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

[Jiri Olsa]

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