@...wei.com>,
	Kaixu Xia <xiakaixu@...wei.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Zefan Li <lizefan@...wei.com>, pi3orama@....com,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [PATCH 8/8] perf tools: Make perf depend on libbpf

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
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