linux-kernel - Re: [PATCH] tools build: Remove FEATURE-DUMP

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Date:	Fri, 18 Dec 2015 16:41:05 +0800
From:	"Wangnan (F)" <wangnan0@...wei.com>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	<acme@...hat.com>, <linux-kernel@...r.kernel.org>,
	<pi3orama@....com>, <lizefan@...wei.com>,
	Jiri Olsa <jolsa@...nel.org>
Subject: Re: [PATCH] tools build: Remove FEATURE-DUMP



On 2015/12/7 21:52, Jiri Olsa wrote:
> On Mon, Dec 07, 2015 at 10:48:58AM +0000, Wang Nan wrote:
>> Jiri introduces a FEATURE-INCLUDE file for feature checking. It
>> contains same information with FEATURE-DUMP, so we can avoid generating
>> FEATURE-DUMP.
>>
>> Following modification should ensure FEATURE_TESTS contains
>> FEATURE_DISPLAY.
>>
>> Signed-off-by: Wang Nan <wangnan0@...wei.com>
>> Cc: Jiri Olsa <jolsa@...nel.org>
>> ---
>>
>> I haven't thoroughly tested this patch, just want to show the
>> possibility of removing FEATURE-DUMP. I don't insist on this. Jiri, if
>> you find this patch is not good please simply ignore it.
>>
>> Thank you.
>>
>> ---
>>
>>   tools/build/Makefile.feature | 8 +++-----
>>   tools/lib/bpf/.gitignore     | 1 -
>>   tools/lib/bpf/Makefile       | 2 +-
>>   tools/perf/.gitignore        | 1 -
>>   tools/perf/Makefile.perf     | 2 +-
>>   5 files changed, 5 insertions(+), 9 deletions(-)
>>
>> diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
>> index 51f8d59..98a13bd 100644
>> --- a/tools/build/Makefile.feature
>> +++ b/tools/build/Makefile.feature
>> @@ -123,10 +123,6 @@ define feature_print_text_code
>>       MSG = $(shell printf '...%30s: %s' $(1) $(2))
>>   endef
>>   
>> -FEATURE_DUMP_FILENAME = $(OUTPUT)FEATURE-DUMP$(FEATURE_USER)
>> -FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),feature-$(feat)($(feature-$(feat))))
>> -FEATURE_DUMP_FILE := $(shell touch $(FEATURE_DUMP_FILENAME); cat $(FEATURE_DUMP_FILENAME))
>> -
>>   ifeq ($(dwarf-post-unwind),1)
>>     FEATURE_DUMP += dwarf-post-unwind($(dwarf-post-unwind-text))
>>   endif
>> @@ -141,6 +137,9 @@ endif
>>   # features detection state.
>>   FEATURE_INCLUDE_FILENAME = $(OUTPUT)FEATURE-INCLUDE$(FEATURE_USER)
>>   
>> +FEATURE_DUMP := $(foreach feat,$(FEATURE_DISPLAY),feature-$(feat)=$(feature-$(feat)))
>> +FEATURE_DUMP_FILE := $(foreach feat,$(FEATURE_DISPLAY),$(shell touch $(FEATURE_INCLUDE_FILENAME); cat $(FEATURE_INCLUDE_FILENAME) | grep 'feature-$(feat)='))
> hum, this ignores dwarf-post-unwind setup, I think it needs more changes
> I'll post new version

Hi Jiri,

What the current status of this patch and 'tools build: Introduce
features dump include makefile'? They are in my local tree for a long time.

Thank you.


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