linux-kernel - RE: [PATCH 2/8] selftests: lib.mk: define CLEAN macro to allow Makefiles to override clean

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Date:   Mon, 24 Apr 2017 15:45:26 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Shuah Khan' <shuahkh@....samsung.com>,
        "shuah@...nel.org" <shuah@...nel.org>,
        "bamvor.zhangjian@...aro.org" <bamvor.zhangjian@...aro.org>,
        "benh@...nel.crashing.org" <benh@...nel.crashing.org>,
        "paulus@...ba.org" <paulus@...ba.org>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "dvhart@...radead.org" <dvhart@...radead.org>
CC:     "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "rkrcmar@...hat.com" <rkrcmar@...hat.com>,
        "dsafonov@...tuozzo.com" <dsafonov@...tuozzo.com>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "emilio.lopez@...labora.co.uk" <emilio.lopez@...labora.co.uk>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
        "luto@...nel.org" <luto@...nel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "mingo@...nel.org" <mingo@...nel.org>
Subject: RE: [PATCH 2/8] selftests: lib.mk: define CLEAN macro to allow
 Makefiles to override clean

From: Shuah Khan
> Sent: 22 April 2017 00:15
> Define CLEAN macro to allow Makefiles to override common clean target
> in lib.mk. This will help fix the following failures:
> 
> warning: overriding recipe for target 'clean'
> ../lib.mk:55: warning: ignoring old recipe for target 'clean'
> 
> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
> ---
>  tools/testing/selftests/lib.mk | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index 775c589..959273c 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -51,8 +51,12 @@ endef
>  emit_tests:
>  	$(EMIT_TESTS)
> 
> -clean:
> +define CLEAN
>  	$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
> +endef
> +
> +clean:
> +	$(CLEAN)

If might be easier to do something like:

ifneq($(NO_CLEAN),y)
clean:
	$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
endif

	David