NetBSD/share/mk/bsd.kernobj.mk

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# $NetBSD: bsd.kernobj.mk,v 1.7 2001/11/27 05:39:03 jmc Exp $
# KERNSRCDIR Is the location of the top of the kernel src.
# It defaults to ${BSDSRCDIR}/sys, but the top-level
# Makefile.inc sets it to ${ABSTOP}/sys (ABSTOP is the
# absolute path to the directory where the top-level
# Makefile.inc was found.
#
# KERNARCHDIR Is the location of the machine dependent kernel
# sources. It defaults to arch/${MACHINE}
#
# KERNCONFDIR Is where the configuration files for kernels are
# found; default is ${KERNSRCDIR}/${KERNARCHDIR}/conf.
#
# KERNOBJDIR Is the kernel build directory. The kernel GENERIC for
# instance will be compiled in ${KERNOBJDIR}/GENERIC.
# The default value is
# ${KERNSRCDIR}/${KERNARCHDIR}/compile
#
# If MAKEOBJDIRPREFIX or _SRC_TOP_OBJ is set than the value will
# be either
#
# ${MAKEOBJDIRPREFIX}${KERNSRCDIR}/${KERNARCHDIR}/compile
#
# or
#
# ${_SRC_TOP_OBJ_}/sys/${KERNARCHDIR}/compile
#
# with MAKEOBJDIRPREFIX taking priority over _SRC_TOP_OBJ_
#
.include <bsd.own.mk>
KERNSRCDIR?= ${BSDSRCDIR}/sys
# just incase ${MACHINE} is not always correct
KERNARCHDIR?= arch/${MACHINE}
#
# XXX It's ugly but it does what we need here. If making objects use the above
# rules for trying to figure out a KERNOBJDIR.
#
# When coming back through here in rules (such as building kernels for
# a release), check which vars we're using and which directory base has been
# made in the previous obj stage to figure out which one to expose.
#
# All cases will fall through to the ${KERNSRCDIR}/${KERNARCHDIR}/compile case
# if nothing ends up setting this.
.if make(obj) || \
(defined(MAKEOBJDIRPREFIX) && exists(${MAKEOBJDIRPREFIX}${KERNSRCDIR}/${KERNARCHDIR}/compile)) || \
(defined(_SRC_TOP_OBJ_) && exists(${_SRC_TOP_OBJ_}/sys/${KERNARCHDIR}/compile))
.if defined (MAKEOBJDIRPREFIX)
KERNOBJDIR?= ${MAKEOBJDIRPREFIX}${KERNSRCDIR}/${KERNARCHDIR}/compile
.else
.if defined(_SRC_TOP_OBJ_) && ${_SRC_TOP_OBJ_} != ""
KERNOBJDIR?= ${_SRC_TOP_OBJ_}/sys/${KERNARCHDIR}/compile
.endif
.endif
.endif
KERNOBJDIR?= ${KERNSRCDIR}/${KERNARCHDIR}/compile
KERNCONFDIR?= ${KERNSRCDIR}/${KERNARCHDIR}/conf