linux-kernel - Re: [GIT PULL 00/15] perf/urgent fixes

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Date:	Thu, 07 Jun 2012 11:19:10 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	David Ahern <dsahern@...il.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	linux-kernel@...r.kernel.org,
	Akihiro Nagai <akihiro.nagai.hw@...achi.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Anton Arapov <anton@...hat.com>,
	Avik Sil <avik.sil@...aro.org>,
	Borislav Petkov <borislav.petkov@....com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung.kim@....com>,
	Oleg Nesterov <oleg@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Stephane Eranian <eranian@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [GIT PULL 00/15] perf/urgent fixes

Hi, David

On Wed, 06 Jun 2012 16:50:31 -0600, David Ahern wrote:
> On 6/6/12 12:50 AM, Ingo Molnar wrote:
>> Hm, I got this build failure:
>>
>> bench/mem-memcpy.c: In function ‘bench_mem_memcpy’:
>> bench/mem-memcpy.c:193:2: error: implicit declaration of function ‘perf_atoll’ [-Werror=implicit-function-declaration]
>> bench/mem-memcpy.c:193:2: error: nested extern declaration of ‘perf_atoll’ [-Werror=nested-externs]
>
> I just created a new F17-x86_64 VM and Arnaldo's perf/urgent branch
> builds fine (which includes this patch).
>

I can reproduce it on my F17-x86_64 - current tip + your patch gives:

$ make
PERF_VERSION = 3.5.rc1.99.g7ac4a
    CC perf.o
    CC builtin-annotate.o
    CC builtin-bench.o
    CC bench/sched-messaging.o
    CC bench/sched-pipe.o
    CC bench/mem-memcpy-x86-64-asm.o
    CC bench/mem-memset-x86-64-asm.o
    CC bench/mem-memcpy.o
bench/mem-memcpy.c: In function ‘bench_mem_memcpy’:
bench/mem-memcpy.c:193:2: error: implicit declaration of function ‘perf_atoll’ [-Werror=implicit-function-declaration]
bench/mem-memcpy.c:193:2: error: nested extern declaration of ‘perf_atoll’ [-Werror=nested-externs]
cc1: all warnings being treated as errors
make: *** [bench/mem-memcpy.o] Error 1



>>
>> Which appears to be a result of:
>>
>> 6b7df4a0237a perf tool: Build fix, remove duplicate declarations
>>
>> Those declarations were not so unused on this fresh install of
>> Fedora 17.
>
> 32-bit? 64-bit?
>
> This would fix your compile problem, but I have no way of verifying
> since it builds fine for me.
>
> diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
> index 7155722..535b4b8 100644
> --- a/tools/perf/bench/mem-memcpy.c
> +++ b/tools/perf/bench/mem-memcpy.c
> @@ -10,6 +10,7 @@
>  #include "../util/util.h"
>  #include "../util/parse-options.h"
>  #include "../util/header.h"
> +#include "../util/string.h"
>  #include "bench.h"
>  #include "mem-memcpy-arch.h"

After applying this (on top of your patch):

$ make
PERF_VERSION = 3.5.rc1.99.g7ac4a.dirty
    CC perf.o
    CC bench/mem-memcpy.o
bench/mem-memcpy.c:13:28: fatal error: ../util/string.h: No such file or directory
compilation terminated.
make: *** [bench/mem-memcpy.o] Error 1

Thanks,
Namhyung
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