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Date: Tue, 1 Sep 2015 10:30:29 +0200
From: Ingo Molnar <mingo@kernel.org>
To: Stephane Eranian <eranian@google.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Jiri Olsa <jolsa@redhat.com>, Peter Zijlstra <peterz@infradead.org>,
        "mingo@elte.hu" <mingo@elte.hu>, Namhyung Kim <namhyung@kernel.org>,
        Adrian Hunter <adrian.hunter@intel.com>
Subject: Re: [BUG] perf: does not compile on ARM because of Intel PT code
Message-ID: <20150901083029.GB25398@gmail.com>
References: <CABPqkBR_zU6QYDq0Gbgf8QirkBW5-HDONujf2KHKLtGwC07cOQ@mail.gmail.com>
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* Stephane Eranian <eranian@google.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