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GNU Guile 2.2.4 released

From: Ludovic Courtès
Subject: GNU Guile 2.2.4 released
Date: Mon, 02 Jul 2018 10:43:49 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)

We are delighted to announce GNU Guile release 2.2.4, the fourth bug-fix
release in the 2.2 stable release series.  See the NEWS excerpt that
follows for full details.

                             *  *  *

Guile is an implementation of the Scheme programming language.

The Guile web page is located at, and
among other things, it contains a copy of the Guile manual and pointers
to more resources.

Guile can run interactively, as a script interpreter, and as a Scheme
compiler to VM bytecode.  It is also packaged as a library so that
applications can easily incorporate a complete Scheme interpreter/VM.
An application can use Guile as an extension language, a clean and
powerful configuration language, or as multi-purpose "glue" to connect
primitives provided by the application.  It is easy to call Scheme code
from C code and vice versa.  Applications can add new functions, data
types, control structures, and even syntax to Guile, to create a
domain-specific language tailored to the task at hand.

Guile implements many common Scheme standards, including R5RS, R6RS, and
a number of SRFIs.  In addition, Guile includes its own module system,
full access to POSIX system calls, networking support, multiple threads,
dynamic linking, a foreign function call interface, and powerful string

Guile 2.2.4 can be installed in parallel with Guile 2.0.x; see

                             *  *  *

Changes in 2.2.4 (since 2.2.3):

* New interfaces and functionality

** SRFI-71 (Extended LET-syntax for multiple values)

Guile now includes SRFI-71, which extends let, let*, and letrec to
support assigning multiple values.  See "SRFI-71" in the manual for

** (web client) export 'http-request' procedure

The 'http-request' procedure is the generalized procedure underneath
'http-get', 'http-post', etc.

** GDB support now registers the 'guile-backtrace' GDB command

The 'guile-backtrace' GDB command displays a backtrace of the VM stack
for the current thread.

** Recognize RISC-V compilation targets in (system base target)

* Bug fixes

** Fix stack-marking bug affecting multi-threaded programs

** Add missing SYNC_IP calls in the VM

These could cause multi-threaded code to crash.

** Fix multi-threaded access to modules
   (<>, <>,
    and <>)

** (ice-9 match) now has better documentation

** 'get-bytevector-n' and 'get-bytevector-n!' can now read more than 4 GB

** Fix cross-compilation support for elisp

** Fix error reporting in 'load-thunk-from-memory'

** Fix GOOPS 'instance?' to work on objects that aren't structs

** Fix type inference for bitwise logical operators

** Avoid inexact arithmetic in the type inferrer for 'sqrt'

** Fix floating point unboxing regression in 2.2.3

** Fix eta-conversion edge cases in peval (<>)

** Correctly interpret SRFI-18 timeout parameters

** 'select' returns empty sets upon EINTR and EAGAIN

** Restore pre-2.2.3 '%fresh-auto-compile' behavior

This reverts an incorrect fix for <>.

                             *  *  *

Here are the compressed sources:   (18MB)   (9MB)   (11MB)

Here are the GPG detached signatures[*]:

Use a mirror for higher download bandwidth:

Here are the SHA256 checksums:


[*] Use a .sig file to verify that the corresponding file (without the
.sig suffix) is intact.  First, be sure to download both the .sig file
and the corresponding tarball.  Then, run a command like this:

  gpg --verify guile-2.2.4.tar.gz.sig

If that command fails because you don't have the required public key,
then run this command to import it:

  gpg --keyserver --recv-keys 

and rerun the 'gpg --verify' command.

This release was bootstrapped with the following tools:
  Autoconf 2.69
  Automake 1.16.1
  Libtool 2.4.6
  Makeinfo 6.5
  Gnulib v0.1-1157-gb03f418

Thanks to Arun Isaac, Christopher Lemmer Webber, Jan Smydke, and
Shea Levy who all contributed to this release.

Happy hacking with Guile,

Andy Wingo, Ludovic Courtès, and Mark H Weaver.

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