linux-kernel - Re: [PATCH 4/8] selftests: gpio: override clean in lib.mk to fix warnings

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Date:   Sat, 22 Apr 2017 15:40:04 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Shuah Khan <shuahkh@....samsung.com>, shuah@...nel.org,
        bamvor.zhangjian@...aro.org, benh@...nel.crashing.org,
        paulus@...ba.org, dvhart@...radead.org
Cc:     Shuah Khan <shuahkh@....samsung.com>, viro@...iv.linux.org.uk,
        emilio.lopez@...labora.co.uk, mingo@...nel.org, luto@...nel.org,
        dave.hansen@...ux.intel.com, dsafonov@...tuozzo.com,
        rkrcmar@...hat.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 4/8] selftests: gpio: override clean in lib.mk to fix warnings

Shuah Khan <shuahkh@....samsung.com> writes:

> Add override for lib.mk clean to fix the following warnings from clean
> target run.
>
> Makefile:11: 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/gpio/Makefile | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile
> index 205e4d1..4f6d9e0 100644
> --- a/tools/testing/selftests/gpio/Makefile
> +++ b/tools/testing/selftests/gpio/Makefile
> @@ -7,8 +7,9 @@ include ../lib.mk
>  
>  all: $(BINARIES)
>  
> -clean:
> +override define CLEAN
>  	$(RM) $(BINARIES)
> +endef

This could be achieved more simply with:

EXTRA_CLEAN := $(BINARIES)

cheers