5.3.0 - Core libraries - In (chicken process-context posix), the setters for current-user-id, current-effective-user-id and current-group-id now check that the new user/group value is a fixnum instead of blindly passing it on to the C implementation (which would cause bogus user ids to be set). Fixes #1787, thanks to Christopher Brannon. - The srfi-17 module now exports the `getter-with-setter` and `setter` procedures, not just the set! macro (thanks to Lassi Kortela) - Fix hang in chicken-install -update-db on Windows (thanks to Mark Fisher for reporting and Jani Hakala for debugging and patch). - Fixed an inadvertant error during error reporting in the `numerator` and `denominator` procedures when passed non-finite flonums (#1730). - Fixed a bug where optimisations for `irregex-match?` would cause runtime errors due to the inlined specialisations not being fully-expanded (see #1690). - Irregex has been updated to upstream 0.9.10, which fixes behaviour of irregex-replace/all with positive lookbehind so all matches are replaced instead of only the first (reported by Kay Rhodes), and a regression regarding replacing empty matches which was introduced by the fixes in 0.9.7 (reported by Sandra Snan). Also, the http-url shorthand now allows any top-level domain and the old "top-level-domain" now also supports "edu" (fixed by Sandra Snan). Also, a problem was fixed with capturing groups inside a kleene star, which could sometimes return incorrect parts of the match. Finally, "bol" handling was fixed to handle newlines consistently so that multiple matches don't overlap (reported by Sandra Snan). - current-milliseconds has been deprecated in favor of the name current-process-milliseconds, to avoid confusion due to naming of current-milliseconds versus current-seconds, which do something quite different. Also, its definition has been tweaked to guarantee that it returns the time since process startup. On Windows, it will now return sane values after 24 days of uptime. On UNIX, the values returned will be precise to the millisecond instead of rounded down to the nearest second at startup (which would result in erratic startup times). - The default mode for files created by `file-open' has been changed to 0666 (plus whatever change the effective umask applies), rather than 0744 (see #1698). - Fixed type database entry for "log" with second arg (fixes #1725). - Made topological-sort behave better when dependency target is listed multiple times by concatenating dependencies (fixes #1185). - Module system - Reexported macros now work when the reexporting module redefines identifiers from the original (fixes #1757, reported by Sandra Snan). - When using "except" in "import" to omit reexported macros, they are really not imported (#1771, reported by Sandra Snan). - Runtime system - Sleeping primordial thread doesn't forget mutations made to parameters in interrupt handlers anymore. (See #1638. Fix contributed by Sebastien Marie) - A feature corresponding to the word size is available regardless of the word size (#1693) - The default maximum heap size on 64-bit platforms is now the theoretical maximum addressable memory size (#1675). Use -:m if you would like to override this at run-time. - Deprecated C_(a_i_current_)milliseconds in favor of C_(a_i_)current_process_milliseconds to match the Scheme-level deprecation of current-milliseconds. - Officially deprecated C_pair() in favor of C_a_pair(); it has been deprecated for years. - At program cleanup, finalizers are only forced when the live finalizer count is non-zero - The symbol `srfi-87` has been added to the list of built-in feature identifiers. - Garbage collection algorithm has been changed to reduce thrashing when heap is almost full, by growing the heap sooner. A new -:hf option was added to tweak when heap growth should occur. - Added `-:R' runtime option to initialize rand() state deterministically (should help with #1650 and benchmarking). - Compiler - Statically linked programs using built-in libraries are supported again (fixes #1788, a regression from 5.2.0). - Avoid re-using argvector when inline rest operations are being used in CPS calls (#1703, thanks to Jakob L. Keuze). - An `emit-types-file` declaration has been added, which corresponds to the compiler flag of the same name (#1644, thanks to Marco Maggi for the suggestion). - Fixed a bug caused by a bad interaction between two optimizations: argvector rest ops would be applied even if a procedure already got its rest arg consed at the call site (#1756, thanks to Sandra Snan). - Build system - Fix build with tcc. - Fix a few tests on Windows so the suite passes once again. - Auto-configure at build time on most platforms. Cross-compilation still requires PLATFORM to be set, and it can still be provided manually, but it is no longer required in the common case. - Fix Linux to MingW cross-compilation (#1768, thanks to Théo Cavignac) - The `clean' target for make now also removes build configuration files. - The `distclean' target for make has been removed (now `clean' does what `distclean' used to do). - Tools - Fix a problem with egg installation scripts on Windows, where the platform was not correctly identified, depending on the shell used during installation of the core system (thanks again to Mark Fisher for reporting and helping in finding the culprit). - Fixed a bug in chicken-install (#1744) that would cause `Error: (string->number) bad argument type: #!eof` in some cases. - If chicken-install has a program prefix/suffix, it now writes to a cache directory matching its program name (#1713, thanks to Alice Maz) - Fixed bug in chicken-install regarding variable quotation on UNIX-like systems which prevented installation into paths with spaces (#1685). - Fixed a similar bug in chicken-install for paths with spaces on mingw and mingw-msys (#1727, thanks to Josh Helzer for reporting and Vasilij Schneidermann for the patch). - Module system - Fixed a memory leak when calling (import) multiple times in a row on the same module (#1772; reported by "plugd" on IRC). 5.2.0 - Core libraries - Fix `memory-statistics` by returning semi-space bytes and used semi-space bytes like the documentation says. Old implementation returned full-heap size and (full-heap - used-semi-space). - for-each and map now behave consistently in compiled and interpreted mode, like in SRFI-1. They now stop when the shortest list is exhausted instead of raising an exception (fixes #1422). - There is now a srfi-88 module which contains just the three procedures from the (chicken keyword) module defined by the SRFI. - A feature identifier named "srfi-88" is now registered. - The procedures `record-printer` and `set-record-printer!` and a corresponding SRFI-17 setter have been added. These deprecate `define-record-printer` which isn't a "real" definition (see #1294). - On Windows, `decompose-directory` no longer crashes when a drive letter is present in the supplied path string. - irregex-replace[/all] have been fixed for empty matches, so they will no longer drop characters and ignore the replacement (#1661). - Irregex has been updated to upstream 0.9.7, which also improves how empty matches are treated in irregex-fold and irregex-split. - Runtime system - Quoted empty keywords like ||: and :|| are now read like prescribed by SRFI-88 in the corresponding keyword mode. Symbols containing quoted empty prefixes or suffixes like ||:abc and abc:|| will be read correctly as symbols now (fixes #1625, thanks to Andy Bennett). - IEEE floating point negative zero is now properly handled: it can be read, written and distinguished by eqv? and equal?, but not = (fixes #1627, thanks to John Cowan). - ##sys#check-exact and its C implementations C_i_check_exact and C_i_check_exact_2 have been deprecated (see also #1631). - When garbage collector is manually invoked from a finalizer, raise an error instead of hanging forever (fixes #1586). - define-record-type will now give an error if the constructor definition refers to field that's not listed elsewhere (see #1633) - Added new -:hu option to set the memory usage low watermark percentage at which the heap should be shrunk, and changed the calculation to actually reflect this (see #1379). - Compiler - Fixed a bug in lfa2 pass which caused "if" or "cond" nodes to be incorrectly unboxed if the "else" branch had a flonum result type (#1624, thanks to Sven Hartrumpf) - Inline files no longer refer to unexported foreign stub functions (fixes #1440, thanks to "megane"). - In some cases, rest argument lists do not need to be reified, which should make using optional arguments and case-lambda faster (#1623). - Values from foreign types which have an argument or return value converter are no longer inferred to have the Scheme type which corresponds to the raw foreign type, which was incorrect (#1649). - Module system - Trying to export a foreign variable, define-inlined procedure or define-constant variable gives a friendly error instead of saying the variable doesn't exist (fixes #1346). - When modules are registered, they no longer pollute the global environment with imports made in that module (fixes #1548) - Tools - The new "-module-registration" options causes module registration code to always be included in the program, even when it has also been emitted as a separate file (for example with "-J"). - chicken-install now correctly checks server response code to avoid interpreting error response bodies (like 404, 500) as Scheme code. - chicken-install now follows HTTP redirects when downloading eggs. - chicken-install will now change to the correct drive before attempting to change to the egg directory (fixes #1647). 5.1.0 - Core libraries - Symbols ending or starting with a colon are now always pipe-quoted when written by `write` to ensure they can be read back with a different keyword-style setting. - Read-write invariance of special symbols starting with #! other than #!key, #!rest or #!optional is now preserved (#1572). - When using (set-file-position!) on a port, its EOF status will now be reset. - In (chicken file posix), the values of perm/irgrp, perm/iwgrp, perm/ixgrp, perm/iroth, perm/iwoth and perm/ixoth are now correctly defined (they were all for "usr"; #1602, thanks to Eric Hoffman). - In (chicken file posix), `file-truncate` now accepts also accepts port objects, for consistency with other file procedures. All such procedures from (chicken file posix) now have the correct types in types.db (fixes #1609, thanks to Robert Jensen). - Add the system-config-directory and system-cache-directory procedures in the chicken.platform module. These procedures follow the XDG specification and also give sensible results on Windows. - Fix get-environment from (chicken process-context) to raise an error when passed #f instead of segfaulting. - Qualified symbols (##foo#bar style) are no longer encoded by a byte prefix inside the symbol name. This ensures read-write invariance of symbols which start with a low-byte character (fixes #1077, except for keywords, which start with NUL bytes). - Fix a missing export (list->s64vector) in SRFI-4. - Runtime system - Keywords are now distinct types; they are not a subtype of symbols. - Use arc4random on FreeBSD (thanks to Tobias Kortkamp and gahr) - Removed the unused, undocumented (and incorrect!) C functions C_delete_symbol_table and C_set_symbol_table. - Continuations which discard additional values beyond the first no longer accept multiple values via direct invocation after being captured through `call/cc`, only via `values` (revert of #1390, due to #1601) - SRFI-4 vector predicates, reference, set and length procedures should now be faster in tight loops as they're inlineable (#757). - Keywords are now interned in a separate keyword table, not in the standard symbol table. This brings full read-write invariance for symbols (they can now also start with NUL bytes). Keywords no longer have plists. Fixes #1576. - Increased the "binary compatibility version" to 11. - Compiler - Restored optimized implementations of =, +, -, /, * and quotient in fixnum-arithmetic mode (fixes #1604 mostly; thanks to "chickendan"). - Added an optimization pass for reducing the amount of boxing of intermediate floating point values, enabled by the "-lfa2" compiler option. - The "lfa2" pass is now enabled at optimization levels 2 or higher. - Module system - When you try to import the module you are currently defining into itself, an error will be raised. This prevents an infinite loop in the compiler when later trying to import that same module (fixes #1506, thanks to Kristian Lein-Mathisen). - Foreign function interface - Improved hygiene in FFI macro expansions, which means you don't have to import "scheme" or "(chicken base)" for them to work. - Type system - It is now possible to quote free variables in type declarations, which acts as shorthand for `forall' (thanks to "megane") - Tools - csi now uses (system-config-directory) to find csirc and falls back to $HOME/.csirc when needed. - chicken-install now uses (system-config-directory) to find a user defined setup.defaults file ; it also uses (system-cache-directory) for its egg cache directory when the CHICKEN_EGG_CACHE environment variable is not defined. - Egg specifications - Allows "cond-expand" and "error" forms in egg specification files. - Add "c-object" and "object" properties to link separately compiled C objects into CHICKEN code. 5.0.0 - Runtime system - Added support for the full numeric tower, including various new procedures taken from the "numbers" egg. All calculations will now return exact numbers where possible, so code relying on flonums being returned may need to be changed if rational numbers do not provide the desired performance. - Port directionality has been generalized from a simple input/output flag to a bitmap, to allow for multidirectional ports. - Weak symbol GC is faster, simpler, and can now collect all unreferenced symbols instead of a maximum of 997 per major GC. - The -:w option has been removed; symbols are now always collected. - Increased the "binary compatibility version" to 9. - Continuations which discard additional values beyond the first now also accept multiple values via direct invocation after being captured through `call/cc`, not just via `values` (#1390) - Removed the deprecated C_locative_ref and C_mutate2 C functions. - The trace buffer no longer holds on to thread objects, allowing them to be garbage collected sooner (#1356, thanks to Kristian Lein-Mathisen) - On Cygwin and MinGW, the "build-platform" now corresponds to the tool chain used (gnu, clang, unknown) like on *nix, while the software-version is now "cygwin" or "mingw32" instead of "unknown". This also means the features list will now contain the tool chain on all platforms. - Symbols starting with #% are no longer treated specially and need to be quoted with pipes. This makes the "%" sign available for use in custom/user-defined sharp-sign read syntax. - Compiler - Fixed an off by one allocation problem in generated C code for (list ...). - The "-scrutinize" compiler option has been removed. - The "-module" compiler option (aliased as "-m") now expects a module name. - The generated C output of the compiler is now deterministic: it will be bit-for-bit identical when compiling the same Scheme file with the same version of the compiler. - the "-consult-type-file" and "-emit-type-file" options have been renamed to "-consult-types-file" and "-emit-types-file", respectively. - Tools - The new "-link" option to csc allows linking with objects from extensions. - The new "-libdir" option to csc allows overriding the runtime library directory. - The ambiguous "-l" option for csc has been removed (#1193). - Removed deprecated "-n" shorthand for "-emit-inline-file" from csc. - Removed "chicken-bug" tool. - Core libraries - Removed support for memory-mapped files (posix), queues (data-structures), binary-search (data-structures), scan-input-lines (utils), group-information (posix) object-eviction (lolevel), and compile-file (utils). These are now available as eggs. - Removed the srfi-1, srfi-13, srfi-14, srfi-18, srfi-69, and utils units. These are now available as eggs. - Added the `executable-pathname` procedure for retrieving a path to the currently-running executable. - Removed all support for SWIG. - Removed interrupts-enabled declaration specifier. - `sleep` now suspends the current thread when threading is enabled, otherwise it sleeps the process. The new `process-sleep` procedure in unit posix can be used to sleep the process unconditionally. - `with-error-output-to-port' from the ports module has been renamed to the more common `with-error-to-port', and `with-error-to-string' has been added for completeness (thanks to Michael Silver). - A new `make-bidirectional-port' procedure has been added to the ports unit that will combine separate input- and output- ports into a single bidirectional port. - New `input-port-open?` and `output-port-open?` procedures have been added for testing whether a port is open in a specific direction. - An `include-relative` form has been added to the (chicken base) module. This works like `load-relative` but for textual inclusion. - Keywords are now always written in "portable" style by WRITE, so that the reader's keyword style doesn't need to match the writer's. - The environment variable `CHICKEN_PREFIX` has been removed. - Added the `glob->sre` procedure to the irregex library. - Removed the `get-host-name' and `system-information' procedures. These are available in the "system-information" egg. - Removed the `eval-when`, `select` and `ensure` macros. These are available in the "miscmacros" egg. - Removed the require-extension-for-syntax macro. - Renamed bit-set? to bit->boolean because of swapped argument order with respect to SRFI-33 and SRFI-60, which was confusing (fixes #1385, thanks to Lemonboy). - file-{read,write,execute}-access will now raise an exception when the file doesn't exist or some other non-access related problem is detected (fixes #1386, thanks to Vasilij Schneidermann). - `change-file-mode` was renamed to set-file-permissions! and SRFI-17 generalized set! support has been added for `file-permissions`. This procedure now also accepts a file descriptor or a port. - `file-permissions` now returns one value: the permission integer. - `read-file` has been renamed to `read-list`. - `read-all` was dropped, as `read-string` with #f as its NUM argument is equivalent. - `read-lines` and `read-all` no longer accept a string naming a file, only ports. - The procedures for random numbers have been reimplemented; access to system-specific entropy is available, together with a reasonably good pseudo random number generator (WELL512). - `glob` now returns an empty list for non-existent or inaccessible directories, instead of erroring out. - `file-copy' and `file-move' have been renamed to `copy-file' and `move-file', for consistency with `delete-file' and `rename-file'. - `rename-file' now refuses to overwrite an existing file unless an optional "clobber" argument is provided. - The `r4rs` module no longer exports `eval`, which was not in R4RS. - `process`, `process*` and `process-execute` now expect lists of the form (("NAME" . "VALUE") ...) instead of the previous (("NAME=VALUE") ...) as their environment argument. - `repository-path` is now a parameter containing a list of strings instead of a string, as the search path for libraries can now contain multiple directories. - `file-read-access?`, `file-write-access?` and `file-execute-access?` have been renamed `file-readable?`, `file-writable?` and `file-executable?` into the (chicken file) module. - Module system - The compiler has been modularised, for improved namespacing. This means names from the compiler should not leak out into the compiled program's (macro) namespace anymore. - The core units have been converted to modules under the "chicken" namespace. - Added support for list-style library names. - The "use" and "use-for-syntax" special forms have been removed in favor of "import" and "import-for-syntax" to reduce confusion. - Module imports are now lexically scoped: identifiers provided by an (import ...) inside (let ...) won't be visible outside that let. - Modules implementing an interface can now correctly export extra identifiers (bug reported by Martin Schneeweis, fix by "megane"). - Syntax expander - Removed support for (define-syntax (foo e r c) ...), which was undocumented and not officially supported anyway. - Removed support for normal "lambda" forms as syntax transformers, which has been deprecated since 4.8.0. - define and friends are now aggressively rejected in "expression contexts" (i.e., anywhere but toplevel or as internal defines). - define-record and define-record-type now create record types which are tagged with the module in which they're defined, so predicates no longer return #t for records with the same tag defined in another module. This tag is now also available under an identifier that matches the record type name (fixes #1342). - `include` now splices included expressions in the context in which the inclusion appears and does not treat the expressions as toplevel expressions by default. - Eggs management - Egg-installation and building has been completely overhauled. - .meta + .setup files have been merged into a single declarative ".egg" file. - More static checks for egg descriptions, simplified generation of OS-specific build + install commands that is (hopefully) more practical for package maintainers. - Egg sources are cached locally to reduce download and rebuild times. - Dropped many obscure or unimportant options and features from `chicken-install`: (`-keep-installed`, `-reinstall`, `-proxy`, `-no-install`, `-username`, `-password`, `-init`, `-deploy`, `-keep-going`, `-scan`, `-csi`, `-show-depends`, `-show-foreign-depends`, `-prefix`. - Added new "-from-list" option to chicken-install. - Eggs can now be installed and located in multiple directories, using the `CHICKEN_REPOSITORY_PATH` + `CHICKEN_INSTALL_REPOSITORY` environment variables. - Static compilation of eggs is now fully supported and static versions of compiled eggs are available by default. - In a statically built chicken, the egg-tools ("chicken-install", "...-status", "...-uninstall") are still available, but only support static compilation of eggs. - Foreign function interface - The foreign type specifier "ssize_t" is now accepted, and "size_t" arguments now only accept positive integers. Return values of type size_t are no longer truncated on 32-bit platforms. 4.13.0 - Security fixes - CVE-2017-6949: Remove unchecked malloc() call in SRFI-4 constructors when allocating in non-GC memory, resulting in potential 1-word buffer overrun and/or segfault (thanks to Lemonboy). - CVE-2017-9334: `length' no longer crashes on improper lists (fixes #1375, thanks to "megane"). - CVE-2017-11343: The randomization factor of the symbol table was set before the random seed was set, causing it to have a fixed value on many platforms. - Core Libraries - Unit "posix": If file-lock, file-lock/blocking or file-unlock are interrupted by a signal, we now retry (thanks to Joerg Wittenberger). - char-ready? on string ports now also returns #t at EOF, as per R5RS; in other words, it always returns #t (thanks to Moritz Heidkamp) - Unit srfi-4: Fixed typo that broke SRFI-17 generalised set! syntax on s8vectors (thanks to Kristian Lein-Mathisen). - Large literals no longer crash with "invalid encoded numeric literal" on mingw-64 (#1344, thanks to Lemonboy). - Unit irregex: Fix bug that prevented multibyte UTF-8 character sets from being matched correctly (Thanks to Lemonboy and Chunyang Xu). - Runtime system: - The profiler no longer uses malloc from a signal handler which may cause deadlocks (#1414, thanks to Lemonboy). - The scheduler no longer indirectly hangs on to the old thread when switching to a new one, which caused excessive memory consumption (#1367, thanks to "megane"). - C++ programs no longer fail with a symbol lookup error when compiled with debugger support (-d3 or -debug-info). - Syntax expander - Renaming an identifier twice no longer results in an undo of the rename (fixes #1362, thanks to "megane"). - Build system - Fixed broken compilation on NetBSD, due to missing _NETBSD_SOURCE. - Fixed compilation on DragonflyBSD due to no feature macro support in its standard C library (thanks to Markus Pfeiffer). - Compiler - The scrutinizer no longer uses 'fixnum as the type for fixnums that might not fit into a fixnum on 32-bit architectures. - Foreign function interface - Correctly calculate memory requirements of Scheme objects produced from foreign types with "const" qualifiers, avoiding memory corruption (#1424, thanks to Vasilij Schneidermann and Lemonboy) - Do not read beyond temporary stack buffer, which could lead to a crash when returning from a foreign callback (#1428). 4.12.0 - Security fixes - CVE-2016-6830: Fix buffer overrun due to excessively long argument or environment lists in process-execute and process-spawn (#1308). This also removes unnecessary limitations on the length of these lists (thanks to Vasilij Schneidermann). - CVE-2016-6831: Fix memory leak in process-execute and process-spawn. If, during argument and environment list processing, a list item isn't a string, an exception is thrown, in which case previously malloc()ed strings weren't freed. - CVE-2016-9954: Irregex has been updated to 0.9.6, which fixes an exponential explosion in compilation of nested "+" patterns. - Compiler: - define-constant now correctly keeps symbol values quoted. - Warnings are now emitted when using vector-{ref,set!} or one of take, drop, list-ref or list-tail with an out of range index for vectors and proper lists of a definitely known length. - The scrutinizer will no longer drop knowledge of the length of a vector. It still drops types of its contents (which may be mutated). - Fixed incorrect argvector restoration after GC in directly recursive functions (#1317). - "Direct" procedure invocations now also maintain debug info (#894). - Syntax expander - DSSSL lambda lists have improved hygiene, so they don't need the chicken or scheme modules to be imported in full (#806). - The let-optionals* macro no longer needs "quote", "car" and "cdr" to be imported and bound to their default values (#806). - Runtime system: - C_locative_ref has been deprecated in favor of C_a_i_locative_ref, which is faster because it is inlined (#1260, thanks to Kooda). - The default error handler now truncates very long condition messages (thanks to Lemonboy). - Weak symbol GC (-:w) no longer drops random symbols (#1173). - The number of arguments to procedures, both via "apply" and direct invocation, are now limited only by the C stack size (#1098). - "time" macro now shows peak memory usage (#1318, thanks to Kooda). - Avoid crashes in ffi callbacks after GC (#1337, thanks to cosarara). - Core libraries: - Irregex has been updated to 0.9.5, which fixes matching of all "bow" occurrances beyond the first with irregex-fold (upstream issue #14). - Keywords are more consistently read/written, like symbols (#1332). - SRFI-39: When jumping out of a parameterized dynamic extent, "parameterize" now remember the actual values, so when jumping back in, they are restored (fixes #1336, thanks to Joo ChurlSoo). This was a regression caused by the fix for #1227. - Tools: - "chicken-install" - When installing eggs in deploy mode with "-keep-installed", eggs under the prefix won't unnecessarily be reinstalled (#1144). - Added new option "-no-install-deps" which inhibits automatic installation of dependencies, useful with "-prefix" (#1298). 4.11.0 - Security fixes - Specialisation rules for string-{ref,set!}, bit-set? and move-memory no longer use unchecked C functions which could result in undefined behaviour, including buffer overruns (#1216). - Platform support - CHICKEN now supports the Linux X32 ABI (thanks to Sven Hartrumpf). - Tools - Feathers now has a more neutral color scheme and larger font size. - With the -dir option, feathers can now correctly find source code. - Runtime system: - The calling convention of CPS procedures has been changed to use "argument vectors" instead of C calling convention. - The C API of C_values(), C_do_apply() and how to invoke CPS functions has changed. The C_procN() macros have disappeared. The manual example in "Accessing external objects" for C_values has been updated. See also the "numbers" egg for examples on how to support pre- and post-4.10.1 CHICKENs simultaneously. - Apply hack is no longer used; the limitation of 128 arguments has been lifted for platforms which had no apply hack. - Increased the "binary compatibility version" to 8. - Delivery of signals in other OS-level threads is now dealt with in a more robust way (#1232) (thanks to Joerg Wittenberger). - Compiled programs with large literals won't crash on startup (#1221). - Comparisons of closures now behave in a stable way, whether or not the code was compiled with the -no-lambda-info option (#1041). - The signal handling code can no longer trigger "stack overflow" or "recursion too deep or circular data encountered" errors (#1283). - Compiler: - Specializations on implicit "or" types like "number" or "boolean" now work, removing the requirement for the inferred types to match declared types exactly. Specializations are matched from first to last to resolve ambiguities (#1214). - Compiler rewrites for char{<,>,<=,>=,=}? are now safe (#1122). - When requesting to emit import libraries that don't exist, the compiler now gives an error instead of quietly continuing (#1188). - Don't silently truncate huge literals (thanks to Claude Marinier). - Core libraries - try-compile from setup-api cleans up temporary output files (#1213). - SRFI-18: thread-join! no longer gives an error when passed a thread in the "sleeping" state (thanks to Joerg Wittenberger) - SRFI-18: mutex-lock! will not set ownership of mutexes when passed #f as the owner (#1231), not disown a mutex from owner if locking fails for timeout and not keep the last thread which held a mutex until the next lock (thanks to Joerg Wittenberger). - SRFI-39: When a parameter's "guard" procedure raises an exception, "parameterize" now correctly resets the original values of all parameters (fixes #1227, thanks to Joo ChurlSoo). - Irregex has been updated to 0.9.4, which fixes severe performance problems with {n,m} repeating patterns (thanks to Caolan McMahon). - Unit "posix": The following posix procedures now work on port objects: file-stat, file-size, file-owner, file-permissions, file-modification-time, file-access-time, file-change-time, file-type and all procedures using file-type. These are: regular-file?, symbolic-link?, block-device?, character-device? fifo? and socket?. - Unit "posix": When "file-close" is interrupted it will retry, to avoid leaking descriptors (thanks to Joerg Wittenberger). - Unit "data-structures": alist-{update[!],ref} were made consistent with srfi-1 in the argument order of comparison procedures. - Unit "lolevel": locative-ref has been fixed for locatives of u32 and s32vectors (thanks to Joerg Wittenberger for pointing this out). - string->number now signals exceptions if passed a bad base instead of segfaulting (#1272; reported by "Tilpner" on IRC). - Tools - A debugger is now available, known as "feathers", which allows basic source-level debugging of compiled Scheme code. - A statistical profiler has been added, enabling sampling-based runtime profiling of compiled programs. - "chicken-install" - When installing eggs in deploy mode, already satisfied dependencies aren't reinstalled every time (#1106). - "chicken-uninstall" - -prefix and -deploy options were added, matching chicken-install. - "chicken-status" - -prefix and -deploy options were added, matching chicken-install. - The -sudo and -s options for chicken-install and chicken-uninstall now honor a "SUDO" environment variable (thanks to Timo Myyrä). - Syntax expander - Mixed internal define/define-values are now correctly ordered, so later defines can refer to earlier define-values (#1274). 4.10.0 - Security fixes - CVE-2014-6310: Use POSIX poll() on Android platform to avoid potential select() buffer overrun. - CVE-2014-9651: substring-index[-ci] no longer scans beyond string boundaries. - CVE-2015-4556: string-translate* no longer scans beyond string boundaries. - Core libraries - alist-ref from unit data-structures now gives an error when passed a non-list, for consistency with assv/assq/assoc. - Unit tcp now implicitly depends on ports instead of extras. This may break programs which don't use modules and forgot to require extras but use procedures from it. - SRFI-13: fix string-copy! in cases source and destination strings' memory areas overlap (#1135). - SRFI-1: Check argument types in lset and list= procedures (#1085). - Fixed another, similar bug in move-memory! for overlapping memory. - Fixed broken specialisation for move-memory! on pointer types. - Fixed broken specialisation for irregex-match-num-submatches. - Fixed bug in make-kmp-restart-vector from SRFI-13. - Removed deprecated implicit expansion of $VAR- and ~ in pathnames. The ~-expansion functionality is now available in the "pathname-expand" egg (#1001, #1079) (thanks to Florian Zumbiehl). - normalize-pathname has been simplified to avoid adding trailing slashes or dots (#1153, thanks to Michele La Monaca and Mario Goulart). - Unit srfi-4: - write-u8vector has been made more efficient (thanks to Thomas Hintz). - read-u8vector has been made more efficient (thanks to Andy Bennett for pointing this out and testing an improvement). - Unit lolevel: - Restore long-lost but still documented "vector-like?" procedure (#983) - Unit "files": - normalize-pathname no longer considers paths starting with ".//" as absolute (#1202, reported by Haochi Kiang). - Unit "posix": - set-file-position! now allows negative positions for seek/cur (thanks to Seth Alves). - file-mkstemp now works correctly on Windows, it now returns valid file descriptors (#819, thanks to Michele La Monaca). - create-directory on Windows now creates all intermediate directories when passed #t as second parameter. - Runtime system: - Removed several deprecated, undocumented parts of the C interface: C_zap_strings, C_stack_check, C_retrieve, C_retrieve_proc, C_retrieve_symbol_proc, C_i_foreign_number_vector_argumentp, C_display_flonum, C_enumerate_symbols - Removed several deprecated and undocumented internal procedures: ##sys#zap-strings, ##sys#round, ##sys#foreign-number-vector-argument, ##sys#check-port-mode, ##sys#check-port* - SIGBUS, SIGILL and SIGFPE will now cause proper exceptions instead of panicking (thanks to Joerg Wittenberger). - Module system - Allow functor arguments to be optional, with default implementations. - Fixed a bug that prevented functors from being instantiated with built-in modules. - Fixed generation of import libraries for instantiated functors (#1149, thanks to Juergen Lorenz). - Syntax expander - define-values, set!-values and letrec-values now support full lambda lists as binding forms - cond expands correctly when a constant is used in combination with => (thanks to Michele La Monaca) - C API - Removed deprecated C_get_argument[_2] and C_get_environment_variable[_2] functions. - C_mutate2 has been deprecated in favor of C_mutate - chicken.h can be included in C++ programs in strict C++11 mode without compiler errors on Linux (thanks to "Izaak"). - Foreign function interface - The foreign type specifier "scheme-pointer" now accepts an optional C pointer type (thanks to Moritz Heidkamp and Kristian Lein-Mathisen). - Type hinting for foreign-primitives now allows returning multiple values when no return type has been specified. - Compiler - Fixed an off by one allocation problem in generated C code for (list ...). - Build system - MANDIR was renamed to MAN1DIR and TOPMANDIR was renamed to MANDIR in order to comply with standard Makefile practice in UNIX. - INCDIR was renamed to CHICKENINCDIR, and now derives from INCLUDEDIR, which defaults to $(PREFIX)/include - BINDIR, LIBDIR, SHAREDIR, INCLUDEDIR, MANDIR, MAN1DIR, DOCDIR, CHICKENINCDIR and CHICKENLIBDIR will now also be taken from the environment, if present (like PLATFORM, DESTDIR and PREFIX). - Tools - "csc" - On Cygwin, -static now works again (thanks to Michele La Monaca) - "chicken-install" - When using chicken-install -retrieve, and an error occurs during retrieval (or the egg doesn't exist), the egg's directory is now properly cleaned up (#1109, thanks to Alex Charlton) - "chicken" - The -r5rs-syntax option did nothing; this has been fixed. 4.9.0 - Security fixes - CVE-2014-3776: read-u8vector! no longer reads beyond its buffer when length is #f (thanks to Seth Alves). - CVE-2013-4385: read-string! no longer reads beyond its buffer when length is #f. - CVE-2013-1874: ./.csirc is no longer loaded from the current directory upon startup of csi, which could lead to untrusted code execution. (thanks to Florian Zumbiehl) - CVE-2013-2024: On *nix, the qs procedure now single-quotes everything instead of relying on a blacklist of shell characters to be escaped. On Windows, it properly duplicates double-quote characters. (thanks to Florian Zumbiehl) - CVE-2013-2075: Use POSIX poll() in other places where select() was still being used. (thanks to Florian Zumbiehl and Joerg Wittenberger) - CVE-2012-6122: Use POSIX poll() on systems where available. This avoids a design flaw in select(); it supports no more than FD_SETSIZE descriptors. - Core libraries - Fix subvector when the TO optional argument equals the given vector length (#1097) - Unit extras now implicitly depends on ports. ports no longer implicitly depends on extras. This may break programs which don't use modules and forgot to require ports but use procedures from it. - Support has been added for the space-safe R7RS macro "delay-force". - Export file-type from the posix unit (thanks to Alan Post). - SRFI-4 s8vectors now work correctly in compiled code on PowerPC and ARM. - thread-join! now works correctly even if the waiting thread was prematurely woken up by a signal. - unsetenv has been fixed on Windows. - The process procedure has been fixed on Windows. - Nonblocking behaviour on sockets has been fixed on Windows. - Possible race condition while handling TCP errors has been fixed. - The posix unit will no longer hang upon any error in Windows. - resize-vector no longer crashes when reducing the size of the vector. - Distinct types for boolean true and false have been added to the scrutinizer. - Fixed bugs in string-trim-right, string-index-right and string-skip-right, from SRFI-13 - read-line no longer returns trailing CRs in rare cases on TCP ports (#568) - write and pp now correctly use escape sequences for control characters (thanks to Florian Zumbiehl) - posix: memory-mapped file support for Windows (thanks to "rivo") - posix: find-file's test argument now also accepts SRE forms. - numerator and denominator now accept inexact numbers, as per R5RS (reported by John Cowan). - Implicit $VAR- and ~-expansion in pathnames have been deprecated (#1001) - Fixed EINTR handling in process-wait and when reading from file ports. - Irregex is updated to 0.9.2, which includes bugfixes and faster submatches. - Compile-time expansions for "[sf]printf" are slightly more efficient. - Removed the deprecated "always?", "never?", "shuffle" and "none?" procedures. - Fixed problem "make-pathname" that returned an absolute path if given a relative one without a directory argument. - The implementation of promises has been made more efficient. - Removed the deprecated "c-runtime", "null-pointer?" and "pointer-offset" procedures. - The deprecated alias "mutate-procedure" for "mutate-procedure!" has been removed. - On 64-bit systems the feature identifier "64bit" is registered. - "process-fork" accepts an optional argument that specifies wether other threads should be terminated in the child process. - The "signal/bus" signal identifier was missing. - Added setter-procedure for "signal-mask". - Added "recursive-hash-max-length" and "recursive-hash-max-depth" parameters (srfi-69). - Platform support - CHICKEN can now be built on AIX (contributed by Erik Falor) - CHICKEN can now be built on GNU Hurd (contributed by Christian Kellermann) - Basic support has been added for building Android and iOS binaries (see the "README" file for caveats and pitfalls) (contributed by Felix Winkelmann from bevuta IT GmbH) - Added support for 64-bit Windows (consult the "README" file for more information). - Runtime system - finalizers on constants are ignored in compiled code because compiled constants are never GCed (before, the finalizer would be incorrectly invoked after the first GC). (Reported by "Pluijzer") - The call trace buffer is now also resizable at runtime via ##sys#resize-trace-buffer. - C_zap_strings and ##sys#zap-strings (undocumented) have been deprecated. - Special events in poll() are now handled, avoiding hangs in threaded apps. - When invoking procedures with many rest arguments directly (not via APPLY), raise an error when argument count limit was reached instead of crashing. - When the maximum allowed heap size is reached, panic instead of crashing. - The code generated for mutating data destructively is partially inlined and thus slightly more efficient. - Fixed incorrect code in the foreign argument conversion for "unsigned-integer64" (#955). For unsigned-integer, integer64 and unsigned-integer64, disallow floating-point numbers. Fix behavior on 32-bit systems. - On systems that provide sigprocmask(2), segmentation violations, illegal instruction signals, bus errors and floating-point exceptions are now caught and trigger normal error-processing (including a backtrace). The handling of these so called "serious" signals can be disabled by passing the "-:S" runtime option to executables. - Reclamation of unused interned symbols (enabled with the "-:w" runtime option) works much better now. - Build system - The tests can now be run without having to first install CHICKEN. - Fixed a dependency problem that made it impossible to build the distribution tarball on Windows with the mingw compiler. - Increased the "binary compatibility version" to 7. - Tools - "csc" - "-z origin" is now passed as a linker option on FreeBSD when compiling for deployment (thanks to Jules Altfas & Vitaly Magerya) - "-deploy" works now on FreeBSD (thanks to Jules Altfas and Vitaly Magerya), OpenBSD and NetBSD (see README for NetBSD). - added "-oi"/"-ot" options as alternatives to "-emit-inline-file" and "-emit-type-file", respectively; "-n" has been deprecated. - .c/.o files are no longer overwritten when they have the same basename as a Scheme source file (i.e. "csc foo.scm foo.c -o foo" works now). - "chicken-install" - "-deploy" now correctly installs dependencies of deployed eggs under the deployment directory instead of globally. - Full URI syntax is now supported for proxy environment variables (thanks to Michele La Monaca) - "chicken-status" - Added -eggs command line option to list installed eggs - misc - Removed the deprecated "-v" options (use "-version" instead) in various core programs. - The runtime linker path for compiled executables was not set correctly on FreeBSD systems. This has now been fixed. - Removed the deprecated "make" and "make/proc" facility from the "setup-api" module; also removed the deprecated "required-extension-version" and "required-chicken-version" procedures. - Syntax - Added the aliases "&optional" and "&rest" as alternatives to "#!optional" and "#!rest" in type-declarations (suggested by Joerg Wittenberger). - Vectors, SRFI-4 number vectors and blobs are now self-evaluating for R7RS compatibility. Being literal constants, they are implicitly quoted. - For R7RS compatibility, named character literals #\escape and #\null are supported as aliases for #\esc and #\nul. WRITE will output R7RS names. - The CASE form accepts => proc syntax, like COND (as specified by R7RS). - letrec* was added for R7RS compatibility. Plain letrec no longer behaves like letrec*. - Compiler - the "inline" declaration does not force inlining anymore as recursive inlining could lead to non-termination of the compiler (thanks to Andrei Barbu). - Type-analysis ("scrutiny") is enabled by default now, unless "-optimize-level 0" or "-no-usual-integrations" is given. - The "-scrutinize" compiler option has been deprecated. - A new lightweight flow-analysis pass ("lfa2") has been added. Enable by passing the "-lfa2" option to the compiler. - The deprecated options "-disable-warning", "-heap-growth", "-heap-shrinkage" and "-heap-initial-size" have been removed. - Removed the deprecated "constant" declaration. - Removed the deprecated "-lambda-lift" and "-unboxing" compiler options. - Removed the deprecated "-V" compiler option. - Generated names for formal parameters of foreign functions are slightly more informative. - Unused references to variables that name intrinsics can be removed. - In the flow-analysis pass, matching of combinations of "list"/"list-of" and "or" types with has been made more reliable. - Fixed various bugs in the type database. - Syntax expander - added "require-extension-for-syntax" and "use-for-syntax". - Extended syntactic definitions are now available by default in all evaluated code, particularly in code evaluated at runtime in compiled applications. - Removed the deprecated variant "(define-compiler-syntax (NAME . LLIST) BODY ...)" of "define-compiler-syntax". - C API - Deprecated C_get_argument[_2] and C_get_environment_variable[_2] functions. - Removed the deprecated "__byte_vector" type. 4.8.0 - Security fixes - CVE-2012-6125: Improved hash table collision resistance and added randomization to prevent malicious external causes of collisions. All SRFI-69 procedures accept extra arguments to control randomization for testing/debugging. - CVE-2012-6124: On 64-bit machines the "random" procedure no longer truncates result values (which caused very nonrandom results for very large values). Note that random shouldn't be used for security-critical code. - CVE-2012-6123: Added checks for embedded '\0' characters in strings passed to some C functions on a lower level than CHICKEN's FFI. - Build system - version information has been moved into a separate unit to make the build-version shown in the banner and accessible through library procedures more accurate, this also speeds up the build on version- changes (thanks to Jim Ursetto for contributing this) - the build was made more reliable with respect to cross-compilation and custom installation names - the test-suite is now working on the mingw32 platform (with a few tests disabled due to missing functionality) - the version and branch of the sources are now properly compiled into the core libraries and shown in the "csi" and "chicken" version headers - The default target library name for an installation configured for cross- compilation is now "libchicken" and independent on any particular setting of PROGRAM_PREFIX/PROGRAM_SUFFIX (thanks to Otavio Salvador) - Compiler - Fixed bug in handling of symbols in constant-definitions (thanks to Peter Bex) - Stricter check for value-part of constant definition (thanks to Kon Lovett) - Fixed bug that caused argument-signatures of external definitions to be incorrectly modified during optimization (thanks to Peter Bex) - Failing constant-folding expressions now produce a compile-time warning - Fixed various bugs in the internal type-database (thanks to Kon Lovett and Peter Bex) - Fixed incorrect optimization rules for some fp-rounding and fixnum operators - added "-specialize" option and "specialize" declaration which enables optimizations of uses of core library procedures based on type- information gathered during flow analysis - "-optimize-level 3" and higher now implies "-specialize" - added option "-strict-types" and "-emit-type-file" - progress-information is now only shown with "-debug p"; the "-verbose" option only shows informational but noncritical messages - added optimizations for some library procedures - variable propagation for global variable accesses is now done in certain situations - the algorithmic complexity of the closure-conversion pass has been reduced which speeds up compilation noticably for large files - the "-uses" option handles whitespace in unit lists given on the command line (thanks to Santosh Rajan) - the alternative branch in a conditional is dropped when the condition is known to be a non-boolean value (suggested by Joerg Wittenberger) - implemented numerous fixes and improvements for flow analysis - fixed a bug in the compiler that could cause some variable bindings to be optimized away in certain situations involving inlining - added an experimental optimization called "clustering" (enable with the compiler option of the same name) - the optimizations done by the compiler are now listed as a comment in the generated C file - the type-information obtained during flow-analysis ("scrutiny") is now used for performing type-sensitive optimizations of calls to most of the core-library procedures - deprecated the "constant" declaration specifier - "unboxing" optimization has been completely removed - the implementation was unreliable and unmaintainable; the "-unboxing" compiler option will still be accepted but will produce a warning - Peter Bex contributed an optimization to the analysis pass that greatly reduces compile time for source code containing deeply nested lexical bindings - procedures that are known to have the value of a core library procedure that is a "standard" or "extended binding" will be inlined - enhanced line number tracking to get better error messages from the scrutinizer. - hygiene bugs related to compiler-syntax were fixed. - the local flow-analysis was sometimes reporting multiple warnings for the same type-conflict. - the time/space-complexity of some algorithms used in the compiler were reduced resulting in much better compile-times especially for large source files. - Interpreter - ",q" leaves the currently active REPL invocation instead of terminating the process (as suggested by John Cowan) - ",m" properly switches between modules (thanks to Christian Kellermann) - Core libraries - Cleaned up the set of available internal SRFI-feature-identifiers - Fixed bugs in "make-pathname" and "normalize-pathname" (thanks to Jim Ursetto) - The reader is now more consistent when parsing symbol- and keyword names that are fully or partially escaped (thanks to Kon Lovett) - The printer now does a better job at escaping certain single-character symbol names - Unit "lolevel" - deprecated "null-pointer" and "null-pointer?" - Fixed a bug in the Windows implementation of "file-type" (thanks to Jim Ursetto) - Fixed a bug in the implementation of "current-milliseconds" that could result in integer-overflow - Fixed an incorrect type-check in "list-ref" (thanks to Sven Hartrumpf) - Disabled "-setup-mode" when compiling extensions for deployment (thanks to Ivan Raikov) - Got rid of some warnings in the C runtime system that were triggered on the SunPro C compiler (thanks to Joe Python) - Fixed bug in "string->number" that caused out-of-range characters to be accepted for base > 10 (thanks to Jim Ursetto) - added "foldl" and "foldr" procedures, which are more efficient and have a more consistent argument order than the corresponding SRFI-1 procedures - "shuffle" has been deprecated - added "queue-length" - "queue->list" allocates and returns a fresh list now - invoking a parameter-procedure with an argument will return the new value - added new procedure "quit" - port-procedures now check correctly for argument-ports being open (thanks to Peter Bex) - "repl" accepts an optional evaluator procedure (suggested by John Cowan) - added a setter procedure to "signal-handler" ("posix" unit) - EINTR is properly handled for input routines that may block waiting for input - the implementation of R5RS evaluation environments is now fully standards compliant - "file-exists?" and "directory-exists?" work now properly for files > 2GB (EOVERFLOW handling in stat(3) system call) - fixed bug in implementation of "fifo?" - the procedure returned by "condition-predicate" accepts any type of argument now - blobs have a readable textual representation ("#{...}") - "find-files" does not follow symlinks by default (as it did previously) - also, the old non-keyword argument signature for "find-files" is not supported anymore - added "alist-update" ("data-structures" unit) - "irregex-replace" returns the original string instead of #f when the regex does not match - irregex "real" built-in utility pattern now accepts a leading sign - added "change-directory*" ("posix" unit) - number parsing has been made more reliable and standards compliant - deprecated "none?", "always?" and "never?" - library procedures that take ports as arguments now all perform checks on port-direction and open/closed state - "mutate-procedure" has been renamed to "mutate-procedure!" - the old name is still available but deprecated - deprecated C_hash_string and C_hash_string_ci functions in the C API in favor of the more secure versions C_u_i_string_hash, C_u_i_string_ci_hash - a number of bugs in the irregex regular expression engine have been fixed; it has been updated to upstream release 0.8.3 - "with-input-from-file", "with-output-to-file", "with-input-from-pipe" and "with-output-to-pipe" now properly restore the standard input/output ports in case the body thunk escapes - symbols with a single-char print-name where not always properly escaped when printed readably - the "make" facility of the "setup-api" module has been deprecated, please use the "make" extension when your egg requires this during setup. - Core tools - "csc" - The environment-variables "CHICKEN_C_INCLUDE_PATH" and "CHICKEN_C_LIBRARY_PATH" can now be used to add default include- and link-directories to C-compiler invocations - "-O5" passed expensive optimization flags to the C compiler which could expose C-Compiler bugs, depending on the compiler version (thanks to Sven Hartrumpf for pointing this out). - "-rpath" is ignored on OS X (thanks to Kon Lovett). - Fixed handling of "-output-file" (it was being ignored) - "chicken-install" - Added option "-override", which allows retrieving extension- versions from a file - this may be useful to ensure specific versions of a complete set of eggs are installed - Added option "-keep-installed"/"-x" that only installs explicitly named extensions given on the command line, if they are not already installed - Added option "-list" that lists all extensions available - Added option "-csi" to specify what interpreter should be used to execute the setup-script of an installed extension - Added option "-scan" that scans a local directory for the highest available extension versions available - Added option "-reinstall" that reinstalls all currently installed eggs, keeping their versions, if possible - Fixed bug with "chicken-install -test" when multiple extensions where given on the command line (thanks to Kon Lovett) - installing subdirectories works now on Windows. - fixed handling of "-force" when a "chicken" dependency version did not match - added new option "-show-foreign-depends" which lists foreign egg dependencies (if available) - added new option "-show-depends" which lists egg dependencies - added support for "or"-dependencies where a dependency is considered installed if one of a set of candidates is available - "chicken-profile" - fixed some bugs in the profiler and the runtime support code for profiling (thanks to Sven Hartrumpf) - fixed broken percentage calculation (thanks to "megane") - "chicken-status" - Added option "-list" that dumps versions of installed extensions in a format suitable for "chicken-install -override ..." - the "pattern" argument is now actually treated as a pattern and not as a regex - Core syntax - "assert" shows the line number of the form when a second argument is not given or is a literal string - "parameterize" now correctly omits invoking the guard procedure when the old value is restored (thanks to Joo ChurlSoo) - added ":", "the" and "assume" syntax for declaring types - added "define-specialization" form to declare type-driven procedure call rewrites in compiled code - Syntax expander - Fixed a bug that caused imported identifiers to leak into the macroexpansion/compile-time environment (reported by Christian Kellermann) - Fixed a bug in the processing of extended lambda-lists (thanks to Peter Bex) - Peter Bex fixed a bug that caused bound variables to be incorrectly renamed in quoted literals (thanks to Matthew Flatt) - fixed devious bug in the invocation and generation of transformer procedures - using normal "lambda" forms as transformers for local or global syntax definitions is deprecated - one should use "syntax-rules", "er-macro-transformer" or "ir-macro-transformer" from now on - Runtime system - fixed handling of "inf" and nan" floating-point predicates for Solaris (thanks to Claude Marinier) - support for re-loading of compiled files has now been completely removed - the maximum length of strings is no longer limited to a 24-bit number on 64-bit architectures but can be 56 bits. - string-comparison handles embedded '\0' characters. - numerical predicates handle infinity and NaN correctly. - deprecated "[+-]nan", "[+-]inf" and other notations "accidentally" accepted by CHICKEN due to the underlying C library's strtod() function, standardizing on "[+-]nan.0" and "[+-]inf.0" from R6RS (and soon R7RS), when displaying numbers only these forms are generated now. - signals are queued to some extent and the interrupt handling has been cleaned up somewhat - the interpreter handles SIGINT directly - loading the "posix" unit is not needed anymore to handle this feature - changed default nursery size slightly and fixed a bug that caused incorrect (too small) nursery sizes on 64-bit platforms - deprecated the compiler option "-heap-initial-size", "-heap-growth" and "-heap-shrinkage" - the assembly-language stub routine for the implementation of "apply" was broken for Sparc64 systems and has been disabled for this platform - signal masks were accidentally reset upon GC for some platforms; use sigsetjmp/siglongjmp on BSD, Linux, MacOS X and Haiku - Type system - added new type-specifiers "input-port", "output-port", "(list-of T)" and "(vector-of T)" - the type-specifiers "(vector T ...)" and "(list T ...)" represent fixed size lists and vectors now - added qualified types ("forall"), optionally with type constrains - added the "define-type" special form and type-abbreviations - added "compiler-typecase", a compile-time typematching form - Module system - Added "interfaces", which are named groups of exports - Added "functors", which are parameterized modules - Modules can now be aliased - New syntax: (define-interface NAME EXPORTS) (functor (NAME ...) EXPORTS ...) - Extended syntax of "module" for aliasing and functor-instantiation - the "scheme" module has been integrated into the core library and is not installed as a separate import library anymore - added core module "r4rs" containing only bindings for R4RS identifiers - added core module alias "r5rs" for "scheme" module - added "module-environment" which returns an evaluation environment for the bindings of a module - fixed bugs related to using "export"/"reexport" in combination with wildcard ("*") module export lists (thanks to "megane") - Foreign function interface - locatives are allowed as arguments declared "c-pointer" - "int32" was not properly detected as a valid foreign type (thanks to Jim Ursetto) 4.7.0 - Build system - On BSD, libchicken.so is linked with -lpthread, as this seems to be required for linking libraries that require pthreads - The C header-files are now installed in a subdirectory below the "PRFIX/include" directory to allow installation of multiple chickens with different PROGRAM_PREFIX/PROGRAM_SUFFIX settings in the same prefix; to avoid conflicts with existing CHICKEN headers, it is recommended to completely remove any old installation before installing the new version - the PROGRAM_PREFIX and PROGRAM_SUFFIX configuration settings are applied to generated files and directories which allows perform differently named installations into the same PREFIX - increaded binary-compatibility version from 5 to 6, which means installed extensions in an existing installations will have to be re-installed - bugfixes in mingw/msys makefiles - Sven Hartrumpf contributed a bugfix to the internal helper script for creating distribution directories - Peter Bex has cleaned up the makefiles heavily, making the build more maintainable and easier to modify; thanks to all who helped testing this new build - renamed the makefile to `GNUmakefile' to catch using the a make(3) other than GNU make - configuration-header fix for BSD systems (thanks to Peter Bex and Christian Kellermann) - Core libraries - the `regex' library unit has been removed and is separately available as an extension which should be fully backwards- compatible - `irregex' is now a core library unit and replaces the `regex' API - "extras" unit - fixed pretty-printer output of certain escaped character sequences inside strings (thanks to Mario Domenech Goulart, thanks to Kon Lovett for pointing out a missing test-file) - The pretty printer did not escape some control characters correctly (reported by Alan Post) - control-characters in symbol-names are now properly escaped if the symbol is printed readably (thanks to Alaric Snell-Pym for pointing this out) - the deprecated `random-seed' function has been removed - "files" unit - fixed bug in `normalize-pathname' - `file-copy' and `file-move' check whether the source-file is a directory - `delete-directory' now optionally deletes directories recursively - "irregex" unit - Peter Bex has contributed various bugfixes and performance enhancements - "library" unit - Added "condition->list" (thanks to Christian Kellermann) - The reader accepts now escaped octal character codes in string literals - Read-syntax can return zero values to indicate ignored objects - R5RS output output routines now always return a "void" result - "\|" was not correctly escaped when occurring inside symbol print names - added `condition->list', contributed by Christian Kellermann - added `equal=?' - removed deprecated `getenv', `left-section', `right-section', `project', `c-runtime' and `noop' - added missing import-library entry for `vector-copy!' (thanks to Jules Altfas) - circular or excessively deeply nested data generates a more useful error message when encountered by `equal?' - `list-tail' gives now a better error message when passed a non-list argument - fixed bug in `getter-with-setter' that modified the first argument if it already had a setter procedure attached - fixed incorrect size of internal data vector used in `time' (thanks to Kon Lovett) - "lolevel" unit - removed deprecated `global-bound?', `global-make-unbound', `global-ref' and `global-set!' procedures - added support for `pointer-vectors': - make-pointer-vector - pointer-vector? - pointer-vector-length - pointer-vector-ref - pointer-vector-set! - "posix" unit - "close-input-pipe" did not return the status code of a terminated process on Windows (reported by Mario Domenech Goulart) - added `file-creation-mode' (suggested by Mario Domenech Goulart) - "setup-api" unit - `required-extension-version' and `required-chicken-version' have been deprecated - "srfi-18" unit - removed deprecated `milliseconds->time' and `time->milliseconds' procedures - `make-mutex' incorrectly created mutexes as initially owned by the current threads (thanks to Joerg Wittenberger) - the file-descriptor handling in the scheduler has been simplified and performs some sanity checks - deadlock in the scheduler now terminates the process instead of attempting to throw an error - added some sanity checks to the scheduler - "tcp" unit - Fixed bug in "tcp-abandon-port" (reported by Jim Ursetto) - "utils" unit - `compile-file' now returns `#f' when the compilation fails, instead of raising an error - Compiler - Removed unreliable lambda-lifting optimization (now, really!); the "-lambda-lift" option is still accepted but produces a warning - When "-scrutinize" is given, installed ".types" files will be automatically consulted for extensions and used units - Fixed optimizer bug in handling of "let" forms with multiple bindings which could result in toplevel assignments being silently dropped (reported by Moritz Heidkamp) - the `-accumulate-profile' option did not provide a way to specify the target profile data file - now `-profile-name' must always be given when accumulated profiling is done (thanks to Taylor Venable) - added `-module' option, which wraps the code into an implicit module - removed check for unsafe toplevel calls in safe mode - intrinsic handling of `exact->inexact' and `string->number' is now more efficient - fixed bug in leaf-routine optimization (thanks to David Dreisigmeyer) - unit-toplevel entry-points are now named differently, which may break binary-compatibility with existing compiled Scheme code modules - fixed invalid dropping of unused external entry-points in block-mode - fixed incorrect lambda-list check in scrutinizer (thanks to Alan Post) - Kon Lovett reported numerous bugs in the type-database used by the scrutinizer - `-fwrapv' is disabled on OpenBSD, since the default compiler does not support this option (thanks to Christian Kellermann) - on Solaris `gcc' is used by default, override `C_COMPILER' to use the Sun compiler instead - declaring a function `notinline' will prevent direct-call optimization for known procedure calls - the implementation of overflow-detection for arithmetic operations on fixnums have been replaced and now allow using the full 63-bit range of fixnums on 64-bit systems - fixed serious inlining-bug (thanks to Sven Hartrumpf) - constant-folding in the compiler has been simplified and is more reliable (thanks to Sven Hartrumpf) - optimization-levels 3 and higher imply `-unboxing -inline-global' - added new declaration `unsafe-specialized-arithmetic' which allows optimizing unboxed floating-point arithmetic in safe mode - removed `scrutinize' declaration - the warning shown when unimported identifiers are used in compiled modules now also shows the name of the procedure where the identifier is referenced (suggested by Alaric Snell-Pym) - Documentation - Added list of installed files to README - Documented remaining "c...r" standard procedures (thanks to Juergen Lorenz) - The manual is now installed in HTML format in PREFIX/share/chicken/doc, many thanks to Jim Ursetto for contributing is excellent `manual-labor' extension which made this possible - Foreign function interface - Added support for missing "(const [XXX-]c-string)" foreign type (thanks to Moritz Heidkamp) - removed deprecated `pointer', `nonnull-pointer', `byte-vector' and `nonnull-byte-vector' types - added missing result-type handling for `unsigned-integer64' (thanks to Moritz Heidkamp) - added `foreign-type-size' macro - added the new foreign type `size_t' (suggested by Moritz Heidkamp) - added the missing `unsigned-integer64' foreign type (thanks to Moritz for catching this) - added new foreign type `pointer-vector' which maps to `void **' and provided a low-level API in the `lolevel' library unit for manipulating pointer vectors - Runtime system - Fixed typo in "runtime.c" (thanks to Sven Hartrumpf) - Little-endian detection on MIPS systems was not correct (thanks to Christian Kellermann) - Fixed bug in handling of runtime-options with arguments (also reported by Christian Kellermann) - `equal?' does not compare procedures recursively anymore - fixed incorrect use of alloca.h on OpenBSD (thanks to Christian Kellermann and Alan Post) - checks for NaN and infinity are now done using ISO C99 operations, which required various changes to `chicken.h' to make the code compile in ISO C99 mode - remaining debris regarding MSVC builds has been removed - fixed bug in argument-type check for 64-bit integer (thanks to Kon Lovett) - increased default trace-buffer size from 10 to 16 - fixed bug in low-level termination routine (thanks to Jeronimo Pellegrini) - the scheduler handles violations of internal invariants regarding threads slightly more gracefully (thanks to Jim Ursetto) - fixed broken sleep-time conversion (thanks to Karel Miklav) - repaired broken handling of multiple finalizers that referred to the same object (reported by Moritz Heidkamp) - fixed problem with reader and escaping of single-char symbols - Syntax expander - For-syntax syntax definitions where not correctly retained inside modules - Peter Bex fixed various critical bugs in the expander - The simplification for quasiquote expressions was unable to handle certain circular data (reported by Moritz Heidkamp) - `syntax-rules' now supports tail-patterns and is now fully SRFI-46 compatible - many thanks to Peter Bex for implementing this - Peter Bex provided a bugfix for resolution of primitive imports - handling of internal definitions with shadowed defining forms is now done correctly - fix once again from Peter Bex - corrected non-standard behaviour of quasiquote with respect to nested quasiquotations - another bugfix by our mighty macro master - removed stub-implementation of `define-macro' - handled case where a global redefinition of `cons' influenced a non-inlined internal use in the expander (thanks to David Steiner) - `define-record' now allows defining SRFI-17 setter procedures for accessing slots - the expansion of DSSSL lambda-lists uses now `let-optionals*' internally instead of `let-optionals' and so allows back-references to earlier formal variables; this also results in faster and more compact code for argument-list destructuring (thanks to Alan Post) - new "implicit renaming" macro facility contributed by Peter Bex (see `ir-macro-transformer') - parameters are now settable and can be modified using `set!' (SRFI-17) - added a SRFI-17 setter to `list-ref' - added literal blob syntax ("#{ ... }") - Tools - chicken-install - option "-deploy" does not compile deployed extensions with "-setup-mode" anymore to avoid problems with dynamic loading on some platforms (specifically Mac OS X) - option "-deploy" option did not copy the correct library (including the version-number) (thanks to Christian Kellermann) - added support for proxy-authentification (thanks to Iruata Souza) - when installing from a local directory `chicken-install' now removes existing `*.so' files in that location to avoid stale binaries when the `make' syntax is used in setup scripts - chicken-bug - removed disabled e-mail support - csc - removed `-static-extension' option - removed deprecated `-windows' option - fixed incorrect use of `chicken.rc' on non-Windows platforms in `-gui' mode (thanks to "ddp") - when compiling in C++ mode, the compiler will be called with the `-Wno-write-strings' option - `-frwapv' has been added to the default C compiler options - csi - the ",m" toplevel command now accepts "#f" to switch back to the initial empty module context (suggested by Christian Kellermann) - fixed broken `,g' toplevel command - deprecated `script' feature identifier (use `chicken-script' instead) - options `-p' and `-P' and `-e' imply `-no-init' - the call-trace reported will not include exception-handler code anymore (suggested by Christian Kellermann) 4.6.0 - the licenses used in all components of the core system have been collected in the LICENSE file (Thanks to Peter Bex) - Added new compiler option `-no-module-registration' which omits generation of module registration code, even when generation of import libraries has not been enabled - running `chicken' without arguments now hints at the existence of `csi' and `csc' - `caar', `cdar' and `cddr' generate faster code - calls to `list', `vector' and the internal structure allocation primitive that take 1 to 8 arguments generate faster code - `chicken-install' now checks the version of the setup configuration file `setup.defaults' - added option `-exact' to `chicken-status' and `chicken-uninstall', which treats the pattern argument as the literal name of the extension to be listed/deinstalled - `assert' shows line-number information, if available (suggested by Alejandro Forero Cuervo) - interpreted code records the lexical-environment at call- sites, which can in case of an error be inspected with the new `,c', `,f' and `,g' csi toplevel commands - the evaluation-result history in `csi' can be inspected and cleared (to reduce memory load) with the toplevel commands `,h' and `,ch' - unit `data-structures': deprecated `left-section' and `right-section' - fixed bug that caused the static syntax-environment of syntax exported by a module to be incomplete - module `setup-api': Documented the `version>=?' and `extension-name-and-version' proceedures - unit `posix': `utc-time->seconds' is considerably faster on Mac OS X (thanks to Jim Ursetto); added new procedure `file-type' - the `time' macro now shows the correct number of minor garbage collections - the immediate-object check inside the marking procedure of the garbage collector has been manually inlined which results in a significant GC speedup, depending on memory load - unit `srfi-18' and `scheduler': various bugfixes (thanks to Joerg Wittenberger) - unit `srfi-4': bugfix in 8-bit vector allocation routines (thanks to Kon Lovett) - added `-:H' runtime option to dump heap state on exit - fixed missing change in Makefile.cygwin (thanks to John Cowan) - fixed bug in `let-optionals' macro that caused problems when the rest-variable was actually named `rest' (thanks to Alejandro Forero Cuervo) - when Scheme files are translated to C++ or Objective-C, `csc' will register the feature-identifiers `chicken-scheme-to-c++'/ `chicken-scheme-to-objc' ar compile-time - fixed bug in expansion of `#!key' parameters in lambda-lists - debug-output for forcing finalizers on exit goes to stderr now (thanks to Joerg Wittenberger) - the installation routines for extensions automatically add version-number information if none is given in the extension property list (suggested by Alejandro Forero Cuervo) - `standard-extension' accepts `#f' now for the version number and will use the version that has been obtained via `chicken-install' - `fifo?', `symbolic-link?', `directory?', `regular-file?', `socket?', `character-device?' and `block-device?' now accepts file-descriptors or filenames - `find-files' takes keyword arguments, now (including the options to process dotfiles and ignore symbolic links); the old argument signature is still supported but deprecated - removed dependency on `symbol-append' in some macros used in srfi-4.scm to be able to compile the system with older chickens - fixed bug in script that generates development snapshot - added build-variable `TARGET_FEATURES', which can be used to pass extra options enabling or disabling fetures for a system configured for cross-compilation - added compiler and interpreter option `-no-feature FEATURENAME' that disables predefined feature identifiers - code compiled with interrupts disabled will not emit inline files for global inlining since they may execute in a context where interrupts are enabled - the `setup.defaults' file that holds download sources for `chicken-install' now allows aliases for locations - CHICKEN systems build from cross-compilation now by default transparently build and install extensions for both the host and target parts of the cross-compilation setup; the options `-host' and `-target' can now be used to selectively build an extensions for the host- and the target system, respectively - also added `-host' and `-target' options to `chicken-status' and `chicken-uninstall' - `chicken-install' now respects the `http_proxy' environment variable (contributed by Stephen Eilert) - the `srfi-4' library unit has been heavily cleaned up and optimized - optimization-level 3 now enables global inlining - fixed the case that declarations listing global identifiers did not correctly rename them - deprecated `-N' option shortcut for `-no-usual-integrations' option in `csc' - `csi' now offers a toplevel command `,e' for invoking an external editor (suggested by Oivind Binde) - the `describe' command in `csi' now detects many circular lists (contributed by Christian Kellermann) - `csi' doesn't depend on the `srfi-69' library unit anymore - when a closing sequence delimiter is missing or incorrect, the reader also reports the starting line of the sequence - the reader signals an error when a file contains certain characters that indicate that it is a binary file - procedure-information shown by the printer for procedures is now corrected for some library procedures that where missing the correct information; `getter-with-setter' copies procedure-information objects into the newly created accessor procedure, if available - calls to some known pure standard- or extended procedures are removed, if the procedures are called with side-effect free arguments and the result is not used (this can also by enabled for user procedures with the `constant' declaration) - fixed some build-system bugs related to installation - fixed a problem in the C runtime code that prevented it to be compileable without a configuration header-file - the makefile-target to build a bootstrapping `chicken' executable performs multi-stage build now - changed error message when required extension is out of date (thanks to Mario Goulart) - documented library units loaded by default in `csi' (thanks to Moritz Heidkamp) - added `boot-chicken' makefile target to simplify bootstrapping the system from sources and documented this in the README (suggested by Jim Ursetto) - CHICKEN can now be built on haiku (contributed by Chris Roberts) - on Solaris, the system can be compiled with the SunPro C compiler (thanks to Semih Cemiloglu) - removed the `-disable-warnings' compiler option and `disable-warnings' declaration specifier - `fx/' and `fxmod' generate now faster code in safe mode - cleaned up manual pages - slightly optimized variable- and procedure-access - in the compiler `-debug-level 2' implies `-scrutinize' - internal compiler-transformation for `for-each' and `map' apply now with any expression as the procedure argument - the compiler warns about non-intrinsic exported toplevel variables which are declared to be safe - `csc' didn't handle the `-verbose' option (thanks to Mario Goulart) - the `,d' command in `csi' now detects circular lists (thanks to Christian Kellermann) - strings passed to C runtime functions and which are converted to 0-terminated C strings are now checked for not containing embedded `\0' characters (thanks to Peter Bex) - errors in user-defined record printers are caught and shown in the output instead of throwing an error to avoid endless recursion when an error message is printed - a feature identifier named `chicken-MAJOR.MINOR' is now defined to simplify conditionalization of code on the CHICKEN version - `getter-with-setter' copies the lambda-information (if available) from the getter to the generated procedure - `time' uses a somewhat more concise output format and outputs timing information to stderr instead of stdout - added a new chapter on cross-development to the manual - added the `safe-globals' declaration specifier - split up manual chapter `Modules and macros' into two chapters (named `Modules' and `Macros', respectively - suggested by Mario Goulart) - the last 5 non-precompiled regular expressions are now internally cached in compiled form, which speeds up repeated matching of the same uncompiled regular expression dramatically - added the new procedure `yes-or-no?' to the `utils' library unit - added a `bench' makefile target that runs some non-trivial benchmark programs - added `install-target' and `install-dev' makefile target for installing only target system libraries in cross-mode and development files (static libraries and headers) - added `[-]no-procedure-checks-for-toplevel-bindings' compiler option and declaration - usage of unimported syntax in modules gives more usable error messages; in particular, used but unimported FFI forms are now detected - invalid syntactic forms (mostly `()') encountered by the compiler or interpreter show the contextual form containing the expression, or, if indicated by the context warns about missing imports - simplified manual pages of all core tools - they now refer to the output shown by invoking ` -help' - added new option `-feature FEATURE' to `chicken-install' tool to pass feature-identifiers to invocations of `csc' - removed deprecated `-host-extension' option from `chicken-install' - `chicken-status' in a system built for cross-compilation now lists extensions installed in the target prefix, unless the new `-host' option is given on the command line - `chicken-uninstall' in a system built for cross-compilation now removes extensions installed in the target prefix, unless the new `-host' option is given on the command line - added missing entry for `finite?' to the `chicken' module exports - added new procedure `port-closed?' to the `library' unit (contributed by Peter Bex) - added new procedure `symbol-append' to the library unit - the compiler-option `-optimize-level 0' is equivalent to `-no-compiler-syntax -no-usual-integrations` - internal rewritings of `map' and `for-each' ensure correct evaluation order of the arguments and does a better job at detecting non-list arguments (thanks to Jim Ursetto) - `void' now takes arbitrary arguments and ignores them - deprecated `noop' (from the `data-structures' unit) which is now replaced by `void' - the `time' macro now performs a major garbage collection before executing the contained expressions and writes the timings in a more compact format to the port given by `(current-error-port)' instead of the standard output port - definitions of the form `(define define ...)' and `(define-syntax define-syntax ...)' now trigger an error, as required by R5RS (thanks to Jeronimo Pellegrini and Alex Shinn) - deprecated `random-seed' from the `extras' unit, since it is identical to `randomize' - added new procedure `create-temporary-directory' to the `files' unit - deprecated the optional path separator argument to `make-pathname' - slightly improved the performance of keyword argument processing - removed the deprecated `canonical-path' and `current-environment' procedures from the `posix' unit - warnings that mostly refer to programming style issues are now coined `notes' and are only shown in the interpreter or when debug-mode is enabled or when scrutiny is enabled when compiling 4.5.0 - internal fixes of handling of alternative installation-prefix in setup-api - certain compiler-warnings that are in really just notes and don't indicate a possible error (like reimport of identifiers) are only shown with -S or in verbose mode - fixed handling of VARDIR in `chicken-install' (thanks to Davide Puricelli) - `chicken-install -test' doesn't runs tests for dependencies - when a non-else clause follows an else-clause in `cond', `case' or `select' a warning (note) is shown in verbose mode - removed the deprecated `define-extension' and `define-compiled-syntax' - `chicken-uninstall' now always asks before removing extensions, unless `-force' is given - improved performance of keyword-argument processing slightly - `export' outside of a module definition has no effect - `number->string' now accepts arbitrary bases between 2 and 16 (thanks to Christian Kellermann) - fixed `standard-extension' in `setup-api' module - literal constants keep their identity, even when inlined - Unit library: added `fxodd?' and `fxeven?' - All hardcoded special forms have been replaced with syntax definitions that expand into internal forms, this allows redefinition and shadowing of all Scheme core forms - faster implementations of `get' and `put!' - faster implementation of `assq' in unsafe mode - the `-sx' option prefixes each output line with `;' - slightly better expansion performance - more documentation of the C API (thanks to Peter Bex) - `module' supports a shorthand form that refers directly to a file to be included as the module body - added runtime option `-:G' to force GUI mode (on platforms that distinguish between GUI and non-GUI applications) - removed the unsafe runtime library (`libuchicken'), this simplifies and speeds up the build and reduces the risk of executables loading library units from different variants of the runtime system - removed the `-unsafe-libraries' option from `chicken' and `csc' - removed bootstrapping target and bootstrapping files from development repository; to bootstrap the system, either use a release or development-snapshot tarball or fetch a statically linked precompiled `chicken' binary from http://chicken.wiki.br/chicken-projects/bootstrap/ - Jim Ursetto provided some fixes for building universal binaries on Mac OS X - `csc' now compiles and links Windows resource (.rc) files when given on the command line - `chicken-install' and `chicken-uninstall' have an embedded manifest that suppresses the elevation dialog on Windows Vista and later when UAC is activated (Thanks to Thomas Chust) - the `install' program is not used in the build on mingw and mingw/MSYS platforms, since this is broken on older mingw versions - line-number-information is now properly handled (in the few places where it is used) correctly for included files; the source file is given in trace-output in addition to the line number - removed compiler warning for shared objects compiled in unsafe mode - unboxing is now only done in unsafe mode - in unsafe mode, pointer-accessors from the `lolevel' unit are now handled intrinsically by the compiler - `chicken-install' accepts now relative pathnames for the `-prefix' option - `define-record-type' now optionally allows using SRFI-17 setters as record-field modifiers - `integer?' returns `#f' for NaN and infinite numbers - `csc' now has an `-no-elevation' option for embedding a manifest that prevents the elevation dialog on Windows Vista and later when IAC is activated - the `,d' csi command displays qualified symbols properly - symbols starting with the `#\#' character trigger an error when encountered by the reader - Unit posix: `glob->regexp' now always returns a regular expression object or optionally an SRE - Unit posix: `terminal-port?' and `terminal-size' have been implemented for Windows, the latter always returns `0 0', though (thanks to Jim Ursetto) - Unit regex: `regexp' now accepts a regular expression object as argument - Unit regex: removed `glob?' - fixed bug in `chicken-install'/`chicken-uninstall' and `chicken-status' that prevented collapsed command-line options to be handled correctly. - disabled runpath-fix for deployed applications for netbsd (but resurrected providing a runpath at all, thanks to Peter Bex) - Peter Bex provided documentation for the `C_closure' C API function 4.4.0 - the system can now be built with llvm-gcc and/or "clang" (the LLVM C compiler which doesn't use the GNU C frontend) - added new option `-trunk' to `chicken-install', which forces building and installing the development version of extensions in combination with `-t local' - added new option `-deploy' to `chicken-install', which builds extension for use in "deployed" applications (see below) - added option `-deploy' to `csc', the compiler driver. With this option `csc' can build fully self-contained application bundles and double-clickable Macintosh GUI apps; see the "Deployment" manual chapter for more information - the directory given to the `-prefix' option of `chicken-install' may now be a relative pathname. - removed GUI-specific runtime library (`libchicken-gui') from Windows build - GUI- and non-GUI applications now use the same runtime library - special forms of the foreign-function interface have been replaced with an internal form and syntax to allow renaming and shadowing of these forms - the new `-private-repository' option in `csc' compiles executables with the extension-repository path set to the directory from which the program was started - `csc': deprecated the `-W' and `-windows' options, added `-gui' as a platform-independent replacement - `require-extension'/`use' accepts now import-specifications - user-defined extension-specifiers and `set-extension-specifier!' have been removed - `delete-file[*]', `rename-file', `create-directory', `file-copy', `file-move', `delete-directory' and `change-directory' return their argument/destination filename on success - added the missing procedure `condition-variable-name' to the srfi-18 library unit (Thanks to Joerg Wittenberger) - the `glob?' function from the `regex' unit has been deprecated - added the procedure `scan-input-lines' to the `utils' library unit - added new runtime option `-:g' which enables GC debugging output - reclamation of unused symbols in "symbol-gc" mode (`-:w') now only takes place for symbols with an empty property-list - on Windows loading of code compiled with [non-]GUI runtime libraries will fail and produce an error message when the loading executable is linked with a different runtime system - on Windows, GUI libraries were not correctly linked by `csc' - unit posix: added setter for `file-modification-time' - the banner shows the branchname of the build, unless it's "master" - the `-no-install' option to `chicken-install' is ignored when building/installing dependencies - `chicken-uninstall' takes a glob instead of a regular expression as argument - the rename and compare functions for low-level macro-definitions accept now arbitrary s-expressions and renames/compares them recursively - `number->string' handles negative-numbers with bases different from 10 correctly (thanks to Peter Danenberg) - removed deprecated `setup-install-flag' and `setup-verbose-flag' from the `setup-api' module - added new option `-repository' to `chicken-install' (Thanks to Christian Kellermann) - removed `chicken-setup' stub program - fix to `csc' to use the correct library when fixing dynamic load paths (Thanks to Derrell Piper) - removed html documentation from distribution (the wiki manual will now be installed) - fixed bug in `reexport' which caused syntax not to be correctly reexported - previous assignments to a toplevel variable that are separated by side effect free expressions are removed - fixed windows version of `find-files' (thanks to Jim Ursetto) - documentation for extensions is not installed automatically by `chicken-install' anymore - changed binary version from "4" to "5", because the new runtime libraries are not binary-compatible with previous releases; this means all eggs have to be reinstalled and existing programs be recompiled! - added unboxing pass to compiler which results in partially dramatical performance improvements for unsafe floating-point-intensive code; unboxing is enabled on optimization levels 4 and 5 - removed rest-argument-vector optimization as it could conflict with inlining (thanks to Sven Hartrumpf) - renamed `pointer-offset' to `pointer+' and deprecated `pointer-offset' - toplevel assignments that have no other side-effects can be eliminated if it can be shown that the value is not used (the compiler will generate a warning in this case) - removed deprecated `-quiet' option in `chicken' program - removed deprecated `run-time-macros' declaration - removed deprecated `-v2' and `-v3' options in `csc' program - removed deprecated `list-of' function (it is exclusively available as `list-of?' now) - removed deprecated `stat-...' functions in posix library unit - removed deprecated `for-each-line' and `for-each-argv-line' procedures in utils library unit - added `fpinteger?' and `fpabs' - deprecated `define-compiled-syntax' - added new floating-point primitives `fpsin', `fpcos', `fptan', `fpasin', `fpacos', `fpatan', `fpatan2', `fpexp', `fplog', `fpexpt' and `fpsqrt' - heavy cleanup of floating math functions which gives much better performance, especially for code compiled in unsafe mode - calling `assert' with a single argument shows the tested expression on failure - various bugfixes and cleaning up 4.3.0 - fixed bug in `move-memory!' that caused negative offsets to be accepted (thanks to Jim Ursetto) - removed tracing facility and apply-hook (see the "trace" egg for a replacement for tracing and breakpoints) - chicken-install(1): renamed `-host-extension' option to `-host' - added support for a make(1) configuration file ("config.make") - `chicken-install' now allows specifiying a proxy for retrieving extensions over HTTP (thanks to Nicolas Pelletier) - fixed bug in `cond-expand' that incorrectly renamed feature-identifiers if the form was the product of a syntax expansion (reported by Thomas Bushnell) - import-libraries are only generated by the compiler if they don't exist yet and if the content has actually changed (this simplifies makefile- rules in some cases) - it is now possible to pass a config-file to `make(1)' instead of specifying all build-options as variables on the command-line (see README) - removed compiler options for "benchmark-mode" and replaced them with a new optimization level (5) (note that `-O5' does not imply fixnum mode anymore) - `hen.el' and `scheme-complete.el' are not bundled with the core system anymore - `hen.el' is currently not maintained, and `scheme-complete.el' has its own release cycle; both files are available, see http://chicken.wiki.br/emacs - removed meaningless benchmark suite and cleaned up - added optional argument to `grep' that allows applying a function to each matched item (contributed by Tony Sidaway) - added extension-property `import-only', which makes it possible to create extensions that have no runtime part - the argument to `seconds->string', `seconds->utc-time' and `seconds->local-time' is now optional and defaults to the value of `(current-seconds)' (suggested by Mario Goulart) - removed read-syntax for `syntax' form - fixed bug in `get-condition-property' - fixed bug in windows version of `process-execute' - TCP timeouts throw exception of kind `timeout' to allow distinguishing between timeouts and other errors - removed some internal functions that manipulate environments - fixed bugs in `standard-extension' (`setup-api' module) and added keyword arguments for building static extensions and adding custom properties - when cross-compiling, `chicken-install(1)' doesn't pass `-setup-mode' (the host tools should not attempt to load target binaries) - `installation-prefix' in the `setup-api' module was not always correctly set - the `-force' option in `chicken-install(1)' overrides the CHICKEN version check - disabled e-mail feature in `chicken-bug(1)', since it doesn't work anyway, in the moment - fixed bug in `reexport' that made it impossible to reexport core library definitions - fix in optimizer that sometimes caused C functions for inlined procedures to be emitted multiple times (Thanks to Joerg Wittenberger) - documented `define-compiler-syntax' and `let-compiler-syntax' - printer for hash-tables shows current number of stores items - when upgrading during installation of a dependency `chicken-install' shows the version to upgrade to (Thanks to Christian Kellermann) - Updated scheme-complete (Thanks to Alex Shinn) - fix for pathnames with whitespace in 'runtests.sh' on Windows - fix for 'normalize-pathname' with absolute pathname argument - added 'decompose-directory' to unit files - fix for 'local-timezone-abbreviation' - wasn't using the current time so tz-name constant - deprecated 'make-pathname' separator argument 4.2.0 - added compiler option `-emit-all-import-libraries' - added `reexport' - added compiler and interpreter option `-setup-mode' - various minor performance improvements - fix for 'create-directory' when parents wanted - `for-each-line' and `for-each-argv-line' have been deprecated - chicken-install tries alternative servers if server responds with error - fixed load bug (ticket #72) - new library procedure `get-condition-property' - many mingw build fixes (thanks tp Fadi Moukayed) - setup-api: deprecated `cross-chicken' (use `cond-expand' or `feature?' instead) - added topological-sort to data-structures unit; chicken-install sorts dependencies before installing them - "-optimize-level 2" enables inlining by default - disable executable stack in assembly code modules (patch by Zbigniew, reported by Marijn Schouten) - csc now always exits with a status code of 1 on errors (patch by Zbigniew) 4.1.0 - The new parameter "parantheses-synonyms" and the command-line option "-no-parantheses-synonyms" allow disabling list-like behaviour of "{ ... }" and "[ ... ]" tokens - The new parameter "symbol-escape" and the command-line option "-no-symbol-escape" allows disabling "| ... |" symbol escape syntax - Added command-line option "-r5rs-syntax" to disable CHICKEN-specific read-syntax - Removed "macro?" and "undefine-macro!" - Support for Microsoft Visual Studio / MSVC has been dropped - The compiler provides now a simple flow-analysis pass that does basic checking of argument-counts and -types for core library procedure calls (new option "-scrutinize") - New compiler-options "-no-argc-checks", "-no-bound-checks", "-no-procedure checks", "-no-procedure-checks-for-usual-bindings", "-types TYPEFILE" and "-consult-inline-file FILENAME" - Added a "chicken-setup" stub-application to catch incorrect use of this tool (which has been replaced in 4.0.0 with "chicken-install") - Changed "setup-install-flag" and "setup-verbose-flag" to "setup-install-mode" and "setup-verbose-mode" in "setup-api" module, the old names are still available but deprecated - Posix unit: added "socket?", "block-device?" and "character-device?", deprecated redundant "stat-..." procedures - Added "directory-exists?" - "(for-each (lambda ...) X)" is compiled as a loop - The argument-count check for format-strings for "[sf]printf" with a constant string argument is done at compile-time 4.0.0 - removed `apropos' and `apropos-list' from the "utils" library unit; available as an extension - removed texinfo and PDF documentation - this will possible be added back later - replaced PCRE regex engine with Alex Shinn's "irregex" regular expression package - removed `-extension' option - removed `-static-extensions' csc option and added `-static-extension NAME' - `regex' unit: removed `regexp*' and `regex-optimize' - added `CHICKEN_new_finalizable_gc_root()' - `length' checks its argument for being cyclic - removed custom declarations and "link-options" and "c-options" declarations - deprecated "-quiet" option to "chicken" program - added "-update-db" option to chicken-install - the compiler now suggests possibly required module-imports - moved non-standard syntax-definitions into "chicken-syntax" library unit - the pretty-printer prints the end-of-file object readably now - alternative conditional execution paths have separate allocation computation (previously the allocation of all alternatives was coalesced) - removed unused "%kmp-search" from "srfi-13" library unit - expander handles syntax-reexports and makes unexported syntax available for exported expanders in import libraries - added checks in some procedures in the "tcp" library unit - the macro system has been completely overhauled and converted to hygienic macros - a macro-aware module system has been added - added "-sx" option to csi - removed the following deprecated functions: [un]shift! andmap ormap byte-vector? byte-vector-fill! make-byte-vector byte-vector byte-vector-set! byte-vector-ref byte-vector->list list->byte-vector string->byte-vector byte-vector->string byte-vector-length make-static-byte-vector static-byte-vector->pointer byte-vector-move! byte-vector-append! set-file-position! set-user-id! set-group-id! set-process-group-id! macro? undefine-macro! - the situation-identifiers "run-time" and "compile-time" have been removed - the compiler options "-check-imports", "-import" and "-emit-exports" have been removed - new procedures: strip-syntax expand - new macros define-syntax module export - the following macros have been removed: define-foreign-record define-foreign-enum define-macro define-extension - "local" mode, in which locally defined exported toplevel variables can be inlined - new options and declarations "[-]local", "[-]inline-global" and "-emit-inline-file" - optimization levels changed to use inlining: -optimize-level 3: enables -inline -local (but *not* -unsafe) -optimize-level 4: enables -inline -local -unsafe - increased default inlining-limit to 20 - support for cross-module inlining - "make bench" runs the benchmark suite - "chicken-setup" has been replaced by new command line tools "chicken-install", "chicken-uninstall" and "chicken-status", which are more flexible and allow greater freedom when creating local or application- specific repositories - extension-installation can be done directly from SVN repositories or a local file tree - enabled chicken mirror site as alternative download location