It'd be nice to fix this:
bix:/usr/src/25> make fs/xfs/linux-2.6/xfs_iops.o
SPLIT include/linux/autoconf.h -> include/config/*
SHIPPED scripts/genksyms/lex.c
SHIPPED scripts/genksyms/parse.h
SHIPPED scripts/genksyms/keywords.c
HOSTCC scripts/genksyms/lex.o
SHIPPED scripts/genksyms/parse.c
HOSTCC scripts/genksyms/parse.o
HOSTLD scripts/genksyms/genksyms
HOSTCC scripts/mod/file2alias.o
HOSTCC scripts/mod/modpost.o
HOSTLD scripts/mod/modpost
scripts/Makefile.build:15: /usr/src/devel/fs/xfs/linux-2.6/Makefile: No such file or directory
make[1]: *** No rule to make target `/usr/src/devel/fs/xfs/linux-2.6/Makefile'. Stop.
make: *** [fs/xfs/linux-2.6/xfs_iops.o] Error 2