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

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Message-ID: <CABPqkBR_zU6QYDq0Gbgf8QirkBW5-HDONujf2KHKLtGwC07cOQ@mail.gmail.com>
Date:	Tue, 1 Sep 2015 01:26:13 -0700
From:	Stephane Eranian <eranian@...gle.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	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: [BUG] perf: does not compile on ARM because of Intel PT code

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.
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