changes in sbcl-2.2.9 relative to sbcl-2.2.8:
* platform support:
** fix build on Darwin platforms with -fno-common. (lp#1980570, thanks to
Sergei Trofimovich)
** include /usr/local paths when building on FreeBSD. (lp#1981112,
reported by William G Lederer)
** several micro-optimizations on x86-64, including: better use of
INC/SUB, better SAP+, shorter KEYWORDP, better argument count
verification
** arm64: better KEYWORDP, better argument count verification
** fix build on 32-bit Windows. (lp#1988534, thanks to Alexis Rivera)
** x86-64: WITH-PINNED-OBJECTS can pin constants. (lp#1989037)
* bug fix: make sb-simd build in compiler-only SBCL. (thanks to Tonas
Hlavaty)
* bug fix: SB-SPROF:WITH-PROFILING now returns the value of its body (as was
advertised in its documentation).
* bug fix: catch malformed LET* forms in DEFMETHOD bodies. (lp#1988880,
reported by Patrick Poitras)
* enhancement: better source form tracking for atoms in LET bindings.
* optimization: reader character macro lookup is simpler and faster.
* optimization: FILL-POINTER (and its setter) are more compact.