Clg won't compile with SBCL of a version >= 126.96.36.199. This is because
SB-KERNEL:TYPE-EXPAND was replaced by SB-EXT:TYPEXPAND in SBCL 188.8.131.52.
Adding the following:
#?+(pkg-config:sbcl>= 1 0 35 15)
(defun type-expand (form)
somewhere around the type expansion code in clg/gffi/interface.lisp will
get around this problem. SB-EXT:WITHOUT-PACKAGE-LOCKS is needed because
TYPE-EXPAND is still exported from the SB-KERNEL package for no reason.