Steel Bank Common Lisp

SBCL 1.0.54 has been released with the following changes:

changes in sbcl-1.0.54 relative to sbcl-1.0.53:
  * minor incompatible changes:
    ** RENAME-FILE on a symbolic links used to rename the linked-to file
       instead of the link.
    ** DELETE-DIRECTORY on symbolic link to a directory used to delete the
       directory, but now signal an error instead. Use TRUENAME to resolve the
       pathname if you wish to delete the linked directory, and DELETE-FILE if
       you wish to delete the
    ** The internal SB-THREAD::SPINLOCK API has been deprecated, and using
       symbols associated with it will trigger a compile-time warning.
  * thread-related enhancements:
    (This work has been funded by the SBCL Threading 2011 IndieGoGo campaign.
     Many thanks to generous donors!)
    ** Threading is now more reliable on non-Linux platforms. We still don't
       consider threads on non-Linux platforms good enough to enable them by
       default, but they're in a clearly better shape now.
    ** Deadlines supported now on all platforms.
    ** All blocking functions in the threading API now have a :TIMEOUT
       argument.
    ** Semaphore notification objects have been added to SB-THREAD.
    ** SB-CONCURRENCY contrib now includes Allegro-style GATE objects.
    ** SB-EXT:COMPARE-AND-SWAP has been extended to support SLOT-VALUE,
       STANDARD-INSTANCE-ACCESS, and FUNCALLABLE-STANDARD-INSTANCE-ACCESS.
    ** Users can now defined new places usable with SB-EXT:COMPARE-AND-SWAP
       using an API anologous to defining new SETFable places.
  * GC-related enhancements and bug fixes:
    ** --dynamic-space-size and --control-stack-size now understand Kb, Mb,
         and Gb suffixes. Default is megabytes as before.
    ** on GENCGC targets, the default dynamic space size is now 512Mb for
       32-bit systems, and 1Gb for 64-bit systems. (OpenBSD/x86-64 is the only
       exception, defaulting to mere 444Mb to fit under default ulimits.) The
       new defaults are in place to prevent hitting swap on low-end systems.
       Use build-time option --dynamic-space-size to build an SBCL with
       another default, or the runtime option to adjust the size at startup: a
       good size is at most equal to the amount of physical memory the system
       has.
    ** on GENCGC targets, nursery and generation sizes now default to 5% of
       dynamic-space size.
    ** on GENCGC targets, SB-KERNEL:MAKE-LISP-OBJ no longer categorically
       refuses to create SIMPLE-FUN objects.
    ** on 64-bit GENCGC targets, setting the nursery size above 4Gb now works.
       (lp#870868)
    ** on CHENEYGC targets, SB-KERNEL:MAKE-LISP-OBJ now does the same
       validation of pointer objects as GENCGC does, instead of a
       comparatively weak bounds-check against the heap spaces.
  * SB-BSD-SOCKETS bug fixes:
    ** GET-PROTOCOL-BY-NAME had a significant memory leak.
    ** GET-HOST-BY-NAME and GET-HOST-BY-ADDRESS small amounts of memory on
       systems with getaddrinfo().
    ** GET-HOST-BY-NAME and GET-HOST-BY-ADDRESS weren't thread or interrupt
       safe outside systems with getaddrinfo().
  * enhancement: ASDF has been updated 2.019.
  * enhancement: special-case TCO prevention for functions which never return
    extended to untrusted types, keeping one more frame's worth of debug
    information around in many cases.
  * enhancement: debug-names of anonymous and local function are more
    descriptive. Affects backtraces and SB-SPROF results. (lp#805100)
  * enhancement: on win32, ABS of complex floats guards better against
    overflows. (lp#888410)
  * enhancement: RUN-PROGRAM now distinguishes exec() failing from child
    process exiting with code 1. (lp#676987)
  * enhancement: convenience function SET-SBCL-SOURCE-LOCATION for informing
    the system where on the filesystem the SBCL sources themselves are
    located.  (Thanks to Zach Beane)
  * enhancement: the compiler is now able to derive tighter bounds for
    floating point numbers in some cases. (Thanks to Lutz Euler, lp#894498)
  * bug fix: on 64-bit targets, atomic-incf/aref does index computation
    correctly, even on wide-fixnum builds. (lp#887220)
  * bug fix: (DIRECTORY "foo/*/*.*") did not follow symlinks in foo/ that
    resolved to directories.
  * bug fix: type mismatch when assigning to lexical variables no longer
    result in fasl-dumping internal type objects. (lp#890750)
  * bug fix: type mismatch on (SETF AREF) and function return values no
    longer result in fasl-dumping internal type objects.
  * bug fix: With several combinations of argument types, for example (EXPT
    <integer> <(complex double)>), EXPT now uses double-precision throughout
    instead of partially calculating only to single-precision.  (lp#741564;
    thanks to Lutz Euler)
  * bug fix: SYMBOL-VALUE-IN-THREAD is no longer able to construct bogus
    objects when interrupted by GC on PPC.

--
Juho Snellman