This is xnu-11215.1.10. See this file in:
export MakeInc_cmd=${SRCROOT}/makedefs/MakeInc.cmd
export MakeInc_def=${SRCROOT}/makedefs/MakeInc.def
export MakeInc_rule=${SRCROOT}/makedefs/MakeInc.rule
export MakeInc_dir=${SRCROOT}/makedefs/MakeInc.dir
include $(MakeInc_cmd)
include $(MakeInc_def)
SETUP_SUBDIRS = \
config \
kextsymboltool \
setsegname \
decomment \
installfile \
replacecontents
include $(MakeInc_rule)
include $(MakeInc_dir)