[configury patch] don't add 'mpfr' to --with-mpfr-dir

[Toon Moene]

Paul Brook wrote:

> If this turns out to get messy, or take significant amounts of effort to fix, 
> I suggest removing the uninstalled option and requiring installed libraries.
> Both gmp and mpfr support --prefix, so this can be done by non-root users.

Seconded.  I've done this on an old Red Hat box (7.3 IIRC).

-- 
Toon Moene - e-mail: toon@moene.indiv.nluug.nl - phone: +31 346 214290
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