linux-kernel - Re: [BUG] perf: does not compile on ARM because of Intel PT code

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Message-ID: <20150901083029.GB25398@gmail.com>
Date:	Tue, 1 Sep 2015 10:30:29 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	Namhyung Kim <namhyung@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [BUG] perf: does not compile on ARM because of Intel PT code


* Stephane Eranian <eranian@...gle.com> wrote:

> Hi,
> 
> If you compile tip.git on ARM32 (or ARM64, I bet) you compile link time errors:
> 
> libperf.a(libperf-in.o): In function `intel_pt_synth_branch_sample':
> /home/ubuntu/perfmon/linux/tools/perf/util/intel-pt.c:899: undefined
> reference to `tsc_to_perf_time'
> libperf.a(libperf-in.o): In function `intel_pt_synth_transaction_sample':
> /home/ubuntu/perfmon/linux/tools/perf/util/intel-pt.c:992: undefined
> reference to `tsc_to_perf_time'
> libperf.a(libperf-in.o): In function `intel_pt_synth_instruction_sample':
> /home/ubuntu/perfmon/linux/tools/perf/util/intel-pt.c:943: undefined
> reference to `tsc_to_perf_time'
> libperf.a(libperf-in.o): In function `intel_pt_process_event':
> /home/ubuntu/perfmon/linux/tools/perf/util/intel-pt.c:1484: undefined
> reference to `perf_time_to_tsc'
> libperf.a(libperf-in.o): In function `intel_pt_process_itrace_start':
> /home/ubuntu/perfmon/linux/tools/perf/util/intel-pt.c:1455: undefined
> reference to `perf_time_to_tsc'
> libperf.a(libperf-in.o): In function `intel_pt_process_switch':
> /home/ubuntu/perfmon/linux/tools/perf/util/intel-pt.c:1405: undefined
> reference to `perf_time_to_tsc'
> /home/ubuntu/perfmon/linux/tools/perf/util/intel-pt.c:1427: undefined
> reference to `perf_time_to_tsc'
> libperf.a(libperf-in.o): In function `intel_bts_process_event':
> /home/ubuntu/perfmon/linux/tools/perf/util/intel-bts.c:614: undefined
> reference to `perf_time_to_tsc'
> 
> That's because if AUXTRACE is detected, it pulls in x86 specific stuff
> like intel-pt. This should
> be decoupled.

Could you double check the latest tip:perf/urgent or tip:master whether this is 
properly fixed by:

                        #  97db62062ac7 perf tools: Fix build on powerpc broken by pt/bts

?

Thanks,

	Ingo
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