WITH_META_MODE: Move the kernel support to kern.pre.mk.

This allows using META_MODE directly from the kernel build directory.
This also allows removing a hack from the DIRDEPS_BUILD kernel target.

Sponsored by:	EMC / Isilon Storage Division

Makefile.inc1

@@ -591,11 +591,6 @@ IMAKE_MTREE=	MTREE_CMD="mtree ${MTREEFLAGS}"
 # kernel stage
 KMAKEENV=	${WMAKEENV}
 KMAKE=		${KMAKEENV} ${MAKE} ${.MAKEFLAGS} ${KERNEL_FLAGS} KERNEL=${INSTKERNNAME}
-.if ${MK_META_MODE} == "yes"
-# meta mode normally is disallowed when building from curdir==objdir, but we
-# want to allow it for the kernel build.
-KMAKEENV+=	META_MODE="${.MAKE.MODE} curdirOk=yes"
-.endif
 
 #
 # buildworld

sys/conf/kern.pre.mk

@@ -19,6 +19,11 @@ _srcconf_included_:
 .include <bsd.compiler.mk>
 .include "kern.opts.mk"
 
+# The kernel build always occurs in the object directory which is .CURDIR.
+.if ${.MAKE.MODE:Unormal:Mmeta}
+.MAKE.MODE+=	curdirOk=yes
+.endif
+
 # Can be overridden by makeoptions or /etc/make.conf
 KERNEL_KO?=	kernel
 KERNEL?=	kernel

targets/pseudo/kernel/Makefile

@@ -15,10 +15,8 @@ ${KERNCONF}.config: .MAKE ${META_DEPS}
 	(cd ${KERN_CONFDIR} && \
 	${CONFIG} ${CONFIGARGS} -d ${KERN_OBJDIR} ${KERNCONF})
 
-# we need to pass curdirOk=yes to meta mode, since we want .meta files
-# in ${KERN_OBJDIR}
 ${KERNCONF}.build: .MAKE ${KERNCONF}.config
-	(cd ${KERN_OBJDIR} && META_MODE="${.MAKE.MODE} curdirOk=yes" ${.MAKE})
+	(cd ${KERN_OBJDIR} && ${.MAKE})
 
 .if ${.MAKE.LEVEL} > 0
 all: ${KERNCONF}.build