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List:       gentoo-dev
Subject:    Re: [gentoo-dev] RFC: method of checking for cross compilation from ebuild functions
From:       Zac Medico <zmedico () gentoo ! org>
Date:       2012-09-22 17:01:42
Message-ID: 505DEEF6.3050307 () gentoo ! org
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On 09/22/2012 09:48 AM, Ambroz Bizjak wrote:
> Zac, I think you misunderstood me here. Crosscompile-only HDEPEND is
> definitely necessary, I've seen many packages need this. But what I'm
> suggesting is that we also, and maybe only, need "ROOT != /" - only
> HDEPEND dependencies. This means that the dependency would only be
> required if the package is being built for a ROOT that is not /. The
> idea is to eliminate the strange case that is ROOT!=/ but FEATURES has
> no crosscompile. If the package requires tools that it would build
> itself if ROOT was /, it will use the host's version of the tool
> whenever ROOT!=/  It wouldn't have to worry about whether the tools it
> builds link to libraries in ROOT.
> 
> So my proposal is basically, instead of:
> HDEPEND="crosscompile? ( ~${CATEGORY}/${P} )    (yes, that seems to be
> the most common case)
> 
> there would also, and maybe only, be:
> HDEPEND="root_not_slash? ( ~${CATEGORY}/${P} )"
> 
> root_not_slash (or another name) would essentially be a superset of
> crosscompile, since crosscompile implies ROOT!=/.

Maybe call it "sysroot" instead of root_not_slash, since gcc and other
tools seem to refer to it as sysroot.
-- 
Thanks,
Zac

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