builtins.c compile errors

[Brian Dessent]

Bob Walters wrote:

> Any ideas where the particular mpfr_XX functions are supposed to be
> defined?
> Is there something that needs to be regenerated?

They're defined in mpfr, which you need to upgrade.  The minimum
required version was recently bumped to 2.3.0 (2.3.2 preferred) on the
trunk, part of which included removing the #ifdefs that previously
guarded use of features added in 2.3.0, so using an older version is no
longer possible.

Brian