+changes relative to sbcl-1.9.38:
+ * bug fix: Backtrace from undefined function on x86 and x86-64 now show
+ the calling frame.
+ * bug fix: linkage-table entries on PPC now no longer overflow their
+ space allocation (potentially causing crashes if they are written out
+ of order).
+ * bug fix: Scrub control stack after scavenging in gencgc on non-x86oid
+ platforms, preventing the GC from seeing stale pointers on the control
+ stack in subsequent GCs (which would, and does, break invariants).
+ * bug fix: 32-bit unicode external formats now work on big-endian systems.
+ * bug fix: Literal characters with code points greater than about 32767
+ now work on PPC UNICODE builds.
+ * bug fix: Any noise left by SSE operations (sqrt and conversions) in the
+ high order bits are explicitly cleared out. In some contrived situations,
+ this could lead to wrong results in mixed real/complex float arithmetic.
+ * bug fix: Fix function/macro redefinition warnings when building with
+ clisp. (lp#576787, thanks to Josh Elsasser)
+
+changes in sbcl-1.0.38 relative to sbcl-1.0.37:
+ * incompatible change: Thread names are now restricted to SIMPLE-STRINGs
+ like for any other thread-related datastructure, MUTEX, etc. (lp#547095)
+ * deprecation: the SB-QUEUE contrib was merged into the SB-CONCURRENCY
+ contrib module. New code should depend on SB-CONCURRENCY, not SB-QUEUE.
+ * deprecation: SB-THEAD:GET-MUTEX was deprecated in favor of
+ SB-THREAD:GRAB-MUTEX.
+ * new contributed module: SB-CONCURRENCY is a new contrib; it's supposed to
+ contain additional data structures and tools for concurrent programming;
+ at the moment it contains a lock-free queue, and a lock-free mailbox
+ implementation.
+ * new feature: added SB-THREAD:GRAB-MUTEX; it's like the now deprecated
+ GET-MUTEX but takes &key rather than &optional parameters. Also added
+ :TIMEOUT argument to GRAB-MUTEX on non-sb-lutex platforms like Linux and
+ BSD.
+ * new feature: added SB-THREAD:TRY-SEMAPHORE, a non-blocking variant of
+ SB-THREAD:WAIT-ON-SEMAPHORE.
+ * new feature: SB-EXT:ATOMIC-DECF has been added as a companion to
+ SB-EXT:ATOMIC-INCF.
+ * new feature: a CANCEL-DEADLINE is associated with DEADLINE-TIMEOUT
+ conditions to defer the deadline for forever.