linux-kernel - Re: [PATCH] perf: fix 'make help' message error

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Date:	Tue, 03 Jun 2014 11:51:04 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Jianyu Zhan <nasa4836@...il.com>
Cc:	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	acme@...nel.org, jolsa@...nel.org, jean.pihet@...aro.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf: fix 'make help' message error

Hi Jianyu,

On Tue, 3 Jun 2014 00:53:16 +0800, Jianyu Zhan wrote:
> On Tue, Jun 3, 2014 at 12:44 AM, Jianyu Zhan <nasa4836@...il.com> wrote:
>> Hi, Namhyung,
>>
>>>I don't know what's the correct way to do this.  But it seems like the
>>>prefix was overwritten when given from user, so below patch will work
>>>also.
>>
>> This does work too. So I update the patch as below:
>>
>> ---8<---
>> From: Jianyu Zhan <nasa4836@...il.com>
>> Date: Sat, 24 May 2014 22:34:26 +0800
>> Subject: [PATCH] perf: fix 'make help' message error
>>
>> Currently 'make help' message has such hint:
>>
>>    use "make prefix=<path> <install target>" to install to a particular
>>        path like make prefix=/usr/local install install-doc
>>
>> But this is misleading, when I specify "prefix=/usr/local", it has got no
>> respect at all.
>>
>> This is because that, "DESTDIR" is condiered first. In this case, "DESTDIR"

s/condiered/considered/ ?


>> has an empty value, so "prefix" is honored. However, "prefix" is unconditionally
>> assigned to $HOME, regardless of what it is set to from command line. So our
>> "prefix" setting got no respect and the actual destination falls back to $HOME.
>>
>> This patch fixes this issue and corrects the help message.

With that changed,

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung


>> ---
>>  tools/perf/Makefile.perf   | 4 ++--
>>  tools/perf/config/Makefile | 2 +-
>>  2 files changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
>> index 895edd3..5918063 100644
>> --- a/tools/perf/Makefile.perf
>> +++ b/tools/perf/Makefile.perf
>> @@ -784,8 +784,8 @@ help:
>>         @echo ''
>>         @echo 'Perf install targets:'
>>         @echo '  NOTE: documentation build requires asciidoc, xmlto packages to be installed'
>> -       @echo '  HINT: use "make prefix=<path> <install target>" to install to a particular'
>> -       @echo '        path like make prefix=/usr/local install install-doc'
>> +       @echo '  HINT: use "prefix" or "DESTDIR" to install to a particular'
>> +       @echo '        path like "make prefix=/usr/local install install-doc"'
>>         @echo '  install        - install compiled binaries'
>>         @echo '  install-doc    - install *all* documentation'
>>         @echo '  install-man    - install manpage documentation'
>> diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
>> index 802cf54..53dc11e 100644
>> --- a/tools/perf/config/Makefile
>> +++ b/tools/perf/config/Makefile
>> @@ -601,7 +601,7 @@ endif
>>
>>
>>  # Make the path relative to DESTDIR, not to prefix
>>  ifndef DESTDIR
>> -prefix = $(HOME)
>> +prefix ?= $(HOME)
>>  endif
>>  bindir_relative = bin
>>  bindir = $(prefix)/$(bindir_relative)
>
> Cc Namyung with a correct email...
>
>
> Thanks,
> Jianyu Zhan
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