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Freshmeat entry
 News

For the latest and most up-to-date news, also look at CMUCL Trac Wiki.

20c released
CMUCL 20c has been released, For information on the changes between 20c and 20b, we refer the reader to the 20c release notes. Because of the release, there will not be a 2011-11 snapshot. .
Snapshot 2011-10
The 2011-10 snapshot has been released. See the release notes for details, but here is a quick summary of the changes between the this snapshot and the previous snapshot.
  • Command-line flags -read-only-space-size, -static-space-size, -control-stack-size, and -binding-stack-size have been addded to control the size of the corresponding region. The default size of each is unchanged.
  • Add -O option to build.sh.
  • The format of the file-comments has changed somewhat. The Header keyword is retained, but the git short SHA1 hash is used for the revision.
2011-09-20
The CMUCL CVS repository has been converted to git and is now available. You can browse the repository using the Browse Source, or you can visit CMUCL gitweb for a different view. This page also includes links necessary for cloning the repository. (For commiters, be sure to put your userid in the ssh link.) The CVS repository will still be available, but will not allow checkins anymore. Git is integrated with Trac so the commit messages can refer to and even close Trac tickets. If the commit messages contains text like 
        command #1
    	command #1, #2
    	command #1 & #2
    	command #1 and #2
then the given command is applied to the specified tickets. Instead of the short-hand syntax above, you can also use 
        command ticket:1
    	command ticket:1, ticket:2
    	command ticket:1 & ticket:2
    	command ticket:1 and ticket:2
The available commands (not case-sensitive) are:
close, closed, closes, fix, fixed, fixes
The specified issue numbers are closed with the contents of this commit message being added to it.
references, refs, addresses, re, see
The specified issue numbers are left in their current status, but the contents of this commit message are added to their notes.
Snapshot 2011-09
The 2011-09 snapshot has been released. See the release notes for details, but here is a quick summary of the changes between the this snapshot and the previous snapshot.
  • ASDF2 updated to version 2.017.
  • Improve type propagation for LOAD-TIME-VALUE.
  • Getting documentation of a structure via DOCUMENTATION no longer signals an error.
  • Reduce unnecessary consing of SAPs in ROOM.
  • Make stack overflow checking actually work on Mac OS X. The implementation had the :STACK-CHECKING feature, but it didn't actually prevent stack overflows from crashing lisp.
  • Fix rounding of numbers larger than a fixnum.
Snapshot 2011-08
There was no snapshot for this month.
Snapshot 2011-07
The 2011-07 snapshot has been released. See the release notes for details, but here is a quick summary of the changes between the this snapshot and the previous snapshot.
  • Unicode database updated to Unicode 6.0.0.
  • ASDF2 updated to version 2.016.1
  • Add LISP:LOAD-ALL-UNICODE-DATA to load all the unicode information into core. This is useful for creating an executable image that does not need unidata.bin.
  • CMUCL no longer exits if you specify a core file with an executable image. A warning is printed instead and the core file is used.
  • Trac #43 has been fixed in a better way. The previous fix was incorrect and causes some Unicode tests to fail.
Snapshot 2011-06
The 2011-06 snapshot has been released. See the release notes for details, but here is a quick summary of the changes between the this snapshot and the previous snapshot.
  • :CMUCL is now in *FEATURES*
  • Added command line option, -unidata, to allow user to specify the location and name of the unidata.bin file. This is used instead of the default location.
  • Opening a file whose name contains "[" with :IF-EXISTS :NEW-VERSION no longer causes an error.
Snapshot 2011-05
There was no snapshot in May, partly due to the ongoing upgrade on common-lisp.net.
Snapshot 2011-04
The 2011-04 snapshot has been released. See the release notes for details, but here is a quick summary of the changes between the this snapshot and the previous snapshot.
  • In COMPILE-FILE, the second return value is now non-nil if there are style warnings. Previously, style warnings were erroneously ignored.
  • ASDF has been updated to version 2.014.1
Snapshot 2011-03
The 2011-02 snapshot has been released. See the release notes for details, but here is a quick summary of the changes between the this snapshot and the previous snapshot.
  • In COMPILE-FILE, the :OUTPUT-FILE can also be a stream. CMUCL was erroneously signaling an error..
  • (OPEN f :DIRECTION :IO :IF-DOES-NOT-EXIST NIL) no longer signals an error if the file f does not exist. It returns NIL now.
  • In some situations the compiler could not constant fold SQRT calls because KERNEL:%SQRT was not defined on x86 with SSE2. This is fixed now.
  • In an earlier snapshot to add support for character name completion with SLIME, a bug was introduced where cmucl could no longer read #\latin_small_letter_a. This is fixed in this version.
Snapshot 2011-02
The 2011-02 snapshot has been released. See the release notes for details, but here is a quick summary of the changes between the this snapshot and the previous snapshot.
  • EXT::DESCRIBE-EXTERNAL-FORMAT was not exported.
  • TRACE was erroneously allowing encapsulation when tracing local flet/labels functions. This doesn't actually trace anything. An error is now signaled in this case. If you are sure, you can specify :ENCAPSULATE NIL to disable encapsulation.
Snapshot 2011-01
The 2011-01 snapshot has been released. See the release notes for details, but here is a quick summary of the changes between the this snapshot and the previous snapshot.
  • Initial support for Solaris/x86. CMUCL will run on Solaris/x86 with all features available.
  • UNINTERN no longer removes the wrong symbol. UNINTERN would remove the symbol when inherited from another package although it should not.
  • DEFSTRUCT allows multiple keyword constructors as required by the spec..
  • SUBSEQ with an end index less than the start index sometimes crashes CMUCL. Now, signal an error if the boudns are not valid.
  • Localization support was causing many calls to stat trying to find non-existent translation files. This has been fixed so that the results are cached. (If new translations are added, the cache will need to be cleared or cmucl restarted.) This change cuts building time by half on Solaris/sparc.
  • On NetBSD, function-end breakpoints, especially for tail-recursive functions, are working now.
  • On NetBSD, display of FP numbers (sse2 and x87) during tracing has been corrected. Previously, random values were displayed.
  • Executables images can now be created on NetBSD again.
Snapshot 2010-12
Some of the important changes are listed below. See the release notes for more details.
  • ASDF2 updated to version 2.010.
  • On x86, REALPART and IMAGPART no longer incorrectly returns 0 instead of the correct part of a complex number in some situations.
  • The command line parser now correctly handles the case where "--" is the first command option.
  • build.sh was accidenally loading the site-init file, but it shouldn't.
  • On sparc, the vops to add a float to a complex were broken, resulting in a complex number with the float as realpart and garbage for the imaginary part. This is now fixed.
  • XLIB::GET-BEST-AUTHORIZATION will now return authorization data if the protocol is :local, if the xauth file contains just "localhost/unix:0". Previously, no authorization data was returned because GET-BEST-AUTHORIZATION was looking for the hostname.
  • FORMAT signals an warning if ~:; is used inside ~:[.
  • SET-SYSTEM-EXTERNAL-FORMAT was not actually setting the filename encoding if given.
20b patch 000
A critical bug in REALPART and IMAGPART has been fixed in the 2010-11 snapshot. A patch is provided now to fix this issue in the 20b release. Installation instructions are available.
2010-11 snapshot
Some of the important changes are listed below. See the release notes for more details.
  • Update to Unicode 5.2.0.
  • Support for character name completion for use with Slime.
  • COMPILE-FILE accepts a :DECODING-ERROR argument that indicates how to handle decoding errors when reading the file.
  • RUN-PROGRAM accepts :EXTERNAL-FORMAT parameter to specify the external format for streams that are created.
  • READ-CHAR signals errors on non-character streams. READ-BYTE signals errors on character streams. This is a change from previous versions. However, both will work if the stream is a binary-text-stream.
  • REALPART and IMAGPARG no longer returns 0 instead of the correct part of a complex number in some situations.
20b released

CMUCL 20b has been released. For information on the changes, we refer the reader to the 20b release notes.

2010-09 snapshot and 20b prerelease 2

CMUCL 20b prelease 2 has been released, in preparation for the upcoming 20b release. Therefore there will not be a 2010-09 snapshot.

  • It is possible to hash NaNs (IEEE Not-a-Number)
  • For SSE2 builds, = no longer signals an error if one operand is NaN. This matches what happens for x87.
  • For SSE2 builds, SIGCONTEXT-FLOAT-REGISTER returned the wrong value for single-floats. Easily noticead when tracing a function with single-float arguments.
  • Trac issue #36: file-position broken for utf16 and utf32. FILE-POSITION returns the correct value for UTF16 and UTF32 when there is a BOM (byte-order mark) at the beginning of the file.
2010-08 snapshot and 20b prerelease 1

CMUCL 20b prelease 1 has been released, in preparation for the upcoming 20b release. Therefore there will not be a 2010-08 snapshot.

  • Error handling has been added to external formats. Previously, all external formats would silently replace bad encodings with a suitable replacement character. Now, the user can specify how the errors are handled by using the :DECODING-ERROR and :ENCODING-ERROR parameters to OPEN. The default is the previous behavior.

    For decoding-error, a character, symbol, or function can be given. If a character, then that character is used as the replacement character. For a symbol or function, it must be a function of 3 arguments: a message string, the offending octet (or nil), and the number of octets read in the encoding. If the function returns, it must be the codepoint of the desired replacement.

    For encoding-error, a character, symbol, or function can be given. If a character, then that character is used as the replacement character. For a symbol or function, it must be a function of 2 arguments: a message string and the offending codepoint. If the function returns, it must be the codepoint of the desired replacement.

  • Add EXT:LIST-ALL-EXTERNAL-FORMATS to list all known external formats and their aliases.
  • ADD EXT:DESCRIBE-EXTERNAL-FORMAT to print a description of the specified exernal format. To support this, the macros DEFINE-EXTERNAL-FORMAT and DEFINE-COMPOSING-EXTERNAL-FORMAT have changed.
  • The sparc port now supports the :executable feature.
  • The Mac OS X port now support the :executable feature.
  • A critical bug in the fast unicode stream buffering routine has been fixed. This bug manifests itself by causing valid sequences to be incorrectly decoded, resulting in a replacement character.
  • UTF-8 correctly catches overlong sequences now. Previously, overlong sequences were missed.
  • When UTF-8 decoder encounters an overlong sequence, a surrogate code point, or a too-large codepoint, the entire sequence is converted to the replacement character. Previously, all of the octets except the first were put back, and the data read again.
  • Some GC improvements for sparc and ppc. (Changes for ppc untested). GC could incorrectly move the PC and other registers, causing a segfault.
  • A bug inadvertently introduced in the 2010-04 non-unicode snapshot has been fixed. The bug prevented the non-unicode versions of CMUCL from loading the external format aliases file.
  • With SSE2, the imaginary part of a (complex single-float) is now returned correctly.
  • The method used to create executable images for Linux has been cleaned up and should be far more robust against different versions of the OS. The same is true on sparc as well as Mac OS X.
2010-07 snapshot

  • DELETE-FILE, ENSURE-DIRECTORIES-EXIST, FILE-AUTHOR, FILE-WRITE-DATE, and OPEN now merge the given pathname with *DEFAULT-PATHNAME-DEFAULTS* as required by CLHS sec 19.2.3.
  • When printing out argument values in the debugger and also during TRACE, the incorrect values were returned for the SSE2 core. This was caused by using the x87 values instead of the sse2 values in the sigcontext. This is fixed now.
2010-06 snapshot

  • ASDF2 and MK-DEFSYS have been added as contrib modules. Use (require :asdf) or (require :defsystem) to load these.
  • A new switch, -help has been added. This prints out a brief summary of the available command line switches and exists. You may also use --help.
  • The GCD of positive integers sometimes returned a negative result. This is fixed.
2010-05 snapshot

  • Source information (file) for defstructs and deftypes is now provided. DESCRIBE will print out the name of the file where the defstruct/deftype was defined.
  • WITH-STANDARD-IO-SYNTAX uses the standard pprint dispatch table now instead of the current table.
  • PRINC-TO-STRING binds *PRINT-READABLY* to NIL as required. Previously, it used the current value of *PRINT-READABLY*.
  • DEFCLASS signals an error if the class name already names a DECLARATION.
  • The :METHOD-CLASS argument to ENSURE-GENERIC-FUNCTION can be a class object as well as a name.
  • Recognize but ignore the :DECLARE argument to ENSURE-GENERIC-FUNCTION.
  • Default documentation for short form of DEFINE-METHOD-COMBINATION is NIL, not "".
  • MAC is an alias for the CR composing external format.
  • Trac #39: non-standard-lexical syntax is fixed. The reader macros are no longer installed by default. Use (intl:install) to install them.
2010-04 snapshot

  • Support for internalization/localization added. Messages from CMUCL can be translated, but currently only a few messages in Korean are translated. For fun, there is a full Pig Latin translation (done by machine).
  • COMPILE will update the macro-function if the specified names a macro. (Previously, the fdefinition of the name was set.)
  • CMUCL now signals a cerror when attempting to redefine a slot accessor via DEFUN or COMPILE. If continued, the accessor is redefined, and CMUCL assumes the new definition is usable as a slot accessor. Previously, CMUCL would print a warning and undefine the structure.
  • An issue with SSE2 and GC hooks has been fixed. This shows up when doing arithmetic with GC hooks that use the SSE registers. The SSE state is saved along with the x87 state.
2010-03 snapshot

  • FROUND is much faster for single and double float numbers. This is available everywhere, except for x87 (due to potential roundoff errors.)
  • CMUCL no longer segfaults on Linux when running on a kernel without COMPAT_BRK. CMUCL will set the personality appropriately and re-exec itself.
  • GET-MACRO-CHARACTER would return the wrong second value because *READTABLE* was always being used instead of the specified readtable.
  • COMPILE-FILE was generating an error when compiling COMPILE forms. This is fixed.
  • A critical bug in SSE2 support has been fixed. Multiplying a complex single-float by a single-float produced the wrong result.
  • Fix issue where CMUCL does not correctly handle FLETs in DEFMETHOD bodies which use the same name as that of the generic function. The generic function was called instead of the local function.
  • CMUCL would fail to compile external formats if *READTABLE* was not the standard readtable. This is fixed by binding *READTABLE* to the standard readtable before compiling the external format.
  • The debugger help messages is updated to reflect the actual implementation. In particular L and PP have been updated, and help for the DESCRIBE command has been added
2010-02

  • Some issues with FILE-POSITION on unicode builds have been fixed. However, FILE-POSITION is still incorrect for files using external formats that have a byte-order mark.
  • The error-output and trace-file files are now opened using the same external format as specified in COMPILE-FILE. This ensures that these output files can correctly represent the same characters as used for the input file.
  • The debugger now opens files using the same external format as used to compile them. Previously, the default format was used, which would be wrong if the file is in a different format. This resulted in the debugger being unable to find the source forms.
  • TRANSLATE-PATHNAMES now creates the resulting path to be an absolute or relative path according to whether the TO pathname is abslute or relative. Previously, the result was take from the SOURCE pathname, except if TO were absolute, in which case the result was absolute.
2010-01-04

Experimental support for static arrays has been added. These are allocated in foreign (malloc) space and are never moved by GC. They are, however, properly garbage collected. To create an array, use MAKE-ARRAY with :ALLOCATION :MALLOC. Only arrays of character; 8, 16, and 32-bit integers (signed or unsigned); single and double floats; and complex single and double floats are supported.

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