The sys.df file, defines the INCLUDES and DEFINES variables.
INCLUDES=" \ -Isys/include \ -Ibsd \ -Ibsd/sys \ -I${OS_DIR}/include/sys \ -Ibsd/machine \ -I${OS_DIR}/include/machine \ -I${OS_DIR}/include/chorus/iom \ -I${OS_DIR}/include/chorus \ -I${OS_DIR}/include/chorus/cx \ -I${NUCLEUS_DIR}/include/chorus \ -I${IOM_DIR}/include \ -I${OS_DIR}/include \ -I${NUCLEUS_DIR}/include \ -I${OS_DIR}/include/stdc \ -I${NUCLEUS_DIR}/include/stdc" DEFINES="$DEFINES -DKERNEL -D_KERNEL -D__FreeBSD__ / -DINET -DNO_CACHE -DMSDOSFS -DNFS -DIOM_MALLOC -DSHARED_FD"