He showed how to convince the GNU toolchain to build SBCL in a way
which supports callbacks from C code into SBCL.
+Rudi Schlatte:
+ He ported Paul Foley's simple-streams implementation from cmucl,
+ converted the sbcl manual to Texinfo and wrote a documentation
+ string extractor that keeps function documentation in the manual
+ current.
+
Nikodemus Siivola:
He provided build fixes, in particular to tame the SunOS toolchain,
and has fixed many (stream-related and other) bugs besides.