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Contents of /src/general-info/release-20a.txt

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Wed Aug 19 17:49:54 2009 UTC (4 years, 7 months ago) by rtoy
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1 rtoy 1.1 ========================== C M U C L 20 a =============================
3     [--- WORK IN PROGRESS ---]
5     The CMUCL project is pleased to announce the release of CMUCL 20a.
6     This is a major release which contains numerous enhancements and
7 rtoy 1.7 bugfixes from the 19f release.
8 rtoy 1.1
9     CMUCL is a free, high performance implementation of the Common Lisp
10     programming language which runs on most major Unix platforms. It
11     mainly conforms to the ANSI Common Lisp standard. CMUCL provides a
12     sophisticated native code compiler; a powerful foreign function
13     interface; an implementation of CLOS, the Common Lisp Object System,
14     which includes multimethods and a metaobject protocol; a source-level
15     debugger and code profiler; and an Emacs-like editor implemented in
16     Common Lisp. CMUCL is maintained by a team of volunteers collaborating
17     over the Internet, and is mostly in the public domain.
19     New in this release:
21     * Feature enhancements:
22 rtoy 1.7 - Support for Unicode has been added. You have Unicode support if
23     *FEATURES* includes :UNICODE.
24     o CHAR-CODE-LIMIT is 65536.
25     o There is only one character type; CHARACTER and BASE-CHAR are
26     the same types.
27     o There is only one string type; STRING and BASE-STRING are the
28     same type. All strings are UTF-16 strings and therefore
29     contain UTF-16 surrogate pairs. While most string functions
30     correctly handle surrogate pairs, not all do. It is up to the
31     user to handle this. In particular, processing of strings on
32     a character-by-character basis will need to handle surrogate
33     pairs.
34     o External formats are supported. Functions that need to know
35     the external format take an :EXTERNAL-FORMAT keyword argument
36     to specify the format.
37     + The special variable STREAM:*DEFAULT-EXTERNAL-FORMAT*
38     specifies the default format to be used for all streams.
39 rtoy 1.13 The default value is :iso8859-1.
40     + The standard streams, *standard-input*, *standard-output*,
41     and *standard-error* all default to
42 rtoy 1.15 *default-external-format* (which itself defaults to
43     :iso8859-1). You can change the encoding used for these
44     streams by calling STREAM:SET-SYSTEM-EXTERNAL-FORMAT to set
45     the encoding for all three streams. Alternatively, you can
46     use (setf external-format) to change the format for each
47     stream.
48 rtoy 1.7 + Many external formats are supported. The complete list is
49     in aliases, but we support at least :ISO-8859-1, :UTF-8,
50     :UTF-16, :UTF-32, :CRLF.
51     o CHAR-LESSP and friends perform case-folding by converting to
52     lowercase. (The non-Unicode version converted to uppercase.)
53     o STRING<, STRING>, and friends compare strings in codepoint order.
54     o STRING-LESSP, STRING-GREATERP, and friends compare strings in
55     codepoint order after doing a case-folding operation on each
56     codepoint. The case-folding operation converts each
57     codepoint to the corresponding lowercase codepoint.
58     o UTF16-STRING-P checks to see if a string is a valid UTF-16
59     encoded string.
60     o Unicode normalization forms are supported via STRING-TO-NFC,
62     o Symbols are always normalized to NFC form.
64     - WRITE-VECTOR and READ-VECTOR support vectors of with element
65 rtoy 1.8 sizes of 1 bit, 2 bits and 4 bits. For :NETWORK-ORDER, the
66     bytes are written such that the lowest indexed element is
67     written to the most significant part of a byte.
68 rtoy 1.1
69     * ANSI compliance fixes:
70 rtoy 1.14 - MERGE-PATHNAMES no longer generates pathnames whose directory
71     component doesn't start with either :ABSOLUTE or :RELATIVE.
72     MERGE-PATHNAMES also signals errors if the generated pathname
73     directory is invalid (such as :ABSOLUTE followed by :BACK).
74 rtoy 1.1
75     * Bugfixes:
76 rtoy 1.3 - CMUCL sometimes gets "stuck" during compilation where it is
77     trying to simplify the union of a large number of disjoint
78     numeric types. Previously, we handled the case of integer
79     types. Extend this to handle floats as well.
80 rtoy 1.4 - SXHASH was computing the same hash code for upper and lower case
81     characters by upcasing the character. This isn't necessary
82     since the characters are not EQUAL, so make SXHASH return
83     different values for upper and lower case letter.
84 rtoy 1.6 - WRITE-VECTOR was not writing out enough data when no
85     byte-swapping is needed and the end index was not given.
86     (Confusion about the length of the vector versus the index as an
87     octet count, not element count.)
88 rtoy 1.7 - Motif (CLM) should work with Unicode.
89 rtoy 1.8 - The stream created by WITH-INPUT-FROM-STREAM was not properly
90     closed.
91     - SXHASH was returning different values for -0f0 and -0d0 for
92     compiled and interpreted code. The both return the same value
93     now.
94     - Some issues with potential spurious floating-point exceptions
95     with complex arithmetic on x86 with SSE2 have been fixed.
96     (Random junk in unused parts of an sse2 register could cause
97     spurious FP exceptions.)
98     - Numeric contagion for complex + real and complex - real was not
99     done correctly in compiled code. Proper contagion is now done
100     by converting the real to a complex before performing the
101     operation.
102     - CMUCL can now handle the X11 local Unix display connection on
103     Mac OS X.
104     - SETF-SLOT-VALUE-USING-CLASS-DFUN no longer signals errors when
105     checking the new value against the declared slot type when the
106     declared slot type was too hairy for TYPEP.
107 rtoy 1.9 - GENTEMP no longer generates the wrong symbol if the
108     pretty-printer is used.
109 rtoy 1.10 - Some issues with slow allocation with gencgc have been worked
110     around. Certain allocation sequences were causing all
111     allocations to be done out-of-line into an almost full
112     allocation region. This was especially evident on sparc and ppc
113     when running the ansi test suite from gcl on a unicode build.
114     CMUCL will attempt to detect this and abandon the region,
115     allowing inline allocation to be done again.
116 rtoy 1.11 - For x86 builds, the floating-point precision was incorrectly set
117     to 64 bits (long-float) instead of 53 bits (double-float). This
118     is fixed now.
119 rtoy 1.1
120     * Trac Tickets:
121 rtoy 1.2 #31: pathname bug with :case :common
122     Fixed. The common case is applied to each part of the directory,
123     not to the directory as a whole.
124 rtoy 1.1
125     * Other changes:
126 rtoy 1.5 - SOFTWARE-VERSION may return different results than previously.
127     UNIX:UNIX-UNAME is now used to obtain the software version on
128     Linux and Solaris.
129 rtoy 1.10 - User's manual updated with a section on internationalization
130 rtoy 1.8 (unicode).
131     - DESCRIBE on characters includes the character's code and name.
132     - CLX updated to the portable clx version from Christophe Rhodes
133     darcs repository of 2009-06-16.
134 rtoy 1.14 - make-dist.sh will also install the source code in the specified
135     directory if -I and -S are given.
136 rtoy 1.15 - CMUCL contribs (in the src/contribs directory) are now
137     distributed as part of extras package. The contribs can be
138     loaded by first using (require "cmu-contribs"). Then the
139     individual contribs can be loaded with require. The available
140     contribs are, "contrib-demos", "contrib-follow-mouse",
141     "contrib-games-feebs", "contrib-hist", "contrib-psgraph",
142     "contrib-ops", "contrib-embedded-c", "contrib-sprof". The names
143     must be given as lower case strings. These are not officially
144     supported as part of CMUCL, but users may find them useful.
145 rtoy 1.1
146     * Improvements to the PCL implementation of CLOS:
148     * Changes to building procedure:
149 rtoy 1.12 - The sparc config fils are now named sparc_gcc and sparc_sunc,
150     which use gcc and Sun C, respectively, for the C compiler. Only
151     Solaris is supported. The old sun4_solaris_gcc and
152     sun4_solaris_sunc configs are deprecated.
154 rtoy 1.15 * Known issues:
155     - The :executable feature, while enabled for FreeBSD and Linux,
156     may not be working.
157 rtoy 1.1
158     This release is not binary compatible with code compiled using CMUCL
159     19f; you will need to recompile FASL files.
161     See <URL:http://www.cons.org/cmucl/> for download information,
162     guidelines on reporting bugs, and mailing list details.
165     We hope you enjoy using this release of CMUCL!

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