GNU Guile 2.0.1 released

GNU Guile 2.0.1 released

[Ludovic Courtès]

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We are pleased to announce GNU Guile release 2.0.1, the next maintenance
release for the 2.0.x stable series.

The Guile web page is located at http://gnu.org/software/guile/, and
among other things, it contains a link to the Guile FAQ and pointers to
the mailing lists.

Guile is an implementation of the Scheme programming language, with
support for many SRFIs, packaged for use in a wide variety of
environments.  In addition to implementing the R5RS Scheme standard and
a large subset of R6RS, Guile includes a module system, full access to
POSIX system calls, networking support, multiple threads, dynamic
linking, a foreign function call interface, and powerful string
processing.

Guile can run interactively, as a script interpreter, and as a Scheme
compiler to VM bytecode suitable for stand-alone applications.  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.


Here are the compressed sources:
  ftp://ftp.gnu.org/gnu/guile/guile-2.0.1.tar.gz   (6.4MB)

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  ftp://ftp.gnu.org/gnu/guile/guile-2.0.1.tar.gz.sig

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Here are the MD5 and SHA1 checksums:

b68f66fbdcbf65036ce4af5f915000f5  guile-2.0.1.tar.gz
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This release was bootstrapped with the following tools:
  Autoconf 2.68
  Automake 1.11.1
  Libtool 2.4
  Gnulib v0.0-5158-g7d06b32


This release contains many bug fixes along with some new features.
Here are the highlights, taken from the `NEWS' file:

  Changes in 2.0.1 (since 2.0.0):

  * Notable changes

  ** guile.m4 supports linking with rpath

  The GUILE_FLAGS macro now sets GUILE_LIBS and GUILE_LTLIBS, which
  include appropriate directives to the linker to include libguile-2.0.so
  in the runtime library lookup path.

  ** `begin' expands macros in its body before other expressions

  This enables support for programs like the following:

      (begin
        (define even?
          (lambda (x)
            (or (= x 0) (odd? (- x 1)))))
        (define-syntax odd?
          (syntax-rules ()
            ((odd? x) (not (even? x)))))
        (even? 10))

  ** REPL reader usability enhancements

  The REPL now flushes input after a read error, which should prevent one
  error from causing other errors.  The REPL also now interprets comments
  as whitespace.

  ** REPL output has configurable width

  The REPL now defaults to output with the current terminal's width, in
  columns.  See "Debug Commands" in the manual for more information on
  the ,width command.

  ** Better C access to the module system

  Guile now has convenient C accessors to look up variables or values in
  modules and their public interfaces.  See `scm_c_public_ref' and friends
  in "Accessing Modules from C" in the manual.

  ** Added `scm_call_5', `scm_call_6'

  See "Fly Evaluation" in the manual.

  ** Added `scm_from_latin1_keyword', `scm_from_utf8_keyword'

  See "Keyword Procedures" in the manual, for more.  Note that
  `scm_from_locale_keyword' should not be used when the name is a C string
  constant.

  ** R6RS unicode and string I/O work

  Added efficient implementations of `get-string-n' and `get-string-n!'
  for binary ports.  Exported `current-input-port', `current-output-port'
  and `current-error-port' from `(rnrs io ports)', and enhanced support
  for transcoders.

  ** Added `pointer->scm', `scm->pointer' to `(system foreign)'

  These procedure are useful if one needs to pass and receive SCM values
  to and from foreign functions.  See "Foreign Variables" in the manual,
  for more.

  ** Added `heap-allocated-since-gc' to `(gc-stats)'

  Also fixed the long-standing bug in the REPL `,stat' command.

  ** Add `on-error' REPL option

  This option controls what happens when an error occurs at the REPL, and
  defaults to `debug', indicating that Guile should enter the debugger.
  Other values include `report', which will simply print a backtrace
  without entering the debugger.  See "System Commands" in the manual.

  ** Enforce immutability of string literals

  Attempting to mutate a string literal now causes a runtime error.

  ** Fix pthread redirection

  Guile 2.0.0 shipped with headers that, if configured with pthread
  support, would re-define `pthread_create', `pthread_join', and other API
  to redirect to the BDW-GC wrappers, `GC_pthread_create', etc.  This was
  unintended, and not necessary: because threads must enter Guile with
  `scm_with_guile', Guile can handle thread registration itself, without
  needing to make the GC aware of all threads.  This oversight has been
  fixed.

  ** `with-continuation-barrier' now unwinds on `quit'

  A throw to `quit' in a continuation barrier will cause Guile to exit.
  Before, it would do so before unwinding to the barrier, which would
  prevent cleanup handlers from running.  This has been fixed so that it
  exits only after unwinding.

  ** `string->pointer' and `pointer->string' have optional encoding arg

  This allows users of the FFI to more easily deal in strings with
  particular (non-locale) encodings, like "utf-8".  See "Void Pointers and
  Byte Access" in the manual, for more.

  ** R6RS fixnum arithmetic optimizations

  R6RS fixnum operations are are still slower than generic arithmetic,
  however.

  ** New procedure: `define-inlinable'

  See "Inlinable Procedures" in the manual, for more.

  ** New procedure: `exact-integer-sqrt'

  See "Integer Operations" in the manual, for more.

  ** "Extended read syntax" for symbols parses better

  In #{foo}# symbols, backslashes are now treated as escapes, as the
  symbol-printing code intended.  Additionally, "\x" within #{foo}# is now
  interpreted as starting an R6RS hex escape.  This is backward compatible
  because the symbol printer would never produce a "\x" before.  The
  printer also works better too.

  ** Added `--fresh-auto-compile' option

  This allows a user to invalidate the auto-compilation cache.  It's
  usually not needed.  See "Compilation" in the manual, for a discussion.

  * Manual updates

  ** GOOPS documentation updates

  ** New man page

  Thanks to Mark Harig for improvements to guile.1.

  ** SRFI-23 documented

  The humble `error' SRFI now has an entry in the manual.

  * New modules

  ** `(ice-9 binary-ports)': "R6RS I/O Ports", in the manual
  ** `(ice-9 eval-string)': "Fly Evaluation", in the manual
  ** `(ice-9 command-line)', not documented yet

  * Bugs fixed

  ** Fixed `iconv_t' memory leak on close-port
  ** Fixed some leaks with weak hash tables
  ** Export `vhash-delq' and `vhash-delv' from `(ice-9 vlist)'
  ** `after-gc-hook' works again
  ** `define-record-type' now allowed in nested contexts
  ** `exact-integer-sqrt' now handles large integers correctly
  ** Fixed C extension examples in manual
  ** `vhash-delete' honors HASH argument
  ** Make `locale-digit-grouping' more robust
  ** Default exception printer robustness fixes
  ** Fix presence of non-I CPPFLAGS in `guile-2.0.pc'
  ** `read' updates line/column numbers when reading SCSH block comments
  ** Fix imports of multiple custom interfaces of same module
  ** Fix encoding scanning for non-seekable ports
  ** Fix `setter' when called with a non-setter generic
  ** Fix f32 and f64 bytevectors to not accept rationals
  ** Fix description of the R6RS `finite?' in manual
  ** Quotient, remainder and modulo accept inexact integers again
  ** Fix `continue' within `while' to take zero arguments
  ** Fix alignment for structures in FFI
  ** Fix port-filename of stdin, stdout, stderr to match the docs
  ** Fix weak hash table-related bug in `define-wrapped-pointer-type'
  ** Fix partial continuation application with pending procedure calls
  ** scm_{to,from}_locale_string use current locale, not current ports
  ** Fix thread cleanup, by using a pthread_key destructor
  ** Fix `quit' at the REPL
  ** Fix a failure to sync regs in vm bytevector ops
  ** Fix (texinfo reflection) to handle nested structures like syntax patterns
  ** Fix stexi->html double translation
  ** Fix tree-il->scheme fix for <prompt>
  ** Fix compilation of <prompt> in <fix> in single-value context
  ** Fix race condition in ensure-writable-dir
  ** Fix error message on ,disassemble "non-procedure"
  ** Fix prompt and abort with the boot evaluator
  ** Fix `procedure->pointer' for functions returning `void'
  ** Fix error reporting in dynamic-pointer
  ** Fix problems detecting coding: in block comments
  ** Fix duplicate load-path and load-compiled-path in compilation environment
  ** Add fallback read(2) suppport for .go files if mmap(2) unavailable
  ** Fix c32vector-set!, c64vector-set!
  ** Fix mistakenly deprecated read syntax for uniform complex vectors
  ** Fix parsing of exact numbers with negative exponents
  ** Ignore SIGPIPE in (system repl server)
  ** Fix optional second arg to R6RS log function
  ** Fix R6RS `assert' to return true value.
  ** Fix fencepost error when seeking in bytevector input ports
  ** Gracefully handle `setlocale' errors when starting the REPL
  ** Improve support of the `--disable-posix' configure option
  ** Make sure R6RS binary ports pass `binary-port?' regardless of the locale
  ** Gracefully handle unterminated UTF-8 sequences instead of hitting an `assert'


You can follow Guile development in the Git repository and on the Guile
mailing lists.  Guile builds from the `master' branch of Git have
version number 2.1.x.

Guile versions with an odd middle number, e.g., 2.1.*, are unstable
development versions.  Even middle numbers indicate stable versions.
This has been the case since the 1.3.* series.

Please report bugs to `bug-guile@gnu.org'.  We also welcome reports of
successful builds, which can be sent to the same email address.


Ludovic Courtès, on behalf of the Guile team.

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