linux-kernel - Re: [PATCH 3/9] perf build: Test correct path of perf in build-test

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Date:	Thu, 14 Jan 2016 10:57:13 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Wang Nan <wangnan0@...wei.com>
Cc:	acme@...nel.org, linux-kernel@...r.kernel.org, pi3orama@....com,
	lizefan@...wei.com, Arnaldo Carvalho de Melo <acme@...hat.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH 3/9] perf build: Test correct path of perf in build-test

On Wed, Jan 13, 2016 at 12:17:16PM +0000, Wang Nan wrote:

SNIP

> +test_make_python_perf_so := test -f $(PERF_OUT)/python/perf.so
>  
> -test_make_perf_o           := test -f $(PERF)/perf.o
> -test_make_util_map_o       := test -f $(PERF)/util/map.o
> -test_make_util_pmu_bison_o := test -f $(PERF)/util/pmu-bison.o
> +test_make_perf_o           := test -f $(PERF_OUT)/perf.o
> +test_make_util_map_o       := test -f $(PERF_OUT)/util/map.o
> +test_make_util_pmu_bison_o := test -f $(PERF_OUT)/util/pmu-bison.o
>  
>  define test_dest_files
>    for file in $(1); do				\
> @@ -244,7 +246,7 @@ test_make_perf_o_O            := test -f $$TMP_O/perf.o
>  test_make_util_map_o_O        := test -f $$TMP_O/util/map.o
>  test_make_util_pmu_bison_o_O := test -f $$TMP_O/util/pmu-bison.o
>  
> -test_default = test -x $(PERF)/perf
> +test_default = test -x $(PERF_OUT)/perf
>  test = $(if $(test_$1),$(test_$1),$(test_default))
>  
>  test_default_O = test -x $$TMP_O/perf
> @@ -264,7 +266,7 @@ endif
>  
>  MAKEFLAGS := --no-print-directory
>  
> -clean := @(cd $(PERF); make -s -f $(MK) clean >/dev/null)
> +clean := @(cd $(PERF); make -s -f $(MK) O=$(PERF_OUT) clean >/dev/null; make -s -f $(MK) clean >/dev/null)

what's the second make clean for?

thanks,
jirka