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 FOP-POP-FOR-EFFECT * 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 return FAILURE-P). * 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 COMPILE-FILE command) * 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 DEFINE-COMPILER-MACRO..) * 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 maintain them. * 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 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 no clauses. 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 inline code * 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 implementations. * 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 cmucl-imp@cons.org mailing list). * 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 KEYWORD package. * 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 file local-target-features.lisp-expr. * 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 cmucl-imp@cons.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 diff-related operations. * fixed the PROG1-vs.-PROGN bug in HANDLER-BIND (reported by ole.rohne@cern.ch on cmucl-help@cons.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 regress. * 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 doing so: ** 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 TOPLEVEL restart. * The system now recovers better from non-PACKAGE values of the *PACKAGE* variable. * 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 declarations". ** 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 current SBCL. * bug 34 fixed by Martin Atzmueller: dumping/loading instances works better * 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 "3.2.2.3 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 src/compiler/ir1util.lisp.) * 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 without consing!) * 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 undisplaced arrays. * 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 3.2.2.3 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 CL:GET-INTERNAL-RUN-TIME.) * 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: * major incompatible change: The default fasl file extension, i.e. the default extension for files produced by COMPILE-FILE, has changed to ".fasl", for all architectures. (No longer ".x86f" and ".axpf".) * compiler changes: ** There are many changes in the implementation of the compiler. SBCL is now essentially a compiler-only implementation of ANSI Common Lisp. EVAL still "interprets" a few special cases, but almost all the interesting cases are handled by creating a LAMBDA expression, calling COMPILE on it, then calling FUNCALL on the result. ** 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 the new code is substantially simpler and clearer, and hopefully any remaining bugs will be simpler, less fundamental, and more fixable then the bugs in the old code. ** The revised compiler is still a little unsteady on its feet. In particular, *** The debugging information it produces (particularly the names of FUNCTION objects) is sometimes much less useful than what the old compiler produced. *** The support for inlining FOO when you (DECLAIM (INLINE FOO)) then do (DEFUN FOO ..) in a non-null lexical environment (e.g. within a MACROLET) has been temporarily weakened. ** There are new compiler optimizations for various functions: *** the sequence functions FIND, POSITION, FIND-IF, POSITION-IF, FIND-IF-NOT, POSITION-IF-NOT, and FILL *** the math functions TRUNCATE, FLOOR, and CEILING *** the function-of-all-trades COERCE Mostly these should be transparent, but there's one potentially-annoying problem (bug 117): when the compiler inline-expands a function and does type analysis on the result, it can create control paths which have type mismatches, and when it can't prove that those control paths aren't taken, it will issue WARNINGs about the type mismatches. This is a particular problem in practice for the new sequence functions. It's not clear how this should be fixed, and for now, a workaround is given in the entry for 117 in the BUGS file. ** (Because of the interaction between the two previous items -- occasional inlining problems and new inline expansions -- some of the new sequence function optimizations won't really kick in completely until debugging information, and then inlining, are straightened out in some future version.) * minor incompatible changes: ** As part of a bug fix by Christophe Rhodes to DIRECTORY behavior, DIRECTORY no longer implicitly promotes NIL slots of its pathname argument to :WILD. In particular, when you ask for the contents of a directory (which you used to be able to do without explicit wildcards, e.g. (DIRECTORY "/tmp/")) you now need to use explicit wildcards, e.g. (DIRECTORY "/tmp/*.*"). ** changes in behavior that ANSI explicitly defines to be implementation dependent: *** The new compiler-only implementation still conforms with ANSI, but acts a little different than before. Besides the obvious changes in performance tradeoffs (that the cost per form passed to EVAL has gone up, and the cost per form executed by EVAL has gone down), the behavior of the system changes a little because there are no longer any interpreted function objects. COMPILED-FUNCTION-P is now synonymous with FUNCTIONP, and e.g. doing COMPILE on the output of interactive DEFUN is now a no-op. *** The value of INTERNAL-TIME-UNITS-PER-SECOND has been increased from 100 to 1000. *** The default for the USE list in MAKE-PACKAGE and DEFPACKAGE has changed from (:CL) to NIL. *** The CHAR-NAME of unprintable ASCII characters which, unlike e.g. #\Newline and #\Tab, don't have names specified in the ANSI Common Lisp standard, is now based on their ASCII symbolic names (#\Nul, #\Soh, #\Stx, etc.) The old CMU-CL-style names (#\Null, #\^a, #\^b, etc.) are still accepted by NAME-CHAR, but are no longer used for output. ** changes in internal implementation constants: *** The default value of *BYTES-CONSED-BETWEEN-GCS* has 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.) ** The SB-C-CALL package has been merged into the SB-ALIEN package. However, almost all old code should still continue to work without immediate update, as SB-C-CALL is now a (deprecated) nickname for SB-ALIEN. ** 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 (DEFSTRUCT, DEFVAR, DEFINE-CONDITION, DEFINE-MODIFY-MACRO..). This mostly affects internal symbols, but a few supported extensions like SB-ALIEN:DEF-ALIEN-FUNCTION are also affected. (So e.g. DEF-ALIEN-FUNCTION becomes DEFINE-ALIEN-FUNCTION.) ** The debugger prompt sequence now goes "5]", "5[2]", "5[3]", 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. In the short term, this change will probably provoke more ILISP/SBCL squabbles, but hopefully it will be an improvement in the long run.) ** SB-ALIEN: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. ** SB-ALIEN:LOAD-FOREIGN and SB-ALIEN:LOAD-1-FOREIGN are no longer reexported by the SB-EXT package. They're solely useful for alien code, so it seems more logical that you should get them from the SB-ALIEN package, not in SB-EXT. ** :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. * many other bug fixes ** 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. ** Besides the cleanups discussed above, Martin Atzmueller fixed several other bugs: *** fixes in READ-SEQUENCE and WRITE-SEQUENCE *** correct ERROR type for various file operations *** some fixes for Lisp streams *** DEFMETHOD syntax checking *** changing old weird representation of debug information as strings (which, among their other deficiencies, don't transform correctly when you rename packages, and don't change their print representation when you change things like *PACKAGE* and *PRINT-LENGTH*) to symbols and lists of symbols He also made several improvements and fixed several bugs in DESCRIBE. ** Alexey Dejneka fixed many bugs, including classic bugs and bugs he discovered himself: *** misbehavior of WRITE-STRING/WRITE-LINE *** LOOP over keys of a hash table, LOOP bugs 49b and 81 and 103, and several other LOOP problems as well *** DIRECTORY when similar filenames are present *** DEFGENERIC with :METHOD options *** bug 126, in (MAKE-STRING N :INITIAL-ELEMENT #\SPACE)) *** bug in the optimization of ARRAY-ELEMENT-TYPE *** argument ordering in FIND with :TEST option *** mishandled package designator argument in APROPOS-LIST *** various problems in the backquote readmacro *** a bug in APROPOS *** probably some others that I'm not describing very well here, since the CVS log documents them by reference to sbcl-devel messages, and the SourceForge archives aren't working well.:-( ** Dan Barlow improved the Alpha port (and is making progress on the PPC port, for those of you who think different). ** Besides the DIRECTORY fixes and changes mentioned elsewhere, Christophe Rhodes cleaned up the system self-test scripts (in tests/*), contributed the optimization of FIND-IF-NOT and POSITION-IF-NOT, and continues to work on the SPARC port (for those of you in a position to look down upon our little PC-compatible boxes from a great height). ** 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 now truncate the logical block only at 50 lines, instead of often truncating it at 8 lines, as it did before. * The doc/cmucl/ directory, containing old CMU CL documentation from the time of the fork, is no longer part of the base system. SourceForge has shut down its anonymous FTP service, and with it my original plan for distributing the old CMU CL documentation there. For now, if you need these files you can download an old SBCL source release and extract them from it. * The fasl file version number changed again, for dozens of reasons, some of which are apparent above. changes in sbcl-0.7.1 relative to sbcl-0.7.0: * mostly bug fixes: ** SB-ALIEN:LOAD-FOREIGN and SB-ALIEN:LOAD-1-FOREIGN are set up properly again. (There was a packaging bug in 0.7.0 which left their definitions in SB-SYS::LOAD-FOREIGN and SB-SYS::LOAD-1-FOREIGN. LOAD-FOREIGN and LOAD-1-FOREIGN are vital for most things which interface to C-level interfaces, like extensions working with sockets or databases or Perl-compatible regexes or whatever, and the need to fix this bug is the main reason that 0.7.1 was released so soon after 0.7.0.) ** DEFGENERIC is now choosier about the methods it redefines, so that reLOADing a previously-LOADed file containing DEFGENERICs does the right thing now. Thus, the Lispy edit/reLOAD-a-little/test cycle now works as it should. (thanks to Alexey Dejneka) ** Bug 106 (types (COMPLEX FOO) where FOO is an obscure type) was fixed by Christophe Rhodes. (He actually submitted this patch months ago, and I delayed until after 0.7.0.) ** Bug 111 (internal compiler confusion about runtime checks on FUNCTION types) was fixed by Alexey Dejneka. * Some internal cleanups (getting rid of variables which aren't needed now that the byte interpreter is gone) caused the fasl file format number to change again. changes in sbcl-0.7.2 relative to sbcl-0.7.1: * incompatible change: The compiler is now less aggressive about tail call optimization, doing it only when (> SPACE DEBUG) or (> SPEED DEBUG). (This is an incompatible change because there are programs which relied on the old CMU-CL-style behavior to optimize away their unbounded recursion which will now die of stack overflow.) * minor incompatible change: The default BYTES-CONSED-BETWEEN-GCS for non-GENCGC systems has been increased to 20M (since that seems much closer to the likely performance optimum for modern systems than the old 4M value was) * minor incompatible change: new larger values for *DEBUG-PRINT-LENGTH* and *DEBUG-PRINT-LEVEL* * SBCL runs on SPARC systems now. (thanks to Christophe Rhodes' port of CMU CL's support for SPARC, and various endianness and other SBCL portability fixes due to Christophe Rhodes and Dan Barlow) * new syntactic sugar for the Unix command line: --load foo.bar is now an alternate notation for --eval '(load "foo.bar")'. * bug fixes: ** The system now detects stack overflow and handles it gracefully, at least for (OR (> SAFETY (MAX SPEED SPACE)) (= SAFETY 3)) optimization settings. (This is a good thing in general, and its introduction in this version should be particularly timely for anyone whose code fails because of suppression of tail recursion!) ** The system now hunts for the C variable "environ" in a more devious way, to avoid segfaults when the C library version differs between compile time and run time. (thanks to Christophe Rhodes) ** INTEGER-valued CATCH tags now work. (thanks to Alexey Dejneka, and also to Christophe Rhodes for porting the fix to non-X86 CPUs) ** The compiler no longer issues bogus style warnings for undefined classes in the same source file as the DEFCLASSes which defined them. (thanks to Stig E Sandoe for reporting and Martin Atzmueller for fixing this) ** fixes in CONDITION class precedence list for undefined function errors (thanks to Alexei Dejneka) ** *DEFAULT-PATHNAME-DEFAULTS* is used more consistently and correctly. (thanks to Dan Barlow) ** portability fixes aiming at bootstrapping under CLISP (thanks to Dave McDonald and Christophe Rhodes) ** FORMAT fixes (thanks to Robert Strandh and Dan Barlow) ** fixes in type translation and and type inference (thanks to Christophe Rhodes) ** fixes to optimizer internal errors (thanks to Alexei Dejneka) ** various fixes in the new ports (thanks to Dan Barlow) * several changes related to debugging: ** suppression of tail recursion, as noted above ** stack overflow detection, as noted above ** The default implementation of TRACE has changed. :ENCAPSULATE T is now the default. (For some time encapsulation has been more reliable than the breakpoint-based :ENCAPSULATE NIL implementation, at least on X86 systems; and I just noticed that encapsulation also seems closer to the spirit of the ANSI specification.) changes in sbcl-0.7.3 relative to sbcl-0.7.2: * ANSI's DEFINE-SYMBOL-MACRO is now supported. (thanks to Nathan Froyd porting CMU CL code originally by Douglas Thomas Crosher) * SBCL now runs on the PPC archtiecture under Linux. It actually did this as of 0.7.1.45, but was left out of the previous news section (thanks to Dan Barlow) * SBCL now runs on the Solaris operating system on SPARC architectures (thanks to Christophe Rhodes's port of the CMUCL runtime) * cleanups to the runtime on SPARC, both Linux and Solaris, and for gcc>=3 (thanks to Nathan Froyd and Ingvar Mattsson) * SPARC backend cleanups, allowing builds of cores optimized for V8 and V9 SPARCS, and also emission of code targeted to a particular backend chosen at runtime (thanks to Christophe Rhodes and Raymond Toy) * SBCL is closer to bootstrapping under CLISP, thanks to various fixes by Christophe Rhodes. * The fasl file format has changed again, to allow the compiler's INFO database to support symbol macros. * The user manual (in doc/) is formatted into HTML more nicely. (thanks to coreythomas) * The system is smarter about SUBTYPEP relationships, especially those involving NOT types (including types such as ATOM which are represented internally using NOT types). Thus SUBTYPEP is less likely to return (VALUES NIL NIL) in general, and in particular bugs 58 and (the remaining bits of) bug 50 are fixed. (thanks to Christophe Rhodes) * The fasl file format has changed again, because the internal representation of types now includes a new slot to support the new SUBTYPEP-of-NOT-types logic. * (not a change in the main branch of SBCL, but a related prototype which can hopefully be merged into the main branch of SBCL in the future:) Brian Spilsbury has produced a Unicode-enabled variant of sbcl-0.7.0, available as a patch against sbcl-0.7.0 at . * Bug 151 fixed: GET-DISPATCH-MACRO-CHAR now returns NIL for undefined dispatch macro character combinations. (thanks to Alexey Dejneka) * Bugfix in PARSE-NAMESTRING: we now correctly parse unix namestrings that superficially look like logical namestrings correctly. * USER-HOMEDIR-PATHNAME now returns a (physical) pathname that SBCL can deal with. * Bugfix in DEFSTRUCT: BOA constructor lambda lists now accept (name default supplied-p) for &optional and &key arguments. (thanks to Martin Atzmueller) changes in sbcl-0.7.4 relative to sbcl-0.7.3: * bug 147 fixed: The compiler preserves its block link/count invariants more correctly now so that it doesn't crash. (thanks to Alexey Dejneka) * Dynamic loading of object files in OpenBSD is now supported. (thanks to Pierre Mai) * COMPILE now works correctly on macros. (thanks to Matthias Hoelzl) * GET-MACRO-CHARACTER and SET-MACRO-CHARACTER now represent no-value-for-this-character as NIL (as specified by ANSI). * HOST-NAMESTRING on physical pathnames now returns a string that is valid as a host argument to MERGE-PATHNAMES and to MAKE-PATHNAME. (thanks to Christophe Rhodes) * The Alpha port handles icache flushing more correctly. (thanks to Dan Barlow) * More progress has been made toward bootstrapping under CLISP. (thanks to Christophe Rhodes) * The fasl file format has changed again, because dynamic loading on OpenBSD (which has non-ELF object files) motivated some cleanups in the way that foreign symbols are transformed and passed around. * minor incompatible change: The ASCII RUBOUT character, (CHAR-CODE 127), is no longer treated as whitespace by the reader, but instead as an ordinary character. Thus e.g. (READ-FROM-STRING "AB") returns |AB|, instead of A as it used to. changes in sbcl-0.7.5 relative to sbcl-0.7.4: * SBCL now builds with OpenMCL (version 0.12) as the cross-compilation host; also, more progress has been made toward bootstrapping under CLISP. * SBCL now runs on the Tru64 (aka OSF/1) operating system on the Alpha architecture. * bug 158 fixed: The compiler can now deal with integer loop increments different from 1; fixing this turned out also to fix bug 164. * bug 169 fixed: no more bogus warnings about using lexical bindings despite the presence of perfectly good SPECIAL declarations (thanks to David Lichteblau) * bug 175 fixed: CHANGE-CLASS is now more ANSI-conforming, accepting initargs. (thanks to Espen Johnsen and Pierre Mai) * bug 179 fixed: DIRECTORY can now deal with filenames with pattern characters in them. * bug 180 fixed: Method combination specifications no longer ignore the :MOST-SPECIFIC-LAST option. (thanks to Pierre Mai) * bug fix: Structure type predicate functions now check their argument count as they should. * bug fix: Classes with :METACLASS STRUCTURE-CLASS now print correctly. (thanks to Pierre Mai) * minor incompatible change: The --noprogrammer option is deprecated in favor of the new --disable-debugger option, which is very similar. (The major difference is that it takes effect at a slightly different time at startup, causing handling of errors in --sysinit and --userinit files will be affected differently.) The SB-EXT:DISABLE-DEBUGGER and SB-EXT:ENABLE-DEBUGGER functions have been added to allow this functionality to be controlled from ordinary Lisp code. (ENABLE-DEBUGGER should help people like the Debian maintainers, who might want to run non-interactive scripts to build SBCL cores which will later be used interactively.) * minor incompatible change: The LOAD function no longer, when given a wild pathname to load, loads all files matching that pathname. Instead, an error of type FILE-ERROR is signalled. changes in sbcl-0.7.6 relative to sbcl-0.7.5: * bug fix: Floating point exceptions are treated much more consistently on the x86/Linux and PPC/Linux platforms. * Array initialization with :INITIAL-ELEMENT is now much faster for cases when the compiler cannot open code the array creation, but does know what the UPGRADED-ARRAY-ELEMENT-TYPE will be. General array accesses have also seen a speed increase. * bug fix: LOAD :IF-DOES-NOT-EXIST NIL now works when file type is specified. (This was at the root of some bad interactions between SBCL and ILISP: thanks to Gregory Wright for diagnosing this and reporting the bug.) * bug fix: Internal error arguments for undefined functions are now computed correctly on the PPC/Linux platform. * bug fix: Bad &REST syntax is now checked correctly. (thanks to Raymond Toy's patch for CMU CL) * Support for the Solaris 9 operating environment has been included (thanks to Daniel Merritt) * A very ugly but hopefully complete draft of the missing FFI chapter of the manual has been created by reformatting the corresponding CMU CL manual chapter into (currently very ugly and incoherent) DocBook and bringing it up to date for SBCL behavior. Thus, the manual is now essentially complete, at least by my extreme once-and-only-once standards, whereby it's acceptable to refer to the doc strings of SB-EXT functions as the primary documentation. * The fasl file version number has changed again, due to cleanup of (user-invisible) bitrotted stuff. (E.g. *!INITIAL-FDEFN-OBJECTS* is no longer a static symbol.) changes in sbcl-0.7.7 relative to sbcl-0.7.6: * An alpha-quality port to the parisc architecture running Linux, based on the old CMUCL backend, has been made. This, even more so than the other backends, should be considered still a work in progress; known problems include that the Linux kernel in 64-bit mode does not propagate the correct sigcontext structure to userspace, and consequently SBCL on a parisc64 kernel will not work yet. * fixed bug 189: The compiler now respects NOTINLINE declarations for functions declared in FLET and LABELS. (I.e. "LET conversion" is suppressed.) Also now that the compiler is looking at declarations in the environment, it checks optimization declarations as well, and suppresses inlining when (> DEBUG SPEED). * More fixes have been made to treatment of floating point exception treatment and other Unix signals. In particular, floating point exceptions no longer cause Bus errors on the SPARC/Linux platform. * The detection and handling of control stack exhaustion (infinite or very deeply nested recursion) has changed. Stack exhaustion detection is now done by write-protecting pages at the OS level and applies at all optimization settings; when found, a SB-KERNEL:CONTROL-STACK-EXHAUSTED condition (subclass of STORAGE-CONDITION) is signalled, so stack exhaustion can no longer be caught using IGNORE-ERRORS. * Bugs 65, 70, and 109 fixed: The compiler now preserves invariants correctly when transforming recursive LABELS functions to LETs. (thanks to Alexey Dejneka) * Bug 48a./b. fixed: SYMBOL-MACROLET now refuses to bind symbols that are names of constants or global variables. * Bug fix: DEFINE-ALIEN-ROUTINE now declaims the correct FTYPE for alien routines with docstrings. * Bug 184 fixed: Division of ratios by the integer 0 now signals an error of type DIVISION-BY-ZERO. (thanks to Wolfhard Buss and Raymond Toy) * Bug fix: Errors in PARSE-INTEGER are now of type PARSE-ERROR. (thanks to Eric Marsden) * Bug fix: COERCE to (COMPLEX FLOAT) of rationals now returns an object of type (COMPLEX FLOAT). (thanks to Wolfhard Buss) * Bug fix: The SPARC backend can now compile functions involving LOGAND and stack-allocated arguments. (thanks to Raymond Toy) * Bug fix: We no longer segfault on passing a non-FILE-STREAM stream to a functions expecting a PATHNAME-DESIGNATOR. * Bug fix: DEFGENERIC now enforces the ANSI restrictions on its lambda lists. (thanks to Alexey Dejneka) * Bug fix: changed encoding of PCL's internal MAKE-INSTANCE functions so that EXPORTing the name of the class doesn't cause MAKE-INSTANCE functions from earlier DEFCLASSes to get lost (thanks to Antonio Martinez for reporting this) * Bug 192 fixed: The internal primitive DATA-VECTOR-REF can now be constant-folded without failing an assertion. (thanks to Einar Floystad Dorum for reporting this) * Bugs 123 and 165 fixed: array specializations on as-yet-undefined types are now dealt with more correctly by the compiler. * Minor incompatible change: COMPILE-FILE-PATHNAME now merges its OUTPUT-FILE argument with its INPUT-FILE argument, resulting in behaviour analogous to RENAME-FILE. This puts its behaviour more in line with ANSI's wording on COMPILE-FILE-PATHNAME. (thanks to Marco Antinotti) * The fasl file version number has changed again. (because of the bug fix involving the names of PCL MAKE-INSTANCE functions) changes in sbcl-0.7.8 relative to sbcl-0.7.7: * A beta-quality port to the mips architecture running Linux, based on the old CMUCL backend, has been made. It has been tested on a big-endian kernel, and works sufficiently well to be able to rebuild itself; it has not been tested in little-endian mode. * fixed an inconsistency between gencgc.c and purify.c which made dumping/loading .core files unreliable * fixed bug 120a: The compiler now deals correctly with IFs where the consequent is the same as the alternative, instead of misderiving the return type. (thanks to Alexey Dejneka) * fixed bug 113: Logical pathnames are now dumpable (the logical host is resolved at load-time, throwing an error if it is not found). * fixed bug 174: FORMAT's error message is slightly clearer when a non-printing character is used in a format directive. * fixed several bugs in compiler checking of type declarations, i.e. violations of the Python "declarations are assertions" principle (thanks to Alexey Dejneka) * fixed several bugs in PCL's error checking (thanks to Gerd Moellmann) * fixed bug: printing of FILE-ERROR (thanks to Antonio Martinez-Shotton) * fixed bug in compilation of functions as first class values (thanks to Antonio Martinez-Shotton) * The compiler's handling TYPE-ERRORs which it can prove will inevitably happen at runtime has been cleaned up and corrected in several ways. (thanks to Alexey Dejneka) * improved argument type checking for various basic arithmetic operations (MAX, +, LOGXOR, etc.) which have had so much TLC lavished on them in the past that they can be compiled in many ways in different special cases * fixed bug 181: compiler checks validity of user supplied type specifiers * cleaned up code flushing in optimization: Function calls which should signal errors for safety purposes (e.g. which ANSI says should signal errors when their arguments are of incorrect type) are no longer optimized away. * added new extension: SB-DEBUG:BACKTRACE-AS-LIST * incremented fasl file version number, because changes in the implementation of sequence functions like COERCE caused internal utility functions like COERCE-TO-SIMPLE-VECTOR (used in old inline expansions) to become undefined. (Actually these changes were later undone, so we might very well be binary compatible with 0.7.7 after all, but leaving the version number incremented seemed like the simplest and most conservative thing to do.) changes in sbcl-0.7.9 relative to sbcl-0.7.8: * minor incompatible change: The runtime (the Unix executable named "sbcl") is now much pickier about the .core files it will load. Essentially it now requires .core files to descend from the same build (not just the same sources or LISP-IMPLEMENTATION-VERSION) as the runtime does. (The intent is to prevent the crashes which can occur, and which can even be reported as mysterious failures, when people patch the sources or change the build parameters without changing LISP-IMPLEMENTATION-VERSION, then mix and match sbcl and .core files.) * fixed bug: VALUES-LIST is no longer optimized away. * fixed bug 142: The FFI conversion of C string values to Lisp string values no longer conses excessively. (thanks to Nathan Froyd porting Raymond Toy's fix to CMU CL) * began to systematize and improve MOP conformance in PCL (thanks to Nathan Froyd, Gerd Moellman and Pierre Mai): ** SLOT-DEFINITION-ALLOCATION now returns :CLASS, not the class itself; ** GENERIC-FUNCTION-ARGUMENT-PRECEDENCE-ORDER is now implemented; ** FINALIZE-INHERITANCE is now called on class finalization; ** DOCUMENTATION and (SETF DOCUMENTATION) now have the correct argument precedence order. * fixed bug 202: The compiler no longer fails on functions whose derived types contradict their declared type. * DEFMACRO is implemented via EVAL-WHEN instead of IR1 translation, so it can be non-toplevel. * The fasl file version number has changed (because of the new implementation of DEFMACRO). * (mostly) fixed bugs 46b and 46c: sequence functions now check, in safe code, that any length requirement by their type-specifier argument is valid. The exceptions to this are described in bug 213. * fixed bugs 46h and 46i: TWO-WAY- and CONCATENATED-STREAM creation functions now check the types of their inputs as required by ANSI. * fixed bug 48c: SYMBOL-MACROLET signals PROGRAM-ERROR when an introduced symbol is DECLAREd to be SPECIAL. * fixed reading of (COMPLEX DOUBLE-FLOAT) literals from fasl files * fixed bug: :COUNT argument to sequence functions may be negative * fixed bug: body of DO-SYMBOLS may contain declarations * fixed bug: PUSHNEW now evaluates its arguments from left to right (reported by Paul F. Dietz, fixed by Gerd Moellman) * fixed bug: PUSH, PUSHNEW and POP now evaluate a place given by a symbol macro only once * fixed printing of call frame when argument list is unavailable * fixed bug: :ALLOW-OTHER-KEYS is an allowed keyword name * compiler no longer signals WARNING on unknown keyword :ALLOW-OTHER-KEYS changes in sbcl-0.7.10 relative to sbcl-0.7.9: * Support for building SBCL for MIPS platforms running in little-endian mode has now been checked in, and basic functionality on said platforms verified. * minor incompatible change: PCL now records the pathname of a file in which methods and the like are defined, rather than its truename. * minor incompatible change: TRUENAME now considers the truename of a file naming a directory to be the pathname with :DIRECTORY component indicating that directory. * minor incompatible change: a NAMED clause in the extended form of LOOP no longer causes a BLOCK named NIL to surround the LOOP. The reason for the previous behaviour is unclear. * more systematization and improvement of CLOS and MOP conformance in PCL (thanks to Gerd Moellman and Pierre Mai): ** the standard ANSI CL generic function NO-NEXT-METHOD is now implemented; ** DEFINE-METHOD-COMBINATION no longer signals an error for primary methods with no specializers; ** the MOP generic function GENERIC-FUNCTION-DECLARATIONS is now implemented; ** the Readers for Class Metaobjects methods CLASS-DIRECT-SLOTS and CLASS-DIRECT-DEFAULT-INITARGS have been implemented for FORWARD-REFERENCED-CLASSes; error reporting on CLASS-DEFAULT-INITARGS, CLASS-PRECEDENCE-LIST and CLASS-SLOTS has been improved; ** SXHASH on CLOS instances now uses a slot internal to the instance to return different numbers on distinct instances, while preserving the same return value through invocations of CHANGE-CLASS; ** DEFMETHOD signals errors when methods with longer incongruent lambda lists are added to generic functions; ** COMPUTE-CLASS-PRECEDENCE-LIST now has a method specialized on CLASS, as specified in AMOP; ** COMPUTE-SLOTS :AROUND now assigns locations sequentially based on the order returned by the primary method for classes of class STANDARD-CLASS; ** DEFINE-METHOD-COMBINATION now works with the :ARGUMENTS option. * fixed some bugs shown by Paul Dietz' test suite: ** DOLIST puts its body in TAGBODY; ** SET-EXCLUSIVE-OR sends arguments to :TEST function in the correct order; ** MULTIPLE-VALUE-SETQ evaluates side-effectful places before value producing form; ** if more variables are given to PROGV than values, extra variables are bound and made to have no value; ** NSUBSTITUTE on list arguments gets the right answer with :FROM-END; ** ELT signals an error of type TYPE-ERROR when the index argument is not a valid sequence index; ** LOOP signals (at macroexpansion time) an error of type PROGRAM-ERROR when duplicate variable names are found; ** LOOP supports DOWNTO and ABOVE properly; (thanks to Matthew Danish) ** FUNCALL of special-operators now cause an error of type UNDEFINED-FUNCTION; ** PSETQ now works as required in the presence of side-effecting symbol-macro places; ** NCONC accepts any object as its last argument; ** :COUNT argument to sequence functions may be BIGNUM; (thanks to Gerd Moellman) ** loop-for-as-package does not require a package to be explicitely specified; ** LOOP WITH now treats NIL in the d-var-spec correctly as an ignored binding. * fixed bug 166: compiler preserves "there is a way to go" invariant when deleting code. * fixed bug 172: macro lambda lists with required arguments after &REST arguments now cause an error to be signalled. (thanks to Matthew Danish) * fixed Entomotomy PEEK-CHAR-WRONGLY-ECHOS-TO-ECHO-STREAM bug. (thanks to Matthew Danish) * fixed bug 225: STRING-STREAM is now a class. (reported by Gilbert Baumann) * fixed bug 136: CALL-NEXT-METHOD no longer gets confused when arguments are lexically rebound. (thanks to Gerd Moellmann and Pierre Mai) * fixed bug 194: error messages are now more informative when there is no primary method applicable in a call to a generic function. (thanks to Gerd Moellmann) * fixed bug in command line argument checking (thanks to Julian Fondren) * fixed bug in COUNT-IF, making it handle :FROM-END correctly (thanks to Matthew Danish) * incremented fasl file version number, because of the SXHASH-related changes in the layout of CLOS data structures changes in sbcl-0.7.11 relative to sbcl-0.7.10: * fixed bug 127: DEFSTRUCT now does not clobber old structure accessors that are related by inheritance, as specified in the :CONC-NAME section of the specification of DEFSTRUCT. (thanks to Valtteri Vuorikoski) * The compiler is now able to inline functions that were defined in a complex lexical environment (e.g. inside a MACROLET). * fixed bug in DESCRIBE, which now works on rank-0 arrays. (thanks to Lutz Euler) * Support for the upcoming FreeBSD-5.0 release has been included. (thanks to Dag-Erling Smorgrav) * fixed bug 219: DEFINE-COMPILER-MACRO no longer has compile-time effect when it is not in a toplevel context. * fixed bug 222: DEFMETHOD and SYMBOL-MACROLET interactions now stand a better chance of being correct. (thanks to Gerd Moellmann) * fixed bug in COERCE, which now signals an error on coercing a rational to a bounded real type which excludes the expected answer. * The compiler is now able to derive types more accurately from the COERCE and COMPILE functions. * fixed bug 223: functional binding is considered to be constant only for symbols in the CL package. * fixed bug 231: SETQ did not check the type of a variable being set (reported by Robert E. Brown) * A new optimization for MAKE-INSTANCE has been included, fixing various bugs (including relating to :ALLOCATION :CLASS slots and :DEFAULT-INITARGS over-eager evalueation). (thanks to Gerd Moellmann) * fixed some LOOP bugs revealed by Paul Dietz' test suite: ** As required by ANSI, LOOP now disallows anonymous collection clauses such as COLLECT I in conjunction with aggregate boolean clauses such as THEREIS (= I 1); ** LOOP now signals an error when any variable is reused in the same loop (including the potentially useful construct analogous to WITH A = 1 WITH A = (1+ A); ** IT is only a special loop symbol within the first clause of a conditional loop clause; ** LOOP with a typed iteration variable over a hashtable now signals a type error iff it should. * fixed some other bugs revealed by Paul Dietz' test suite: ** FILE-STREAM now names the class previously known as FD-STREAM; ** in DEFSTRUCT, a bare :CONC-NAME (or a :CONC-NAME with no argument) no longer signals an error; ** likewise in DEFSTRUCT, :CONC-NAME NIL now respects the package of the slot symbol, rather than using the current package ((:CONC-NAME "") continues to intern the slot's name in the current package); * incremented fasl file version number, because of the incompatible change to the DEFSTRUCT-DESCRIPTION structure, and again because of the new implementation of DEFINE-COMPILER-MACRO. changes in sbcl-0.7.12 relative to sbcl-0.7.11: * minor incompatible change: code processed by the "interpreter" or EVAL now has a compilation optimization policy of (DEBUG 2) (changed from (DEBUG 1)) to improve debuggability of interactive development, and to allow the use of the debug RETURN command in such code. * an experimental implementation of the RETURN command for the debugger has been included. (thanks to Frederik Kuivinen) * fixed bug 62: constraints were not propagated into a loop. * fixed bug in embedded calls of SORT (reported and investigated by Wolfgang Jenkner). * fixed some bugs revealed by Paul Dietz' test suite: ** printing and reading of arrays with some dimensions having length 0 (thanks to Gerd Moellmann); ** BOA constructor with &AUX argument without a default value does not cause a type error; ** CONSTANTP now returns true for all self-evaluating objects. changes in sbcl-0.7.13 relative to sbcl-0.7.12: * incompatible packaging change: in line with Unix convention, SBCL now looks for its core file in /usr/{local/,}lib/sbcl/sbcl.core if it's not in $SBCL_HOME. It also sets SBCL_HOME to match. * REQUIRE and PROVIDE are now optionally capable of doing something useful. See the documentation string for REQUIRE. * infrastructure for a managed SBCL contrib system: contributed modules in this release include: ** the ASDF system definition facility; ** an interface to the BSD Sockets API; ** an ACL-like convenience interface to the repl; (thanks to Kevin Rosenberg) ** an implementation of ROTATE-BYTE, with efficient implementation on x86 hardware; * fixed a bug in LOG, so that LOG of a rational argument near 1 now gives a closer approximation to the right answer than previously. (thanks to Raymond Toy) * fixed bug 157: TYPEP, SUBTYPEP, UPGRADED-ARRAY-ELEMENT-TYPE and UPGRADED-COMPLEX-PART-TYPE now take (ignored, in all situations) optional environment arguments, as required by ANSI. * fixed bugs in other functions taking environment objects, allowing calls with an explicit NIL environment argument to be compiled without error. * fixed bug 228: primary return values from FUNCTION-LAMBDA-EXPRESSION are either NIL or suitable for input to COMPILE or FUNCTION. * fixed a bug in DEFSTRUCT: predicates for :NAMED structures with :TYPE will no longer signal errors on innocuous objects. * fixed bug 231b: SETQ is better at respecting type declarations in the lexical environment. * fixed a bug in DEFCLASS: classes named by symbols with no or unprintable packages can now be defined. * fixed a bug in RESTART-BIND: The :TEST-FUNCTION option had been carelessly renamed to :TEST-FUN. (thanks to Robert E. Brown) * fixed compiler failure related to checking types of functions. (reported by Robert E. Brown) * the compiler is now much more consistent in its error-checking treatment of bounding index arguments to sequence functions: in (SAFETY 3) code, errors will be signalled in almost all cases if invalid sequence bounding indices are passed to functions defined by ANSI to operate on sequences. * fixed a bug in the build procedure: documentation of SBCL-specific packages is now preserved and available in the final Lisp image. * lifted FDEFINITION lookup out of loops in the implementation of many list operations. (thanks to Robert E. Brown) * fixed a bug in the reader: the #n# reader macro now works for objects of type STANDARD-OBJECT. (reported by Tony Martinez) * the compiler is now aware that SYMBOL-FUNCTION returns a FUNCTION and that READ-DELIMITED-LIST returns a LIST. (thanks to Robert E. Brown and Tony Martinez respectively) * PCL is now smarter about SLOT-VALUE, (SETF SLOT-VALUE) and SLOT-BOUNDP: in particular, it is now able to optimize them much better, and is now not vulnerable to having packages renamed. Furthermore, a compliance bug has been fixed: SLOT-MISSING is now always called when a slot is not present in an instance. (thanks to Gerd Moellmann) * fixed a bug related to CONCATENATED-STREAMs: PEEK-CHAR will no longer signal an error on unreading a character following EOF on the previous constituent stream. (thanks to Tony Martinez) * fixed some bugs revealed by Paul Dietz' test suite: ** ARRAY-IN-BOUNDS-P now allows arbitrary integers as arguments, not just nonnegative fixnums; ** the logical bit-array operators such as BIT-AND now accept an explicit NIL for their "opt-arg" argument (to indicate a freshly-consed result bit-array); ** ELT now signals an error on an invalid sequence index in safe code; ** the type system is now cleverer about negations of numeric types, and consequently understands the BIGNUM and RATIO types better; ** the type system is now cleverer about the interaction between INTEGER and RATIO types: while bugs still remain, many more cases are accurately computed; ** in TYPECASE, OTHERWISE now only introduces an otherwise-clause if it is in the last clause; ** CONSTANTLY now correctly returns a side-effect-free function in all cases; ** DECLARE is no longer treated as a special-operator; in particular, SPECIAL-OPERATOR-P no longer returns T for DECLARE; * incremented fasl file version number due to the change in the DEFSTRUCT-SLOT-DESCRIPTION structure. changes in sbcl-0.7.14 relative to sbcl-0.7.13: * a better implementation of SXHASH on (simple) bit vectors, measured both in execution speed and in distribution of results over the positive fixnums, has been installed. Likewise, a better implementation of EQUAL for simple bit vectors is now available. * fixed CEILING optimization for a divisor of form 2^k. * fixed bug 240 (emitting extra style warnings "using the lexical binding of the symbol *XXX*" for &OPTIONAL arguments). (reported by Antonio Martinez) * fixed SXHASH, giving different results for NIL depending on type declarations (SYMBOL or LIST). (thanks to Gerd Moellmann) * fixed bug in DEFPARAMETER and DEFVAR: they could assign a lexical variable. (found by Rolf Wester) * SBCL does not ignore type declarations for special variables. (reported by rif on c.l.l 2003-03-05) * some bug fixes in contrib/sb-aclrepl/ * fixed some bugs revealed by Paul Dietz' test suite: ** a bug in the CONS type specifier, whereby the CAR and CDR types got intertwined, has been fixed; ** the type system is now able to reason about the interaction between INTEGER and RATIO types more completely; ** APPEND, [N]REVERSE and NRECONC check that those their arguments, which must be proper lists, are really so; ** An array specialized to be unable to hold elements has been implemented, as required -- yes, really -- by ANSI; ** GETF and GET-PROPERTIES throw a TYPE-ERROR, not a SIMPLE-ERROR, on malformed property lists; changes in sbcl-0.8alpha.0 relative to sbcl-0.7.14 * experimental native threads support (on x86 Linux >=2.4 only). This is not compiled in by default: you need to add :SB-THREAD to the target features. See the "Beyond ANSI" chapter of the manual for details. * fix for longstanding nonANSIism: The old distinction between CL:CLASS objects and SB-PCL:CLASS objects has been eliminated. The return value from CL:FIND-CLASS is now a CLOS class, and likewise that of CL:CLASS-OF; CL:BUILT-IN-CLASS, CL:STRUCTURE-CLASS and CL:STANDARD-CLASS name CLOS classes. * An interface to the MetaObject Protocol, as described in Kiczales, des Rivieres and Bobrow's "The Art of the Metaobject Protocol", MIT Press, 1991, is available from the SB-MOP package. * incompatible change: the SB-PCL package should now be considered a private implementation detail, and no longer a semi-private MOP interface. * minor incompatible change: due to rearrangement for threads, the control stack and binding stack are now allocated at arbitrary addresses instead of being hardcoded per-port. Users affected by this probably have to be doing advanced things with shared libraries, and will know who they are. * minor incompatible change: Previously, all --eval forms used were processed with READ before any of them were processed with EVAL. Now each --eval form is processed with both READ and EVAL before the next --eval form is processed. (Thus package operations like sbcl --eval "(defpackage :foo)" --eval "(print 'foo::bar)" now work as the user might reasonably expect.) * minor incompatible change: *STANDARD-INPUT* is now only an INPUT-STREAM, not a BIDIRECTIONAL-STREAM. (thanks to Antonio Martinez) * minor incompatible change: Y-OR-N-P is now character-oriented, not line oriented. Also, YES-OR-NO-P now works without errors. (thanks to Antonio Martinez) * sb-aclrepl module improvements: an integrated inspector, added repl features, and a bug fix to :trace command. * Known functions, which cannot be open coded by the backend, are considered to be able to check types of their arguments. (fixing a bug report by Nathan J. Froyd) * fixed a bug in computing method discriminating functions: It is now possible to define methods specialized on classes which have forward-referenced superclasses. (thanks to Gerd Moellmann) * fixed evaluation order in optional entries (reported by Gilbert Baumann) * SB-MOP:ENSURE-CLASS-USING-CLASS now takes its arguments in the specified-by-AMOP order of (CLASS NAME &REST ARGS &KEY). * SB-MOP:COMPUTE-EFFECTIVE-SLOT-DEFINITION now takes the required-by-AMOP NAME argument, as well as CLASS and DIRECT-SLOT-DEFINITIONS. (thanks to Kevin Rosenberg) * fixed bug 20: DEFMETHOD can define methods using names that are not the proper names of classes to designate class specializers. * bug fix: INTERACTIVE-STREAM-P now works on streams associated with Unix file descriptors, instead of blowing up. (thanks to Antonio Martinez) * Garbage collection refactoring: user-visible change is that a call to the GC function during WITHOUT-GCING will not do garbage collection until the end of the WITHOUT-GCING. If you were doing this you were probably losing anyway. * fixed bug in MEMBER type: (MEMBER 0.0) is not the same as (SINGLE-FLOAT 0.0 0.0), because of the existence of -0.0 which is TYPEP the latter but not the former. * The compiler issues a full WARNING for calls to undefined functions with names from the CL package. * MAP-INTO for a vector destination is open coded. (reported by Brian Downing on c.l.l) * bug fix: the long form of DEFINE-METHOD-COMBINATION now accepts a documentation string. * fixed some bugs revealed by Paul Dietz' test suite: ** COPY-ALIST now signals an error if its argument is a dotted list. ** Condition slots are now accessed more correctly in the presence of multiple initargs for a given slot. ** The USE-VALUE, CONTINUE and STORE-VALUE functions now correctly exclude restarts of the same name associated with a different condition. ** DEFCLASS of forward-referenced classes with another forward-referenced class in the superclasses list no longer causes an error. ** Condition slots are now initialized once each, not multiple times. (thanks to Gerd Moellmann) ** CONVERT-MORE-CALL failed on a lambda list (&KEY). (thanks to Gerd Moellmann) ** &WHOLE and &REST arguments in macro lambda lists are patterns. ** NSET-EXCLUSIVE-OR does not return extra elements when its arguments contain duplicated elements. ** RESTART-CASE understands local macros. ** RESTART-CASE associates exactly its own restarts with a condition. ** ENDP in safe mode checks its argument to be of type LIST. ** COPY-SYMBOL in a threaded build no longer fails when the symbol in question is unbound. ** Optimized MAKE-INSTANCE functions no longer cause internal assertion failures in the presence of duplicate initargs. ** SLOT-MAKUNBOUND returns the instance acted upon, not NIL. ** Side-effectful :DEFAULT-INITARGS have their side-effects propagated even in the ctor optimized implementation of MAKE-INSTANCE. ** :ALLOW-OTHER-KEYS NIL is now accepted in an initarg list. changes in sbcl-0.8.0 relative to sbcl-0.8alpha.0 * SBCL now builds using CLISP (version of late April 2003 from CVS) as cross-compilation host. * minor incompatible change: the :NEGATIVE-ZERO-IS-NOT-ZERO feature no longer has any effect, as the code controlled by this feature has been deleted. (As far as we know, no-one has ever built using this feature, and its semantics were confused in any case). * SB-MOP:DIRECT-SLOT-DEFINITION-CLASS and SB-MOP:EFFECTIVE-SLOT-DEFINITION-CLASS now have the specified-by-AMOP lambda list of (CLASS &REST INITARGS). * compiler checks for duplicated variables in macro lambda lists. * fixed some bugs revealed by Paul Dietz' test suite: ** the GENERIC-FUNCTION type is no longer disjoint from FUNCTION types. ** &ENVIRONMENT parameter in macro lambda list is bound first. ** SXHASH on condition objects no longer returns NIL. ** :ALLOCATION :CLASS slots are better treated; their values are updated on class redefinition, and initforms inherited from superclasses are applied. ** REMOVE-METHOD returns its generic function argument even when no method was removed. ** SHARED-INITIALIZE now initializes the values of the requested slots, including those with :ALLOCATION :CLASS. planned incompatible changes in 0.8.x: * (not done yet, but planned:) 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.) * (not done yet, but planned:) Inlining can now be controlled the ANSI way, without MAYBE-INLINE, since the idiom (DECLAIM (INLINE FOO)) (DEFUN FOO (..) ..) (DECLAIM (NOTINLINE FOO)) (DEFUN BAR (..) (FOO ..)) (DEFUN BLETCH (..) (DECLARE (INLINE FOO)) (FOO ..)) now does what ANSI says it should. The CMU-CL-style SB-EXT:MAYBE-INLINE declaration is now deprecated and ignored.