937 lines (910 with data), 54.0 kB
changes in sbcl-0.6.0 relative to sbcl-0.5.0:
* tidied up "make.sh" script
* tidied up system directory structure
* better "clean.sh" behavior
* added doc/FOR-CMUCL-DEVELOPERS
* many many small tweaks to output format, e.g. removing possibly-confusing
trailing #\. character in DESCRIBE-INSTANCE
* (EQUALP #\A 'A) no longer signals an error.
* new hashing code, including EQUALP hashing
* tidied up Lisp initialization and toplevel
* initialization files (e.g. /etc/sbclrc and $HOME/.sbclrc)
* command line argument processing
* added POSIX-GETENV function to deal with Unix-ish environment variables
* more-Unixy handling of *STANDARD-INPUT* and other Lisp streams, e.g.
terminating SBCL on EOF
* non-verbose GC by default
* There is no more "sbcl" shell script; the sbcl file is now the C
runtime executable (just like CMU CL).
* removed some unused fops, e.g. FOP-UNIFORM-VECTOR, FOP-CHARACTER, and
* tweaked debug-info.lisp and debug-int.lisp to make the debugger store
symbol and package information as Lisp native symbol and package objects
instead of strings naming symbols and strings naming packages. This way,
whenever packages are renamed (as in warm init), debug information is
transformed along with everything else.
* tweaked the optimization policy declarations which control the building
of SBCL itself. Now, among other things, the system no longer saves
source location debugging information. (This helps two problems at once
by reducing SBCL size and by keeping SBCL from trying to look for its
sources -- which may not exist -- when reporting errors.)
* added src/cold/chill.lisp, to let SBCL read its own cold sources for
debugging and testing purposes
* cleaned up printing, making the printer call PRINT-OBJECT for
instances, and using PRINT-UNREADABLE-OBJECT for most PRINT-OBJECT
methods, giving nearly-ANSI behavior
* converted almost all special variables to use *FOO* naming convention
* deleted PARSE-TIME functionality, since it can be done portably
* moved some files out of cold init into warm init
* deleted DEFUN UNDEFINED-VALUE, replaced (UNDEFINED-VALUE) forms
with (VALUES) forms
* regularized formatting of source files
* added an install.sh script
* fixed ridiculous memory usage of cross-compiler by making
compiler/alloc.lisp not try to do pooling unless it can hook
itself into the GC of the cross-compilation host. Now the system
builds nicely on my old laptop.
* added :SB-ALLOC in target-features.lisp-expr
* deleted mention of :ANSI-DOC from target-features.lisp-expr (since it
was not implemented)
* re-did condition handling and note reporting in the compiler. Notes
are no longer handled by signalling conditions. Style warnings
and warnings are handled more correctly and reported in such a way
that it's easy to find one or the other in your output (so that you
can e.g. figure out which of many problems caused COMPILE-FILE to
* changed the severity of several compiler warnings from full WARNING
to STYLE-WARNING in order to conform with the ANSI spec; also changed
compiler note reporting so that it doesn't use the condition system
at all (and hence affects neither FAILURE-P nor WARNINGS-P in the
* made PROCLAIM and DECLAIM conform to ANSI. PROCLAIM is now an ordinary
function. As a consequence, START-BLOCK and END-BLOCK declarations are
no longer supported, since their implementation was deeply intertwingled
with the magical, non-ANSI treatment that PROCLAIM received in CMU CL.
* removed bogus "support" for compiler macros named (SETF FOO), and
removed the compiler macro for SETF INFO (but only after making a fool
of myself on the cmucl-imp mailing list by posting a bogus patch for
* Compiled files containing forms which have side effects on the Lisp
reader (such as DEFPACKAGE forms) are now handled more correctly.
(Compiler queuing of top level lambdas has been suppressed by setting
*TOP-LEVEL-LAMBDA-MAX* to 0. )
* deleted various currently-unused source files, e.g. gengc.lisp. They
may be added back at some point e.g. when porting to other architectures,
but until they are it's distracting to distribute them and to try to
* deleted "UNCROSS couldn't recurse through.." style warnings, since
there were so many of them they're just distractions, and UNCROSS is
known to be able to handle the current sources
* moved PROFILE functionality into TRACE, so that it will be clear
how the wrapping and unwrapping of functions when you profile them
interacts with the wrapping and unwrapping of functions when you
trace them. (Actually, the functionality isn't there yet, but at least
the interface specification is there. Hopefully, the functionality will
arrive with some future maintenance release.)
* removed host-oops.lisp
* changed signature of QUIT function to allow UNIX-CODE argument
* fixed READ-SEQUENCE bug
* tweaked verbose GC output so that it looks more like the progress
output that ANSI specifies for functions like LOAD
* set up the system on sourceforge.com, with home pages, mailing lists, etc.
* added <http://sbcl.sourceforge.com> to the banner information printed by
the sbcl executable
changes in sbcl-0.6.1 relative to sbcl-0.6.0:
* changed build optimization from (SAFETY 1) to (SAFETY 3) as a short-term
fix for various type-unsafety bugs, e.g. failures with (LENGTH 123) and
(MAKE-LIST -1). In the longer term, it ought to become true
that declarations are assertions even at SAFETY 1. For now, it's not
quite true even at SAFETY 3, but it's at least more nearly true..
(Note that this change seems to increases the size of the system by
O(5%) and to decrease the speed of the compiler by 20% or more.)
* changed ALIEN printing to be much more abbreviated, as a short-term fix
for the problem of printing dozens of lines of distracting information
about low-level system machinery as part of the top stack frame
on entry to the debugger when an undefined function was called.
* tweaked the debugger's use of WITH-STANDARD-IO-SYNTAX so that *PACKAGE*
is not reset to COMMON-LISP-USER.
* Compilation of stuff related to dyncount.lisp has been made conditional
on the :SB-DYNCOUNT target feature, so that the ordinary core system is
smaller. The various dyncount-related symbols have been moved into
a new "SB-DYNCOUNT" package.
* tty-inspect.lisp has been renamed to inspect.lisp.
* unix-glibc2.lisp has been renamed to unix.lisp, and the :GLIBC2
feature has gone away. (When we eventually port to other flavors of
libc and/or Unix, we'll try to make the differences between flavors
invisible at the user level.)
* Various other *FEATURES* tags, and/or their associated conditionals,
have been removed if obsolescent, or given better documentation, or
sometimes given more-mnemonic names.
changes in sbcl-0.6.2 relative to sbcl-0.6.1:
* (Note that the way that the PCL macroexpansions were rewritten
to accommodate the change in DEFGENERIC below breaks binary
compatibility. That is, fasl files compiled under sbcl-0.6.1 may
not run under sbcl-0.6.2. Once we get out of alpha releases,
i.e. hit release 1.0.0, we'll probably try to maintain binary
compatibility between maintenance releases, e.g. between sbcl-1.4.3
and sbcl-1.4.4. Until then, however, it might be fairly common
for maintenance releases to break binary compatibility.)
* A bug in the calculation of WARNINGS-P and FAILURE-P in COMPILE-FILE
has been fixed.
* The reporting of unhandled signals has been changed to print some
explanatory text as well as the report form. (Previously only
the report form was printed.)
* The macroexpansion for DEFGENERIC now DECLAIMs the function that
it defines, so that the compiler no longer issues undefined function
warnings for compiled-but-not-yet-loaded generic functions.
* The CLTL-style "LISP" and "USER" nicknames for the "COMMON-LISP"
and "COMMON-LISP-USER" packages have been removed. Now only the "CL"
and "CL-USER" standard nicknames from the "11.1.2 Standardized Packages"
section of the ANSI spec are supported.
* The "" nickname for the "KEYWORD" package has been removed.
The reader still handles symbol tokens which begin with a package marker
as keywords, but it doesn't expose its mechanism for doing so in the
(PACKAGE-NICKNAMES (FIND-PACKAGE "KEYWORD")) list.
* The system now issues STYLE-WARNINGs for contradictory TYPE
proclamations. (Warnings for contradictory FTYPE proclamations would
be nice too, but those can't be done usefully unless the type system
is made smarter about FUNCTION types.)
* The names of source files "*host-*.lisp" and "*target-*.lisp" have been
systematized, so that "*target-*.lisp is supposed to exist only on the
target and imply that there's a related file which exists on the
host, and *host-*.lisp is supposed to exist only on the host and imply
that there's a related file which exists on the target. This involves a
lot of renaming. Hopefully the acute confusion caused by the renaming
will be justified by the reduction in chronic confusion..
** runtime-type.lisp -> early-target-type.lisp
** target-type.lisp -> late-target-type.lisp
** early-host-format.lisp -> early-format.lisp
** late-host-format.lisp -> late-format.lisp
** host-error.lisp -> misc-error.lisp
** early-error.lisp -> early-target-error.lisp
** late-error.lisp -> late-target-error.lisp
** host-defboot.lisp -> early-defboot.lisp
** code/misc.lisp -> code/target-misc.lisp
** code/host-misc.lisp -> code/misc.lisp
** code/numbers.lisp -> code/target-numbers.lisp
** code/early-numbers.lisp -> numbers.lisp
** early-host-type.lisp -> early-type.lisp
** late-host-type.lisp -> late-type.lisp
** host-typep.lisp -> typep.lisp
** load.lisp -> target-load.lisp
** host-load.lisp -> load.lisp
** host-disassem.lisp -> disassem.lisp
** host-insts.lisp -> insts.lisp
** byte-comp.lisp -> target-byte-comp.lisp
** host-byte-comp.lisp -> byte-comp.lisp
** host-signal.lisp -> signal.lisp
** host-defstruct.lisp -> defstruct.lisp
** late-target-type.lisp -> deftypes-for-target.lisp
Furthermore, several other previously target-only files foo.lisp (e.g.
hash-table.lisp and random.lisp) have been split into a target-and-host
foo.lisp file and a target-only target-foo.lisp file, with their key type
definitions in the target-and-host part, so that the cross-compiler will
know more about target types.
* DEFSTRUCT BACKEND, and the BACKEND-valued *BACKEND* variable, have
gone away. In their place are various *BACKEND-FOO* variables
corresponding to the slots of the old structure.
* A bug which caused the SB-COLD bootstrap-time package to be propagated
into the target SBCL has been fixed.
* The chill.lisp system for loading cold code into a running SBCL
now works better.
* Support for the CMU CL "scavenger hook" extension has been removed.
(It was undocumented and unused in the CMU CL sources that SBCL was
derived from, and stale in sbcl-0.6.1.)
* Various errors in the cross-compiler type system were detected
by running the cross-compiler with *TYPE-SYSTEM-INITIALIZED*
(enabling various consistency checks). Many of them were fixed,
but some hard problems remain, so the compiler is back to
running without *TYPE-SYSTEM-INITIALIZED* for now.
* As part of the cross-compiler type system cleanup, I implemented
DEF!TYPE and got rid of early-ugly-duplicates.lisp.
* I have started adding UNCROSS calls throughout the type system
and the INFO database. (Thus perhaps eventually the blanket UNCROSS
on cross-compiler input files will be able to go away, and various
kludges with it).
* CONSTANTP now returns true for quoted forms (as explicitly required
by the ANSI spec).
changes in sbcl-0.6.3 relative to sbcl-0.6.2:
* The system still can't cross-compile itself with
*TYPE-SYSTEM-INITIALIZED* (and all the consistency checks that
entails), but at least it can compile more of itself that way
than it used to be able to, and various buglets which were uncovered
by trying to cross-compile itself that way have now been fixed.
* This release breaks binary compatibility again. This time
at least I've incremented the FASL file format version to 2, so that the
problem can be detected reliably instead of just causing weird errors.
* various new style warnings:
** using DEFUN, DEFMETHOD, or DEFGENERIC to overwrite an old definition
** using the deprecated EVAL/LOAD/COMPILE situation names in EVAL-WHEN
** using the lexical binding of a variable named in the *FOO* style
* DESCRIBE has been substantially rewritten. It now calls DESCRIBE-OBJECT
as specified by ANSI.
* *RANDOM-STATE* is no longer automatically initialized from
(GET-UNIVERSAL-TIME), but instead from a constant seed. Thus, the
default behavior of the system is to repeat its behavior every time
it's run. If you'd like to change this behavior, you can always
explicitly set the seed from (GET-UNIVERSAL-TIME); whereas under the
old convention there was no comparably easy way to get the system to
repeat its behavior every time it was run.
* Support for the pre-CLTL2 interpretation of FUNCTION declarations as
FTYPE declarations has been removed, in favor of their ANSI
interpretation as TYPE FUNCTION declarations. (See p. 228 of CLTL2.)
* The quantifiers SOME, EVERY, NOTANY, and NOTEVERY no longer cons when
the types of their sequence arguments can be determined at compile time.
This is done through a new open code expansion for MAP which eliminates
consing for (MAP NIL ..), and reduces consing otherwise, when sequence
argument types can be determined at compile time.
* The optimizer now transforms COERCE into an identity operation when it
can prove that the coerced object is already of the correct type. (This
can be a win for machine generated code, including the output of other
optimization transforms, such as the MAP transform above.)
* Credit information has been moved from source file headers into CREDITS.
* Source file headers have been made more standard.
* The CASE macro now compiles without complaining even when it has
changes in sbcl-0.6.4 relative to sbcl-0.6.3:
* There is now a partial SBCL user manual (with some new text and some
text cribbed from the CMU CL manual).
* The beginnings of a profiler have been added (starting with the
CMU CL profiler and simplifying and cleaning up). Eventually the
main interface should be through the TRACE macro, but for now,
it's still accessed through vaguely CMU-CL-style functions and macros
exported from the package SB-PROFILE.
* Some problems left over from porting CMU CL to the new
cross-compilation bootstrap process have been cleaned up:
** DISASSEMBLE now works. (There was a problem in using DEFMACRO
instead of SB!XC:DEFMACRO, compounded by an oversight on my
part when getting rid of the compiler *BACKEND* stuff.)
** The value of *NULL-TYPE* was screwed up, because it was
being initialized before the type system knew the final
definition of the 'NULL type. This screwed up several key
optimizations in the compiler, causing inefficiency in all sorts
of places. (I found it because I wanted to understand why
GET-INTERNAL-RUN-TIME was consing.)
* fixed a bug in DEFGENERIC which was causing it to overwrite preexisting
PROCLAIM FTYPE information. Unfortunately this broke binary
compatibility again, since now the forms output by DEFGENERIC
to refer to functions which didn't exist in 0.6.3.
* added declarations so that SB-PCL::USE-CACHING-DFUN-P
can use the new (as of 0.6.3) transform for SOME into MAP into
* changed (MOD 1000000) type declarations for Linux timeval.tv_usec slot
values to (INTEGER 0 1000000), so that the time code will no longer
occasionally get blown up by Linux returning 1000000 microseconds
* PRINT-UNREADABLE-OBJECT has been tweaked to make the spacing of
its output conform to the ANSI spec. (Alas, this makes its output
uglier in the :TYPE T :IDENTITY NIL case, but them's the breaks.)
* A full call to MAP NIL with a single sequence argument no longer conses.
* fixes to problems pointed out by Martin Atzmueller:
* The manual page no longer talks about multiprocessing as though
it were currently supported.
* The ILISP support patches have been removed from the distribution,
because as of version 5.10.1, ILISP now supports SBCL without us
having to maintain patches.
* added a modified version of Raymond Toy's recent CMU CL patch for
EQUALP comparison of HASH-TABLE
changes in sbcl-0.6.5 relative to sbcl-0.6.4:
* Raymond Wiker's patches to port the system to FreeBSD have been merged.
* The build process now looks for GNU make under the default name "gmake",
instead of "make" as it used to. If GNU make is not available as "gmake"
on your system, you can change this default behavior by setting the
GNUMAKE environment variable.
* Replace #+SB-DOC with #!+SB-DOC in seq.lisp so that the system
can build without error under CMU CL.
changes in sbcl-0.6.6 relative to sbcl-0.6.5:
* DESCRIBE no longer tries to call itself recursively to describe
bound/fbound values, so that it no longer fails on symbols which are
bound to themselves (like keywords, T, and NIL).
* DESCRIBE now works on generic functions.
* The printer now prints less-screwed-up representations of closures
(not naively trying to bogusly use the %FUNCTION-NAME accessor on them).
* A private symbol is used instead of the :EMPTY keyword previously
used to mark empty slots in hash tables. Thus
(DEFVAR *HT* (MAKE-HASH-TABLE))
(SETF (GETHASH :EMPTY *HT*) :EMPTY)
(MAPHASH (LAMBDA (K V) (FORMAT T "~&~S ~S~%" K V)))
now does what ANSI says that it should. (You can still get
similar noncompliant behavior if bang on the hash table
implementation with all the symbols you get back from
DO-ALL-SYMBOLS, but at least that's a little harder to do.)
This breaks binary compatibility, since tests for equality to
:EMPTY are wired into things like the macroexpansion of
WITH-HASH-TABLE-ITERATOR in FASL files produced by earlier
* There's now a minimal placeholder implementation for CL:STEP,
as required by ANSI.
* An obscure bug in the interaction of the normal compiler, the byte
compiler, inlining, and structure predicates has been patched
by setting the flags for the DEFTRANSFORM of %INSTANCE-TYPEP as
:WHEN :BOTH (as per Raymond Toy's suggestion on the email@example.com
* Missing ordinary arguments in a macro call are now detected even
when the macro lambda list contains &KEY or &REST.
* The debugger no longer complains about encountering the top of the
stack when you type "FRAME 0" to explicitly instruct it to go to
the top of the stack. And it now prints the frame you request even
if it's the current frame (instead of saying "You are here.").
* As specified by ANSI, the system now always prints keywords
as #\: followed by SYMBOL-NAME, even when *PACKAGE* is the
* The default initial SIZE of HASH-TABLEs is now smaller.
* Type information from CLOS class dispatch is now propagated
into DEFMETHOD bodies, so that e.g.
(DEFMETHOD FOO ((X SINGLE-FLOAT))
(+ X 123.0))
is now basically equivalent to
(DEFMETHOD FOO ((X SINGLE-FLOAT))
(DECLARE (TYPE SINGLE-FLOAT X))
(+ X 123.0))
and the compiler can compile (+ X 123.0) as a SINGLE-FLOAT-only
operation, without having to do run-time type dispatch.
* The macroexpansion of DEFMETHOD has been tweaked so that it has
reasonable behavior when arguments are declared IGNORE or IGNORABLE.
* Since I don't seem to be making big file reorganizations very often
any more (and since my archive of sbcl-x.y.zv.tar.bz2 snapshots
is overflowing my ability to conveniently back them up), I've finally
checked the system into CVS. (The CVS repository is on my home system,
not at SourceForge -- putting it on SourceForge might come later.)
* SB-EXT:*GC-NOTIFY-STREAM* has been added, to control where the
high-level GC-NOTIFY-FOO functions send their output. (There's
still very little control of where low-level verbose GC functions
send their output.) The SB-EXT:*GC-VERBOSE* variable now controls
less than it used to -- the GC-NOTIFY-FOO functions are now under
the control of *GC-NOTIFY-STREAM*, not *GC-VERBOSE*.
* The system now stores the version string (LISP-IMPLEMENTATION-VERSION)
in only one place in the source code, and propagates it automatically
everywhere that it's needed. Thus e.g. when I bump the version from
0.6.6 to 0.6.7, I'll only need to modify the sources in one place.
* The C source files now include boilerplate legalese and documentation
at the head of each file (just as the Lisp source files already did).
* At Dan Barlow's suggestion, the hyperlink from the SBCL website
to his page will be replaced with a link to his new CLiki service.
changes in sbcl-0.6.7 relative to sbcl-0.6.6:
* The system has been ported to OpenBSD.
* The system now compiles with a simple "sh make.sh" on the systems
that it's supported on. I.e., now you no longer need to tweak
text in the target-features.lisp-expr and symlinks in src/runtime/
by hand, the make.sh takes care of it for you.
* The system is no longer so grossly inefficient when compiling code
involving vectors implemented as general (not simple) vectors (VECTOR T),
so code which dares to use VECTOR-PUSH-EXTEND and FILL-POINTER, or
which dares to use the various sequence functions on non-simple
vectors, takes less of a performance hit.
* There is now a primitive type predicate VECTOR-T-P
to test for the (VECTOR T) type, so that e.g.
(DEFUN FOO (V) (DECLARE (TYPE (VECTOR T) V)) (AREF V 3))
can now be compiled with some semblance of efficiency. (The old code
turned the type declaration into a full call to %TYPEP at runtime!)
* AREF on (VECTOR T) is still not fast, since it's still compiled
as a full call to SB-KERNEL:DATA-VECTOR-REF, but at least the
ETYPECASE used in DATA-VECTOR-REF is now compiled reasonably
efficiently. (The old version made full calls to SUBTYPEP at runtime!)
* (MAKE-ARRAY 12 :FILL-POINTER T) is now executed less inefficiently,
without making full calls to SUBTYPEP at runtime.
(Some analogous efficiency issues for non-simple vectors specialized to
element types other than T, or for non-simple multidimensional arrays,
have not been addressed. They could almost certainly be handled the
same way if anyone is motivated to do so.)
* The changes in array handling break binary compatibility, so
*BACKEND-FASL-FILE-VERSION* has been bumped to 4.
* (TYPEP (MAKE-ARRAY 12 :FILL-POINTER 4) 'VECTOR) now returns (VALUES T)
instead of (VALUES T T).
* By following the instructions that Dan Barlow posted to sbcl-devel
on 2 July 2000, I was able to enable primitive dynamic object
file loading code for Linux. The full-blown CMU CL LOAD-FOREIGN
functionality is not implemented (since it calls ld to resolve
library references automatically, requiring RUN-PROGRAM for its
implementation), but a simpler SB-EXT:LOAD-1-FOREIGN (which doesn't
try to resolve library references) is now supported.
* The system now flushes the standard output streams when it terminates,
unless QUIT is used with the RECKLESSLY-P option set. It also flushes
them at several other probably-convenient times, e.g. in each pass of
the toplevel read-eval-print loop, and after evaluating a form given
as an "--eval" command-line option. (These changes were motivated by a
discussion of stream flushing issues on cmucl-imp in August 2000.)
* The source transform for TYPEP of array types no longer assumes
that an array whose element type is a not-yet-defined type
is implemented as an array of T, but instead punts, so that the
type will be interpreted at runtime.
* There is now some support for cross-compiling in make.sh: each of
the phases of make.sh has its own script. (This should be transparent
to people doing ordinary, non-cross-compile builds.)
* Since my laptop doesn't have hundreds of megabytes of memory like
my desktop machine, I became more motivated to do some items on
my to-do list in order to reduce the size of the system a little:
** Arrange for various needed-only-at-cold-init things to be
uninterned after cold init. To support this, those things have
been renamed from FOO and *FOO* to !FOO and *!FOO* (i.e., all
symbols with such names are now uninterned after cold init).
** Bind SB!C::*TOP-LEVEL-LAMBDA-MAX* to a nonzero value when building
fasl files for cold load.
** Remove the old compiler structure pooling code (which used to
be conditional on the target feature :SB-ALLOC) completely.
** Redo the representation of some data in cold init to be more compact.
(I also looked into supporting byte compiled code at bootstrap time,
which would probably reduce the size of the system a lot, but that
looked too complicated, so I punted for now.)
* The maximum signal nesting depth in the src/runtime/ support code has
been reduced from 4096 to 256. (I don't know any reason for the very
large old value. If the new smaller value turns out to break something,
I'll probably just bump it back up.)
* PPRINT-LOGICAL-BLOCK is now pickier about the types of its arguments,
as per ANSI.
* Many, many bugs reported by Peter Van Eynde have been added to
the BUGS list; some have even been fixed.
* While enabling dynamic object file loading, I tried to make the
code easier to understand, renaming various functions and variables
with less ambiguous names, and changing some function calling
conventions to be Lispier (e.g. returning NIL instead of 0 for failure).
* While trying to figure out how to do the OpenBSD port, I tried to
clean up some of the code in src/runtime/. In particular, I dropped
support for non-POSIX signal handling, added various comments,
tweaked the code to reduce the number of compilation warnings, and
renamed some files to increase consistency.
* To support the new automatic configuration functionality in make.sh,
the source file target-features.lisp-expr has been replaced with the
source file base-target-features.lisp-expr and the machine-generated
* fixed a stupid quoting error in make.sh so that using CMU CL
"lisp -batch" as cross-compilation host works again
changes in sbcl-0.6.8 relative to sbcl-0.6.7:
* The system is now under CVS at SourceForge (instead of the
CVS repository on my home machine).
* The new signal handling code has been tweaked to treat register
contents as (UNSIGNED-BYTE 32), as the old CMU CL code did,
instead of (SIGNED-BYTE 32), as the C header files have it. (Code
downstream, e.g. in debug-int.lisp, has implicit dependencies
on the unsignedness of integer representation of machine words,
and that caused the system to bomb out with infinite regress
when trying to recover from type errors involving signed values,
e.g. (BUTLAST '(1 2 3) -1).)
* (BUTLAST NIL) and (NBUTLAST NIL) now return NIL as they should.
(This was one of the bugs Peter Van Eynde reported back in July.)
* The system now uses code inspired by Colin Walters' O(N)
implementation of MAP (from the firstname.lastname@example.org mailing
list, 2 September 2000) when it can't use a DEFTRANSFORM to
inline the MAP operation, and there is more than one
sequence argument to the MAP call (so that it can't just
do ETYPECASE once and for all based on the type of the
single sequence argument). (The old non-inline implementation
of the general M-argument sequence-of-length-N case required
O(M*N*N) time when any of the sequence arguments were LISTs.)
* The QUIT :UNIX-CODE keyword argument has been renamed to
QUIT :UNIX-STATUS. (The old name still works, but is deprecated.)
* Raymond Wiker's patches to port RUN-PROGRAM from CMU CL to SBCL
have been added.
* Raymond Wiker's patches to port dynamic loading from Linux to
FreeBSD have been added.
* The BUGS file is now more nearly up to date, thanks in large part
to Martin Atzmueller's review of it.
* The debugger now flushes standard output streams before it begins
its output ("debugger invoked" and so forth).
* The core version number and fasl file version number have both
been incremented, because of incompatible changes in the layout
of static symbols.
* FINISH-OUTPUT is now called more consistently on QUIT. (It
used to not be called for a saved Lisp image.)
* Martin Atzmueller's version of a patch to fix a compiler crash,
as posted on sbcl-devel 13 September 2000, has been installed.
* Instead of installing Martin Atzmueller's patch for the
compiler transform for SUBSEQ, I deleted the compiler transform,
and transforms for some similar consing operations.
* A bug in signal handling which kept TRACE from working on OpenBSD
has been fixed.
* added enough DEFTRANSFORMs to allow (SXHASH 'FOO) to be optimized
away by constant folding
* The system now defines its address space constants in one place
(in the Lisp sources), and propagates them automatically elsewhere
(through GENESIS and the sbcl.h file). Therefore, patching the
address map is less unnecessarily tedious and error-prone. The
Lisp names of address space constants have also been systematized.
* CVS tags like dollar-Header-dollar have been removed from
the sources, because they have never saved me trouble and
they've been source of trouble working with patches and other
* fixed the PROG1-vs.-PROGN bug in HANDLER-BIND (reported by
email@example.com on firstname.lastname@example.org 2000-10-25)
changes in sbcl-0.6.9 relative to sbcl-0.6.8:
* DESCRIBE now works on CONDITION objects.
* The debugger now handles errors which arise when trying to print
*DEBUG-CONDITION*, so that it's less likely to fall into infinite
* The build system now uses an additional file, customize-target-features.lisp,
to allow local modifications to the target *FEATURES* list. (The point of
this is that now I can set up a custom configuration, e.g. with :SB-SHOW
debugging features enabled, without having to worry about propagating it
into everyone's system when I do a "cvs update".) When no
customize-target-features.lisp file exists, the target *FEATURES* list
should be constructed the same way as before.
* fixed bugs in DEFCONSTANT ANSI-compatibility:
** DEFCONSTANT now tests reassignments using EQL, not EQUAL, in order to
warn about behavior which is undefined under the ANSI spec. Note: This
is specified by ANSI, but it's not very popular with programmers.
If it causes you problems, take a look at the new SB-INT:DEFCONSTANT-EQX
macro in the SBCL sources for an example of a workaround which you
might use to make portable ANSI-standard code which does what you want.
** DEFCONSTANT's implementation is now based on EVAL-WHEN instead of on
pre-ANSI IR1 translation magic, so it does the ANSI-specified thing
when it's used as a non-toplevel form. (This is required in order
to implement the DEFCONSTANT-EQX macro.)
** (DEFCONSTANT X 1) (DEFVAR X) (SETF X 2) no longer "works".
** Unfortunately, non-toplevel DEFCONSTANT forms can still do some
funny things, due to bugs in the implementation of EVAL-WHEN
(bug #IR1-3). This probably won't be fixed until 0.7.x. (Fortunately,
non-toplevel DEFCONSTANTs are uncommon.)
* The core file version number and fasl file version number have been
incremented, because the old noncompliant DEFCONSTANT behavior involved
calling functions which no longer exist, and because I also took the
opportunity to chop an unsupported slot out of the DEBUG-SOURCE structure.
* fixed bug 1 (error handling before read-eval-print loop starts), and
redid debugger restarts and related debugger commands somewhat while
** The QUIT debugger command is gone, since it did something
rather different than the SB-EXT:QUIT command, and since it never
worked properly outside the main toplevel read/eval/print loop.
Invoking the new TOPLEVEL restart provides the same functionality.
** The GO debugger command is also gone, since you can just invoke
the CONTINUE restart directly instead.
** The TOP debugger command is also gone, since it's redundant with the
FRAME 0 command, and since it interfered with abbreviations for the
* The system now recovers better from non-PACKAGE values of the *PACKAGE*
* The system now understands compound CONS types (e.g. (CONS FIXNUM T))
as required by ANSI. (thanks to Douglas Crosher's CMU CL patches, with
some porting work by Martin Atzmueller)
* Martin Atzmueller reviewed the CMU CL mailing lists and came back
with a boatload of patches which he ported to SBCL. Now that those
have been applied,
** The system tries to make sure that its low-priority messages
are prefixed by semicolons, to help people who like to use
syntax highlighting in their ILISP buffer. (This patch
was originally due to Raymond Toy.)
** The system now optimizes INTEGER-LENGTH better, thanks to more
patches originally written by Raymond Toy.
** The compiler understands coercion between single-value and
multiple-VALUES type expressions better, getting rid of some very
weird behavior, thanks to patches originally by Robert MacLachlan
and Douglas Crosher.
** The system understands ANSI-style non-KEYWORD &KEY arguments in
lambda lists, thanks to a patch originally by Pierre Mai.
** The system no longer bogusly warns about "abbreviated type
** The compiler gets less confused by inlining and RETURN-FROM,
thanks to some patches originally by Tim Moore.
** The system no longer hangs when dumping circular lists to fasl
files, thanks to a patch originally from Douglas Crosher.
* Martin Atzmueller also fixed ROOM, so that it no longer fails with an
undefined function error.
* gave up on fixing bug 3 (forbidden-by-ANSI warning for type mismatch
in structure slot initforms) for now, documented workaround instead:-|
* fixed bug 4 (no WARNING for DECLAIM FTYPE of slot accessor function)
* fixed bug 5: added stubs for various Gray stream functions called
in the not-a-CL:STREAM case, so that even when Gray streams aren't
installed, at least appropriate type errors are generated
* fixed bug 8: better reporting of various PROGRAM-ERRORs
* fixed bug 9: IGNORE and IGNORABLE now work reasonably and more
consistently in DEFMETHOD forms.
* removed bug 21 from BUGS, since Martin Atzmueller points out that
it doesn't seem to affect SBCL after all
* The C runtime system now builds with better optimization and many
fewer warnings, thanks to lots of cleanups by Martin Atzmueller.
changes in sbcl-0.6.10 relative to sbcl-0.6.9:
* A patch from Martin Atzmueller seems to have solved the SIGINT
problem, and as far as we know, signal-handling now works cleanly.
(If you find any new bugs, please report them!)
* The system no longer defaults Lisp source file names to types
".l", ".cl", or ".lsp", but only to ".lisp".
* The compiler no longer uses special default file extensions for
byte-compiled code. (The ANSI definition of COMPILE-FILE-PATHNAME
seems to expect a single default extension for all compiled code,
and there's no compelling reason to try to stretch the standard
to allow two different extensions.) Instead, byte-compiled files
default to the same extension as native-compiled files.
* Fasl file format version numbers have increased again, because
a rearrangement of internal implementation packages made some
dumped symbols in old fasl files unreadable in new cores.
* DECLARE/DECLAIM/PROCLAIM logic is more nearly ANSI in general, with
many fewer weird special cases.
* Bug #17 (differing COMPILE-FILE behavior between logical and
physical pathnames) has been fixed, and some related misbehavior too,
thanks to a patch from Martin Atzmueller.
* Bug #30 (reader problems) is gone, thanks to a CMU CL patch
by Tim Moore, ported to SBCL by Martin Atzmueller.
* Martin Atzmueller fixed several filesystem-related problems,
including bug #36, in part by porting CMU CL patches, which were
written in part by Paul Werkowski.
* More compiler warnings in src/runtime/ are gone, thanks to
more patches from Martin Atzmueller.
* Martin Atzmueller pointed out that bug 37 was fixed by his patches
some time ago.
changes in sbcl-0.6.11 relative to sbcl-0.6.10:
* Martin Atzmueller pointed out that bugs #9 and #25 are gone in
* bug 34 fixed by Martin Atzmueller: dumping/loading instances works
* fixed bug 40: TYPEP, SUBTYPEP, UPGRADED-ARRAY-ELEMENT-TYPE,
and UPGRADED-COMPLEX-PART-TYPE now work better with of compound
types built from undefined types, e.g. '(VECTOR SOME-UNDEF-TYPE).
* DESCRIBE now works on structure objects again.
* Most function call argument type mismatches are now handled as
STYLE-WARNINGs instead of full WARNINGs, since the compiler doesn't
know whether the function will be redefined before the call is
executed. (The compiler could flag local calls with full WARNINGs,
as per the ANSI spec "184.108.40.206 Semantic Constraints", but right now
it doesn't keep track of enough information to know whether calls
are local in this sense.)
* Compiler output is now more verbose, with messages truncated
later than before. (There should be some supported way for users
to override the default verbosity, but I haven't decided how to
provide it yet, so this behavior is still controlled by the internal
SB-C::*COMPILER-ERROR-PRINT-FOO* variables in
* Fasl file format version numbers have increased again, because
support for the Gray streams extension changes the layout of the
system's STREAM objects.
* The Gray subclassable streams extension now works, thanks to a
patch from Martin Atzmueller.
* The full LOAD-FOREIGN extension (not just the primitive
LOAD-FOREIGN-1) now works, thanks to a patch from Martin Atzmueller.
* The default behavior of RUN-PROGRAM has changed. Now, unlike CMU CL
but like most other programs, it defaults to copying the Unix
environment from the original process instead of starting the
new process in an empty environment.
* Extensions which manipulate the Unix environment now support
an :ENVIRONMENT keyword option which doesn't smash case or
do other bad things. The CMU-CL-style :ENV option is retained
for porting convenience.
* LOAD-FOREIGN (and LOAD-1-FOREIGN) now support logical pathnames,
as per Daniel Barlow's suggestion and Martin Atzmueller's patch
changes in sbcl-0.6.12 relative to sbcl-0.6.11:
* incompatible change: The old SB-EXT:OPTIMIZE-INTERFACE declaration
is no longer recognized. I apologize for this, because it was
listed in SB-EXT as a supported extension, but I found that
its existing behavior was poorly specified, as well as incorrectly
specified, and it looked like too much of a mess to straighten it
out. I have enough on my hands trying to get ANSI stuff to work..
* many patches ported from CMU CL by Martin Atzmueller, with
half a dozen bug fixes in pretty-printing and the debugger, and
half a dozen others elsewhere
* fixed bug 13: Floating point infinities are now supported again.
They might still be a little bit flaky, but thanks to bug reports
from Nathan Froyd and CMU CL patches from Raymond Toy they're not
as flaky as they were.
* The --noprogrammer command line option is now supported. (Its
behavior is slightly different in detail from what the old man
page claimed it would do, but it's still appropriate under the
same circumstances that the man page talks about.)
* The :SB-PROPAGATE-FLOAT-TYPE and :SB-PROPAGATE-FUN-TYPE features
are now supported, and enabled by default. Thus, the compiler can
handle many floating point and complex operations much less
inefficiently. (Thus e.g. you can implement a complex FFT
* The compiler now detects type mismatches between DECLAIM FTYPE
and DEFUN better, and implements CHECK-TYPE more correctly, and
SBCL builds under CMU CL again despite its non-ANSI EVAL-WHEN,
thanks to patches from Martin Atzmueller.
* various fixes to make the cross-compiler more portable to
ANSI-conforming-but-different cross-compilation hosts (notably
Lispworks for Windows, following bug reports from Arthur Lemmens)
* A bug in READ-SEQUENCE for CONCATENATED-STREAM, and a gross
ANSI noncompliance in DEFMACRO &KEY argument parsing, have been
fixed thanks to Pierre Mai's CMU CL patches.
* fixes to keep the system from overflowing internal counters when
it tries to use i/o buffers larger than 16M bytes
* fixed bug 45a: Various internal functions required to support
complex special functions have been merged from CMU CL sources.
(When I was first setting up SBCL, I misunderstood a compile-time
conditional #-OLD-SPECFUN, and so accidentally deleted them.)
* improved support for type intersection and union, fixing bug 12
(e.g., now (SUBTYPEP 'KEYWORD 'SYMBOL)=>T,T) and some other
more obscure bugs as well
* some steps toward byte-compiling non-performance-critical
parts of the system, courtesy of patches from Martin Atzmueller
* Christophe Rhodes has made some debian packages of sbcl at
From his sbcl-devel e-mail of 2001-04-08 they're not completely
stable, but are nonetheless usable. When he's ready, I'd be happy
to add them to the SourceForge "File Releases" section. (And if
anyone wants to do RPMs or *BSD packages, they'd be welcome too.)
* new fasl file format version number (because of changes in
internal representation of (OR ..) types to accommodate the new
support for (AND ..) types, among other things)
changes in sbcl-0.6.13 relative to sbcl-0.6.12:
* a port to the Compaq/DEC Alpha CPU, thanks to Dan Barlow
* Martin Atzmueller ported Tim Moore's marvellous CMU CL DISASSEMBLE
patch, so that DISASSEMBLE output is much nicer.
* The code in the SB-PROFILE package now seems reasonably stable.
I still haven't decided what the final interface should look like
(I'd like PROFILE to interact cleanly with TRACE, since both
facilities use function encapsulation) but if you have a need
for profiling now, you can probably use it successfully with
the current CMU-CL-style interface.
* Pathnames and *DEFAULT-DIRECTORY-DEFAULTS* are much more
ANSI-compliant, thanks to various fixes and tests from Dan Barlow.
Also, at Dan Barlow's suggestion, TRUENAME on a dangling symbolic
link now returns the dangling link itself, and for similar
reasons, TRUENAME on a cyclic symbolic link returns the cyclic
link itself. (In these cases the old code signalled an error and
looped endlessly, respectively.) Thus, DIRECTORY now works even
in the presence of dangling and cyclic symbolic links.
* Compiler trace output (the :TRACE-FILE option to COMPILE-FILE)
is now a supported extension again, since the consensus on
sbcl-devel was that it can be useful for ordinary development
work, not just for debugging SBCL itself.
* The default for SB-EXT:*DERIVE-FUNCTION-TYPES* has changed to
NIL, i.e. ANSI behavior, i.e. the compiler now recognizes
that currently-defined functions might be redefined later with
different return types.
* Hash tables can be printed readably, as inspired by CMU CL code
of Eric Marsden and SBCL code of Martin Atzmueller.
* better error handling in CLOS method combination, thanks to
Martin Atzmueller porting Pierre Mai's CMU CL patches
* more overflow fixes for >16Mbyte I/O buffers
* A bug in READ has been fixed, so that now a single Ctrl-D
character suffices to cause end-of-file on character streams.
In particular, now you only need one Ctrl-D at the command
line (not two) to exit SBCL.
* fixed bug 26: ARRAY-DISPLACEMENT now returns (VALUES NIL 0) for
* fixed bug 107 (reported as a CMU CL bug by Erik Naggum on
comp.lang.lisp 2001-06-11): (WRITE #*101 :RADIX T :BASE 36) now
does the right thing.
* The implementation of some type tests, especially for CONDITION
types, is now tidier and maybe faster, due to CMU CL code
originally by Douglas Crosher, ported by Martin Atzmueller.
* Some math functions have been fixed, and there are new
optimizers for deriving the types of COERCE and ARRAY-ELEMENT-TYPE,
thanks to Raymond Toy's work on CMU CL, ported by Martin Atzmueller.
* (There are also some new optimizers in contrib/*-extras.lisp. Those
aren't built into sbcl-0.6.13, but are a sneak preview of what's
likely to be built into sbcl-0.7.0.)
* A bug in COPY-READTABLE was fixed. (Joao Cachopo's patch to CMU
CL, ported to SBCL by Martin Atzmueller)
* DESCRIBE now gives more information in some cases. (Pierre Mai's
patch to CMU CL, ported to SBCL by Martin Atzmueller)
* Martin Atzmueller and Bill Newman fixed some bugs in INSPECT.
* There's a new slam.sh hack to shorten the edit/compile/debug
cycle for low-level changes to SBCL itself, and a new
:SB-AFTER-XC-CORE target feature to control the generation of
the after-xc.core file needed by slam.sh.
* minor incompatible change: The ENTRY-POINTS &KEY argument to
COMPILE-FILE is no longer supported, so that now every function
gets an entry point, so that block compilation looks a little
more like the plain vanilla ANSI section 220.127.116.11 scheme.
* minor incompatible change: SB-EXT:GET-BYTES-CONSED now
returns the number of bytes consed since the system started,
rather than the number consed since the first time the function
was called. (The new definition parallels ANSI functions like
* minor incompatible change: The old CMU-CL-style DIRECTORY options,
i.e. :ALL, :FOLLOW-LINKS, and :CHECK-FOR-SUBDIRS, are no longer
supported. Now DIRECTORY always does the abstract Common-Lisp-y
thing, i.e. :ALL T :FOLLOW-LINKS T :CHECK-FOR-SUBDIRS T.
* Fasl file version numbers are now independent of the target CPU,
since historically most system changes which required version
number changes have affected all CPUs equally. Similarly,
the byte fasl file version is now equal to the ordinary
fasl file version.
changes in sbcl-0.7.0 relative to sbcl-0.6.13:
* incompatible change: The default fasl file extension has changed
to ".fasl", for all architectures. (No longer ".x86f" and ".axpf".)
* The EVAL-WHEN code has been rewritten to be ANSI-compliant, and
various related bugs (IR1-1, IR1-2, IR1-3, IR1-3a) have gone away.
Since the code is newer, there might still be some new bugs
(though not as many as before Martin Atzmueller's fixes:-). But
hopefully any remaining bugs will be simpler, less fundamental,
and more fixable then the bugs in the old IR1 interpreter code.
* The IR1 interpreter, byte compiler, and byte interpreter are gone.
It's long been my plan to remove the IR1 interpreter while making
EVAL-WHEN ANSI-compliant. It turned out that a cascade of changes
caused by EVAL-WHEN ANSIness would have required fairly simple
changes to the byte compiler; except they turned out to be quite
difficult. This, plus the new familiarity with the byte compiler
in general that I picked up as I worked on this specific problem,
reduced my opinion of its maintainability enough that I deleted it
instead of trying to fix it.
* There are new compiler optimizations for various functions: FIND,
POSITION, FIND-IF, POSITION-IF, FILL, COERCE, TRUNCATE, FLOOR, and
CEILING. Mostly these should be transparent, but there's one
potentially-annoying problem (bug 117): when the compiler inline
expands the FIND/POSITION family of functions and does type
analysis on the result, it can find control paths which have
type mismatches, and when it can't prove that they're not taken,
it will issue WARNINGs about the type mismatches. It's not clear
how to make the compiler smart enough to fix this in general, but
a workaround is given in the entry for 117 in the BUGS file.
* DEFSTRUCT and DEFCLASS have been substantially updated to take
advantage of the new EVAL-WHEN stuff and to clean them up in
general, and they are now more ANSI-compliant in a number of
ways. Martin Atzmueller is responsible for a lot of this.
* A bug in LOOP operations on hash tables has been fixed, thanks
to a bug report and patch from Alexey Dejneka.
* The default value of *BYTES-CONSED-BETWEEN-GCS* has been
doubled, to 4 million. (If your application spends a lot of time
GCing and you have a lot of RAM, you might want to experiment with
increasing it even more.)
* PPRINT-LOGICAL-BLOCK now copies the *PRINT-LINES* value on entry
and uses that copy, rather than the current dynamic value, when
it's trying to decide whether to truncate output . Thus e.g.
(let ((*print-lines* 50))
(pprint-logical-block (stream nil)
(dotimes (i 10)
(let ((*print-lines* 8))
(print (aref possiblybigthings i) stream)))))
should truncate the logical block only at 50 lines, instead of
often truncating it at 8 lines.
* :SB-CONSTRAIN-FLOAT-TYPE, :SB-PROPAGATE-FLOAT-TYPE, and
:SB-PROPAGATE-FUN-TYPE are no longer considered to be optional
features. Instead, the code that they used to control is always
built into the system.
* The support for (DECLAIM (INLINE FOO)) followed by (DEFUN FOO ..) in
a non-null lexical environment has been weakened. (It will still
compile, but the compiler will be much less determined to inline FOO
than it used to be.)
?? Old operator names in the style DEF-FOO are now deprecated in favor
of new corresponding names DEFINE-FOO, for consistency with the
naming convention used in the ANSI standard). This mostly affects
internal symbols, but a few external symbols like
SB-ALIEN:DEF-ALIEN-FUNCTION are also affected.
* minor incompatible change: DEFINE-ALIEN-FUNCTION (also known by
the old deprecated name DEF-ALIEN-FUNCTION) now does DECLAIM FTYPE
for the defined function, since declaiming return types involving
aliens is (1) annoyingly messy to do by hand and (2) vital
to efficient compilation of code which calls such functions (and
since people writing calls-to-C code aren't likely to be bothered
by implicit assumptions of static typing).
* The interpreter, EVAL, has been rewritten. Now it calls the
native compiler for the difficult cases, where it used to call
the old specialized IR1 interpreter code.
* The doc/cmucl/ directory, containing old CMU CL documentation,
is no longer part of the base system. SourceForge has shut down
its anonymous FTP service, and with it my original plan for
distributing them separately. For now, if you need them you can
download an old sbcl source release and get them from there.
?? The compiler, especially the IR1 phase of the compiler, has been
tweaked somewhat to support the new implementation of DEFUN and
of the static linking hack used for cold init. In particular,
the property of "is externally visible" is now orthogonal to
the property of "is optimized/specialized for being called
at LOAD time, with no arguments and no argument checking".
The old FUNCTIONAL-KIND=:TOP-LEVEL type code which
conflated these two properties has been replaced with the
FUNCTIONAL-HAS-EXTERNAL-REFERENCES-P flag. This has minor
beneficial consequences for the logic of #'CL:COMPILE and other
things. Like the rewrite of EVAL, it has also quite possibly
introduced some new bugs, but since the new logic is simpler and
more orthogonal, hopefully it will be easier to clean up bugs
in the new code than it was in the old code.
* lots of other tidying up internally: renaming things so that names
are more systematic and consistent, converting C macros to inline
functions, systematizing indentation, making symbol packaging
more logical, and so forth
* The fasl file version number changed again, for about a dozen
reasons, some of which are obvious above.
planned incompatible changes in 0.7.x:
* The debugger prompt sequence now goes "5]", "5", "5", etc.
as you get deeper into recursive calls to the debugger command loop,
instead of the old "5]", "5]]", "5]]]" sequence. (I was motivated
to do this when squabbles between ILISP and SBCL left me
very deeply nested in the debugger.)
* The default output representation for unprintable ASCII characters
which, unlike e.g. #\Newline, don't have names defined in the
ANSI Common Lisp standard, may change to their ASCII symbolic
names: #\Nul, #\Soh, #\Stx, etc.
* INTERNAL-TIME-UNITS-PER-SECOND might increase, e.g. to 1000.
* FASL file extensions change to ".fasl", instead of the various
CPU-dependent values (".x86f", ".axpf", etc.) inherited from CMU CL.
* MAYBE-INLINE will probably go away at some point, maybe 0.7.x,
maybe later, in favor of the ANSI-recommended idiom for making
a function optionally inline.
* When the profiling interface settles down, maybe in 0.7.x, maybe
later, it might impact TRACE. They both encapsulate functions, and
it's not clear yet how e.g. UNPROFILE will interact with TRACE
and UNTRACE. (This shouldn't matter, though, unless you are
using profiling. If you never profile anything, TRACE should
continue to behave as before.)
* The BYTE-COMPILE &KEY argument for COMPILE-FILE is deprecated,
since this behavior can be controlled by (DECLAIM (OPTIMIZE (SPEED 0))).
("An ounce of orthogonality is worth a pound of features.")