SUSE-RU-2021:1291-1: moderate: Recommended update for mpfr

[sle-updates at lists.suse.com]

   SUSE Recommended Update: Recommended update for mpfr
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Announcement ID:    SUSE-RU-2021:1291-1
Rating:             moderate
References:         #1141190 
Affected Products:
                    SUSE Linux Enterprise Module for Basesystem 15-SP2
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   An update that has one recommended fix can now be installed.

Description:

   This update for mpfr fixes the following issues:

   - Fixed an issue when building for ppc64le (bsc#1141190)

   Technical library fixes:

   - A subtraction of two numbers of the same sign or addition of two numbers
     of different signs can be rounded incorrectly (and the ternary value can
     be incorrect) when one of the two inputs is reused as the output
     (destination) and all these MPFR numbers have exactly GMP_NUMB_BITS bits
     of precision (typically, 32 bits on 32-bit machines, 64 bits on 64-bit
     machines).
   - The mpfr_fma and mpfr_fms functions can behave incorrectly in case of
     internal overflow or underflow.
   - The result of the mpfr_sqr function can be rounded incorrectly in a rare
     case near underflow when the destination has exactly GMP_NUMB_BITS bits
     of precision (typically, 32 bits on 32-bit machines, 64 bits on 64-bit
     machines) and the input has at most GMP_NUMB_BITS bits
     of precision.
   - The behavior and documentation of the mpfr_get_str function are
     inconsistent concerning the minimum precision (this is related to the
     change of the minimum precision from 2 to 1 in MPFR 4.0.0). The get_str
     patch fixes this issue in the following way: the value 1 can now be
     provided for n (4th argument of mpfr_get_str); if n = 0, then the number
     of significant digits in the output string can now be 1, as already
     implied by the documentation (but the code was increasing it to 2).
   - The mpfr_cmp_q function can behave incorrectly when the rational (mpq_t)
     number has a null denominator.
   - The mpfr_inp_str and mpfr_out_str functions might behave incorrectly
     when the stream is a null pointer: the stream is replaced by stdin and
     stdout, respectively. This behavior is useless, not documented (thus
     incorrect in case a null pointer would have a special meaning), and not
     consistent with other input/output functions.


Patch Instructions:

   To install this SUSE Recommended Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Module for Basesystem 15-SP2:

      zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2021-1291=1



Package List:

   - SUSE Linux Enterprise Module for Basesystem 15-SP2 (aarch64 ppc64le s390x x86_64):

      libmpfr6-4.0.2-3.3.1
      libmpfr6-debuginfo-4.0.2-3.3.1
      mpfr-debugsource-4.0.2-3.3.1
      mpfr-devel-4.0.2-3.3.1


References:

   https://bugzilla.suse.com/1141190