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File Release Notes and Changelog

Release Name: 3.1.0

Change Log
Changes from versions 3.0.* to version 3.1.0:
- The "canard à l'orange" release.
- 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,
  cf http://gmplib.org/list-archives/gmp-devel/2010-September/001642.html).
- 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_gmpinternals_p, mpfr_buildopt_tune_case,
  mpfr_frexp, mpfr_grandom and mpfr_z_sub.
- New divide-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).
- Internal change: the logging mechanism has been improved.
- 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.