linux-kernel - Re: [PATCH] lib/vdso: use "grep -E" instead of "egrep"

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Date:   Wed, 21 Sep 2022 10:44:48 +0100
From:   Vincenzo Frascino <vincenzo.frascino@....com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc:     Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] lib/vdso: use "grep -E" instead of "egrep"

On 9/20/22 18:06, Greg Kroah-Hartman wrote:
> The latest version of grep claims the egrep is now obsolete so the build
> now contains warnings that look like:
> 	egrep: warning: egrep is obsolescent; using grep -E
> fix this up by moving the vdso Makefile to use "grep -E" instead.
> 
> Cc: Andy Lutomirski <luto@...nel.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Vincenzo Frascino <vincenzo.frascino@....com>

Reviewed-by: Vincenzo Frascino <vincenzo.frascino@....com>

> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
>  lib/vdso/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/vdso/Makefile b/lib/vdso/Makefile
> index c415a685d61b..e814061d6aa0 100644
> --- a/lib/vdso/Makefile
> +++ b/lib/vdso/Makefile
> @@ -17,6 +17,6 @@ $(error ARCH_REL_TYPE_ABS is not set)
>  endif
>  
>  quiet_cmd_vdso_check = VDSOCHK $@
> -      cmd_vdso_check = if $(OBJDUMP) -R $@ | egrep -h "$(ARCH_REL_TYPE_ABS)"; \
> +      cmd_vdso_check = if $(OBJDUMP) -R $@ | grep -E -h "$(ARCH_REL_TYPE_ABS)"; \
>  		       then (echo >&2 "$@: dynamic relocations are not supported"; \
>  			     rm -f $@; /bin/false); fi

-- 
Regards,
Vincenzo