GNU MPFR 4.2.1 Release Candidate

Vincent Lefevre vincent at
Fri Aug 18 21:30:21 CEST 2023

The release of GNU MPFR 4.2.1 ("fondue savoyarde", patch level 1)
is imminent.  Please help to make this release as good as possible
by downloading and testing this release candidate:

The SHA1 digests:
8ebaf639ef9fbf854b192eb9ab8c38b5c4d74071  mpfr-4.2.1-rc1.tar.bz2
d7a1fa595480a23ecc34a435098ff2681f0e33ad  mpfr-4.2.1-rc1.tar.gz
caa864b0dfad17e014d5c0d99900ec64ebbf2b22  mpfr-4.2.1-rc1.tar.xz

The SHA256 digests:
b0273645e443633074f13ff79ae91ea741575a98cf5c9c5c1c8f3a997be2e671  mpfr-4.2.1-rc1.tar.bz2
e4859180c86ec409b54941185732333a2ad34ead245379dcd453f31dba856717  mpfr-4.2.1-rc1.tar.gz
14f87f24a5434ecbe103b1104f93d260b08651dadc3c5c00c2421ee29dc37cda  mpfr-4.2.1-rc1.tar.xz

The signatures:

Each tarball is signed by Vincent Lefèvre. This can be verified using
the GPG key ID 5831D11A0D4DB02A; this key can be retrieved with:

  gpg --recv-keys 5831D11A0D4DB02A

or by downloading it from <>.
The key fingerprint is:

  A534 BE3F 83E2 41D9 1828  0AEB 5831 D11A 0D4D B02A

The signatures can be verified with: gpg --verify <file.asc>
You should check that the key fingerprint matches.

Changes from version 4.2.0 to version 4.2.1:
- Bug fixes (see <> and/or the
  ChangeLog file).
- Improved MPFR manual.
- Configure tests: replaced the test of the link with GMP, in order to
  avoid the use of a function without a prototype (Autoconf issue), as
  this is obsolescent in ISO C. The new test should be more robust.

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

If no problems are found, GNU MPFR 4.2.1 should be released on 2023-08-22.


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

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