/[cmucl]/src/general-info/beta-release-notes.txt
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Revision 1.15 - (hide annotations)
Mon Feb 14 23:16:39 1994 UTC (20 years, 2 months ago) by ram
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Update for 17e
1 ram 1.15 Release notes for CMU Common Lisp 17e, 19 September 93
2    
3     17e is primarily a bug-fix release. This release also supports
4     Hewlett-Packard 700-series workstations running HP-UX version 9.x.
5    
6    
7     BASIC COMMON LISP SUPPORT CODE:
8    
9     Enhancements:
10     -- The function EXT:PURIFY is now exported. This was formerly only
11     documented as usable via the :PURIFY argument to SAVE-LISP. Great
12     improvements in GC runtime and memory use can be obtained when PURIFY is
13     called after loading in large amounts of code or creating large
14     datastructures that are unlikely to become garbage.
15     -- EXT:PURIFY (and thus (EXT:SAVE-LISP ... :PURIFY T) now compact the
16     hashtables representing the global namespace. Formerly this feature was
17     undocumented and only used during the initial system build.
18     -- There is now a "runtime" version of the Lisp image which omits the
19     compiler and loads some other code byte compiled, giving a 60% size
20     reduction. See README file, "Runtime distribution" section.
21     -- Changed the byte-function and byte-closure funcallable-instances to use
22     &more args instead of a &rest arg (eliminating the main source of
23     grautitous consing in byte code.)
24     -- Allow pretty-printer to work without compiler loaded.
25     -- Improved (and thus changed) the SXHASH of lists and other composite
26     objects.
27     -- Added to *FEATURES* all of the ANSI CL features that seemed plausible.
28     Any non-ANSI compliance is now a bug, not a feature...
29     -- Picked up Miles' changes to apropos and apropos-list that allows one to
30     supply NIL for the package, meaning all packages.
31    
32     Bug fixes:
33     -- Fix arg ordering for GETF in new condition support. Default the name
34     slot in DEFMACRO-LAMBDA-LIST-BIND-ERRORS to NIL (instead of leaving it
35     unbound.)
36     -- In READ-N-BYTES, only signal EOF when we read and got 0 bytes, not
37     whenever read returns less than we wanted. Also, fix the case of small
38     reads with an empty buffer not to leave garbled buffer pointers if we have
39     to do more than one read. These bugs mostly affect the X interface and
40     its users (Garnet was having problems.)
41     -- Changed YES-OR-NO-P and Y-OR-N-P to force output.
42     -- Fixed COUNT :TEST-NOT to actually negate the test.
43     -- Fixed COERCE to call type-expand so that people can coerce to deftypes.
44     -- Rename STEP to DEBUG::SET-STEP-BREAKPOINT because step is supposed to be
45     the exported step macro, not some internal routine.
46     -- Fixed DEFPACKAGE to combine multiple use, export, and import options
47     correctly. Fixed the warning about no longer using some packages to
48     actually work.
49     -- Fixed GCD to correctly handle MOST-NEGATIVE-FIXNUM.
50     -- Flush Hemlock font change hack in default site-init.lisp, since it was
51     causing problems.
52    
53     CLOS (PCL):
54     -- Add some hacks for coercing lisp:class objects to pcl:class.
55     -- Export MAKE-LOAD-FORM-SAVING-SLOTS, not MAKE-LOAD-FORM-DUMPING-SLOTS.
56     -- Fix some problems with the LISP:CLASS class-precedence-list suddenly
57     becoming empty when a class is redefined.
58     -- Fixed SIMPLE-STRING to list STRING in the inherits list.
59    
60    
61     COMPILER:
62    
63     Enhancements:
64     -- Added a type inference method for LOG's result type.
65     -- Added support for "more args" which are like rest args, but don't cons.
66     This is used for calling into annd out of byte-compiled core and in the
67     PROFILE package.
68     -- Increase *inline-expansion-limit* from 50 to 200. Change "inline
69     expansion count exceeded" warning to be a note. Don't inline expand in
70     interpreted code.
71    
72     Bug fixes:
73     -- Fix a problem where spurious argument types could be inferred for optional
74     arguments in byte-compiled code (caused yes-or-no-p to fail.)
75     -- Fixed an internal error related to tail local calls.
76     -- Fixed assertion failure about COMPONENT-NEW-FUNCTIONS with some inline
77     expansions.
78     -- Fixed (TYPEP X '(REAL ...)) to actually test against REAL, not NUMBER.
79     -- Fixed a problem where top-level MULTIPLE-VALUE-CALL forms could cause an
80     assertion falure.
81     -- Don't try to compile flow-graph components that are unreachable. This
82     avoids some internal errors when unreachable local functions are
83     deleted.
84     -- Fix problem with byte-compiling PROGV getting an internal compiler error.
85    
86    
87     EXTENSIONS:
88    
89     Misc extensions:
90     -- Added an executable-only optional to EXT:UNIX-NAMESTRING so that we can
91     expand path:foo into the first executable in the path named foo, not just
92     the first file
93     -- Changed RUN-PROGRAM to only try to run executables, and to flame out if it
94     can't be found in path:.
95     -- Profile: use &more instead of &rest to avoid consing the &rest arg list.
96     Fixed PROFILE:REPORT-TIME to not choke if any of the function names are
97     not symbols (e.g. setf functions).
98    
99     Motif interface:
100     -- Added an optional STYLE arg to the graphical inspector to make the
101     function consistent with its doc string (as well as the old inspector).
102     -- Tried to make starting the Motif server more robust, or at least give some
103     intelligible error message.
104     -- Added some extra protection against recursive invocation of the windowing
105     debugger.
106    
107     Hemlock:
108     -- Add window-buffer-hook for echo area buffer to make absolutely sure we
109     can't change the eacho area window to point to another buffer.
110     -- Give a sensible error message if we can't find the slave utility (e.g.
111     lisp) to run.
112     -- Restored the behavior of scribe-file to cd to the directory of the .mss
113     file before running scribe.
114     -- Change default fonts to be courier, flushing all mention of 8x13.
115     Remove font-setting in default site-init file, since it was causing
116     problems.
117     -- Add FILE-POSITION method for region streams so that the compiler's read
118     error recovery works for "Editor Compile Defun", etc.
119     -- When reading a file, set BUFFER-WRITABLE to T before doing anything so
120     that we don't get spurious read-only errors.
121    
122    
123 ram 1.14 Release notes for CMU Common Lisp 17c, 19 September 93
124 ram 1.12
125 ram 1.14 17c is a new major release of CMU Common Lisp. An overview of changes:
126 ram 1.12 -- New structure object representation and class support in the type system.
127     -- PCL better integrated with CMU type system.
128     -- New CLX, PCL.
129     -- Numerous ANSI changes.
130     -- Byte-code compilation option offers more compact code.
131     -- Improvements in compiler source-level optimization, inline expansion and
132     instruction scheduling.
133     -- New fasl file format (you must recompile.)
134     -- Calling of SETF functions is now efficient.
135     -- Speed and space tuning in the compiler and runtime system.
136     -- New TTY debugger commands support stepping compiled code.
137     -- A graphical debugger and inspector based on a Motif interface.
138     -- Changes in the startup code and SAVE-LISP increase portability.
139 ram 1.14 -- Preliminary support for the HP Precision Architecture under HP-UX 9.0
140     (i.e. for HP 700 series.)
141     -- New User's manual. Note that the online Info document has not been
142     updated yet.
143    
144 ram 1.12 And of course, bug fixes...
145    
146     Basic runtime code changes:
147    
148     ANSI cleanups:
149 ram 1.14 -- These functions are now defined:
150     ARRAY-DISPLACEMENT CELL-ERROR-NAME COMPILE-FILE-PATHNAME
151     COPY-STRUCTURE DELETE-PACKAGE INTERACTIVE-STREAM-P
152     LOAD-LOGICAL-PATHNAME-TRANSLATIONS LOGICAL-PATHNAME LOGICAL-PATHNAME-P
153     LOGICAL-PATHNAME-TRANSLATIONS MAKE-LOAD-FORM MAKE-LOAD-FORM-SAVING-SLOTS
154     MAP-INTO OPEN-STREAM-P TRANSLATE-LOGICAL-PATHNAME
155     -- The conditions FLOATING-POINT-INEXACT,
156     FLOATING-POINT-INVALID-OPERATION, and the type FILE-STREAM are now
157     defined.
158     -- Logical pathnames are now implemented. (See "pathnames" below and the
159     user's manual.)
160     -- Allow :UNSPECIFIC and :WILD in all pathname slots where they should be
161     legal; don't always use a :MULTI-CHAR-WILD pattern.
162     -- Support for :COMPILE-TOP-LEVEL, :LOAD-TOP-LEVEL and :EXECUTE keywords to
163     EVAL-WHEN.
164 ram 1.12 -- #S readed no longer forces keywords into the keyword package.
165     -- Various changes to DEFSTRUCT described below.
166     -- IN-PACKAGE now prints a warning if any arguments other than the package
167     name are supplied and signals a correctable error if the package doesn't
168     exist yet.
169     -- DEFPACKAGE now tells you about inconsistencies between any existing package
170     and the DEFPACKAGE form.
171     -- Packages:
172 ram 1.14 - DELETE-PACKAGE function added according to X3J13/92 specification.
173 ram 1.12 Most operations on deleted packages signal an error.
174     - Changed IN-PACKAGE to conform to the new definition. But if you use an
175     old-style IN-PACKAGE, it will use the old behavior.
176     - Rewrote DEFPACKAGE to tell you about inconsistencies between the
177     package and the DEFPACKAGE form.
178     -- Conditions:
179 ram 1.14 - Changed conditions to be non-structure (but also non-PCL) instances
180     that support multiple inheritance and the other required CLOS
181     operations. Removed SIMPLE-CONDITION hacks for simulating multiple
182     inheritance.
183     - DEFINE-CONDITION now corresponds to proposed ANSI CL, which is a subset
184     of DEFINE-CLASS syntax and is incompatible with the earlier KMP syntax.
185     Note that in particular, :INITARG and :READER options are now
186     effectively required on every slot.
187 ram 1.12 - SIMPLE-CONDITION-FORMAT-STRING renamed to
188     SIMPLE-CONDITION-FORMAT-CONTROL.
189     - Implemented CONDITION-RESTARTS ANSI cleanup & WITH-CONDITION-RESTARTS
190     macro. This provides a way to say that restarts are relevant only to a
191     certain condition.
192 ram 1.14 - Added STYLE-WARNING and PARSE-ERROR conditions.
193 ram 1.12 - Added report method for END-OF-FILE and changed system code to signal
194     it.
195     - Added PRINT-NOT-READABLE condition and made people use it.
196     -- Remove some spurious LISP package exports, and add missing ones.
197 ram 1.14 Delete package setup for optional subsystems (hemlock, etc.)
198 ram 1.12 -- Renamed SPECIAL-FORM-P to SPECIAL-OPERATOR-P.
199     -- Renamed GET-SETF-METHOD-MULTIPLE-VALUE to GET-SETF-EXPANSION and
200     DEFINE-SETF-METHOD to DEFINE-SETF-EXPANDER. The old names are still
201     defined for CLtL1 compatability.
202     -- Added degenerate versions of STREAM-EXTERNAL-FORMAT,
203     FILE-STRING-LENGTH and the :EXTERNAL-FORMAT argument to OPEN.
204     -- Hash-table code largely rewritten. MAKE-HASH-TABLE now conforms to
205     the X3J13 spec. Hash-tables can now be dumped as constants in fasl files.
206    
207     Bug fixes:
208     -- Made the "modules:" search-list (used by REQUIRE) default to the current
209     directory.
210     -- Do a BOUNDP check so that references to undefined types inside of a
211     WITH-COMPILATION-UNIT but outside of the compiler won't cause
212     undefined-variable errors.
213     -- Set up a default for modules: search-list.
214     -- Changed BACKQ-UNPARSE to check for improper lists instead of getting an
215 ram 1.14 internal error. Some meaningless backq forms will now pprint as:
216     "### illegal dotted backquote form ###".
217 ram 1.12 -- Added SIMPLE-STYLE-WARNING, and spiffed up the simple-condition hacks so
218     that (typep x 'simple-condition) works.
219     -- In LOAD-FOREIGN, use unix-namestring on each file before passing it to the
220     linker to get rid of search lists.
221     -- Fixed the printer to stop at the fill pointer for strings with fill
222     pointers.
223 ram 1.14 -- Fixed PPRINT-DO to not flame out if one of the binding lists is NIL.
224 ram 1.12 -- Fixed load to not always consider files with NIL type to be source files.
225     If the file exists as specified, then look at the header instead of trying
226     to default the type. If :CONTENTS is specified, then don't try defaulting
227     types.
228     -- Fixed FORMAT-EXP-AUX to correctly handle variable width fields when the
229     argument is negative.
230     -- Use ~C instead of ~A when printing float exponent marker so that
231     *PRINT-READABLY* doesn't mess things up.
232     -- Fixed CLEAR-INPUT on file descriptor streams to flush any unread chars.
233     -- Now that +0.0 and -0.0 are no longer EQL, fixed ATAN to deal with them
234     correctly.
235     -- Changed SAVE-LISP to pad the core file out to CORE_PAGESIZE bytes, so that
236     when we mmap it back it, we won't get bus errors if the real page size is
237     less then the CORE_PAGESIZE.
238     -- Really really fixed GET-SETF-METHOD-MULTIPLE-VALUE for local macros. Also,
239     in the recursive calls, people were not propagating the environment
240     through, and in some places were not recursing with the multiple-value
241     version.
242     -- Fixed FLOAT to float ratios precisely by using integer division instead of
243     float division. This fixes a problem where a bit or two was lost on
244     READing floats.
245 ram 1.14 -- In the Alien type= method for FUNCTION, call ALIEN-TYPE-= instead of
246     calling ALIEN-TYPE-P with two args. [Fix from Mike Clarkson.]
247 ram 1.12
248     Compiler changes:
249    
250     Enhancements:
251 ram 1.14 -- If the argument to compile-file is already absolute, then don't bother
252     expanding it into the TRUENAME. This allows search-lists or logical
253     pathnames to be preserved in the defined-from info (for DESCRIBE, "Edit
254     Definition", etc.)
255     -- Signal a compile-time error for division by constant 0.
256 ram 1.12 -- Replaced the FORMAT transform with one that uses FORMATTER for more
257     complete handling of format directives. This is only enabled when
258     speed > space.
259     -- Compilation to a dense byte-code is now supported, see below.
260     -- Semantic analysis/optimization of function calls has been revamped so that
261     optimizations are done more consistently, especially when the call is a
262     funcall.
263     -- A new approach is now taken to inline expansion, allowing inlining to be
264     done in more cases. In particular:
265     - local functions from LABELS or block compilation can now be inlined,
266     - global function definitions made inside of a local macro or special
267     declaration can now be inlined.
268     Inline expansion is now divided into two separate parts:
269     - Semi-inline expansion introduces a local definition of a global
270     function that has an expansion available. This is now exactly
271     equivalent to block-compiling together with that DEFUN.
272     - Local call analysis introduces new copies of locally defined INLINE
273     functions. This duplication is limited by EXT:*INLINE-EXPANSION-LIMIT*
274     (default 50) to prevent indefinite expansion of recursive functions.
275     This limit may need to be increased for compilations containing many
276     legit inline expansions in order for all calls to be inlined.
277     -- SETF functions are now better supported. Calling a compile-time constant
278     SETF function is now just as efficient as calling a function named by a
279     symbol. This is done by resolving function names to "fdefinition objects"
280     at load time. SYMBOL-FUNCTION of a non-constant symbol is now somewhat
281     slower, since the fdefinition must be located by a table lookup.
282     -- Assembler and disassembler have been reimplemented yet again, giving
283     improved portability and scheduling.
284     -- Assembly optimization is now enabled, giving large speed/space improvements
285     on MIPS and some on SPARC. This optimization is done when speed >
286     compilation-speed (i.e. not by default) since it significantly slows
287     compilation.
288     -- [mips] Lots of tweeks in order to use NIL and 0 directly from the
289     registers holding them instead of copying them into a new register and
290     then using it.
291     -- New funcallable-instance support (for PCL, etc.) Now funcallable instance
292     functions must be specially compiled, which is indicated by creating them
293     with KERNEL:INSTANCE-LAMBDA.
294     -- Moved assumed-type recording of unknown function calls from the beginning
295     of IR1 to the end so that we have the best type information about the
296     arguments.
297     -- Generalized the static-mumble-offset routines to also consider nil a
298     static symbol at offset 0.
299    
300     ANSI changes:
301     -- Make compiler error functions use the condition system. This ANSI cleanup
302     has two advantages:
303     1] compiler-warning and warn are now equivalent, so uses of WARN will be
304     counted in the warning total and given source context.
305     2] user handlers can be defined to notice or suppress output.
306     -- Made DYNAMIC-EXTENT declaration recognized & ignored.
307     -- Allow non-keyword keyword names when the &key keyword is specified
308     separately. In FUNCTION and VALUES types, allow non-keyword symbols; you
309     must now explicitly the ":" in order to get the usual keyword naming.
310     -- Compiler-macros are now supported. See DEFINE-COMPILER-MACRO.
311     -- Minor tweeks to conform to X3J13 cleanup MACRO-DECLARATIONS:MAKE-EXPLICIT.
312     -- Fixed SYMBOL-MACROLET to allow declarations as per X3J13 cleanup SYMBOL-
313     MACROLET-DECLARE:ALLOW. When declaring things about symbol macros, type
314     declarations just wrap (the type ...) around the expansion, special
315     declarations signal an error, and ignore/ignorable declarations are
316     ignored.
317    
318     Tuning:
319 ram 1.14 -- Tuning based on instruction-counting profiling of the compiler --- added
320     missing declarations, etc. This also motivated some general
321     array/sequence optimizations (see below.)
322 ram 1.12 -- Added block compilation declarations. Moved some stuff around to get
323     better locality.
324     -- Changed IR1-ERROR-BAILOUT to do fewer special bindings.
325     -- Inline expand some simple utility functions.
326     -- Some changes to increase the sharing among some of the automatically
327     generated functions in the compiler backend.
328    
329     Bug fixes:
330     -- [sparc,mips] Fixed a bug in default-unknown-values where it wouldn't
331     default the first unsupplied value to nil if more then 6 values where
332     supplied.
333     -- Structure slot accessors are no longer constant-folded, because that was
334     causing problems with some MAKE-LOAD-FORM hacks.
335 ram 1.14 -- Fixed numeric type inference to realize that contagion causes the result
336     of SINGLE-FLOAT & REAL to be FLOAT, not SINGLE-FLOAT.
337 ram 1.12 -- In FINALIZE-XEP-DEFINITION, if not the current global definition, just
338     leave the defined type alone, instead of clobbering it with FUNCTION. A
339     benefit of this is that COMPILE doesn't trash the function type.
340     -- Don't run the back-end(s) on components with no code.
341     -- Don't compile load-time-value lambdas if they've already been compiled
342     because they ended up in a non-top-level component. Also, the function
343     holding a load-time-value form also has a more sensible debug name.
344     -- Fixed a problem with ASSERT-DEFINITION-TYPE when we have a keyword arg
345     with a non-constant default.
346     -- Fixed several uses of FIND to use EQUAL instead of EQL to compare function
347     names, because (SETF mumble) is now a valid function name, and isn't
348     necessarily EQL.
349     -- Bind *GENSYM-COUNTER* around compilation that it doesn't get side
350     effected.
351     -- Fixed a bug in type inference which seems to have generally prevented
352     anything from being inferred about function result types.
353     -- Fixed several bugs related to the handling of "assignment" local functions
354     (that correspond to a tail-recursive loop.)
355     -- Added a hack to IF-IF optimization to hopefully prevent some spurious
356     unreachable code notes.
357     -- Fixed call to CONTINUATION-DERIVED-TYPE to be CONTINUATION-TYPE so that we
358     don't choke on values types in the functional position.
359     -- Fixed the handling of +/- 0.0:
360     - = is no longer converted to EQL, but is directly handled by the backend.
361     - EQL is converted into a raw comparison of the bits.
362 ram 1.14 -- Fixed several bugs which caused fatal compile-time errors.
363 ram 1.12 -- Fixed LET* to correctly use the internal policy (not the interface policy)
364     for all bindings, not just the first.
365     -- In local call VOPs, must load CALLEE-NFP with MAYBE-LOAD-STACK-TN, since it
366     might not be in a register.
367     -- When iterating over the lamdba-calls in unconverting tail calls, have
368     to ignore any deleted lambda.
369     -- Fixed listify-rest-arg. It was leaving a tagged pointer to unallocated
370     memory in a descriptor register, which would confuse the garbage collector
371     if this value was still around.
372     -- Compile and dump package manipulation forms before evaluating them, so
373     they are dumped with respect to the state of the package system before the
374     form was read, not after.
375    
376     Sparc:
377     -- New pseudo-atomic speeds allocation.
378     -- Added checking for integer division by zero.
379    
380     Mips:
381     -- Changed generic-= and generic-/= to not assume that EQ implies =,
382     because it doesn't in the case of NaNs.
383     -- Major rewrite of many things. Merged mumble-immediate SCs into the
384     immediate SC. Wrote several vops to use :constant arg types better.
385     Rewrote all the type testing stuff. New pseudo-atomic, allocators now
386     inline.
387     -- Fixed UNBIND-TO-HERE to not dereference past the end of the binding stack.
388     -- Changed to load the function from static-function-offset relative to NIL
389     instead of computing the symbol and then loading the function.
390     -- Added Miles' change to use JALI instead of LI/JR now that it exists.
391     -- Fixed a lifetime bug in full call. This only showed up if there were
392     either a variable number or > 6 arguments and the caller was large enough
393     that the compute-lra-from-code couldn't be done in one instruction.
394    
395     Byte compilation:
396    
397     Byte compilation reduces the size of the Lisp process by allowing rarely used
398 ram 1.14 functions to be compiled more compactly. In comparison with 16f, the basic
399     system image is about 20% smaller. The full system with Hemlock CLX, etc., is
400     also 19% smaller even though it contains new code (the Motif interface) because
401     a larger fraction of the extra systems are byte compiled.
402 ram 1.12
403 ram 1.14
404 ram 1.12 Byte compilation overview:
405    
406     The decision to byte-compile or native compile can be done on a per-file or
407     per-code-object basis. COMPILE-FILE now has a :BYTE-COMPILE argument. If T,
408     we byte-compile everything and create a machine-independent fasl file
409     (dependent only on byte order, file type "bytef" or "lbytef".)
410     If :MAYBE (the default, from EXT:*BYTE-COMPILE-DEFAULT*), things are
411     byte-compiled when speed = 0 and debug <= 1. Top-level forms are byte-compiled
412     by default (controlled by ext:*byte-compile-top-level*.)
413    
414     Byte compilation is roughly twice as fast native compilation. Byte compiled
415     code runs 50x--200x slower than native code, and is 6x more dense. This is
416     about 10x faster than the IR1 interpreter, which is itself considered fast in
417     comparison to other Common Lisp interpreters. Historical perspective: this is
418     about as fast as Spice Lisp on a PERQ.
419    
420     Tuning:
421 ram 1.14 -- Tweaked GENSYM so that the CONCATENTATE is open-coded.
422     -- Tweaked WITH-ARRAY-DATA to test for (not (array-header-p )) instead of
423     (simple-array * (*)), since that's much faster. This helps all functions
424     that accept non-simple arrays.
425     -- Transform MEMBER, DELETE and ASSOC to MEMQ, ASSQ and DELQ when possible.
426     Inline expand vector & list POSITION, vector FILL and list DELETE-IF.
427     -- Add some INDEX declarations in simple-string concatenate/replace
428     transforms.
429 ram 1.12 -- made DIGIT-CHAR-P and DIGIT-WEIGHT maybe-inline.
430     -- Added declarations from efficiency notes in fd-stream, load, package,
431     reader, char and hash.
432     -- Revived the support for FAST-READ-CHAR and the STREAM-IN-BUFFER, which
433     allows READ-CHAR and READ-BYTE to be done with 0 function calls rather than
434     2.
435     -- Because of above two changes, both the reader and the fasloader are now
436     significantly faster (reader 2x.)
437     -- Default (non-frozen) structure type tests are now significantly faster (no
438     function calls), and somewhat smaller. This and the reader improvement
439     have sped up the compiler somewhat.
440     -- Many debug-info and compiler data structures are now annotated as pure,
441     alloing them to be put in read-only space. This reduces the amound of
442     stuff in static space, speeding GC.
443     -- Real-valued hash-table parameters (rehash-threshold etc.) are
444     canonicalized to single-floats.
445     -- Replaced ISQRT with a much faster version off the net.
446     -- serve-event now uses UNIX-FAST-SELECT, so it can can handle >32 file
447     descriptors and is more efficient.
448     -- Changed UNIX-FAST-SELECT to a macro so that it can be efficient. Changed
449     FD-SET stuff to be efficiently compilable.
450     -- Use an auxiliary function to make the condition for macro arg count
451     errors to save space in macro definitions.
452 ram 1.14 -- Byte compile the expander functions for all macros except those in the
453     cold load. Byte-compile various user-interface stuff like the debugger,
454     disassemble and structure print functions. Byte-compile most Hemlock
455     commands.
456 ram 1.12 -- Compile PCL's guts unsafe when #+SMALL.
457     -- Some gratuitous RANDOM tuning. Random double floats are now much, much
458     faster. Added transforms for RANDOM to type-specific functions (which can
459     then be inline-expanded).
460    
461     DEFSTRUCT and classes:
462    
463     The structure representation has been changed to point directly to a type
464     descriptor rather than to the symbol type name. This allows faster type tests
465     and better GC support. Also, structure redefinition is now much more
466     conservative; formerly, many cases where code was compiled using differing
467     versions of the same structure were quietly ignored or resulted in strange
468     behavior. Raw allocation of typed slots dramatically increase the efficiency
469     of float-valued slots. Much of DEFSTRUCT has been rewritten, and is now
470     believed to be ANSI complaint.
471    
472     ANSI changes:
473     -- Default defstruct keyword constructors can no longer reference argument
474     values in slot init forms. BOA constructors can still do this, so defining
475     a BOA constructor with all keyword args will have the old effect.
476     -- Class objects are now implemented, see FIND-CLASS, CLASS-NAME, TYPEP,
477     CLASS-OF. TYPE-OF is now based on CLASS-OF, and returns slightly different
478     results than before.
479     -- STRUCTURE-CLASSes now exist. See also the STRUCTURE-OBJECT type.
480     -- BUILT-IN-CLASSes also exist. In some cases CLASS-OF (legally) returns
481     non-standard subclasses of the standard class, e.g. for a float vector, the
482     result is KERNEL::SIMPLE-ARRAY-SINGLE-FLOAT. STANDARD-CHAR and KEYWORD are
483     now DEFTYPEs.
484    
485     Bug fix:
486     -- Typed structures now have the correct (though rather odd) semantics of
487     :offset and :named when inclusion is done.
488    
489     Raw slots:
490     -- Structure slots of subtypes of SINGLE-FLOAT, DOUBLE-FLOAT and
491     (UNSIGNED-BYTE 32) are now allocated in non-descriptor storage, and can be
492     read/written without number-consing overhead.
493    
494     Type tests:
495 ram 1.13 -- The default (non-frozen) structure type predicate is now significantly
496 ram 1.12 faster (no function call) in the case where the argument is a structure
497     of another type or the type is a supertype of the object's type. The code
498     is also somewhat smaller.
499    
500 ram 1.14 Structure Redefinition:
501 ram 1.12 -- Handing of structure redefinition is now much more comprehensive.
502     -- Definitions are only considered incompatible when slots have moved or been
503     added, slot types are changed to a type that is not a subtype of the old
504     type, or the inheritance structure has changed. Previously any change at
505     all would produce a warning.
506 ram 1.13 -- When a change is incompatible, the default restart (CONTINUE) invalidates
507     old instances, constructors and predicate uses. When speed <= safety, a
508 ram 1.12 LAYOUT-INVALID error will be signalled when obsolete instances are passed
509     to a type test (e.g. for type checking.) Use of old code on new instances
510     or old instances when speed > safety > 0 will result in type errors.
511     Other restarts allow you to ignore the redefinition or to clobber the
512 ram 1.13 existing information, preserving the old code (in case the change is
513     actually compatible.)
514 ram 1.12 -- If the structure length or inheritance structure has changed, an error
515     is signalled when you load code that was compiled with a different
516     structure definition than the one currently in effect.
517    
518 ram 1.14 Structure Internals:
519 ram 1.12 -- VM:STRUCTURE-USAGE renamed to VM:INSTANCE-USAGE. Internally, the structure
520     type and accessors have also been renamed, e.g.
521     STRUCTURE-REF => %INSTANCE-REF.
522     -- The non-standard STRUCTURE type has become has become EXT:INSTANCE. To
523     (portably) test whether something is really a structure object, do
524     (TYPEP X 'STRUCTURE-OBJECT)
525    
526     PCL:
527     The largest changes are:
528     -- PCL port revamped to re-integrate PCL classes with the type system and to
529     more efficiently dispatch on structure and built-in types. Some
530     miscellaneous tuning. CLOS symbols are now exported from the LISP package,
531     so you don't need to USE-PACKAGE PCL anymore.
532    
533     PCL notes:
534    
535 ram 1.14 The integration of PCL with the CMU CL type system has been substantially
536     improved. There are significant improvements in the speed of PCL generic
537     function dispatch of built-in and structure classes and TYPEP of PCL classes.
538     There should also be reduced run-time compilation (e.g. in the Motif
539     inspector) due to less use of non-precompiled dispatch functions.
540 ram 1.12
541 ram 1.14 The compiler now recognizes the PCL::CLASS declaration. This clues the
542     compiler in on PCL's knowledge of types (due to being a specialized argument
543     to a method.) CLOS class names are recognized as "real" types by the
544     compiler, not SATISFIES DEFTYPES. Note that LISP:CLASS is still not a PCL
545     class, so PCL needs to shadow CLASS and STANDARD-CLASS.
546 ram 1.12
547     Fixed the #< print function to flame out if *PRINT-READABLY* is true.
548    
549 ram 1.14 Supply missing :INITIAL-ELEMENT NIL in MAKE-ARRAY call which can result in a
550     "0 is not a list" or "segment violation" error on redefining a class.
551 ram 1.12
552 ram 1.14 September-16-92-PCL-e has been incorporated into the CMU CL sources thanks
553     to Rick Harris. Merge fix to pessimization of GFs with many standard class
554     specializers but also some EQL or built-in class specializers.
555    
556 ram 1.12 Graphical debugger/Motif toolkit:
557    
558     We have implemented a new interface to Motif which is functionally similar to
559     CLM, but works better in CMU CL. See:
560     doc/motif-toolkit.doc
561     doc/motif-internals.doc
562    
563     This motif interface has been used to write a new inspector and graphical
564     debugger. There is also a Lisp control panel with a simple file management
565     facility, apropos and inspector dialogs, and controls for setting global
566     options.
567    
568     Call INTERFACE:LISP-CONTROL-PANEL to create the control panel. When
569     INTERFACE:*INTERFACE-STYLE* is :GRAPHICS (the default) and the DISPLAY
570     environment variable is defined, the graphical inspector and debugger will be
571     invoked by INSPECT or when an error is signalled. Possible values are
572     :GRAPHICS and :TTY. If the value is :GRAPHICS, but there is no X display,
573     then we quietly use the TTY interface.
574    
575     Debugger:
576    
577     The command-line debugger now implements the breakpoint and step commands
578     described in the manual:
579     LIST-LOCATIONS [{function | :c}] list the locations for breakpoints.
580     Specify :c for the current frame. Abbreviation: LL
581     LIST-BREAKPOINTS list the active breakpoints.
582     Abbreviations: LB, LBP
583     DELETE-BREAKPOINT [n] remove breakpoint n or all breakpoints.
584     Abbreviations: DEL, DBP
585     BREAKPOINT {n | :end | :start} [:break form] [:function function]
586     [{:print form}*] [:condition form] set a breakpoint.
587     Abbreviations: BR, BP
588     STEP [n] step to the next location or step n times.
589    
590     These commands provide a degree of support for stepping and setting
591     breakpoints inside compiled functions. The variables
592     DEBUG:*USE-BLOCK-STARTS-ONLY* and DEBUG:*PRINT-CODE-LOCATION-KIND* control the
593     verbosity of LIST-LOCATIONS.
594    
595     Enhancements:
596     -- Changed PRINT-FRAME-CALL to print the source if verbosity >= 2 and
597     the source is available.
598     -- Changed source location printing to cache information so that it is much
599     faster when many locations in the same function are printed. The source
600     file is now only printed when the file changes from one printing to the
601     next.
602    
603     Bug fixes:
604     -- Added explicit error checking to the debugger so that we don't get an
605     internal error (bus error in unsafe code, etc.) when attempting to display
606     source from a file that has been excessively modified.
607     -- Bind *BREAK-ON-SIGNALS* to NIL when we call BREAK in SIGNAL so that the
608     debugger doesn't recurse on itself.
609     -- Changed HANDLE-BREAKPOINT in the debugger to allow breakpoints that nobody
610     wants. This can happen if a function-end breakpoint was deactivated while
611     the function was on the stack, because there is no way to convert the
612     bogus-lra back into the real lra.
613     -- Fixed COMPUTE-CALLING-FRAME to not try using %CODE-DEBUG-INFO on
614     things that arn't code components.
615     -- Instead of doing after breakpoints in Lisp, use the new C function
616     breakpoint_do_displaced_inst. That way the C code can do different things
617     on different machines (like use single stepping if available).
618    
619 ram 1.14
620 ram 1.12 Misc changes:
621    
622     CLX:
623     We are now distributing version R5.01 of the CLX X library. Among other
624     changes, this is supposed to support the cookie-based host authentication
625 ram 1.14 used by OpenWindows. Now compiled with the :CLX-ANSI-COMMON-LISP feature.
626 ram 1.12
627 ram 1.14 Pathnames:
628     -- Logical pathnames are now implemented and wildcard matching has been
629     generalized to make them useful. Any namestring beginning with HOST:
630     (where HOST is a defined logical host) will be parsed as a logical
631     pathname. If the prefix is not a defined logical host, it will be still
632     be parsed as a CMU CL "search list."
633     -- Pattern-matching on :WILD-INFERIORS is now implemented, but the
634     Unix code treats it pretty much like :WILD.
635     -- More error cases are detected in TRANSLATE-PATHNAME.
636     -- See new user's manual for CMU CL specific documentation.
637    
638 ram 1.12 Stream internals:
639     -- Deleted read-line methods. For simplicity, this rather unimportant
640     operation is now implemented using read-char.
641     -- READ-N-BYTES eof-error-p nil is now mostly non-blocking (it only reads what
642     is in the buffer, or what unix-read returns if the buffer is empty.) To be
643     sure it won't block, you must guard it with a LISTEN.
644    
645     Extensions:
646 ram 1.14 -- Changed the stream arg to DISASSEMBLE to be a keyword to avoid optional &
647     keyword lossage.
648 ram 1.12 -- Changed PROFILE:PROFILE argument count determination to parse the function
649     type and look at it, instead of trying to fake it. Among other things,
650     this allows efficient profiling of functions with FTYPE declarations even
651     when compilation policy has caused the function-object's type to be
652     dropped.
653 ram 1.14 -- Add :CALLERS option to PROFILE which records the most common callers
654     of each profiled function.
655     -- Add new "CPROFILE" package which does instruction-counting profiling with
656     the compiler's assistance.
657 ram 1.12 -- Fixed DI:FUNCTION-DEBUG-FUNCTION to work on closures.
658     -- Added EXT:DO-HASH.
659     -- User-defined hashtable tests are now supported. There is a function
660     DEFINE-HASH-TABLE-TEST that takes three arguments: the symbol name of the
661     hash table test, the test function, and the hash function. It updates
662     *hash-table-tests*, which is now internal. The test function takes two
663     objects and returns true iff they are the same. The hash function takes
664     one object and returns two values: the (positive fixnum) hash value and
665     true if the hashing depends on pointer values and will have to be redone if
666     the object moves.
667     -- Added weak hash-table support.
668     - Removed (setf weak-pointer-value) and made make-weak-pointer itself the
669     compiler primitive in order to simplify the gengc port.
670     - Added stuff to fake scavenger hooks in the non-gengc system.
671 ram 1.14 -- Moved the RUN-PROGRAM fork/exec stuff into C, for ease in porting.
672 ram 1.12
673     Hemlock:
674     -- In DELETE-BREAKPOINTS-BUFFER-HOOK, if no wire (server died), then
675     don't do anything.
676     -- Changed BEEP flashing to use SLEEP 0.1 instead of DISPLAY-FINISH-OUTPUT
677     because this was causing recursive entry of CLX.
678 ram 1.14 -- Fixed from debugger edit command "can't edit source" message not
679     spuriously reinvoke the debugger when invoked from the command line.
680     -- Fix initialization of print-representation attribute so that characters
681     >127 don't cause text to mysteriously disappear.
682     -- Flush carefully-add-font-path call. If people want library:fonts/ in
683     their font-path, they can put it there. This should eliminate the Hemlock
684     initialization error which would happen when using X remotely.
685    
686 ram 1.12
687     Changed SAVE-LISP to no longer save the stacks. Instead, when the core is
688     restored, a (supplied) initial function is invoked which can do whatever kind
689     of setup it wants. This makes a saved lisp totally independent of the
690     location of the C stack, and eliminates the "environment too big" error that
691     happened in some SUNOS environments. A consequence of this is that calling
692     SAVE-LISP terminates the currently running Lisp.
693    
694     SunOS/SPARC:
695     Changed software-version to use /usr/bin/uname instead of stringing the
696     kernel.
697    
698     Removed the load of bit-bash, because we don't want to have to support the
699     assemble routine versions.
700    
701     Significant revamping of startup code (lisp now, not ldb.) The new startup
702     code has better breakpoint support and improved portability.
703    
704 ram 1.14 Added :CMU17 to the features list so that PCL can tell if it is in a
705 ram 1.12 version 16 or a version 17 series core.
706    
707    
708 ram 1.11 Release notes for CMU Common Lisp 16f, 11 December 92
709    
710     The changes between 16e and 16f are almost exclusively bug-fixes. When we
711     announce a version 17 beta, 16f will probably become the default release
712     (replacing 15e). The PCL has been upgraded from "March 92 (2a)" to
713     "March 92 (2c)", which provides some bug-fixes; also, all of the patches in
714     the March-92-PCL-bugs file have been applied.
715    
716     Enhancements:
717     -- PROVIDE & REQUIRE are now back in the system, since proposed ANSI CL has
718     reinstated them as deprecated features. See the doc strings for these
719     functions and EXT:DEFMODULE.
720     -- The SPARC dynamic heap size limit has been doubled from 64meg to 128meg.
721    
722     Pretty printer:
723     -- Fixed a bug in pprint-let that caused to to barf on (let (nil) ...).
724     -- Fixed pprint-lambda-list to print a space before the dot when the tail of
725     the lambda list is shared. In other words, print (foo . #1=(bar baz))
726     instead of (foo. #1=(bar baz)).
727     -- Added an additional use of ~^ in pprint-flet so that (flet (nil) ...)
728     doesn't flame out.
729     -- Make pretty printer properly process pprint tabs when output is forced.
730     -- In format pprint logical blocks, fixed ~^ to act like
731     PPRINT-EXIT-IF-LIST-EXHAUSTED instead of blowing out to some containing
732     directive.
733    
734     Compiler:
735     -- Fixed compiler internal error with dead-code deletion of top-level code.
736     -- Bind *gensym-counter* instead of setting it so that compiling doesn't
737     globally reset the gensym counter.
738     -- Fixed problem with interpreted LOAD-TIME-VALUE causing undefined function
739     VALUE-CELL-REF errors.
740     -- Preserve the arglist in interpreted functions for DESCRIBE, etc.
741     -- Gag bound-but-not-referenced warnings when the EXT:INHIBIT-WARNINGS
742     optimize quality is 3.
743     -- Fixed a problem with register allocation conflict analysis which appeared
744     when a function was called with ~>= 50 arguments.
745     -- Fixed bug with optimization of tail local calls.
746     -- Fixed interpreted PROCLAIM/DECLAIM to ignore
747     START-BLOCK, END-BLOCK and declared DECLARATION declarations.
748     Changed the unrecognized proclamation error to be a warning.
749     -- Fixed float heap allocation to not wedge when the store causes a trap
750     (SPARC only.)
751    
752     Trace:
753     -- Added pretty-printer directives so that arg lists and results print better.
754     -- Fixed UNTRACE not to flame out when untracing untraced functions.
755     -- Fixed bug with redefining function traced with encapsulation (e.g.
756     interpreted functions.
757    
758     Misc bug fixes:
759     -- Fixed I/O timeout handling (e.g. for CLX) to correctly borrow from the
760     timeout seconds when computing the new value for the timeout microseconds.
761     -- Restored proper (prompt) handling of queued CLX events in SERVE-EVENT
762     -- Alien enums always take up an int to be compatable with C. Also,
763     sort the from-alist so that enum aliens are unparsed in a canonical
764     format.
765     -- When doing macro destructuring, check to see if some part of a lambda-list
766     is a LIST before checking to see if it is a SYMBOL, because we want NIL to
767     act like the empty list, and not an attempt to bind NIL.
768     -- Fixed PACKAGE-ERROR to have a PACKAGE slot instead of a PATHNAME slot.
769     -- Changed DOLIST not to introduce the spurious let around the result form
770     when there is no result form. Also, just read the var in the spurious
771     let, instead of using IGNORABLE, since the var might be special.
772     -- In complex DEFSETF, don't bother creating temp vars for constants. This
773     is necessary so that keywords stay keywords, and are not changed to
774     gensyms.
775    
776     Enhancements:
777     -- Changed the backquote expanded functions (backq-list, ...) from being
778     inline functions to compiler-macros, since although the optimizer does
779     eventually get the right code, it has to work awful hard. Changed BREAK
780     to accept a condition as well as a format string.
781     -- Exported EXT:CONNECT-TO-UNIX-SOCKET and EXT:CREATE-UNIX-SOCKET, which had
782     been forgotten before. Added code to CONNECT-TO-UNIX-SOCKET so that Unix
783     domain sockets are available for connecting to other processes.
784     -- Removed sys:*task-data* and sys:*task-notify* because they aren't used
785     even under Mach.
786    
787    
788    
789 ram 1.10 Release notes for CMU Common Lisp 16e, 5 August 92
790    
791     16e is primarily a bug-fix release. The main changes from 16d are:
792     -- CLOS support is from March 92 PCL (2a). This is a new version of PCL
793     developed by Richard Harris which incorporates many bug-fixes and ANSI
794     compliance cleanups. He has also back-merged the CMU changes into his
795     sources so that we can release future PCLs without time-consuming merging.
796 ram 1.11 On the downside, there are a couple of new bugs (discrimination on
797     pcl::structure-object doesn't always work; generic functions which contain
798     methods which discriminate on both null and list sometimes do not work).
799     Patches for these bugs are available in March-92-PCL-bugs in the CMU CL
800     release area and by anonymous ftp from host parcftp.xerox.com
801     (13.1.64.94), in the directory pub/pcl/.
802 ram 1.10 -- TRACE has been reimplemented, has a new syntax and new features.
803     -- The hardcopy and info documentation has been updated. Note that it
804     describes some debugger capabilities (breakpoints) which won't appear
805     until version 17.
806    
807     The fasl file format is the same as for 16d, but some code may need to be
808     recompiled. In particular, the expansion of PPRINT-LOGICAL-BLOCK has changed.
809    
810    
811     March 92 PCL highlights: (see notes.text in the sources for details)
812     -- This version of PCL is much closer than previous versions of PCL to the
813     metaobject protocol specified in "The Art of the Metaobject Protocol",
814     chapters 5 and 6, by Gregor Kiczales, Jim des Riveres, and Daniel G.
815     Bobrow.
816     -- You can use structure-class as a metaclass to create new classes.
817     Classes created this way create and evaluate defstruct forms which
818     have generated symbols for the structure accessors and constructor.
819     -- Various optimization of instance variable access, both inside and outside
820     of methods.
821     -- More work (lookups and precompilation) is done at compile and load time,
822     rather than run-time.
823    
824    
825     New TRACE:
826    
827     Trace has been substantially rewritten, and has a new syntax as well as new
828     functionality:
829     -- Tracing of compiled functions is now implemented using breakpoints.
830     Breakpoints destructively modify the code object, causing all calls to the
831     function to be trapped, instead of only those calls that indirect through
832     the symbol. This makes TRACE more useful for debugging programs that use
833     data structures containing function values, since you can now trace
834     anonymous functions and macros. Also, the breakpoint stops the function
835     after the arguments have been parsed, so arguments can accessed by name in
836     the debugger or in TRACE options.
837     -- Depending on the ENCAPSULATE option and DEBUG:*TRACE-ENCAPSULATE-DEFAULT*,
838     encapsulation may be used instead. This is the default for closures,
839     generic functions and interpreted functions.
840     -- TRACE options are no longer set off by extra parens, and you can specify
841     global trace options which affect all functions traced by a particular
842     call to TRACE.
843     -- Conditional breakpoints now work much better than before.
844     -- *DEBUG-PRINT-LEVEL*, -LENGTH* are used instead of a separate
845     *TRACE-PRINT-LEVEL*, etc.
846    
847     Here is the documentation string (see also the hardcopy/info documentation):
848     TRACE {Option Global-Value}* {Name {Option Value}*}*
849     TRACE is a debugging tool that prints information when specified functions
850     are called. In its simplest form:
851     (trace Name-1 Name-2 ...)
852    
853     TRACE causes a printout on *TRACE-OUTPUT* each time that one of the named
854     functions is entered or returns (the Names are not evaluated.) The output
855     is indented according to the number of pending traced calls, and this trace
856     depth is printed at the beginning of each line of output.
857    
858     Options allow modification of the default behavior. Each option is a pair
859     of an option keyword and a value form. Options may be interspersed with
860     function names. Options only affect tracing of the function whose name they
861     appear immediately after. Global options are specified before the first
862     name, and affect all functions traced by a given use of TRACE.
863    
864     The following options are defined:
865    
866     :CONDITION Form
867     :CONDITION-AFTER Form
868     :CONDITION-ALL Form
869     If :CONDITION is specified, then TRACE does nothing unless Form
870     evaluates to true at the time of the call. :CONDITION-AFTER is
871     similar, but suppresses the initial printout, and is tested when the
872     function returns. :CONDITION-ALL tries both before and after.
873    
874     :WHEREIN Names
875     If specified, Names is a function name or list of names. TRACE does
876     nothing unless a call to one of those functions encloses the call to
877     this function (i.e. it would appear in a backtrace.) Anonymous
878     functions have string names like "DEFUN FOO".
879    
880     :BREAK Form
881     :BREAK-AFTER Form
882     :BREAK-ALL Form
883     If specified, and Form evaluates to true, then the debugger is invoked
884     at the start of the function, at the end of the function, or both,
885     according to the respective option.
886    
887     :PRINT Form
888     :PRINT-AFTER Form
889     :PRINT-ALL Form
890     In addition to the usual prinout, he result of evaluating Form is
891     printed at the start of the function, at the end of the function, or
892     both, according to the respective option. Multiple print options cause
893     multiple values to be printed.
894    
895     :FUNCTION Function-Form
896     This is a not really an option, but rather another way of specifying
897     what function to trace. The Function-Form is evaluated immediately,
898     and the resulting function is traced.
899    
900     :ENCAPSULATE {:DEFAULT | T | NIL}
901     If T, the tracing is done via encapsulation (redefining the function
902     name) rather than by modifying the function. :DEFAULT is the default,
903     and means to use encapsulation for interpreted functions and funcallable
904     instances, breakpoints otherwise. When encapsulation is used, forms are
905     *not* evaluated in the function's lexical environment, but DEBUG:ARG can
906     still be used.
907    
908     :CONDITION, :BREAK and :PRINT forms are evaluated in the lexical environment
909     of the called function; DEBUG:VAR and DEBUG:ARG can be used. The -AFTER and
910     -ALL forms are evaluated in the null environment.
911    
912    
913     Assorted bug fixes and enhancements:
914    
915     System code:
916     -- Changed default base file name for LOAD-FOREIGN to be argv[0] rather than
917     being hard-wired to "lisp".
918     -- Fixed a bad declaration which caused garbage collection to fail if more
919     than MOST-POSITIVE-FIXNUM bytes had been consed since process creation.
920     -- Changed GET-INTERNAL-RUN-TIME to use UNIX-FAST-GETRUSAGE to avoid
921     number-consing and generic arithmetic. Also, rearranged the computation
922     so that the time is correctly computed for up to 457 days, instead of only
923     71 minutes.
924     -- Merged Miles' fix to MAKE-PATHNAME so that it knows the difference between
925     an arg being NIL and being unsupplied.
926     -- Some partial fixes to circular printing (the #1=#1# bug).
927     PPRINT-LOGICAL-BLOCK no longer checks the list argument for CAR
928     circularity, now that OUTPUT-OBJECT does it for us.
929     -- Fixed reader dispatch macro characters to be case-insensitive, and to
930     disallow digits as sub-characters.
931     -- Changed #A reader to allow arbitrary sequences instead of just lists.
932     -- RUN-PROGRAM now gives a proper error message when "fork" fails (i.e. too
933 ram 1.11 many processes.)
934     -- Fixed a bug in initialization of saved cores which caused the old
935     environment to be left on the end of EXT:*ENVIRONMENT-LIST*. One symptom
936     was that RUN-PROGRAM would run programs with strange environment values
937     based on those in effect at the time the core was saved. In particular,
938     Lisp subprocesses (i.e. Hemlock slaves) might get the wrong value of
939     CMUCLLIB, which caused the slave to die before connecting.
940 ram 1.10 -- SYSTEM:SERVE-EVENT (and XLIB:EVENT-CASE, etc.) now correctly handle
941     non-integer timeouts. Added declarations to improve the efficiency of
942     event handling.
943     -- Fixed some bugs in UNIX-SELECT which could cause Lisp to hang when more
944     than 32 files were open. Also, improved efficiency in this case.
945     -- Merged Olssons fix to WITH-ENABLED-INTERRUPTS to not try to change
946     interrupt characters anymore.
947     -- A number of bug-fixes for breakpoint support in compiled code (but there
948     are still problems with arbitrary breakpoints.)
949     -- Fixed DI:FRAME-CATCHES
950    
951     CLX:
952     -- Fixed the implementation-dependent pixarray copying routines (for
953     GET-IMAGE, etc.) so that they don't occasionally trash memory, and are
954     actually faster.
955     -- Fixed the definition of the ANGLE type (used by DRAW-ARC, etc.) to work
956     regardless of the kind of real number (single or double float, rational,
957     etc.)
958     -- Fixed several places in image operations where values that could really
959     be negative were declared to be non-negative.
960    
961     Compiler:
962     -- Fixed a bug which caused an internal error whenever a call to random
963     was compiled and the argument type wasn't known to be either a float or
964     an integer.
965     -- Fixed a bug which caused an internal compiler error when a value that
966     wasn't used had an unproven type assertion.
967     -- Fixed some more dead-code deletion bugs.
968     -- Fixed a problem with the new "assignment" optimization of local function
969     call where the compiler could get assertion failures such as tail-sets not
970     being equal.
971     -- Fixed a few places where reoptimization wasn't being triggered when it
972     should have been.
973     -- You can now have a TAGBODY with more than one tag that is non-locally
974     exited to. Evidently this never worked...
975     -- Some changes in debug-info format related to breakpoint support.
976    
977     Misc:
978     -- Fixed some Hemlock Dired commands to know that PATHNAME-DIRECTORY is
979     now a list, not a vector.
980     -- Fixed the bin/sample-wrapper script to use "$@" instead of $* so that
981     arguments are properly passed through.
982    
983    
984 ram 1.9 Release notes for CMU Common Lisp 16d, 30 May 92
985 ram 1.5
986 ram 1.8 16d is our first version 16 general release, and incorporates many changes not
987     present in the 15 series. It is currently fairly close to our current
988     internal development (alpha) systems, and is thus less stable. The major
989     changes are:
990     New Aliens
991     New pathnames
992     New pretty printer
993     New format
994     R5.0 CLX.
995     5/1/90 May Day PCL (REV 4b)
996     Revised manual
997 ram 1.5
998 ram 1.8 The fasl file format is nominally compatible with version 15, but the pathname
999     change affects any pathname constants in fasl files, which includes the
1000     defined-from information present in every fasl file. It is probably a good
1001     idea to recompile everything.
1002 ram 1.7
1003 ram 1.8 CLX and Hemlock are now optional. When CMU CL is installed, the maintainer can
1004     elect not to load CLX and Hemlock -- this saves 7 megabytes of disk and
1005     improves memory usage somewhat. See the installation section of the README
1006     file for details.
1007 ram 1.5
1008 ram 1.8 The ``CMU Common Lisp User's Manual'' has been updated to be more helpful for
1009     non-CMU users. The new manual also documents the new Alien facility for
1010     foreign function calls and data structure access. The manual is now formatted
1011     with Mike Clarkson's LaTeXinfo package, so a consistent version of the
1012     documentation is available online in Gnu info format. See `doc/cmu-user.ps'
1013     and `doc/cmu-user.info'.
1014    
1015 ram 1.5
1016 ram 1.8 General system code:
1017 ram 1.3
1018 ram 1.8 ANSI cleanups:
1019     -- ANSI Compiler macros are now implemented: see COMPILER-MACRO-FUNCTION,
1020     COMPILER-MACROEXPAND, COMPILER-MACROEXPAND-1 and DEFINE-COMPILER-MACRO.
1021     -- Fixed things that invoke *MACROEXPAND-HOOK* to coerce it to a function
1022     before calling it.
1023     -- Fixed MACRO-FUNCTION to take an environment argument.
1024     -- SYMBOL-MACROLET now accepts declarations.
1025     -- SHADOW now accepts strings in addition to symbols.
1026     -- Added UPGRADED-ARRAY-ELEMENT-TYPE and UPGRADED-COMPLEX-PART-TYPE.
1027     -- IGNORABLE is now in the LISP package instead of the EXT package.
1028     -- ADJUST-ARRAY has been updated to allow adjusting of arrays which were
1029     not created with :adjustable non-nil to be adjusted to new dimensions.
1030     -- ADJUSTABLE-ARRAY-P has been updated correspondingly. It returns T if
1031     adjust ADJUST-ARRAY would return an EQ array.
1032     -- The BASE-CHARACTER type has been renamed to BASE-CHAR.
1033     -- The REAL type and REALP function are now implemented.
1034     -- Changed the default structure printer to print slot names as keywords
1035     instead of unqualified symbols.
1036 ram 1.3
1037 ram 1.8 Enhancements:
1038     -- Added MAYBE-INLINE declaration for GET, PUT, etc., so that these
1039     functions can be inline expanded according to the compilation policy.
1040     -- Added some type declarations so that GET-INTERNAL-REAL-TIME doesn't cons.
1041     -- Process the command line before printing the herald so that we can eval
1042     some form and quit without printing anything.
1043     -- SET now protects against setting T, NIL, and keywords. (SETF
1044     SYMBOL-FUNCTION) now expands into FSET, which protects against defining
1045     NIL.
1046     -- Substantially rearranged function describing to make it more consistent,
1047     and added support for describing interpreted functions.
1048     -- PURIFY is now called multiple times during system building to improve
1049     locality.
1050     -- (EVAL-WHEN (EVAL) ...) is now actually eval'ed.
1051 ram 1.3
1052     Bug fixes:
1053 ram 1.8 -- Fixed bug in NTH-VALUE where it expanded into bogus code unless ``n'' was
1054     a constant integer.
1055     -- Fixed FMAKUNBOUND to return the symbol instead of T.
1056     -- Allocate memory as executable so that the OS knows to maintain cache
1057     consistency.
1058     -- Changed DESCRIBE to allow T or NIL as the stream argument.
1059 ram 1.3
1060 ram 1.8 Load enhancements and cleanups:
1061     -- The initial value of *LOAD-VERBOSE* is now T. Additionally, LOAD no
1062     longer always binds *LOAD-VERBOSE* and *LOAD-PRINT*. Now it only
1063     binds them when :VERBOSE or :PRINT are explicity supplied. Therefore, you
1064     can set either of these in your init file and it will take effect.
1065     -- Normally when *LOAD-VERBOSE* is T, only the file name is printed.
1066     Formerly, the loaded stream was always printed, whereas now a stream is
1067     printed only when the stream is not a file stream.
1068     -- Added ANSI features *LOAD-TRUENAME*, *LOAD-PATHNAME* and *LOAD-PRINT*.
1069     -- As per ANSI, bind *READTABLE* to itself to make assignments file-local.
1070     -- Added new variables EXT:*SOURCE-FILE-TYPES* and EXT:*OBJECT-FILE-TYPES*.
1071     When no file type is specified, LOAD tries the types in these lists to
1072     locate the source and object files. LOAD now recognizes source types "l",
1073     "cl" and "lsp" in addition to "lisp".
1074     -- The compiler OPTIMIZE policy is now bound during load, so proclamations in
1075     a file don't leave the global policy clobbered when the load is finished.
1076     -- Changed the :IF-SOURCE-NEWER option to signal an error and use restarts,
1077     rather than PROMPT-FOR-Y-OR-N. Fixed the load source case to actually
1078     load the source, rather than loading the object as a source file...
1079     -- Changed load to deal with source files having NIL type more reasonably.
1080     -- If a wild pathname is given to LOAD, all files matched will be loaded.
1081     -- Proceeding from nonexistent file errors has been improved. It is no longer
1082     assumed that missing files are always source files. Added condition
1083     restarts for missing files.
1084     -- Improved formatting of error and warning messages.
1085 ram 1.3
1086    
1087 ram 1.8 Garbage collection:
1088     -- Changed the minimal ROOM output to include all easily computed information
1089     including whether GC is disabled. The verbose ROOM now conses less.
1090     -- Removed the :ENABLE-GC SAVE-LISP option, as it's no longer needed.
1091     Garbage collection is now correctly enabled in cores which have been saved
1092     and then restarted.
1093     -- Added EXT:BYTES-CONSED-BETWEEN-GCS, a function that returns (and sets when
1094     used with setf) *BYTES-CONSED-BETWEEN-GCS*. Additionally, it changes
1095     *GC-TRIGGER* immediately to reflect the new values of *bytes-consed...*.
1096     -- TIME now displays the GC run-time.
1097     -- Added EXT:*GC-RUN-TIME* with accumulates the INTERNAL-RUN-TIME spent doing
1098     garbage collection. Added declarations to make EXT:GET-BYTES-CONSED more
1099     efficient.
1100     -- The top-level REP loop now zeros the unused non-zero portion of the
1101     control stack to discourage spurious garbage retention.
1102     -- The garbage collector now closes open file streams when it reclaims them.
1103 ram 1.3
1104    
1105 ram 1.8 Packages:
1106     -- The LISP and USER packages have been renamed to COMMON-LISP and
1107     COMMON-LISP-USER. LISP and USER are nicknames, so they can still be used.
1108     -- The LISP package namespace has been cleaned up somewhat. For example,
1109     *DESCRIBE-PRINT-LEVEL* is no longer exported from LISP.
1110     -- The Mach/Unix division in the package system has been clarified a great
1111     deal. Unix specific features have been moved from the MACH package to the
1112     UNIX package. Mach specific features have been left in (or moved to) the
1113     MACH package. For example, all standard Unix syscalls are related
1114     definitions are un UNIX, whereas vm_statistics remains in MACH and GR-CALL
1115     has been moved to MACH.
1116 ram 1.3
1117 ram 1.8 SETF cleanups:
1118     -- Changed GET-SETF-METHOD-MULTIPLE-VALUE to try to macroexpand-1 the form
1119     when it's an atom in case it's a symbol-macro as per the X3J13 cleanup
1120     SYMBOL-MACROLET-SEMANTICS:SPECIAL-FORM. Now you can safely INCF, etc.
1121     symbol macros where the macroexpansion has side effects.
1122     -- Fixed SETF of GETF to evaluate the various parts in the correct order as
1123     per X3J13 cleanup SETF-SUB-METHODS:DELAYED-ACCESS-STORES.
1124     -- X3J13 cleanup SETF-MULTIPLE-STORE-VARIABLES:
1125     Extend the semantics of the macros SETF, PSETF, SHIFTF, ROTATEF, and
1126     ASSERT to allow "places" whose SETF methods have more than one "store
1127     variable". In such cases, the macros accept as many values from the
1128     newvalue form as there are store variables. As usual, extra values
1129     are ignored and missing values default to NIL.
1130     -- Extended the long form of DEFSETF to allow the specification of more
1131     than one "store variable", with the obvious semantics.
1132     -- GET-SETF-METHOD signals an error if there would be more than one
1133     store-variable.
1134 ram 1.3
1135 ram 1.8
1136     Printer:
1137 ram 1.3
1138 ram 1.8 Almost all of the printing code has been rewritten/restructured to support
1139     all of the printing features added to the language. Some highlights:
1140     -- *PRINT-READABLY* is now supported.
1141     -- *PRINT-CIRCLE* works irrespective of *PRINT-PRETTY*. Note: the default
1142     structure printer currently does not work when *PRINT-CIRCLE* is true: you
1143     get #1=#1#.
1144     -- *PRINT-LEVEL* abbreviation now works automatically inside structure
1145     printers.
1146     -- XP has been replaced with a native pretty printer that is fully
1147     integrated with the rest of the system. This Supports the ANSI
1148     pretty-printing interface instead of the old Waters XP interface. Existing
1149     uses of the old interface will need to be updated to use the new names.
1150     -- The pretty-printer now unparses backquote forms on printing. To retain
1151     this information, the backqoute read macro no longer expands into LIST,
1152     CONS, etc. Internal functions are used instead.
1153     -- The macros WITH-STANDARD-IO-SYNTAX and PRINT-UNREADABLE-OBJECT have
1154     been added.
1155     -- All new format. Supports the FORMATTER macro and all the pretty-printing
1156     directives. FORMAT has extended to accept a function as the format control
1157     (as an alternative to a string.)
1158     -- Added support for READTABLE-CASE in symbol printing. Printing when
1159     *PRINT-CASE* is :CAPITALIZE and *PRINT-ESCAPE* is NIL is now slightly
1160     different than before. Added some missing array type declarations in
1161     symbol printing.
1162 ram 1.3
1163     Bug fixes:
1164 ram 1.8 -- Fixed a bug which caused some float printing format directives to
1165     infinitely loop when a fixed-width field overflowed.
1166     -- Specify stream when printing unbound marker.
1167     -- Fixed FORMAT to override printer control variables when printing float
1168     exponents so that they are always printed in decimal, etc.
1169 ram 1.3
1170 ram 1.8
1171     Reader:
1172 ram 1.3
1173 ram 1.8 ANSI Cleanups:
1174     -- *READ-EVAL* is now supported. If a #. is encountered while *READ-EVAL*
1175     is NIL (default T), an error is signaled. This intended to allow
1176     ``secure'' READ-based command interfaces to be written.
1177     -- READTABLE-CASE is now supported.
1178     -- The reader now signals the correct type of error when things go wrong
1179     instead of always signaling a simple-error.
1180     -- Changed the return value of SET-SYNTAX-FROM-CHAR from NIL to T as per X3J13
1181     cleanup RETURN-VALUES-UNSPECIFIED:SPECIFY. [Hard to believe nobody has
1182     complained about not conforming to this one.]
1183 ram 1.3
1184     Bug fixes:
1185 ram 1.8 -- Fixes to several bugs with respect to #+, #-. In particular, stacked
1186     conditionals like "#+foo #-bar baz" now work
1187     -- #n= and #n# now detect more error conditions and work on structures.
1188     -- # is now a non-terminating macro character, so foo#bar is read as a
1189     symbol.
1190     -- Added Ted's changes to make INTERNAL-READ-EXTENDED-TOKEN work when there
1191     are `|' escapes. The main significance of this is that #+nil '|foo;bar|
1192     and #:|foobar| now work properly. Also changed this function to recognize
1193     unquoted colons so that #:foo:bar will error, but not #:foo\:bar.
1194 ram 1.3
1195 ram 1.8 Enhancement:
1196     -- Export new variable *ignore-extra-close-parentheses* if true (the default),
1197     extra close parens are only a warning, not an error. Previously unmatched
1198     close parens were quietly ignored.
1199 ram 1.3
1200    
1201 ram 1.8 Pathnames:
1202 ram 1.2
1203 ram 1.8 This release supports all the new CltL2 pathname features except for logical
1204     pathnames. Following is an overview of the new pathname support.
1205 ram 1.2
1206 ram 1.8 Programs that actually conform to the CLtL1 pathname spec will have very few
1207     problems. However, the CLtL1 spec was extremely vague, and CMU CL did not
1208     make use of much of the allowed flexibility, so many technically non-portable
1209     programs previously worked under CMU CL.
1210 ram 1.2
1211 ram 1.8 The main incompatible changes from CLtL1 to CLtL2:
1212     -- Symbols are no longer acceptable filenames.
1213     -- PATHNAME-HOST may be any object.
1214     -- :UNSPECIFIC is now a legal pathname component.
1215     -- MERGE-PATHNAMES now recognizes relative pathnames and treats them
1216     specially.
1217 ram 1.2
1218 ram 1.8 The format of directories is now specified (to be a list in a certain format.)
1219     This required an incompatible change from the previous practice of using a
1220     vector PATHNAME-DIRECTORY and using "DEFAULT" or :ABSOLUTE in the
1221     PATHNAME-DEVICE to indicate relative and absolute pathnames.
1222 ram 1.2
1223 ram 1.8 In a related change, the CMU SEARCH-LIST extension was changed so that the
1224     search-list now appears in the PATHNAME-DIRECTORY as:
1225     (:ABSOLUTE #<Search-list "name"> ...)
1226 ram 1.2
1227 ram 1.8 Other changes to search-lists:
1228     -- (SETF SEARCH-LIST) now accepts a string or pathname, and converts it into
1229     a one-element list.
1230     -- Search-list elements are now canonicalized to pathnames rather than to
1231     strings.
1232     -- Instead of returning NIL, SEARCH-LIST now signals an error when it is
1233     called on an undefined search list.
1234     -- SEARCH-LIST-DEFINED-P is a predicate that tells if the search list is
1235     currently defined.
1236 ram 1.2
1237 ram 1.8 New features which are now supported:
1238     -- Wildcard pathnames are now fully supported. In addition to allowing :WILD
1239     in any pathname component, "extended wildcards" such as "foo*.*" are also
1240     supported. A consequence of this is that PATTERN objects may appear in
1241     wildcard pathname components instead of strings. See PATHNAME-MATCH-P and
1242     TRANSLATE-PATHNAME.
1243     -- As a CMU CL extension, a wildcard pathname may be used as the argument to
1244     any filesystem interface (like OPEN) as long as it matches only one file.
1245     -- The pathname :COMMON case mechanism provides a way around the problems of
1246     portably specifying string pathname components in the presence of operating
1247     systems with differing preferred case in their filesystem. An uppercase
1248     string "LISP" is mapped to the "customary case" (lowercase on unix.)
1249     Lowercase is also inverted: "readme" becomes "README". Mixed case is left
1250     alone. Note that this mechanism is explicitly enabled by supplying :CASE
1251     :COMMON to functions such as MAKE-PATHNAME. The default is the old
1252     behavior (:CASE :LOCAL).
1253 ram 1.2
1254 ram 1.8 Also, DIRECTORY now actually returns the TRUENAME of each file (as it was
1255     always supposed to do.) If a matched file is a symbolic link, the truename may
1256     be a file in some other directory that doesn't even match the pattern. The old
1257     behavior can be obtained by specifying :FOLLOW-LINKS NIL.
1258 ram 1.2
1259 ram 1.8 The new wildcard pathname mechanism has not yet been used to replace the old
1260     single-wildcard matching in Hemlock DIRED, etc.
1261 ram 1.2
1262 ram 1.8
1263     Debugger:
1264     -- Added Miles' changes to keep errors and warnings on one line if they fit.
1265     -- The debugger now starts up with the error frame as the current frame, so
1266     it is no longer necessary to manually skip over internal frames resulting
1267     from the error system invocation.
1268     -- Fixed some debugger bugs that appeared when debugging interpreted code.
1269     -- Added ``DESCRIBE'' debugger command.
1270     -- Merged Miles' changes that allow the use of restart names as debugger
1271     commands.
1272     -- Changed SHOW-RESTARTS to also display the restart name (but only if it's
1273     not shadowed by a higher priority restart). Changed the restart command
1274     to look for restarts by name if a symbol is typed.
1275     -- Bind *CURRENT-LEVEL* to 0, *PRINT-READABLY* to nil, and *READ-EVAL* to T
1276     when entering the debugger to make sure things print as expected.
1277 ram 1.2
1278 ram 1.8 The debugger programmer (DEBUG-INTERNALS) interface is now documented in the
1279     User's Manual. This interface allows the coding of debuggers and debugger
1280     extensions without requiring an intimate understanding of the compiler and
1281     run-time system. Be warned that DI features (such as breakpoints) not used by
1282     the current debugger may not work very well (wait for version 17.)
1283 ram 1.2
1284 ram 1.8 Debug internals changes:
1285     -- DI:DEBUG-FUNCTION-FUNCTION is now implemented.
1286     -- Added DI:FLUSH-FRAMES-ABOVE for cleaning up frames to be bound to
1287     DEBUG:*STACK-TOP-HINT*.
1288 ram 1.2
1289 ram 1.8
1290     Defstruct:
1291 ram 1.2
1292 ram 1.8 Various fixes and enhancements to defstruct slot parsing and inclusion.
1293     It now works to define structures such as:
1294     (defstruct super a)
1295     (defstruct (sub1 (:conc-name super)) one)
1296     (defstruct (sub2 (:conc-name super)) two)
1297     (super-a (make-sub1))
1298 ram 1.2
1299 ram 1.8 previously, a definition such as for SUB2 would define SUPER-A to be a
1300     SUB2-specific function, which could then no longer be used on other types. The
1301     spec doesn't clearly say that such a construct is legal, but its use seems
1302     fairly common.
1303 ram 1.2
1304 ram 1.8 Also, slot parsing is now more rigorous. Unrecognized slot options cause an
1305     error, as does a slot spec like: (defstruct foo (a :type t))
1306 ram 1.2
1307 ram 1.8 Fasl dumping of constant structures has been fixed to conform to X3J13. The
1308     main significance of this is that DEFSTRUCT structures are no longer dumpable
1309     by default. However, the generic function MAKE-LOAD-FORM isn't really used.
1310     Instead, a new defstruct option, :MAKE-LOAD-FORM-FUN, has been added that can
1311     be used to specify a function that acts like a MAKE-LOAD-FORM method. When we
1312     have a CLOS that supports STRUCTURE-CLASS, the default method for
1313     MAKE-LOAD-FORM will use this information instead of having the compiler use it
1314     directly. The old behavior can be enabled on a structure by structure basis by
1315     using the :MAKE-LOAD-FORM-FUN defstruct option:
1316     (defstruct (foo (:make-load-form-fun :just-dump-it-normally))
1317     ...)
1318 ram 1.2
1319    
1320 ram 1.8 Compiler:
1321 ram 1.1
1322 ram 1.8 Cleanups:
1323     -- Added the LOAD-TIME-VALUE support special form.
1324     -- Displaced or adjustable arrays and vectors with fill pointers can now be
1325     dumped in fasl files, but are converted to simple array with the same
1326     elements.
1327     -- Arrays of floats are left as arrays of floats instead of being
1328     converted into arrays of element-type T that just so happen to hold a
1329     bunch of floats.
1330     -- Changed IGNORE and IGNORABLE to recognize #'fn-name for declaring that
1331     local functions are not used. Exported IGNORABLE from LISP.
1332 ram 1.1
1333 ram 1.8 New optimizations:
1334     -- Iterations written using tail recursion are now optimized through a
1335     special-casing of local functions where all calls but one are
1336     tail-recursive self-calls. Such functions are compiled with no
1337     environment manipulation, resulting in the same code as explicit
1338     iteration.
1339     -- Loop rotation (Knuth "while" loop optimization) been added. This is the
1340     optimization that negates the loop exit test and places it at the end of
1341     the loop, and then jumps there at loop entry. Note that this is part of
1342     control optimization, and not simply a recoding of certain iteration
1343     macros. In fact, for historical reasons DO, etc. already had the exit
1344     test negated, but the compiler was cleverly un-negating the test.
1345     -- Flow analysis now recognizes function calls and special forms which do
1346     not yield any value because they unwind or signal an error. This results
1347     in improved code for error checks, since the compiler can get by with
1348     fewer unconditional branches. A function can be declared not to return by
1349     declaring its result type to be NIL (not to be confused with NULL). If a
1350     function declared NIL does return, an error will be signalled.
1351     -- Added derive-type methods for ASIN, ACOS, ACOSH, ATANH and SQRT which
1352     figure out whether the result type is real on the basis of the argument
1353     range. Also, the result of ATAN is always real, so we don't need a result
1354     type assertion.
1355     -- Added optimization which deletes MULTIPLE-VALUE-BINDs when all
1356     variables have been deleted.
1357     -- Eliminated some spurious checking of the result types of safe VOPs (such
1358     as the SPARC tadd for fixnum arithmetic.)
1359     -- Transform uses of the SEARCH generic sequence function on simple strings
1360     into a call to a more efficient string-specific function.
1361     -- Added multiplier recoding of (UNSIGNED-BYTE 32) multiplication. This
1362     converts 32 bit (or smaller) unsigned multiplication by any compile-time
1363     constant into a shift-add sequence. This is much faster when the constant
1364     is a near power of two or when general multiplication is slow (as on the
1365     SPARC.)
1366     -- Added comprehensive handling of arithmetic and logical identities when
1367     an arg is -1, 0 or +1.
1368     -- Added a RANDOM derive-type method: (random 13) is (integer 0 12).
1369 ram 1.1
1370    
1371     Enhancements:
1372 ram 1.8 -- Changed the compiler to temporarily increase *BYTES-CONSED-
1373     BETWEEN-GCS* by a factor of 4 during compilation of each top-level form,
1374     instead of turning off all garbage collection.
1375     -- Bind *PRINT-LINES* around compiler error output to
1376     *ERROR-PRINT-LINES*.
1377     -- Do not warn about undefined variables, functions or types when the
1378     INHIBIT-WARNINGS OPTIMIZE quality is 3.
1379     -- Some optimizations are now considered "important"; failure of important
1380     optimizations causes an efficiency note even when speed=inhibit-warnings
1381     (i.e. by default.)
1382     -- Print a error summary even when *COMPILE-VERBOSE* is false. (This is only
1383     printed when there are errors, so this doesn't seem a violation of the
1384     spirit of the spec.)
1385 ram 1.1
1386     Bug fixes:
1387 ram 1.8 -- Merged Miles' fix to disassembly of the MIPS coprocessor move instructions.
1388     -- Fixed spelling of "efficency" in exported variables such as
1389     *EFFICIENCY-NOTE-COST-THRESHOLD*
1390     -- Fixed some cases where incomplete optimization could happen.
1391     -- Fixed some arithmetic "identities" that failed to preserve the sign of
1392     -0.0.
1393     -- Fixed TYPES-INTERSECT to consider any supertype of T to definitely
1394     intersect with anything (even an unknown type.)
1395     -- Fixed a problem where inconsistent declarations could fail to be detected
1396     at compile time.
1397     -- Fixed the VALUES transform (which discards unused subforms) to work
1398     on (VALUES).
1399     -- More bug fixes to dead code deletion.
1400     -- Fixed a problem where a special binding would not be removed on exit from
1401     the scope if there was no code in the scope (e.g. it had all been
1402     deleted.)
1403     -- Fixed handling of named (DEFCONSTANT) constants so that EQ
1404     relationships are properly preserved.
1405 ram 1.1
1406 ram 1.8
1407     Extensions:
1408 ram 1.1
1409 ram 1.8 -- Export FEATUREP from EXT. This takes a feature expression and tests it
1410     against the value of *FEATURES*. Allow LISP:AND, LISP:OR, and LISP:NOT in
1411     features lists in addition to :AND, :OR, and :NOT. This makes featurep
1412     useful outside of #+ and #-.
1413     -- The encapsulation mechanism (similar to advise facilities) has been
1414     revamped to work on SETF function names as well as symbols.
1415     EXT:ENCAPSULATED-DEFINITION
1416     Returns whatever definition is stored for name, regardless of whether
1417     it is encapsulated. Unlike FDEFINITION, this does not strip off the
1418     encapsulation. This is SETF'able.
1419     EXT:ENCAPSULATE
1420     Replaces the definition of name with a function that binds name's
1421     arguments a variable named argument-list, binds name's definition to a
1422     variable named basic-definition, and EVAL's body in that context. Type
1423     is whatever you would like to associate with this encapsulation for
1424     identification in case you need multiple encapsuations of the same
1425     name.
1426     EXT:UNENCAPSULATE
1427     Removes name's most recent encapsulation of the specified type.
1428     EXT:ENCAPSULATED-P
1429     Returns t if name has an encapsulation of the given type, otherwise
1430     nil.
1431     EXT:*SETF-FDEFINITION-HOOK*
1432     A list of functions invoked by (SETF FDEFINITION) before storing the
1433     new value. Each hook function must take the function name and the
1434     new-value.
1435 ram 1.1
1436     Hemlock:
1437 ram 1.8 -- Fixed the :FILE branch of "Help on Parse" to trim leading directory
1438     components off the pathname if it wouldn't otherwise fit on the screen.
1439     -- Fixed GET-EDITOR-TTY-INPUT to not assume that UNIX-READ will always work.
1440     -- When we reallocate string table vectors to grow them, clear the old vector
1441     so that it won't hold onto garbage (in case the vector was in static space,
1442     but pointed to dynamic values.) This was a major cause of memory leakage
1443     in Hemlock.
1444     -- Added a (setf (ts-stream-char-pos stream) 0) to the accept-input function
1445     so that char-pos will be reset to zero whenever the user presses enter.
1446 ram 1.1
1447 ram 1.8 PCL:
1448     -- The version has been updated to "5/1/90 May Day PCL (REV 4b)".
1449     -- The Code walker now understands the real SYMBOL-MACROLET, and the PCL macro
1450     definition is no longer used.
1451     -- Fixed a bug in WALK-ARGLIST where it would ignore the rest of the current
1452     arglist if the current arg destructured. This was causing it to compile
1453     forms like:
1454     (macrolet ((foo ((a b) c) ...)) ...)
1455     as:
1456     (macrolet ((foo ((a b)) ...)) ...)
1457     note the loss of the arg c.
1458 ram 1.1
1459 ram 1.8
1460     System:
1461 ram 1.1
1462 ram 1.8 -- All the SAP-REF-<n> functions now take byte offsets. Previously, the
1463     16 and 32bit versions were scaled by the element size.
1464     -- Fixed UNIX-IOCTL to not flame out of the cmd is a ub-32 instead of a sb-32.
1465     -- Added Miles' TCSETPGRP, TCGETPGRP, and TTY-PROCESS-GROUP.
1466     -- Unix syscalls are now more restrictive in the kind of arguments that they
1467     accept. In particular, UNIX:UNIX-READ, etc., no longer automatically
1468     accept a vector (or string) argument. You must use VECTOR-SAP to convert
1469     the vector to a system area pointer. Note that WITHOUT-GCING should be
1470     wrapped around any syscall which is passed a pointer to the Lisp heap,
1471     since the object might otherwise move doing the syscall.
1472     -- Changed LOAD-FOREIGN to be exported from ALIEN. Changed it have keyword
1473     args instead of optionals. Deleted obsolete linker argument.

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