Please send Guile bug reports to bug-guile@gnu.org.
+Changes in 2.0.6 (since 2.0.5):
+
+* Notable changes
+
+** New optimization pass: common subexpression elimination (CSE)
+
+Guile's optimizer will now run a CSE pass after partial evaluation.
+This pass propagates static information about branches taken, bound
+lexicals, and effects from an expression's dominators. It can replace
+common subexpressions with their boolean values (potentially enabling
+dead code elimination), equivalent bound lexicals, or it can elide them
+entirely, depending on the context in which they are executed. This
+pass is especially useful in removing duplicate type checks, such as
+those produced by SRFi-9 record accessors.
+
+** Improvements to the partial evaluator
+
+Peval can now hoist tests that are common to both branches of a
+conditional into the test. This can help with long chains of
+conditionals, such as those generated by the `match' macro. Peval can
+now do simple beta-reductions of procedures with rest arguments. It
+also avoids residualizing degenerate lexical aliases, even when full
+inlining is not possible. Finally, peval now uses the effects analysis
+introduced for the CSE pass. More precise effects analysis allows peval
+to move more code.
+
+** Run finalizers asynchronously in asyncs
+
+Finalizers are now run asynchronously, via an async. See Asyncs in the
+manual. This allows Guile and user code to safely allocate memory while
+holding a mutex.
+
+** Update SRFI-14 character sets to Unicode 6.1
+
+Note that this update causes the Latin-1 characters `§' and `¶' to be
+reclassified as punctuation. They were previously considered to be part
+of `char-set:symbol'.
+
+** Better source information for datums
+
+When the `positions' reader option is on, as it is by default, Guile's
+reader will record source information for more kinds of datums.
+
+** Improved error and warning messages
+
+`syntax-violation' errors now prefer 'subform' for source info, with
+'form' as fallback. Syntactic errors in `cond' and `case' now produce
+better errors. `case' can now warn on duplicate datums, or datums that
+cannot be usefully compared with `eqv?'. `-Warity-mismatch' now handles
+applicable structs. `-Wformat' is more robust in the presence of
+`gettext'. Finally, various exceptions thrown by the Web modules now
+define appropriate exception printers.
+
+** A few important bug fixes in the HTTP modules.
+
+Guile's web server framework now checks if an application returns a body
+wheree it is not permitted, for example in response to a HEAD request,
+and warn or truncate the response as appropriate. Bad requests now
+cause a 400 Bad Request response to be printed before closing the port.
+Finally, some date-printing and URL-parsing bugs were fixed.
+
+** Pretty-print improvements
+
+When Guile needs to pretty-print Tree-IL, it will try to reconstruct
+`cond', `or`, and other derived syntax forms from the primitive tree-IL
+forms. It also uses the original names instead of the fresh unique
+names, when it is unambiguous to do so. This can be seen in the output
+of REPL commands like `,optimize'.
+
+Also, the `pretty-print' procedure has a new keyword argument,
+`#:max-expr-width'.
+
+** Fix memory leak involving applicable SMOBs
+
+At some point in the 1.9.x series, Guile began leaking any applicable
+SMOB that was actually applied. (There was a weak-key map from SMOB to
+trampoline functions, where the value had a strong reference on the
+key.) This has been fixed. There was much rejoicing!
+
+** Micro-optimizations
+
+A pile of micro-optimizations: the `string-trim' function when called
+with `char-set:whitespace'; the `(web http)' parsers; SMOB application;
+conversion of raw UTF-8 and UTF-32 data to and from SCM strings; vlists
+and vhashes; `read' when processing string literals.
+
+** Incompatible change to `scandir'
+
+As was the original intention, `scandir' now runs the `select?'
+procedure on all items, including subdirectories and the `.' and `..'
+entries. It receives the basename of the file in question instead of
+the full name. We apologize for this incompatible change to this
+function introduced in the 2.0.4 release.
+
+* Manual updates
+
+The manual has been made much more consistent in its naming conventions
+with regards to formal parameters of functions. Thanks to Bake Timmons.
+
+* New interfaces
+
+** New C function: `scm_to_pointer'
+** New C functions: `scm_new_smob', `scm_new_double_smob'
+** (ice-9 format): Add ~h specifier for localized number output.
+** (web response): New procedure: `response-must-not-include-body?'
+** New predicate: 'supports-source-properties?'
+** New C helpers: `scm_c_values', `scm_c_nvalues'
+** Newly public inline C function: `scm_unget_byte'
+** (language tree-il): New functions: `tree-il=?', `tree-il-hash'
+** New fluid: `%default-port-conversion-strategy'
+** New syntax: `=>' within `case'
+
+Search the manual for these identifiers, for more information.
+
+* New deprecations
+
+** `close-io-port' deprecated
+
+Use `close-port'.
+
+** `scm_sym2var' deprecated
+
+In most cases, replace with `scm_lookup' or `scm_module_variable'. Use
+`scm_define' or `scm_module_ensure_local_variable' if the second
+argument is nonzero. See "Accessing Modules from C" in the manual, for
+full details.
+
+** Lookup closures deprecated
+
+These were never documented. See "Module System Reflection" in the
+manual for replacements.
+
+* Build fixes
+
+** Fix compilation against uninstalled Guile on non-GNU platforms.
+** Fix `SCM_I_ERROR' definition for MinGW without networking.
+** Fix compilation with the Sun C compiler.
+** Fix check for `clock_gettime' on OpenBSD and some other systems.
+** Fix build with --enable-debug-malloc.
+** Honor $(program_transform_name) for the `guile-tools' symlink.
+** Fix cross-compilation of GOOPS-using code.
+
+* Bug fixes
+
+** Fix use of unitialized stat buffer in search-path of absolute paths.
+** Avoid calling `freelocale' with a NULL argument.
+** Work around erroneous tr_TR locale in Darwin 8 in tests.
+** Fix `getaddrinfo' test for Darwin 8.
+** Use Gnulib's `regex' module for better regex portability.
+** `source-properties' and friends work on any object
+** Rewrite open-process in C, for robustness related to threads and fork
+** Fix <TAG>vector-length when applied to other uniform vector types
+** Fix escape-only prompt optimization (was disabled previously)
+** Fix a segfault when /dev/urandom is not accessible
+** Fix flush on soft ports, so that it actually runs.
+** Better compatibility of SRFI-9 records with core records
+** Fix and clarify documentation of `sorted?'.
+** Fix IEEE-754 endianness conversion in bytevectors.
+** Correct thunk check in the `wind' instruction.
+** Add @acronym support to texinfo modules
+** Fix docbook->texi for <ulink> without URL
+** Fix `setvbuf' to leave the line/column number unchanged.
+** Add missing public declaration for `scm_take_from_input_buffers'.
+** Fix relative file name canonicalization with empty %LOAD-PATH entries.
+** Import newer (ice-9 match) from Chibi-Scheme.
+** Fix unbound variables and unbound values in ECMAScript runtime.
+** Make SRFI-6 string ports Unicode-capable.
+
+\f
+Changes in 2.0.5 (since 2.0.4):
+
+This release fixes the binary interface information (SONAME) of
+libguile, which was incorrect in 2.0.4. It does not contain other
+changes.
+
+\f
+Changes in 2.0.4 (since 2.0.3):
+
+* Notable changes
+
+** Better debuggability for interpreted procedures.
+
+Guile 2.0 came with a great debugging experience for compiled
+procedures, but the story for interpreted procedures was terrible. Now,
+at least, interpreted procedures have names, and the `arity' procedure
+property is always correct (or, as correct as it can be, in the presence
+of `case-lambda').
+
+** Support for cross-compilation.
+
+One can now use a native Guile to cross-compile `.go' files for a
+different architecture. See the documentation for `--target' in the
+"Compilation" section of the manual, for information on how to use the
+cross-compiler. See the "Cross building Guile" section of the README,
+for more on how to cross-compile Guile itself.
+
+** The return of `local-eval'.
+
+Back by popular demand, `the-environment' and `local-eval' allow the
+user to capture a lexical environment, and then evaluate arbitrary
+expressions in that context. There is also a new `local-compile'
+command. See "Local Evaluation" in the manual, for more. Special
+thanks to Mark Weaver for an initial implementation of this feature.
+
+** Fluids can now have default values.
+
+Fluids are used for dynamic and thread-local binding. They have always
+inherited their values from the context or thread that created them.
+However, there was a case in which a new thread would enter Guile, and
+the default values of all the fluids would be `#f' for that thread.
+
+This has now been fixed so that `make-fluid' has an optional default
+value for fluids in unrelated dynamic roots, which defaults to `#f'.
+
+** Garbage collector tuning.
+
+The garbage collector has now been tuned to run more often under some
+circumstances.
+
+*** Unmanaged allocation
+
+The new `scm_gc_register_allocation' function will notify the collector
+of unmanaged allocation. This will cause the collector to run sooner.
+Guile's `scm_malloc', `scm_calloc', and `scm_realloc' unmanaged
+allocators eventually call this function. This leads to better
+performance under steady-state unmanaged allocation.
+
+*** Transient allocation
+
+When the collector runs, it will try to record the total memory
+footprint of a process, if the platform supports this information. If
+the memory footprint is growing, the collector will run more frequently.
+This reduces the increase of the resident size of a process in response
+to a transient increase in allocation.
+
+*** Management of threads, bignums
+
+Creating a thread will allocate a fair amount of memory. Guile now does
+some GC work (using `GC_collect_a_little') when allocating a thread.
+This leads to a better memory footprint when creating many short-lived
+threads.
+
+Similarly, bignums can occupy a lot of memory. Guile now offers hooks
+to enable custom GMP allocators that end up calling
+`scm_gc_register_allocation'. These allocators are enabled by default
+when running Guile from the command-line. To enable them in libraries,
+set the `scm_install_gmp_memory_functions' variable to a nonzero value
+before loading Guile.
+
+** SRFI-39 parameters are available by default.
+
+Guile now includes support for parameters, as defined by SRFI-39, in the
+default environment. See "Parameters" in the manual, for more
+information. `current-input-port', `current-output-port', and
+`current-error-port' are now parameters.
+
+** Add `current-warning-port'.
+
+Guile now outputs warnings on a separate port, `current-warning-port',
+initialized to the value that `current-error-port' has on startup.
+
+** Syntax parameters.
+
+Following Racket's lead, Guile now supports syntax parameters. See
+"Syntax parameters" in the manual, for more.
+
+Also see Barzilay, Culpepper, and Flatt's 2011 SFP workshop paper,
+"Keeping it Clean with syntax-parameterize".
+
+** Parse command-line arguments from the locale encoding.
+
+Guile now attempts to parse command-line arguments using the user's
+locale. However for backwards compatibility with other 2.0.x releases,
+it does so without actually calling `setlocale'. Please report any bugs
+in this facility to bug-guile@gnu.org.
+
+** One-armed conditionals: `when' and `unless'
+
+Guile finally has `when' and `unless' in the default environment. Use
+them whenever you would use an `if' with only one branch. See
+"Conditionals" in the manual, for more.
+
+** `current-filename', `add-to-load-path'
+
+There is a new form, `(current-filename)', which expands out to the
+source file in which it occurs. Combined with the new
+`add-to-load-path', this allows simple scripts to easily add nearby
+directories to the load path. See "Load Paths" in the manual, for more.
+
+** `random-state-from-platform'
+
+This procedure initializes a random seed using good random sources
+available on your platform, such as /dev/urandom. See "Random Number
+Generation" in the manual, for more.
+
+** Warn about unsupported `simple-format' options.
+
+The `-Wformat' compilation option now reports unsupported format options
+passed to `simple-format'.
+
+** Manual updates
+
+Besides the sections already mentioned, the following manual sections
+are new in this release: "Modules and the File System", "Module System
+Reflection", "Syntax Transformer Helpers", and "Local Inclusion".
+
+* New interfaces
+
+** (ice-9 session): `apropos-hook'
+** New print option: `escape-newlines', defaults to #t.
+** (ice-9 ftw): `file-system-fold', `file-system-tree', `scandir'
+** `scm_c_value_ref': access to multiple returned values from C
+** scm_call (a varargs version), scm_call_7, scm_call_8, scm_call_9
+** Some new syntax helpers in (system syntax)
+
+Search the manual for these identifiers and modules, for more.
+
+* Build fixes
+
+** FreeBSD build fixes.
+** OpenBSD compilation fixes.
+** Solaris 2.10 test suite fixes.
+** IA64 compilation fix.
+** MinGW build fixes.
+** Work around instruction reordering on SPARC and HPPA in the VM.
+** Gnulib updates: added `dirfd', `setenv' modules.
+
+* Bug fixes
+
+** Add a deprecated alias for $expt.
+** Add an exception printer for `getaddrinfo-error'.
+** Add deprecated shim for `scm_display_error' with stack as first argument.
+** Add warnings for unsupported `simple-format' options.
+** Allow overlapping regions to be passed to `bytevector-copy!'.
+** Better function prologue disassembly
+** Compiler: fix miscompilation of (values foo ...) in some contexts.
+** Compiler: fix serialization of #nil-terminated lists.
+** Compiler: allow values bound in non-tail let expressions to be collected.
+** Deprecate SCM_ASRTGO.
+** Document invalidity of (begin) as expression; add back-compat shim.
+** Don't leak file descriptors when mmaping objcode.
+** Empty substrings no longer reference the original stringbuf.
+** FFI: Fix `set-pointer-finalizer!' to leave the type cell unchanged.
+** FFI: Hold a weak reference to the CIF made by `procedure->pointer'.
+** FFI: Hold a weak reference to the procedure passed to `procedure->pointer'.
+** FFI: Properly unpack small integer return values in closure call.
+** Fix R6RS `fold-left' so the accumulator is the first argument.
+** Fix bit-set*! bug from 2005.
+** Fix bug in `make-repl' when `lang' is actually a <language>.
+** Fix bugs related to mutation, the null string, and shared substrings.
+** Fix <dynwind> serialization.
+** Fix erroneous check in `set-procedure-properties!'.
+** Fix generalized-vector-{ref,set!} for slices.
+** Fix error messages involving definition forms.
+** Fix primitive-eval to return #<unspecified> for definitions.
+** HTTP: Extend handling of "Cache-Control" header.
+** HTTP: Fix qstring writing of cache-extension values
+** HTTP: Fix validators for various list-style headers.
+** HTTP: Permit non-date values for Expires header.
+** HTTP: `write-request-line' writes absolute paths, not absolute URIs.
+** Hack the port-column of current-output-port after printing a prompt.
+** Make sure `regexp-quote' tests use Unicode-capable string ports.
+** Peval: Fix bugs in the new optimizer.
+** Statistically unique marks and labels, for robust hygiene across sessions.
+** Web: Allow URIs with empty authorities, like "file:///etc/hosts".
+** `,language' at REPL sets the current-language fluid.
+** `primitive-load' returns the value(s) of the last expression.
+** `scm_from_stringn' always returns unique strings.
+** `scm_i_substring_copy' tries to narrow the substring.
+** i18n: Fix gc_malloc/free mismatch on non-GNU systems.
+
+\f
Changes in 2.0.3 (since 2.0.2):
* Speed improvements
HCoop / bpt / guile.git / blobdiff