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NEWS
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Overview of changes from 0.9.0 to 0.9.1
=======================================
* Improvements
* Simplify getcontext() detection
[GitHub#3][Patch by NIIBE Yutaka]
* Add support for GNU Hurd
[GitHub#5][Patch by NIIBE Yutaka]
* Update the bundled libgcroots to 0.3.2
* Fixes
* Fix test directory
[Reported by OBATA Akio]
* Thanks
* NIIBE Yutaka
* OBATA Akio
Overview of changes from 0.8.6 to 0.9.0
=======================================
* Just updating packaging system
Overview of changes from 0.8.5 to 0.8.6
=======================================
* Just update configure script
Overview of changes from 0.8.4 to 0.8.5
=======================================
* Specification changes
- Support colon separated multiple load paths with scm_set_lib_path().
Overview of changes from 0.8.3 to 0.8.4
=======================================
* Fixes
- Fix alignment check on x86_64 when --enable-debug is set (bug #26950).
- Fix test-storage.c
Overview of changes from 0.8.2 to 0.8.3
=======================================
* Fixes
- Disable some GC protection tests that produce indifinite result on make
check
- Re-enable following unintentionally disabled tests
* test-format.c
* test-storage.c
Overview of changes from 0.8.1 to 0.8.2
=======================================
* Specification changes
- test-report-result exits with error code 70 (EX_SOFTWARE) if some tests are
failed
* Fixes
- Fix bogus result of 'make check'. 0.8.1 and earlier passes all tests even
if some tests are failed
Overview of changes from 0.8.0 to 0.8.1
=======================================
* Specification changes
- [R6RS] Remove the escape sequence "\|" invalidated in final R6RS
* Fixes (also fixed in 0.7.6)
- [CRITICAL] Fix memory alighnment issue in symbol name.
- [CRITICAL] Fix possible bug in string buffer.
- Plug possible memory leak.
- Fix make test in test-string-cmp.
- Fix compilation on Mac OS X 10.5
- Support OpenBSD PowerPC and x86_64 in libgcroots
Overview of changes from 0.7.x to 0.8.0
=======================================
* New features
- SRFI-0 Feature-based conditional expansion construct
- SRFI-1 List Library (full featured)
- SRFI-9 Defining Record Types
- SRFI-43 Vector library
- SRFI-55 require-extension
- SRFI-69 Basic hash tables
- SRFI-95 Sorting and Merging
- R5RS promises (delay and force)
- Legacy define-macro with some limitations (see spec.txt)
- New syntax let-optionals* compatible with Gauche, for optional argument
processing
- New C interface functions scm_array2list() and scm_list2array()
- unittest.scm is now installed as a library. And some SRFI-64 compatible
assertions are added. It is a temporary solution and will be replaced with
full SRFI-64 implementation in future release
- %%require-module and scm_require_module(). 'use' and scm_use() have been
deprecated and will be removed in SigScheme 0.9.0
- System-installed libraries written in Scheme are introduced. And to manage
them, scm_set_system_load_path() and %%system-load-path have been added
- New character codec related procedures %%current-char-codec,
%%set-current-char-codec!, with-char-codec and %%string-reconstruct!
- New port handling procedures %%current-error-port,
%%set-current-input-port!, %%set-current-output-port!,
%%set-current-error-port!
- New debugging procedures %%pair-mutable?, %%string-mutable?,
%%vector-mutable?
- New procedure sscm-version for version information
* Specification changes
- SRFI-75 characters have been turned into R6RS (R5.92RS) characters,
including configuration names
- Make Shift_JIS encoding name (CES) and Unicode CCS names of the codec API
proper
- Accept any non-ASCII singlebyte values on integer->char, make-string and
string-fill! when !SCM_USE_MULTIBYTE_CHAR
- Replace implicit filler value ' ' for make-string with '?' to avoid wrong
assumption by user
- make-string, string-fill! and vector-fill! now returns SCM_UNDEF instead of
the modified object
- Second argument argv is added to scm_initialize() and thus incompatible
with 0.7.x.
- [R5RS] R5RS hygienic macros is disabled by default in all configurations
but 'dev' since it has a considerable bug (such as infinite loop on
test-srfi1-another.scm)
- call-with-input-file, call-with-output-file, with-input-from-file and
with-output-to-file are re-implemented in lib/sigscheme-init.scm. The
standard current ports handling on with-input-from-file and
with-output-to-file are now continuation-safe by dynamic-wind
- Continuation implementation now uses sigsetjmp(3) and siglongjmp(3) if
available
* Fixes
- [CRITICAL] Fix unterminated string generation on singlebyte character codec
- [R5RS] Fix multiple values inacceptance of call-with-values continuation
such as (receive (x y) (call/cc (lambda (k) (k 0 1))))
- [SRFI-38] Fix broken execution by misinitialized internal hash table
- Fix string-length on multibyte string invalidly counted based on current
char codec. It is inconsistent with string length recorded in string object
- [R5RS] Fix error on (integer->char 0) on non-Unicode codecs
- [R6RS] Fix invalid Unicode character acception on integer->char
- Fix unexpected memory exhaustion on negative length on make-string
- [SRFI-2] Fix body-less forms rejection on and-let* such as (and-let* ())
- [R5RS] Fix overflow error by a long number on string->number with #f
- [R5RS] Fix invalid assertion on modifying optional arguments to a dotted or
circular list (see test-misc.scm). This bug only appeared on --enable-debug
- Fix reading unterminated quote as (quote #<eof>)
- [SIOD] Fix defining '=' as SIOD-compatible version regardless of
--enable-compat-siod-bugs
* Others
- New document multibyte.txt about multibyte character processing has been
added
- Code validation for R5RS characters, all R5RS string procedures, R5RS
vectors, SRFI-2, SRFI-8 and Multibyte character processing have been done
and now can be used for production codes
- SRFI-1 List Library is partially validated, but expected as usable quality.
Though C part is fully validated, the Scheme part imported from the
reference implementation of SRFI-1 is not fully validated. See
test/test-srfi1-another.scm for validation status. The procedures that not
validated only have header comment such as ";; delete-duplicates" in the
file.
Overview of changes from 0.7.5 to 0.7.6
==
* Fixes
- [CRITICAL] Fix memory alighnment issue in symbol name.
- [CRITICAL] Fix possible bug in string buffer.
- Plug possible memory leak.
- Fix make test in test-string-cmp.
- Fix compilation on Mac OS X 10.5
- Support OpenBSD PowerPC and x86_64 in libgcroots
Overview of changes from 0.7.4 to 0.7.5
==
* New features
- Add SIOD compatibility about syntax 'if'.
- Revise the SRFI-75 support into R6RS (R5.92RS) characters.
Overview of changes from 0.7.3 to 0.7.4
==
* New features
- %%prealloc-heaps procedure for memory consumptive applications
Overview of changes from 0.7.2 to 0.7.3
==
* Fixes
- [CRITICAL] Fix broken libgcroots compilation on SPARC and IA-64 (NIIBE
Yutaka)
- Fix broken eval_state passing in call() on possible configurations that
(sizeof(ScmObj) != sizeof(void *))
- Fix some build problems
- Suppress warnings
Overview of changes from 0.7.1 to 0.7.2
==
* Fixes
- [CRITICAL] Fix broken libgcroots (Etsushi)
- Fix distribution making procedure
- Fix '-no-cpp-precomp' warning on gcc
- Change To: mail address of make-report.sh which does not have size
limitation
Overview of changes from 0.6.1 to 0.7.1
==
* New features
- All particular language features and behaviors have become configurable via
--enable and --disable options of the configure script, with automated
feature dependencies resolution and conflict detection
- The Cutter-based C testing framework has been replaced with the new
framework developed by Jun Inoue. Simply type 'make check' to run the
tests. All of old contents of test-c/ have been removed, and test-c2/ has
been renamed to test-c/. Be careful to read old logs.
- "internal definitions" and "strict toplevel definitions validation"
features have been configurable
- Add optional duplicate variable check to 'let', 'let*', 'letrec' and 'do'
(it is not required by R5RS)
- [R6RS] R6RS (R5.91RS) compatible 'fixnum-width' procedure
- SSCM_VERSION_REQUIRE() macro
- Add pkg-config support
* Specification changes
- [R5RS] Remove 'delay' and 'force' (temporarily) since they completely
violates R5RS definitions
- [R5RS] Proper tail recursion conformance of 'eval' has been marked as
'uncertain'
- [SRFI-23] Display error message and optional objects as same as the
reference implementation of SRFI-23
- [SRFI-34] Add 'current handler' to error object to behave as same as the
reference implementation of SRFI-34 'raise'
- [SRFI-77, R6RS] The SRFI-77 procedures 'least-fixnum' and 'greatest-fixnum'
have been upgraded to R6RS (R5.91RS) (nothing is actually changed)
- The API for function call with GC-ready stack has been changed to resolve
corrupted GC problem on SPARC and IA-64. It needs API change
- Definition of dotted list length is changed to SRFI-1's from
SigScheme-speciific one. SCM_LISTLEN_DOTTED(), SCM_DOTTED_LISTP() and other
dotted list-related macros and functions have been changed so
- Remove initial hyphen support for symbols (such as '-sym). Use
(string->symbol "-sym") instead
- Remove SIOD-compatible external representation of eof value '(eof)'
- (scm_set_lib_path): Change to holding copied library path string
- (scm_return_value): Removed
- Change the low-level port API to fix the design error about error handling
(get_byte() and peek_byte() were not able to detect read error)
- Withdraw sigscheme-stdint.h. Use scmint.h instead
- The --enable-configuration=CONF option of the configure is renamed to
--enable-conf=CONF
- The --enable-multibyte=ENCODING option of the configure is replaced with
--enable-default-encoding=ENCODING, and --enable-ENCODING options are also
added
* Fixes
[R5RS] and [SRFI-n] tags indicate specification conformance fixes.
- [CRITICAL] Fix crashes by broken va_list passing of format.c on x86_64
platform
- [CRITICAL] Fix corrupted GC on some architectures such as SPARC and IA-64
with libgcroots
- [CRITICAL] Fix crashes by corrupted GC mark on stack on specific platforms
that have (alignof(ScmObj) < sizeof(ScmObj)), such as m68k
- [CRITICAL] Fix potential SEGV on long string parsing
- [CRITICAL] Fix possible crash on parsing R5RS-reserved chars |[]{}
- [CRITICAL] Fix broken GC on systems that have 8-byte aligned malloc(3) such
as Cygwin
- [CRITICAL] Fix broken 64-bit data model capability of storage-compact
- [CRITICAL] Fix broken ScmBaseCharPort inheritance of ScmSingleByteCharPort
which may cause SEGV
- [R5RS] Fix invalid acceptance of definition form on where neither toplevel
nor internal definition is allowed
- [R5RS] Fix invalid acceptance of 'begin' that contains definitions and
expressions intermixed
- [R5RS] Fix invalid acceptance of <body> that contains definitions and
expressions intermixed on 'let', 'let*', 'letrec' and function form
'define'
- [R5RS] Fix syntactic keyword to value evaluation that only bound to syntax
or macro (i.e. (eq? if and) has been invalidated). But binding syntactic
keywords to first-class objects such as (define else 3) and (define do 4)
are still allowed
- [R5RS] Fix first-class binding objects acceptance of let-syntax,
letrec-syntax and define-syntax
- [R5RS] Fix invalid no-expressions <body> acceptance of 'let', 'let*',
'letrec' and function form 'define'
- [R5RS] Fix invalid acceptance of binding syntactic keyword as value on
'define', 'let', 'let*', 'letrec' and 'do'
- [R5RS] Fix broken per-iteration env isolation of 'do'
- [R5RS] Fix proper tail recursion incapability of '=>' form of 'cond'
- [R5RS] Fix invalid acceptance of cond-like '=>' form of 'case' which is not
defined in R5RS
- [R5RS] Fix broken result of 'modulo' on no-remainder cases
- [R5RS] Fix improper list acceptance on single-arg map
- [R5RS] Fix improper tail recursion of call-with-values on a corner case
- [R5RS] Fix broken improper tail handling of 'list-ref'
- [R5RS] Fix improper list acceptance of 'reverse'
- [R5RS] Reject invalid number strings such as "0xa" and " 1" on
'string->number'
- [R5RS] Reject invalid number literals such as "#x0xa"
- [SRFI-38] Fix inacceptance of optional 'optarg' argument of
'write-with-shared-structure'
- [SRFI-48] Fix optional port argument inacceptance of 'pretty-print'
- [SRFI-48] Fix broken number prefix acceptance such as "~,f", "~1,f", "~,1f"
- [SRFI-60] Fix invalid result of (logand). Now it returns -1 as same
as the reference implementation
- [MAJOR] Add lacking or incomplete error handlings for port operations
- [MAJOR] Fix incomplete singlebyte character support
- [MAJOR] Fix broken sign extention for 8-bit char on string port read
- [MAJOR] Fix broken out of range error detection of string->number which
fails every conversion once after the error has occurred
- [MAJOR] Fix possible crash on parsing script prelude longer than 64 chars
- [MAJOR] Fix possible crash on parsing script prelude that only has
"#! /usr/bin/env"
- [MAJOR] Fix a broken error handling on character encoding switching when
!SCM_USE_MULTIBYTE_CHAR
- [MAJOR] Fix infinite loop on raising error objects that contain circular
list when SCM_USE_HYGIENIC_MACRO
- [MAJOR] Fix compile error on environments that lacks stdint.h -compatible
definitions
- [MAJOR] Fix missized-cast of 'quotient' which results a broken value on
64-bit configurations
- [MAJOR] Fix broken evaluation of quasiquoted vectors splicing with improper
list
- [MAJOR] Fix 64-bit capability of quasiquoted vectors
- [MAJOR] Fix passing circular list into error object when SRFI-38 is not
enabled
- Fix '0' prefix incapability on a maximum-length binary number literal. See
"R5RS conformance: Numbers: Literals" subsection of doc/spec.txt for
further details
- Fix possible crash of the broken GC protection on initialization
- Fix a broken type handling appeares on (equal? macro1 macro2) on
storage-compact
- Fix broken procedure invocation appears on a minor build configuration
- Fix broken body result of %%closure-code when body-length == 1
- Fix possible datum index overflow of SRFI-38 write/ss on 64-bit platforms
- Fix acceptable pathname length of a script name of sscm command previously
one char lesser than maximum
- Fix broken aggregated global variables handling
- Fix writable static data feature dependency
- Fix broken max heap size configuration
- Fix crashes on 'make check' in test-c2/ on x86_64-unknown-linux-gnu
- Fix unwanted test-c2/*-coll.c removal on --disable-maintainer-mode
* Others
- The maintainer of the software has been succeeded by YAMAMOTO Kengo a.k.a
YamaKen
Overview of changes from 0.5.0 (r3097 + private modifications) to 0.6.1
==
* New features
- Support R5RS hygienic macros
- Support format strings (covers SRFI-28 and SRFI-48)
- Add global symbol exportation control method in portable way (see
doc/global-obj.txt)
- Add experimental support for embedded platforms that lack writable static
data, such as BREW or Symbian OS (see doc/global-obj.txt)
* Fixes
- Make installed libsscm and header files workable
Overview of changes from 0.5.0-alpha (r2902 + private modifications) to 0.5.0
==
* New features
- Support 64-bit data models (storage-compact is not yet)
- Add lacking character predicates and complete all R5RS character procedures
- Add lacking string predicates and complete all R5RS string procedures
- Support constant list (storage-compact does not)
- Support constant vector (storage-compact is not yet)
- Add quote-less vector literal check
* Fixes
- Make behavior of internal definitions strictly conforming to R5RS
- Make C99-dependent stdint.h unneeded