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Date: Thu, 19 May 2016 18:46:09 +0200
From: Jiri Olsa <jolsa@redhat.com>
To: He Kuang <hekuang@huawei.com>
Cc: peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
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Subject: Re: [PATCH v4 2/6] perf tools: Promote proper messages for
 cross-platform unwind
Message-ID: <20160519164609.GC18909@krava>
References: <1463658462-85131-1-git-send-email-hekuang@huawei.com>
 <1463658462-85131-3-git-send-email-hekuang@huawei.com>
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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