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From: Mike Frysinger <vapier@gentoo.org>
Organization: wh0rd.org
To: =?utf-8?q?Micha=C5=82_G=C3=B3rny?= <mgorny@gentoo.org>
Subject: [gentoo-dev] Re: [PATCH multilib.eclass] Distinguish between unset and empty variables when restoring.
Date: Sat, 20 Apr 2013 02:10:20 -0400
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On Saturday 20 April 2013 01:12:20 Micha=C5=82 G=C3=B3rny wrote:
>  		for v in CHOST CBUILD AS CC CXX LD PKG_CONFIG_{LIBDIR,PATH} ; do
>  			vv=3D"__abi_saved_${v}"
> -			export ${v}=3D"${!vv}"
> +			unset ${v}
> +			[[ ${!vv+1} ]] && export ${v}=3D"${!vv}"
>  			unset ${vv}

merge the two unset commands.  no need to run it twice.
=2Dmike

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