From: Jiri Olsa <jolsa@redhat.com>
To: "Wangnan (F)" <wangnan0@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
David Ahern <dsahern@gmail.com>, Ingo Molnar <mingo@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [RFC 6/6] perf build: Introduce FEATURES_DUMP make variable
Date: Wed, 13 Jan 2016 10:19:13 +0100 [thread overview]
Message-ID: <20160113091913.GA4487@krava.brq.redhat.com> (raw)
In-Reply-To: <5694C73C.3070007@huawei.com>
On Tue, Jan 12, 2016 at 05:28:28PM +0800, Wangnan (F) wrote:
SNIP
> For example:
>
> $ make feature-dump LDFLAGS="-static"
> BUILD: Doing 'make -j24' parallel build
>
> Auto-detecting system features:
> <SNIP>
> ... zlib: [ on ]
> ... lzma: [ OFF ] <--- looks good. I don't have
> static lzma library
> ... get_cpuid: [ on ]
> ... bpf: [ on ]
>
>
> $ make feature-dump
> BUILD: Doing 'make -j24' parallel build
>
> Auto-detecting system features:
> <SNIP>
> ... zlib: [ on ]
> ... lzma: [ on ] <--- also good
> ... get_cpuid: [ on ]
> ... bpf: [ on ]
>
>
> $ make feature-dump LDFLAGS="-static"
> BUILD: Doing 'make -j24' parallel build
>
> Auto-detecting system features:
> <SNIP>
> ... zlib: [ on ]
> ... lzma: [ on ] <--- Bad...
> ... get_cpuid: [ on ]
> ... bpf: [ on ]
>
> Thank you.
right, it's because feature is not under build framework and
compilation does not care about flags change..
I'll try to check on that.. does this patch help to improve
the current speed or do you need to solve this to get substantial
speedup?
thanks,
jirka
next prev parent reply other threads:[~2016-01-13 9:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-11 10:54 [PATCH 0/6] tools: Add clean targets for tools directory Jiri Olsa
2016-01-11 10:54 ` [PATCH 1/6] " Jiri Olsa
2016-01-12 10:06 ` [tip:perf/urgent] " tip-bot for Jiri Olsa
2016-01-11 10:54 ` [PATCH 2/6] tools bpf: Add *.cmd files clean up Jiri Olsa
2016-01-12 10:07 ` [tip:perf/urgent] " tip-bot for Jiri Olsa
2016-01-11 10:54 ` [PATCH 3/6] tools lockdep: " Jiri Olsa
2016-01-12 10:07 ` [tip:perf/urgent] " tip-bot for Jiri Olsa
2016-01-11 10:54 ` [PATCH 4/6] perf tools: Add missing sources in perf's MANIFEST Jiri Olsa
2016-01-12 10:07 ` [tip:perf/urgent] perf tools: Add missing sources to perf' s MANIFEST tip-bot for Jiri Olsa
2016-01-11 10:54 ` [RFC 5/6] perf build: Add feature-dump target Jiri Olsa
2016-01-11 10:54 ` [RFC 6/6] perf build: Introduce FEATURES_DUMP make variable Jiri Olsa
2016-01-12 9:28 ` Wangnan (F)
2016-01-13 9:19 ` Jiri Olsa [this message]
2016-01-13 9:46 ` Wangnan (F)
2016-01-13 10:03 ` Jiri Olsa
2016-01-13 10:11 ` Wangnan (F)
2016-01-13 12:02 ` Wangnan (F)
2016-01-13 12:15 ` Jiri Olsa
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