linux-kernel - Re: [PATCH 2/3] perf build: Use FEATURE-INCLUDE in bpf subproject

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Message-ID: <20151126181204.GB19410@krava.brq.redhat.com>
Date:	Thu, 26 Nov 2015 19:12:04 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>, Wang Nan <wangnan0@...wei.com>,
	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 2/3] perf build: Use FEATURE-INCLUDE in bpf subproject

On Thu, Nov 26, 2015 at 01:31:30PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Thu, Nov 26, 2015 at 02:54:03PM +0100, Jiri Olsa escreveu:
> > Using FEATURE-INCLUDE in bpf subproject in case bpf is built
> > via perf. Keep the current features detection for other cases.
> > 
> > Cc: Wang Nan <wangnan0@...wei.com>
> > Link: http://lkml.kernel.org/n/tip-utuczk899ckz6qtggqvhm7yu@git.kernel.org
> > Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> 
> Clashes with:
> 
> d8ad6a15cc3a ("tools lib bpf: Don't do a feature check when cleaning")
> 
> That has, at that point:
> 
> +check_feat := 1
> +NON_CHECK_FEAT_TARGETS := clean TAGS tags cscope help
> +ifdef MAKECMDGOALS
> +ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),)
> +  check_feat := 0
> +endif
> +endif
> +
> +ifeq ($(check_feat),1)
>  include $(srctree)/tools/build/Makefile.feature
> +endif
> 
> On a related note:
> 
>   [acme@zoo linux]$ make O=/tmp/build/perf -C tools/perf
>   make: Entering directory '/home/git/linux/tools/perf'
>     BUILD:   Doing 'make -j4' parallel build
>   make[2]: Nothing to be done for 'fixdep'.
>   make: Leaving directory '/home/git/linux/tools/perf'
> 
> Can we get away with that "make[2]: Nothing to be done for 'fixdep'."
> line?

I'll check on that

jirka
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