linux-kernel - Re: [PATCH] perf tools: Fix build errors on tsc functions for archs other than x86

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Message-ID: <56FE754B.8030304@huawei.com>
Date:	Fri, 1 Apr 2016 21:19:07 +0800
From:	Hekuang <hekuang@...wei.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
CC:	<peterz@...radead.org>, <mingo@...hat.com>,
	<alexander.shishkin@...ux.intel.com>, <adrian.hunter@...el.com>,
	<jolsa@...hat.com>, <jpoimboe@...hat.com>,
	<sukadev@...ux.vnet.ibm.com>, <eranian@...gle.com>,
	<wangnan0@...wei.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf tools: Fix build errors on tsc functions for archs
 other than x86


hi,
在 2016/4/1 21:13, Arnaldo Carvalho de Melo 写道:
> Em Fri, Apr 01, 2016 at 03:49:32AM +0000, He Kuang escreveu:
>> Build errors on aarch64:
>>
>>    libperf.a(libperf-in.o): In function `convert_timestamp':
>>    util/jitdump.c:356: undefined reference to `tsc_to_perf_time'
>>    collect2: error: ld returned 1 exit status
>>    Makefile.perf:347: recipe for target 'perf' failed
>>    make[1]: *** [perf] Error 1
>>    Makefile:68: recipe for target 'all' failed
>>    make: *** [all] Error 2
> Got it, my cross-compile environment for aarch64 doesn't build jitdump.c
> because it needs a package I haven't found in ubuntu:
>
> config/Makefile:416: No libcrypto.h found, disables jitted code injection, please install libssl-devel or libssl-dev
> minimal-ubuntu-x-arm64: Ok
>
> BTW, He, what environment do you use to build for arm64, is it a cross
> compile one? Yocto?

I use buildroot, though my colleague prefers yocto(oxygen).

In my environment, libcrypto is on.
...                     libcrypto: [ on  ]

>
> - Arnaldo
>
>
>   
>> Since tsc conversion functions were moved out from arch dir, move
>> 'tsc.h' out from x86 dir to make it possible to compile for other archs.
>>
>> Signed-off-by: He Kuang <hekuang@...wei.com>
>> ---
>>   tools/perf/arch/x86/util/tsc.c |  1 -
>>   tools/perf/arch/x86/util/tsc.h | 17 -----------------
>>   tools/perf/util/Build          |  3 +--
>>   tools/perf/util/tsc.h          | 11 ++++++++++-
>>   4 files changed, 11 insertions(+), 21 deletions(-)
>>   delete mode 100644 tools/perf/arch/x86/util/tsc.h
>>
>> diff --git a/tools/perf/arch/x86/util/tsc.c b/tools/perf/arch/x86/util/tsc.c
>> index 70ff7c1..357f1b1 100644
>> --- a/tools/perf/arch/x86/util/tsc.c
>> +++ b/tools/perf/arch/x86/util/tsc.c
>> @@ -7,7 +7,6 @@
>>   #include <linux/types.h>
>>   #include "../../util/debug.h"
>>   #include "../../util/tsc.h"
>> -#include "tsc.h"
>>   
>>   int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
>>   			     struct perf_tsc_conversion *tc)
>> diff --git a/tools/perf/arch/x86/util/tsc.h b/tools/perf/arch/x86/util/tsc.h
>> deleted file mode 100644
>> index 2edc4d3..0000000
>> --- a/tools/perf/arch/x86/util/tsc.h
>> +++ /dev/null
>> @@ -1,17 +0,0 @@
>> -#ifndef TOOLS_PERF_ARCH_X86_UTIL_TSC_H__
>> -#define TOOLS_PERF_ARCH_X86_UTIL_TSC_H__
>> -
>> -#include <linux/types.h>
>> -
>> -struct perf_tsc_conversion {
>> -	u16 time_shift;
>> -	u32 time_mult;
>> -	u64 time_zero;
>> -};
>> -
>> -struct perf_event_mmap_page;
>> -
>> -int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
>> -			     struct perf_tsc_conversion *tc);
>> -
>> -#endif /* TOOLS_PERF_ARCH_X86_UTIL_TSC_H__ */
>> diff --git a/tools/perf/util/Build b/tools/perf/util/Build
>> index da48fd8..85ceff3 100644
>> --- a/tools/perf/util/Build
>> +++ b/tools/perf/util/Build
>> @@ -69,8 +69,7 @@ libperf-y += stat-shadow.o
>>   libperf-y += record.o
>>   libperf-y += srcline.o
>>   libperf-y += data.o
>> -libperf-$(CONFIG_X86) += tsc.o
>> -libperf-$(CONFIG_AUXTRACE) += tsc.o
>> +libperf-y += tsc.o
>>   libperf-y += cloexec.o
>>   libperf-y += thread-stack.o
>>   libperf-$(CONFIG_AUXTRACE) += auxtrace.o
>> diff --git a/tools/perf/util/tsc.h b/tools/perf/util/tsc.h
>> index 280ddc0..d5b11e2 100644
>> --- a/tools/perf/util/tsc.h
>> +++ b/tools/perf/util/tsc.h
>> @@ -4,7 +4,16 @@
>>   #include <linux/types.h>
>>   
>>   #include "event.h"
>> -#include "../arch/x86/util/tsc.h"
>> +
>> +struct perf_tsc_conversion {
>> +	u16 time_shift;
>> +	u32 time_mult;
>> +	u64 time_zero;
>> +};
>> +struct perf_event_mmap_page;
>> +
>> +int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
>> +			     struct perf_tsc_conversion *tc);
>>   
>>   u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc);
>>   u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc);
>> -- 
>> 1.8.5.2