Create a seperate ZFS enabled loader.

This adds zfsloader which will be called by zfsboot/gptzfsboot code rather
than the tradional loader.  This eliminates the need to set the
LOADER_ZFS_SUPPORT variable in order to get a ZFS enabled loader.

Note however, that you must reinstall your bootcode (zfsboot/gptzfsboot)
in order for the boot process to use the new loader.

New installations will no longer be required to build a ZFS enabled
loader for a working ZFS boot system.  Installing zfsboot/gptzfsboot is
sufficient for acknowledging the use of CDDL code and therefore the ZFS
enabled loader.

Based on a previous patch from jhb@

Reviewed by:	jhb@
MFC after:	2 weeks

1 files changed, 18 insertions, 12 deletions

diff --git a/sys/boot/i386/loader/Makefile b/sys/boot/i386/loader/Makefile
index 8f3480a..719e28d 100644
--- a/sys/boot/i386/loader/Makefile
+++ b/sys/boot/i386/loader/Makefile
@@ -3,9 +3,10 @@
 .include <bsd.own.mk>
 MK_SSP=		no
 
-PROG=		loader.sym
+LOADER?=	loader
+PROG=		${LOADER}.sym
 INTERNALPROG=
-NEWVERSWHAT=	"bootstrap loader" i386
+NEWVERSWHAT?=	"bootstrap loader" i386
 
 # architecture-specific loader code
 SRCS=		main.c conf.c vers.c
@@ -16,7 +17,7 @@ CFLAGS+=	-DLOADER_FIREWIRE_SUPPORT
 LIBFIREWIRE=	${.OBJDIR}/../libfirewire/libfirewire.a
 .endif
 
-# Put LOADER_ZFS_SUPPORT=yes in /etc/make.conf for ZFS support
+# Set by zfsloader Makefile
 .if defined(LOADER_ZFS_SUPPORT)
 CFLAGS+=	-DLOADER_ZFS_SUPPORT
 LIBZFS=		${.OBJDIR}/../../zfs/libzfsboot.a
@@ -61,7 +62,7 @@ CFLAGS+=	-DLOADER_GPT_SUPPORT
 CFLAGS+=	-I${.CURDIR}/../../common
 CFLAGS+=	-I.
 
-CLEANFILES=	vers.c loader loader.bin loader.help
+CLEANFILES=	vers.c ${LOADER} ${LOADER}.bin loader.help
 
 CFLAGS+=	-Wall
 LDFLAGS=	-static -Ttext 0x0
@@ -80,30 +81,35 @@ CFLAGS+=	-I${.CURDIR}/../btx/lib
 # Pick up ../Makefile.inc early.
 .include <bsd.init.mk>
 
-vers.c:	${.CURDIR}/../../common/newvers.sh ${.CURDIR}/version
-	sh ${.CURDIR}/../../common/newvers.sh ${.CURDIR}/version ${NEWVERSWHAT}
+vers.c:	${.CURDIR}/../../common/newvers.sh ${.CURDIR}/../loader/version
+	sh ${.CURDIR}/../../common/newvers.sh ${.CURDIR}/../loader/version \
+		${NEWVERSWHAT}
 
-loader: loader.bin ${BTXLDR} ${BTXKERN}
+${LOADER}: ${LOADER}.bin ${BTXLDR} ${BTXKERN}
 	btxld -v -f aout -e ${LOADER_ADDRESS} -o ${.TARGET} -l ${BTXLDR} \
-		-b ${BTXKERN} loader.bin
+		-b ${BTXKERN} ${LOADER}.bin
 
-loader.bin: loader.sym
+${LOADER}.bin: ${LOADER}.sym
 	cp ${.ALLSRC} ${.TARGET}
 	strip -R .comment -R .note ${.TARGET}
 
 loader.help: help.common help.i386
 	cat ${.ALLSRC} | awk -f ${.CURDIR}/../../common/merge_help.awk > ${.TARGET}
 
+FILES=	${LOADER}
+# XXX INSTALLFLAGS_loader= -b
+FILESMODE_${LOADER}= ${BINMODE} -b
+
+.if !defined(LOADER_ONLY)
 .PATH: ${.CURDIR}/../../forth 
-FILES=	loader loader.help loader.4th support.4th loader.conf
+FILES+=	loader.help loader.4th support.4th loader.conf
 FILES+= screen.4th frames.4th beastie.4th
-# XXX INSTALLFLAGS_loader= -b
-FILESMODE_loader= ${BINMODE} -b
 FILESDIR_loader.conf=	/boot/defaults
 
 .if !exists(${DESTDIR}/boot/loader.rc)
 FILES+=	loader.rc
 .endif
+.endif
 
 # XXX crt0.o needs to be first for pxeboot(8) to work
 OBJS=	${BTXCRT}