linux-kernel - Re: [PATCH 2/2] perf report: Add gcc option '-rdynamic' to define symbol callchain

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Date:	Thu, 28 Apr 2016 23:49:06 +0900
From:	Kyeongmin Cho <korea.drzix@...il.com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	linux-kernel@...r.kernel.org, Wang Nan <wangnan0@...wei.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH 2/2] perf report: Add gcc option '-rdynamic' to define
 symbol callchain_param

Hi,

Althogh applying my previous patch, it still prints

$ ./perf report --gtk
GTK browser requested but could not find libperf-gtk.so

When printing dlerror() in setup_gtk_browser(),

$ ./perf report --gtk
/home/drzix/lib64/libperf-gtk.so: undefined symbol: callchain_param
GTK browser requested but could not find libperf-gtk.so

After applying this patch, compiling rdynamically to make
libperf-gtk.so find out the symbol, it works.

2016-04-28 23:12 GMT+09:00 Jiri Olsa <jolsa@...hat.com>:
> On Thu, Apr 28, 2016 at 10:00:01PM +0900, Kyeongmin Cho wrote:
>> As libperf-gtk.so cannot find out undefined symbol 'callchain_param',
>> '-rdynamic' option is needed to add the symbol to the dynamic symbol
>> table.
>
> hi,
> following command seems to work for me:
>   $ perf report --gtk
>
> could you please specify what's failing for you?
>
> thanks,
> jirka



-- 
Thanks,
Dr.Zix
" http://cin.fail "