linux-kernel - Re: [PATCH 1/2] perf tools: Fix build on powerpc broken by pt/bts

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Date:	Wed, 26 Aug 2015 10:27:09 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	linux-kernel@...r.kernel.org,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Subject: Re: [PATCH 1/2] perf tools: Fix build on powerpc broken by pt/bts

On 26/08/15 10:25, Jiri Olsa wrote:
> On Wed, Aug 26, 2015 at 09:57:13AM +0300, Adrian Hunter wrote:
>> On 25/08/15 18:30, Arnaldo Carvalho de Melo wrote:
>>> Em Tue, Aug 25, 2015 at 01:42:27PM +0300, Adrian Hunter escreveu:
>>>> It is theoretically possible to process perf.data files created on
>>>> x86 and that contain Intel PT or Intel BTS data, on any other
>>>> architecture, which is why it is possible for there to be build
>>>> errors on powerpc caused by pt/bts.
>>>>
>>>> The errors were:
>>>>
>>>> 	util/intel-pt-decoder/intel-pt-insn-decoder.c: In function ‘intel_pt_insn_decoder’:
>>>> 	util/intel-pt-decoder/intel-pt-insn-decoder.c:138:3: error: switch missing default case [-Werror=switch-default]
>>>> 	   switch (insn->immediate.nbytes) {
>>>> 	   ^
>>>> 	cc1: all warnings being treated as errors
>>>>
>>>> 	linux-acme.git/tools/perf/perf-obj/libperf.a(libperf-in.o): In function `intel_pt_synth_branch_sample':
>>>> 	sources/linux-acme.git/tools/perf/util/intel-pt.c:871: undefined reference to `tsc_to_perf_time'
>>>> 	linux-acme.git/tools/perf/perf-obj/libperf.a(libperf-in.o): In function `intel_pt_sample':
>>>> 	sources/linux-acme.git/tools/perf/util/intel-pt.c:915: undefined reference to `tsc_to_perf_time'
>>>> 	sources/linux-acme.git/tools/perf/util/intel-pt.c:962: undefined reference to `tsc_to_perf_time'
>>>> 	linux-acme.git/tools/perf/perf-obj/libperf.a(libperf-in.o): In function `intel_pt_process_event':
>>>> 	sources/linux-acme.git/tools/perf/util/intel-pt.c:1454: undefined reference to `perf_time_to_tsc'
>>>>
>>>> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
>>>> ---
>>>>  tools/perf/util/Build                                    | 2 +-
>>>>  tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c | 3 +++
>>>>  2 files changed, 4 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/tools/perf/util/Build b/tools/perf/util/Build
>>>> index e912856cc4e5..8ae31e5131ee 100644
>>>> --- a/tools/perf/util/Build
>>>> +++ b/tools/perf/util/Build
>>>> @@ -74,7 +74,7 @@ libperf-y += stat-shadow.o
>>>>  libperf-y += record.o
>>>>  libperf-y += srcline.o
>>>>  libperf-y += data.o
>>>> -libperf-$(CONFIG_X86) += tsc.o
>>>> +libperf-$(if $(CONFIG_X86)$(CONFIG_AUXTRACE),y) += tsc.o
>>>
>>> I think this is preferred/more clear:
>>>
>>> libperf-$(CONFIG_X86) += tsc.o
>>> libperf-$(CONFIG_AUXTRACE) += tsc.o
>>
>> I tried that first but it doesn't work:
>>
>> util/tsc.o: In function `perf_time_to_tsc':
>> /mnt/ssd/ahunter/git/linux-perf/tools/perf/util/tsc.c:7: multiple definition of `perf_time_to_tsc'
>> util/tsc.o:/mnt/ssd/ahunter/git/linux-perf/tools/perf/util/tsc.c:7: first defined here
>> util/tsc.o: In function `tsc_to_perf_time':
>> /mnt/ssd/ahunter/git/linux-perf/tools/perf/util/tsc.c:18: multiple definition of `tsc_to_perf_time'
>> util/tsc.o:/mnt/ssd/ahunter/git/linux-perf/tools/perf/util/tsc.c:18: first defined here
>> make[3]: *** [util/libperf-in.o] Error 1
>> make[2]: *** [util] Error 2
>> make[1]: *** [libperf-in.o] Error 2
>> make: *** [all] Error 2
>>
>> I will have a look at why, unless Jiri knows?
>>
> 
> I'm now testing attached patch, does it fix it for you?

Yup!  Thanks Jiri! :-)

> 
> thanks,
> jirka
> 
> 
> ---
> diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build
> index 8120af9c0341..0c5f485521d6 100644
> --- a/tools/build/Makefile.build
> +++ b/tools/build/Makefile.build
> @@ -63,7 +63,7 @@ quiet_cmd_gen = GEN      $@
>  # If there's nothing to link, create empty $@ object.
>  quiet_cmd_ld_multi = LD       $@
>        cmd_ld_multi = $(if $(strip $(obj-y)),\
> -		       $(LD) -r -o $@ $(obj-y),rm -f $@; $(AR) rcs $@)
> +		       $(LD) -r -o $@  $(filter $(obj-y),$^),rm -f $@; $(AR) rcs $@)
>  
>  # Build rules
>  $(OUTPUT)%.o: %.c FORCE
> diff --git a/tools/build/tests/ex/Build b/tools/build/tests/ex/Build
> index 70d876237c57..429c7d452101 100644
> --- a/tools/build/tests/ex/Build
> +++ b/tools/build/tests/ex/Build
> @@ -1,6 +1,7 @@
>  ex-y += ex.o
>  ex-y += a.o
>  ex-y += b.o
> +ex-y += b.o
>  ex-y += empty/
>  ex-y += empty2/
>  
> 
> 

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