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

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1 rtoy 1.1 ========================== C M U C L 20 a =============================
2    
3     [--- WORK IN PROGRESS ---]
4    
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.
18    
19     New in this release:
20    
21    
22     * Feature enhancements:
23 rtoy 1.7 - Support for Unicode has been added. You have Unicode support if
24     *FEATURES* includes :UNICODE.
25     o CHAR-CODE-LIMIT is 65536.
26     o There is only one character type; CHARACTER and BASE-CHAR are
27     the same types.
28     o There is only one string type; STRING and BASE-STRING are the
29     same type. All strings are UTF-16 strings and therefore
30     contain UTF-16 surrogate pairs. While most string functions
31     correctly handle surrogate pairs, not all do. It is up to the
32     user to handle this. In particular, processing of strings on
33     a character-by-character basis will need to handle surrogate
34     pairs.
35     o External formats are supported. Functions that need to know
36     the external format take an :EXTERNAL-FORMAT keyword argument
37     to specify the format.
38     + The special variable STREAM:*DEFAULT-EXTERNAL-FORMAT*
39     specifies the default format to be used for all streams.
40 rtoy 1.13 The default value is :iso8859-1.
41     + The standard streams, *standard-input*, *standard-output*,
42     and *standard-error* all default to
43     *default-external-format*. You can change the encoding used
44     for these streams by calling
45     STREAM:SET-SYSTEM-EXTERNAL-FORMAT to set the encoding for
46     all three streams. Alternatively, you can use (setf
47     external-format) to change the format for each 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,
61     STRING-TO-NFKC, STRING-TO-NFD, and STRING-TO-NFKD.
62     o Symbols are always normalized to NFC form.
63    
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    
71     * Bugfixes:
72 rtoy 1.3 - CMUCL sometimes gets "stuck" during compilation where it is
73     trying to simplify the union of a large number of disjoint
74     numeric types. Previously, we handled the case of integer
75     types. Extend this to handle floats as well.
76 rtoy 1.4 - SXHASH was computing the same hash code for upper and lower case
77     characters by upcasing the character. This isn't necessary
78     since the characters are not EQUAL, so make SXHASH return
79     different values for upper and lower case letter.
80 rtoy 1.6 - WRITE-VECTOR was not writing out enough data when no
81     byte-swapping is needed and the end index was not given.
82     (Confusion about the length of the vector versus the index as an
83     octet count, not element count.)
84 rtoy 1.7 - Motif (CLM) should work with Unicode.
85 rtoy 1.8 - The stream created by WITH-INPUT-FROM-STREAM was not properly
86     closed.
87     - SXHASH was returning different values for -0f0 and -0d0 for
88     compiled and interpreted code. The both return the same value
89     now.
90     - Some issues with potential spurious floating-point exceptions
91     with complex arithmetic on x86 with SSE2 have been fixed.
92     (Random junk in unused parts of an sse2 register could cause
93     spurious FP exceptions.)
94     - Numeric contagion for complex + real and complex - real was not
95     done correctly in compiled code. Proper contagion is now done
96     by converting the real to a complex before performing the
97     operation.
98     - CMUCL can now handle the X11 local Unix display connection on
99     Mac OS X.
100     - SETF-SLOT-VALUE-USING-CLASS-DFUN no longer signals errors when
101     checking the new value against the declared slot type when the
102     declared slot type was too hairy for TYPEP.
103 rtoy 1.9 - GENTEMP no longer generates the wrong symbol if the
104     pretty-printer is used.
105 rtoy 1.10 - Some issues with slow allocation with gencgc have been worked
106     around. Certain allocation sequences were causing all
107     allocations to be done out-of-line into an almost full
108     allocation region. This was especially evident on sparc and ppc
109     when running the ansi test suite from gcl on a unicode build.
110     CMUCL will attempt to detect this and abandon the region,
111     allowing inline allocation to be done again.
112 rtoy 1.11 - For x86 builds, the floating-point precision was incorrectly set
113     to 64 bits (long-float) instead of 53 bits (double-float). This
114     is fixed now.
115 rtoy 1.1
116     * Trac Tickets:
117 rtoy 1.2 #31: pathname bug with :case :common
118     Fixed. The common case is applied to each part of the directory,
119     not to the directory as a whole.
120 rtoy 1.1
121     * Other changes:
122 rtoy 1.5 - SOFTWARE-VERSION may return different results than previously.
123     UNIX:UNIX-UNAME is now used to obtain the software version on
124     Linux and Solaris.
125 rtoy 1.10 - User's manual updated with a section on internationalization
126 rtoy 1.8 (unicode).
127     - DESCRIBE on characters includes the character's code and name.
128     - CLX updated to the portable clx version from Christophe Rhodes
129     darcs repository of 2009-06-16.
130 rtoy 1.1
131     * Improvements to the PCL implementation of CLOS:
132    
133     * Changes to building procedure:
134 rtoy 1.12 - The sparc config fils are now named sparc_gcc and sparc_sunc,
135     which use gcc and Sun C, respectively, for the C compiler. Only
136     Solaris is supported. The old sun4_solaris_gcc and
137     sun4_solaris_sunc configs are deprecated.
138    
139 rtoy 1.1
140     This release is not binary compatible with code compiled using CMUCL
141     19f; you will need to recompile FASL files.
142    
143     See <URL:http://www.cons.org/cmucl/> for download information,
144     guidelines on reporting bugs, and mailing list details.
145    
146    
147     We hope you enjoy using this release of CMUCL!
148    

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