= MPFR =

== Description ==

The MPFR library is a C library for multiple-precision floating-point
computations with correct rounding. MPFR has continuously been supported by
the INRIA and the current main authors come from the Caramba and AriC
project-teams at Loria (Nancy, France) and LIP (Lyon, France) respectively;
see more on the credit page. MPFR is based on the GMP multiple-precision
library.

The main goal of MPFR is to provide a library for multiple-precision
floating-point computation which is both efficient and has a well-defined
semantics. It copies the good ideas from the ANSI/IEEE-754 standard for
double-precision floating-point arithmetic (53-bit significand).

== License ==

MPFR is free. It is distributed under the GNU Lesser General Public License
(GNU Lesser GPL), version 3 or later (2.1 or later for MPFR versions until
2.4.x). The library has been registered in France by the Agence de Protection
des Programmes under the number IDDN FR 001 120020 00 R P 2000 000 10800, on
15 March 2000. This license guarantees your freedom to share and change MPFR,
to make sure MPFR is free for all its users. Unlike the ordinary General
Public License, the Lesser GPL enables developers of non-free programs to use
MPFR in their programs. If you have written a new function for MPFR or
improved an existing one, please share your work!

== Upstream Contact ==

The MPFR website is located at http://mpfr.org/

The MPFR team can be contacted via the MPFR mailing list: mpfr@loria.fr

== Dependencies ==

 * GMP/MPIR
 * GNU patch

== Special Update/Build Instructions ==

 * Make sure MPFR's settings of `CC` and `CFLAGS` still get properly extracted,
   currently from its `config.log` in the `src/` directory.
 * We should remove the `configure` option `--disable-thread-safe` in case
   the issues without that have meanwhile been fixed.  (Then we should
   actually pass `--enable-thread-safe`.)

== TODO ==

* --disable-thread-safe should be switched to --enable-thread-safe,
  need to check that this works on the buildbot machines
