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Re: x86_64 and x86 userland

From: Jacob Meuser
Subject: Re: x86_64 and x86 userland
Date: Mon, 2 May 2005 22:38:53 -0700
User-agent: Mutt/1.4.2i

On Mon, May 02, 2005 at 10:31:57AM +0200, Ralf Wildenhues wrote:
> I have a question regarding systems with more than one ABI, specifically
> x86_64.  If you consider for example the Debian distribution which has a
> x86_64 kernel, but a completely x86 userland, config.guess still gives
> you x86_64-unknown-linux-gnu as output.  (I have been told this, but not
> tried it myself).
> Now, if you configure a package and forget to add
>   --build=i686-pc-linux-gnu
> or maybe use the setarch tool to set personality (I do not even know how
> portable/available this is -- it exists in RedHat Fedora), it may break,
> e.g. because of the __x86_64__ preprocessor define.
> Would it not make more sense to have config.guess return i686 instead of
> x86_64?  Is it just too late to make that change now?  How would it even
> be possible to detect a completely 32bit userland?
> Should I rather ask this on the config-patches list or elsewhere?

could a that comes with such distributions be used to
handle this?


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