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Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
Contributed by the Spaces project, INRIA Lorraine.

This file is part of the MPFR Library.

The MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version.

The MPFR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with the MPFR Library; see the file COPYING.LIB.  If not, write to
the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301, USA.

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Changes from version 2.2.0 to version 2.2.1:
- Many bug fixes: <http://mpfr.org/mpfr-2.2.0/#bugs>.
- Updated mpfr-longlong.h from the GMP 4.2 longlong.h file.
- Moved some internal declarations from mpfr.h to mpfr-impl.h.
- Use -search_paths_first on Darwin (Mac OS X) to fix linking behavior.
- Improved "make check": much more complete generic tests.
- Improved INSTALL file and MPFR manual.

Changes from versions 2.1.* to version 2.2.0:
- Bug fixes.
- new functions mpfr_set_overflow, mpfr_set_underflow, mpfr_set_inexflag,
  mpfr_set_erangeflag, mpfr_set_nanflag, mpfr_erfc, mpfr_atan2, mpfr_pow_z,
  mpfr_subnormalize, mpfr_const_catalan, mpfr_sec, mpfr_csc, mpfr_cot,
  mpfr_root, mpfr_eint, mpfr_get_f, mpfr_sech, mpfr_csch, mpfr_coth,
  mpfr_lngamma.
- new macro: MPFR_VERSION_STRING
- Remove the exported MPFR variables from mpfr.h to mpfr-impl.h.
  (They were undocumented, so programs which respect the API still work).
- Grep CC and CFLAGS from GMP Makefile if possible.
- Math functions are faster (both average and worst cases).
- Better support for long double.
- Shared library of MPFR.
- Binary compatible with previous versions if you do not use undocumented
  features.
- Thread safe (if built with --enable-thread-safe).
- Logging facility.
- Change in the semantics of mpfr_out_str/mpfr_get_str when n_digits=0.
- Better locale support.

Changes from version 2.1.0 to version 2.1.1:
- Better way to detect the GMP library.
- Bug fixes.

Changes from version 2.0.3 to version 2.1.0:
- Bug fixes.
- new functions mpfr_strtofr, mpfr_set_uj, mpfr_set_sj, mpfr_set_ui_2exp,
  mpfr_set_si_2exp, mpfr_set_sj_2exp, mpfr_set_uj_2exp, mpfr_get_uj,
  mpfr_get_sj, mpfr_get_z, mpfr_free_str, mpfr_si_sub, mpfr_sub_si,
  mpfr_mul_si, mpfr_si_div, mpfr_div_si, mpfr_sqr, mpfr_cmp_z, mpfr_cmp_q,
  mpfr_zero_p, mpfr_free_cache, mpfr_sum, mpfr_get_version,
  mpfr_get_default_rounding_mode, mpfr_get_emin_min, mpfr_get_emin_max,
  mpfr_get_emax_min, mpfr_get_emax_max, mpfr_inits, mpfr_inits2, mpfr_clears,
  mpfr_fits_intmax_p, mpfr_fits_uintmax_p, mpfr_clear_erangeflag,
  mpfr_erangeflag_p, mpfr_rint_round, mpfr_rint_trunc, mpfr_rint_ceil,
  mpfr_rint_floor.
- new macros MPFR_DECL_INIT, MPFR_VERSION, MPFR_VERSION_NUM,
  MPFR_VERSION_MAJOR, MPFR_VERSION_MINOR, MPFR_VERSION_PATCHLEVEL.
- improved documentation.
- improved configure.
- improved portability (library and test suite).
- It handles correctly non IEEE-754 double.
- GMP internal files are not needed to install MPFR.
- It is faster with low-precision floating point.
- New global flag: ERANGE_FLAG.
- Binary incompatible with previous versions, but API compatible.
- mpfr_set_str doesn't allow anymore "@NAN@garbagechar" and "@INF@garbagechar",
  allows base 0 (detection of the base), prefix (0x, 0b), leading whitespace.

Changes from version 2.0.2 to version 2.0.3:
- Bug fixes.
- Support GMP as a shared library (not fully tested).

Changes from version 2.0.1 to version 2.0.2:
- many bug fixes and other improvements.
- new functions mpfr_prec_round (replaces mpfr_round_prec), mpfr_get_exp,
  mpfr_set_exp, mpfr_get_ld, mpfr_set_ld, mpfr_get_d_2exp, mpfr_get_si,
  mpfr_get_ui, mpfr_nextabove, mpfr_nextbelow, mpfr_nexttoward, mpfr_frac,
  mpfr_fits_*, mpfr_cmp_d, mpfr_cmpabs, mpfr_erf, mpfr_gamma, mpfr_zeta,
  mpfr_greater_p, mpfr_greaterequal_p, mpfr_less_p, mpfr_lessequal_p,
  mpfr_lessgreater_p, mpfr_equal_p, mpfr_unordered_p.
- removed functions: mpfr_print_binary, mpfr_round_prec (replaced by
  mpfr_prec_round), mpfr_set_str_raw, mpfr_set_machine_rnd_mode.
- function mpfr_isinteger renamed mpfr_integer_p.
- return type of some functions changed from void to int, for consistency.
- return type of mpfr_set_prec changed from int to void.
- new values for exponent range.
- rename internal variables.

Changes from version 2001 to version 2.0.1:
- new mathematical functions: acos, acosh, asin, asinh, atan, atanh, cosh,
  base-2 exponential and logarithm, base-10 logarithm, expm1, factorial,
  pow, pow_si, pow_ui, sinh, tan, tanh, ui_pow, ui_pow_ui
- other new functions: mpfr_const_euler, mpfr_dim, mpfr_fma, mpfr_hypot,
  mpfr_min, mpfr_max, mpfr_rint, mpfr_set_inf, mpfr_set_nan
- new operations with MPZ or MPQ: mpfr_{add,sub,mul,div}_[zq]
- new predicates: mpfr_inf_p, mpfr_nan_p, mpfr_number_p, mpfr_isinteger,
- add mechanism to set/check exponent range (overflow, underflow), partially
  implemented in the mpfr functions.
- efficiency: mpfr_div is now faster when the divisor has a few limbs
- rounding: now mpfr_pow implements exact rounding, and most functions return a
  ternary value indicating the position of the returned value wrt the exact one
  (thus the return value is now 'int' instead of 'void')
- complete rewrite of the configuration files
- mpfr_get_d, mpfr_{add,sub}_one_ulp now get a rounding mode as 2nd argument
- some function names did change: mpz_set_fr is now mpfr_get_z_exp,
  mpfr_print_raw is now mpfr_print_binary.

Changes from version 1.0 to version 2001:
- the default installation does not provide any more access to machine
  rounding mode, and as a consequence does not compare MPFR results with
  precision=53 to machine results. Add option -DTEST if you want to have
  access to machine rounding mode, and to check MPFR results against.
- the MPFR files do not need <math.h> any more
- the header file <mpfr.h> was split into <mpfr.h> for exported functions
  and <mpfr-impl.h> for internal functions. The user should not use functions
  or macros from <mpfr-impl.h>, since those may change in further releases.
- <mpfr.h> was modified in order to make easy a C++ interface
- MPFR now deals with infinities (+infinity and -infinity) and NaN
- the missing function mpfr_swap is now available
- mpfr_zeta was removed (was incomplete)
- mpfr_init and mpfr_init2 now initialize the corresponding variable to 0
  (like in other initialization functions from GNU MP)
- in case memory allocation fails, an error message is output
- several bugs of version 1.0 were fixed

Changes from version 0.4 to version 1.0:

- Version 1.0 now uses a standard configure/make installation.
- Version 1.0 implements all functions that are available in the MPF class
  from GMP 3.1 (except mpf_swap) and a header file mpf2mpfr.h is included in
  the distribution for easy change from MPF to MPFR.
- Version 1.0 implements new elementary functions: mpfr_sincos
- Some functions and macros have been renamed: mpfr_log2 is now
  mpfr_const_log2, mpfr_pi is now mpfr_const_pi, SIGN is now MPFR_SIGN.
- Version 1.0 uses faster algorithms for mpfr_exp, mpfr_const_pi,
  mpfr_const_log2. Compare the timings from version 1.0 and version 0.4.
- Version 1.0 corrects some bugs of version 0.4.
- The precision of MPFR variables is now named mpfr_prec, which makes it
  easier to change it, to say unsigned long long. Same for the rounding mode
  which is called mp_rnd_t.

You'll find other news concerning the MPFR library on the web
page <http://www.mpfr.org/>.