GNU MPFR 3.1.0 Release Candidate

Vincent Lefevre vincent at
Sun Sep 18 01:46:11 CEST 2011

The release of GNU MPFR 3.1.0 ("canard à l'orange") is imminent.
Please help to make this major release as good as possible by
downloading and testing this release candidate:

The MD5's:
b8db8526722c6b51066fc318c5acf420  mpfr-3.1.0-rc1.tar.bz2
0b2a3492e968f720739e657c35b56e58  mpfr-3.1.0-rc1.tar.gz
264ffcfa3c8f07e5f847db02d33b9320  mpfr-3.1.0-rc1.tar.xz

The SHA1's:
70a3ee399d3d866740acdc1981658eb6a103ea05  mpfr-3.1.0-rc1.tar.bz2
9e708d77858b66d72e9f34087903064fff42e9b5  mpfr-3.1.0-rc1.tar.gz
542fb7e84256880fa826be45e45994731766ba43  mpfr-3.1.0-rc1.tar.xz

The signatures:

Changes from versions 3.0.* to version 3.1.0:
- The MPFR source has been reorganized.
- Dropped ansi2knr support.
- TLS support is now detected automatically. If TLS is supported, MPFR is
  built as thread safe by default. To disable TLS explicitly, configure
  MPFR with --disable-thread-safe.
- New --enable-gmp-internals configure option to use GMP's undocumented
  functions (not from the public API). Note that library versioning is
  not guaranteed to work if this option is used.
- The mpfr_urandom and mpfr_urandomb functions now return identical values
  on processors with different word size (assuming the same random seed, and
  since the GMP random generator does not depend itself on the word size,
- The mpfr_add_one_ulp and mpfr_sub_one_ulp macros (which are obsolete and
  no more documented) will be removed in a future release.
- Speed improvement for the mpfr_sqr and mpfr_div functions using Mulders'
  algorithm. As a consequence, other functions using those routines are
  also faster.
- Much faster formatted output (mpfr_printf, etc.) with %Rg and similar.
- The --with-gmp-build configure option can now be used when the GMP
  source directory and the GMP build directory are different (without
  having to copy header files manually as before).
- New functions mpfr_buildopt_tune_case, mpfr_frexp, mpfr_grandom and
- New division-by-zero exception (flag) and associated functions.
- The mpfr.h header can be included several times, while still supporting
  optional functions (see Section "Headers and Libraries" in the manual).
- Updated tuning parameters.
- Improved MPFR manual.
- MPFR tests: libtool no longer generates wrapper scripts with "make check"
  (so that running the tests under valgrind or gdb is easier).
- Bug fixes.
  Note: The mpfr_subnormalize implementation up to MPFR 3.0.0 did not change
  the flags. In particular, it did not follow the generic rule concerning
  the inexact flag (and no special behavior was specified). The case of the
  underflow flag was more a lack of specification.

Please send success and failure reports with "./config.guess" output
to <mpfr at>.

If no problems are found, GNU MPFR 3.1.0 should be released
around 2011-09-30.


Vincent Lefèvre <vincent at> - Web: <>
100% accessible validated (X)HTML - Blog: <>
Work: CR INRIA - computer arithmetic / Arénaire project (LIP, ENS-Lyon)

More information about the gmp-discuss mailing list