linux-kernel - Re: [PATCH v4 2/6] perf tools: Promote proper messages for cross-platform unwind

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Date:	Thu, 19 May 2016 18:46:09 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	He Kuang <hekuang@...wei.com>
Cc:	peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
	alexander.shishkin@...ux.intel.com, wangnan0@...wei.com,
	jpoimboe@...hat.com, ak@...ux.intel.com, eranian@...gle.com,
	namhyung@...nel.org, adrian.hunter@...el.com,
	sukadev@...ux.vnet.ibm.com, masami.hiramatsu.pt@...achi.com,
	tumanova@...ux.vnet.ibm.com, kan.liang@...el.com,
	penberg@...nel.org, dsahern@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/6] perf tools: Promote proper messages for
 cross-platform unwind

On Thu, May 19, 2016 at 11:47:38AM +0000, He Kuang wrote:

SNIP

>  #endif /* ARCH_PERF_COMMON_H */
> diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
> index 1e46277..a86b864 100644
> --- a/tools/perf/config/Makefile
> +++ b/tools/perf/config/Makefile
> @@ -345,6 +345,12 @@ ifeq ($(ARCH),powerpc)
>  endif
>  
>  ifndef NO_LIBUNWIND
> +  ifeq ($(feature-libunwind-x86), 1)
> +    LIBUNWIND_LIBS += -lunwind-x86
> +    $(call detected,CONFIG_LIBUNWIND_X86)
> +    CFLAGS += -DHAVE_LIBUNWIND_X86_SUPPORT
> +  endif
> +

how does one install that lirary?

thanks,
jirka