/[cmucl]/src/general-info/release-20a.txt
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Revision 1.15.2.1 - (hide annotations)
Wed Aug 26 17:03:35 2009 UTC (4 years, 7 months ago) by rtoy
Branch: RELEASE-20A-BRANCH
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o Update to 20a.
o Update with known issues.
1 rtoy 1.1 ========================== C M U C L 20 a =============================
2    
3     The CMUCL project is pleased to announce the release of CMUCL 20a.
4     This is a major release which contains numerous enhancements and
5 rtoy 1.7 bugfixes from the 19f release.
6 rtoy 1.1
7     CMUCL is a free, high performance implementation of the Common Lisp
8     programming language which runs on most major Unix platforms. It
9     mainly conforms to the ANSI Common Lisp standard. CMUCL provides a
10     sophisticated native code compiler; a powerful foreign function
11     interface; an implementation of CLOS, the Common Lisp Object System,
12     which includes multimethods and a metaobject protocol; a source-level
13     debugger and code profiler; and an Emacs-like editor implemented in
14     Common Lisp. CMUCL is maintained by a team of volunteers collaborating
15     over the Internet, and is mostly in the public domain.
16    
17     New in this release:
18    
19 rtoy 1.15.2.1 * Known issues:
20     - On Linux and FreeBSD, it may not be possible call SAVE-LISP and
21     create executables. This seems to be broken on FreeBSD. On
22     Linux, it seems to depend on what version of Linux is used to
23     create the executable. Redhat Enterprise Linux appears to be
24     ok, but Open SuSE 10.x is not.
25    
26 rtoy 1.1 * Feature enhancements:
27 rtoy 1.7 - Support for Unicode has been added. You have Unicode support if
28     *FEATURES* includes :UNICODE.
29     o CHAR-CODE-LIMIT is 65536.
30     o There is only one character type; CHARACTER and BASE-CHAR are
31     the same types.
32     o There is only one string type; STRING and BASE-STRING are the
33     same type. All strings are UTF-16 strings and therefore
34     contain UTF-16 surrogate pairs. While most string functions
35     correctly handle surrogate pairs, not all do. It is up to the
36     user to handle this. In particular, processing of strings on
37     a character-by-character basis will need to handle surrogate
38     pairs.
39     o External formats are supported. Functions that need to know
40     the external format take an :EXTERNAL-FORMAT keyword argument
41     to specify the format.
42     + The special variable STREAM:*DEFAULT-EXTERNAL-FORMAT*
43     specifies the default format to be used for all streams.
44 rtoy 1.13 The default value is :iso8859-1.
45     + The standard streams, *standard-input*, *standard-output*,
46     and *standard-error* all default to
47 rtoy 1.15 *default-external-format* (which itself defaults to
48     :iso8859-1). You can change the encoding used for these
49     streams by calling STREAM:SET-SYSTEM-EXTERNAL-FORMAT to set
50     the encoding for all three streams. Alternatively, you can
51     use (setf external-format) to change the format for each
52     stream.
53 rtoy 1.7 + Many external formats are supported. The complete list is
54     in aliases, but we support at least :ISO-8859-1, :UTF-8,
55     :UTF-16, :UTF-32, :CRLF.
56     o CHAR-LESSP and friends perform case-folding by converting to
57     lowercase. (The non-Unicode version converted to uppercase.)
58     o STRING<, STRING>, and friends compare strings in codepoint order.
59     o STRING-LESSP, STRING-GREATERP, and friends compare strings in
60     codepoint order after doing a case-folding operation on each
61     codepoint. The case-folding operation converts each
62     codepoint to the corresponding lowercase codepoint.
63     o UTF16-STRING-P checks to see if a string is a valid UTF-16
64     encoded string.
65     o Unicode normalization forms are supported via STRING-TO-NFC,
66     STRING-TO-NFKC, STRING-TO-NFD, and STRING-TO-NFKD.
67     o Symbols are always normalized to NFC form.
68    
69     - WRITE-VECTOR and READ-VECTOR support vectors of with element
70 rtoy 1.8 sizes of 1 bit, 2 bits and 4 bits. For :NETWORK-ORDER, the
71     bytes are written such that the lowest indexed element is
72     written to the most significant part of a byte.
73 rtoy 1.1
74     * ANSI compliance fixes:
75 rtoy 1.14 - MERGE-PATHNAMES no longer generates pathnames whose directory
76     component doesn't start with either :ABSOLUTE or :RELATIVE.
77     MERGE-PATHNAMES also signals errors if the generated pathname
78     directory is invalid (such as :ABSOLUTE followed by :BACK).
79 rtoy 1.1
80     * Bugfixes:
81 rtoy 1.3 - CMUCL sometimes gets "stuck" during compilation where it is
82     trying to simplify the union of a large number of disjoint
83     numeric types. Previously, we handled the case of integer
84     types. Extend this to handle floats as well.
85 rtoy 1.4 - SXHASH was computing the same hash code for upper and lower case
86     characters by upcasing the character. This isn't necessary
87     since the characters are not EQUAL, so make SXHASH return
88     different values for upper and lower case letter.
89 rtoy 1.6 - WRITE-VECTOR was not writing out enough data when no
90     byte-swapping is needed and the end index was not given.
91     (Confusion about the length of the vector versus the index as an
92     octet count, not element count.)
93 rtoy 1.7 - Motif (CLM) should work with Unicode.
94 rtoy 1.8 - The stream created by WITH-INPUT-FROM-STREAM was not properly
95     closed.
96     - SXHASH was returning different values for -0f0 and -0d0 for
97 rtoy 1.15.2.1 compiled and interpreted code. They both return the same value
98 rtoy 1.8 now.
99     - Some issues with potential spurious floating-point exceptions
100     with complex arithmetic on x86 with SSE2 have been fixed.
101     (Random junk in unused parts of an sse2 register could cause
102     spurious FP exceptions.)
103     - Numeric contagion for complex + real and complex - real was not
104     done correctly in compiled code. Proper contagion is now done
105     by converting the real to a complex before performing the
106     operation.
107     - CMUCL can now handle the X11 local Unix display connection on
108     Mac OS X.
109     - SETF-SLOT-VALUE-USING-CLASS-DFUN no longer signals errors when
110     checking the new value against the declared slot type when the
111     declared slot type was too hairy for TYPEP.
112 rtoy 1.9 - GENTEMP no longer generates the wrong symbol if the
113     pretty-printer is used.
114 rtoy 1.10 - Some issues with slow allocation with gencgc have been worked
115     around. Certain allocation sequences were causing all
116     allocations to be done out-of-line into an almost full
117     allocation region. This was especially evident on sparc and ppc
118     when running the ansi test suite from gcl on a unicode build.
119     CMUCL will attempt to detect this and abandon the region,
120     allowing inline allocation to be done again.
121 rtoy 1.11 - For x86 builds, the floating-point precision was incorrectly set
122     to 64 bits (long-float) instead of 53 bits (double-float). This
123     is fixed now.
124 rtoy 1.1
125     * Trac Tickets:
126 rtoy 1.2 #31: pathname bug with :case :common
127     Fixed. The common case is applied to each part of the directory,
128     not to the directory as a whole.
129 rtoy 1.1
130     * Other changes:
131 rtoy 1.5 - SOFTWARE-VERSION may return different results than previously.
132     UNIX:UNIX-UNAME is now used to obtain the software version on
133     Linux and Solaris.
134 rtoy 1.10 - User's manual updated with a section on internationalization
135 rtoy 1.8 (unicode).
136     - DESCRIBE on characters includes the character's code and name.
137     - CLX updated to the portable clx version from Christophe Rhodes
138     darcs repository of 2009-06-16.
139 rtoy 1.14 - make-dist.sh will also install the source code in the specified
140     directory if -I and -S are given.
141 rtoy 1.15 - CMUCL contribs (in the src/contribs directory) are now
142     distributed as part of extras package. The contribs can be
143     loaded by first using (require "cmu-contribs"). Then the
144     individual contribs can be loaded with require. The available
145     contribs are, "contrib-demos", "contrib-follow-mouse",
146     "contrib-games-feebs", "contrib-hist", "contrib-psgraph",
147     "contrib-ops", "contrib-embedded-c", "contrib-sprof". The names
148     must be given as lower case strings. These are not officially
149     supported as part of CMUCL, but users may find them useful.
150 rtoy 1.1
151     * Improvements to the PCL implementation of CLOS:
152    
153     * Changes to building procedure:
154 rtoy 1.12 - The sparc config fils are now named sparc_gcc and sparc_sunc,
155     which use gcc and Sun C, respectively, for the C compiler. Only
156     Solaris is supported. The old sun4_solaris_gcc and
157     sun4_solaris_sunc configs are deprecated.
158    
159 rtoy 1.15 * Known issues:
160     - The :executable feature, while enabled for FreeBSD and Linux,
161     may not be working.
162 rtoy 1.1
163     This release is not binary compatible with code compiled using CMUCL
164     19f; you will need to recompile FASL files.
165    
166     See <URL:http://www.cons.org/cmucl/> for download information,
167     guidelines on reporting bugs, and mailing list details.
168    
169    
170     We hope you enjoy using this release of CMUCL!
171    

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