linux-kernel - Re: [PATCH v2 -tip] perf tools: fix building error for arm64.

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Date:	Tue, 17 Mar 2015 21:30:22 +0800
From:	Wang Nan <wangnan0@...wei.com>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	<namhyung@...nel.org>, <jolsa@...nel.org>, <acme@...nel.org>,
	<lizefan@...wei.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 -tip] perf tools: fix building error for arm64.

On 2015/3/17 21:12, Jiri Olsa wrote:
> On Tue, Mar 17, 2015 at 11:33:10AM +0000, Wang Nan wrote:
>> Commit b11db6581beaccef8ae9a388ae96074aa5cc144f ("perf tools: Fix build
>> error on ARCH=i386/x86_64/sparc64") uses sed on ARCH, which triggers a
>> bug in sequence of sed expression, where 's/arm.*/arm/' will replace
>> 'arm64' to 'arm', causes arm64 building failure.
>>
>> This patch replaces 'arm64' to 'aarch64' before 's/arm.*/arm/' to
>> protect arm64 and replaces 'aarch64' back to 'arm64' after fixing
>> 'arm.*'.
>>
>> Signed-off-by: Wang Nan <wangnan0@...wei.com>
>> ---
>> v1 -> v2: Replace tabs with spaces to make new line similay to other lines.
>> ---
>>  tools/perf/config/Makefile.arch | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/tools/perf/config/Makefile.arch b/tools/perf/config/Makefile.arch
>> index e972057..a5b6020 100644
>> --- a/tools/perf/config/Makefile.arch
>> +++ b/tools/perf/config/Makefile.arch
>> @@ -2,8 +2,11 @@ ifndef ARCH
>>  ARCH := $(shell uname -m 2>/dev/null || echo not)
>>  endif
>>  
>> +# Set arm64 to aarch64 before replacing arm.* to arm to protect ARCH = arm64.
>> +# aarch64 will be replaced by arm64 again.
>>  ARCH := $(shell echo $(ARCH) | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
>>                                    -e s/sun4u/sparc/ -e s/sparc64/sparc/ \
>> +                                  -e s/arm64/aarch64/ \
>>                                    -e s/arm.*/arm/ -e s/sa110/arm/ \
>>                                    -e s/s390x/s390/ -e s/parisc64/parisc/ \
>>                                    -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
> 
> hum, could we rather make the 'arm.*' expression complete?
> like this one seems to work:
> 

Sure. It does work. Posted a v3 patch.

> [jolsa@...va perf]$ echo armkrava | sed -e '/arm64/!s/arm.*/arm/'
> arm
> [jolsa@...va perf]$ echo arm64 | sed -e '/arm64/!s/arm.*/arm/'
> arm64
> 
> 
> jirka
> 


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