linux-kernel - Re: [PATCH 1/6] kbuild: record needed exported symbols for modules

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Date:	Mon, 8 Feb 2016 23:12:57 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Nicolas Pitre <nicolas.pitre@...aro.org>
Cc:	Michal Marek <mmarek@...e.com>, linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org, Al Viro <viro@...IV.linux.org.uk>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH 1/6] kbuild: record needed exported symbols for modules

>  
> +# List module undefined symbols
> +ifdef CONFIG_TRIM_UNUSED_EXPSYMS
> +cmd_undef_syms = $(NM) $@ | sed -n 's/^ \+U \(.*\)/\1/p' | xargs echo
> +else
> +cmd_undef_syms = echo
> +endif
Use ":" as a "do nothing" cammand. Then you do not emit an empty line.

	Sam