On May 31, 2013, Olivier Hainque <hain...@adacore.com> wrote:

>  - revert to our former computations, based on target and
>    not target_alias. Revert the subsequent adjustments as
>    well.

*nod*

>  - Use target_alias explicitly just at the points where
>    we know that we need to depart from the canonical name

I suggest another approach: if there are significant differences between
the run-time systems, they ought to be preserved in the canonical target
names.  So, adjust config.sub so that it preserve them, and then we can
decide based on the canonical target name only.

-- 
Alexandre Oliva, freedom fighter    http://FSFLA.org/~lxoliva/
You must be the change you wish to see in the world. -- Gandhi
Be Free! -- http://FSFLA.org/   FSF Latin America board member
Free Software Evangelist      Red Hat Brazil Compiler Engineer

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