[Sbcl-announce] sbcl-2.0.0 released

[Christophe R. <cs...@ca...>]

Dear all,

I have just released sbcl-2.0.0 and uploaded source and a binary to
SourceForge.

Why 2.0.0?  There is no substantial or major breaking change to justify
the leading version number increment: the main reason is to mark 20
years of SBCL's existence, following William Harold Newman's initial
announcement to cmucl-imp in 1999 <http://www.sbcl.org/sbcl10/sbcl-0.0>.
As with past releases, I expect to continue the current habit of
releasing the trunk on an approximately-monthly basis, attempting to
minimize regressions but otherwise not making any particular guarantees
about pace or direction of development.  (Obviously I hope we continue
to make things better!).

One minor incompatible change in this release (included in the list of
changes below) is the removal of the :RELOCATABLE-HEAP symbol from
*FEATURES* -- we believe it was unlikely that user code should ever have
dispatched on this symbol, though it was used in conditionally compiling
parts of SBCL itself.  We intend in the next few months to examine and
probably remove other build-time features from the *FEATURES* in the
final image.

Finally, I wish you all a happy New Year and another couple of
productive and enjoyable decades of SBCL development and deployment.

Best wishes,

Christophe

changes in sbcl-2.0.0 relative to sbcl-1.5.9:
  * minor incompatible change: heap relocation now works on Windows.  Since
    this feature now works on all platforms, it is enabled unconditionally and
    the :RELOCATABLE-HEAP symbol no longer appears on *FEATURES* in any
    builds.  (Thanks to Luís Borges de Oliveira)
  * enhancement: malformed type specifiers and occurrences of deprecated types
    in :TYPE initargs of DEFCLASS and DEFINE-CONDITION slot specifications
    are detected and result in compile-time errors and warnings respectively.
  * enhancement: parallel contrib building, controlled by SBCL_MAKE_JOBS=-jX
    the same as for the C runtime.
  * bug fix: add a walker template for WITH-SOURCE-FORM.
  * bug fix: start the summary of a compilation unit on a fresh line.  (Thanks
    to Zach Beane)
  * bug fix: on Windows, PARSE-NATIVE-NAMESTRING produces an absolute
    directory when parsing a bare drive name and :AS-DIRECTORY is specified.
    (Thanks to Luís Borges de Oliveira)
  * bug fix: on RISCV, the runtime is linked with libz if the core compression
    feature is requested.  (Thanks to Andreas Schwab)
  * bug fix: ADJOIN using an EQL test and a KEY function only transforms into
    an EQ test if the key function returns values for which EQ and EQL are
    guaranteed to be the same.
  * optimizations:
    ** the instruction sequence for multiple-value calls is more
       efficient on x86-64.
    ** the direction flag is now unused on x86 and x86-64 when handling
       an unknown number of return values.  (Thanks to Fanael Linithien)
    ** the x86-64 backend is better able to use memory operands for arithmetic
       operations.
    ** compilation of TYPECASE to a jump table is enabled when all the types
       being tested are frozen.
    ** compilation of CASE and ECASE into a jump table has been implemented on
       32- and 64-bit powerpc platforms.
    ** the implementation of Unicode normalization has been sped up.
    ** pretty-printing dispatch on conses is faster, particularly with the
       standard pretty-print dispatch table.  Deeply-nested forms should also
       pretty-print faster.