He showed how to convince the GNU toolchain to build SBCL in a way
which supports callbacks from C code into SBCL.
+Nikodemus Siivola:
+ He provided build fixes, in particular to tame the SunOS toolchain,
+ and has fixed many (stream-related and other) bugs besides.
+
Brian Spilsbury:
He wrote Unicode-capable versions of SBCL's character, string, and
stream types and operations on them.