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update NEWS for 1.9.4
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Andy Wingo
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1 changed files with 72 additions and 91 deletions
163
NEWS
163
NEWS
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@ -8,109 +8,63 @@ Please send Guile bug reports to bug-guile@gnu.org.
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(During the 1.9 series, we will keep an incremental NEWS for the latest
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prerelease, and a full NEWS corresponding to 1.8 -> 2.0.)
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Changes in 1.9.3 (since the 1.9.2 prerelease):
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Changes in 1.9.4 (since the 1.9.3 prerelease):
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** Guile now adds its install prefix to the LTDL_LIBRARY_PATH
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** Guile now uses libgc, the Boehm-Demers-Weiser garbage collector
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Users may now install Guile to nonstandard prefixes and just run
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`/path/to/bin/guile', instead of also having to set LTDL_LIBRARY_PATH to
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include `/path/to/lib'.
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The semantics of `scm_gc_malloc ()' have been changed, in a
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backward-compatible way. A new allocation routine,
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`scm_gc_malloc_pointerless ()', was added.
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** Dynamically loadable extensions may be placed in a Guile-specific path
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Libgc is a conservative GC, which we hope will make interaction with C
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code easier and less error-prone.
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Before, Guile only searched the system library paths for extensions
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(e.g. /usr/lib), which meant that the names of Guile extensions had to
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be globally unique. Installing them to a Guile-specific extensions
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directory is cleaner. Use `pkg-config --variable=extensionsdir
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guile-2.0' to get the location of the extensions directory.
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** Files loaded with `load' will now be compiled automatically.
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** The programmatic `compile' procedure compiles its expression in a
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fresh module, by default
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As with files loaded via `primitive-load-path', `load' will also compile
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its target if autocompilation is enabled, and a fresh compiled file is
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not found.
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This should make the results of `compile' more predictable. Users may
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specify a specific module in which to compile via the `#:env' keyword
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argument to `compile' (and `compile-file').
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There are two points of difference to note, however. First, `load' does
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not search `GUILE_LOAD_COMPILED_PATH' for the file; it only looks in the
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autocompilation directory, normally a subdirectory of ~/.cache/guile.
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** `compile-file' preserves expansion-time side-effects to `current-reader'
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Secondly, autocompilation also applies to files loaded via the -l
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command-line argument -- so the user may experience a slight slowdown
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the first time they run a Guile script, as the script is autocompiled.
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User modules may now modify the `current-reader' fluid at expansion
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time, usually within an eval-when, and those modifications will remain
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in place when compiling subsequent forms in the file.
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** Support for non-ASCII source code files
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See "The Scheme Compiler" in the Guile manual for more details.
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The default reader now handles source code files for some of the
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non-ASCII character encodings, such as UTF-8. A non-ASCII source file
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should have an encoding declaration near the top of the file. Also,
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there is a new function, `file-encoding', that scans a port for a coding
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declaration. See the section of the manual entitled, "Character Encoding
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of Source Files".
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** Guile's Emacs integration is now more keyboard-friendly
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The pre-1.9.3 reader handled 8-bit clean but otherwise unspecified source
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code. This use is now discouraged.
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Backtraces may now be disclosed with the keyboard in addition to the
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mouse.
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** Support for locale transcoding when reading from and writing to ports
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** Compile-time warnings: -Wunbound-variable
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Ports now have an associated character encoding, and port read and write
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operations do conversion to and from locales automatically. Ports also
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have an associated strategy for how to deal with locale conversion
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failures.
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Guile can warn about potentially unbound free variables. Pass the
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-Wunbound-variable on the `guile-tools compile' command line, or add
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`#:warnings '(unbound-variable)' to your `compile' or `compile-file'
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invocation.
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See the documentation in the manual for the four new support functions,
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`set-port-encoding!', `port-encoding', `set-port-conversion-strategy!',
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and `port-conversion-strategy'.
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** Wide character/string support in locale-specific character/string
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functions
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** String and SRFI-13 functions can operate on Unicode strings
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The `(ice-9 i18n)' functions (`string-locale<?', etc.) now work
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correctly on wide strings as well. This should finish off the remaining
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Unicode support patches. Please send any Unicode bug reports to
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`bug-guile@gnu.org'.
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** Unicode support for SRFI-14 character sets
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** ABI harmonization
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The default character sets are no longer locale dependent and contain
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characters from the whole Unicode range. There is a new predefined
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character set, `char-set:designated', which contains all assigned
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Unicode characters. There is a new debugging function, `%char-set-dump'.
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** Character functions operate on Unicode characters
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`char-upcase' and `char-downcase' use default Unicode casing rules.
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Character comparisons such as `char<?' and `char-ci<?' now sort based on
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Unicode code points.
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** Unicode symbol support
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One may now use U+03BB (GREEK SMALL LETTER LAMBDA) as an identifier.
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** New readline history functions
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The (ice-9 readline) module now provides add-history, read-history,
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write-history and clear-history, which wrap the corresponding GNU
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History library functions.
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** Removed deprecated uniform array procedures:
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dimensions->uniform-array, list->uniform-array, array-prototype
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Instead, use make-typed-array, list->typed-array, or array-type,
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respectively.
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** Removed deprecated uniform array procedures: scm_make_uve,
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scm_array_prototype, scm_list_to_uniform_array,
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scm_dimensions_to_uniform_array, scm_make_ra, scm_shap2ra, scm_cvref,
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scm_ra_set_contp, scm_aind, scm_raprin1
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These functions have been deprecated since early 2005.
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** scm_array_p has one argument, not two
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Use of the second argument produced a deprecation warning, so it is
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unlikely that any code out there actually used this functionality.
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** GOOPS documentation folded into Guile reference manual
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GOOPS, Guile's object system, used to be documented in separate manuals.
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This content is now included in Guile's manual directly.
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** `libguile-i18n' has been merged into `libguile'
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The C support code for `(ice-9 i18n)', which used to be in
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`libguile-i18n', is now part of `libguile'.
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** Last but not least, the `λ' macro can be used in lieu of `lambda'
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`scm_primitive_load_path' now has the signature it did in 1.8.
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`scm_array_p' does as well, reverting an incompatible change made in
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1.9.3. Finally, Guile now has the same ABI when built with or without
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threads, something that should make Debian users happy.
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** And of course, the usual collection of bugfixes
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@ -160,6 +114,17 @@ documented in the manual. This will be fixed before 2.0.
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Pass the `--help' command-line option to these commands for more
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information.
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** Guile now adds its install prefix to the LTDL_LIBRARY_PATH
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Users may now install Guile to nonstandard prefixes and just run
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`/path/to/bin/guile', instead of also having to set LTDL_LIBRARY_PATH to
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include `/path/to/lib'.
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** Guile's Emacs integration is now more keyboard-friendly
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Backtraces may now be disclosed with the keyboard in addition to the
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mouse.
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* Changes to Scheme functions and syntax
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** Procedure removed: `the-environment'
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@ -651,6 +616,13 @@ There was an EBCDIC compile flag that altered some of the character
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processing. It appeared that full EBCDIC support was never completed
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and was unmaintained.
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** Compile-time warnings: -Wunbound-variable
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Guile can warn about potentially unbound free variables. Pass the
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-Wunbound-variable on the `guile-tools compile' command line, or add
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`#:warnings '(unbound-variable)' to your `compile' or `compile-file'
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invocation.
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** New macro type: syncase-macro
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XXX Need to decide whether to document this for 2.0, probably should:
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@ -701,6 +673,12 @@ the variable. This was an error, and was fixed.
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As syntax-case is available by default, importing `(ice-9 syncase)' has
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no effect, and will trigger a deprecation warning.
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** New readline history functions
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The (ice-9 readline) module now provides add-history, read-history,
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write-history and clear-history, which wrap the corresponding GNU
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History library functions.
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** Removed deprecated uniform array procedures:
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dimensions->uniform-array, list->uniform-array, array-prototype
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@ -753,11 +731,6 @@ definition depends on the application's value for `_FILE_OFFSET_BITS'.
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These functions have been deprecated since early 2005.
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** scm_array_p has one argument, not two
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Use of the second argument produced a deprecation warning, so it is
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unlikely that any code out there actually used this functionality.
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* Changes to the distribution
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** Guile's license is now LGPLv3+
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@ -788,6 +761,14 @@ macros should now require `guile-2.0' instead of `guile-1.8'.
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If $(libdir) is /usr/lib, for example, Guile will install its .go files
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to /usr/lib/guile/1.9/ccache. These files are architecture-specific.
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** Dynamically loadable extensions may be placed in a Guile-specific path
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Before, Guile only searched the system library paths for extensions
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(e.g. /usr/lib), which meant that the names of Guile extensions had to
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be globally unique. Installing them to a Guile-specific extensions
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directory is cleaner. Use `pkg-config --variable=extensionsdir
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guile-2.0' to get the location of the extensions directory.
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** New dependency: libgc
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See http://www.hpl.hp.com/personal/Hans_Boehm/gc/, for more information.
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