sys-kernel/linux-headers-2.6.20-r2 lacks asm/page.h which is needed for example, for building dev-lisp/clisp (I've realized of this bug when building Sage [http://modular.math.washington.edu/sage/] under Gentoo, which includes clisp) this header is included for example in sys-kernel/2.6.17-r2 and with these headers, things worked. Reproducible: Always
Not a bug; file bugs against packages that require this file to build instead. Thanks.