Index: sys/boot/i386/Makefile
===================================================================
--- sys/boot/i386/Makefile	(revision 232696)
+++ sys/boot/i386/Makefile	(working copy)
@@ -2,8 +2,8 @@
 
 .include <bsd.own.mk>
 
-SUBDIR=		mbr pmbr boot0 boot0sio btx boot2 cdboot gptboot kgzldr \
-		libi386 libfirewire loader
+SUBDIR=		mbr pmbr boot0 boot0sio btx boot2 boot2ufs1 cdboot gptboot \
+		kgzldr libi386 libfirewire loader
 
 # special boot programs, 'self-extracting boot2+loader'
 SUBDIR+=	pxeldr
Index: sys/boot/i386/boot2/Makefile
===================================================================
--- sys/boot/i386/boot2/Makefile	(revision 232696)
+++ sys/boot/i386/boot2/Makefile	(working copy)
@@ -2,8 +2,10 @@
 
 .include <bsd.own.mk>
 
-FILES=		boot boot1 boot2
+FILES=		boot${BOOT_SUFFIX} boot2${BOOT2_SUFFIX}
 
+SRCDIR=		${.CURDIR}/../boot2
+
 NM?=		nm
 
 # A value of 0x80 enables LBA support.
@@ -18,10 +20,27 @@ ORG1=	0x7c00
 ORG2=	0x2000
 
 # Decide level of UFS support.
+# XXX Currently clang overflows UFS1+UFS2 boot2.
+.if ${MK_CLANG} != "no" && \
+    (${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang")
+BOOT2_UFS?=	UFS2_ONLY
+.else
 BOOT2_UFS?=	UFS1_AND_UFS2
-#BOOT2_UFS?=	UFS2_ONLY
-#BOOT2_UFS?=	UFS1_ONLY
+.endif
 
+.if ${BOOT2_UFS} != UFS1_ONLY
+FILES+=		boot1
+.endif
+.if ${BOOT2_UFS} == UFS1_ONLY
+BOOT_SUFFIX=	.ufs1
+BOOT2_SUFFIX=	ufs1
+.elif ${BOOT2_UFS} == UFS2_ONLY
+BOOT_SUFFIX=	.ufs2
+BOOT2_SUFFIX=	ufs2
+LINKS=		${BINDIR}/boot${BOOT_SUFFIX} ${BINDIR}/boot \
+		${BINDIR}/boot2${BOOT2_SUFFIX} ${BINDIR}/boot2
+.endif
+
 CFLAGS=	-Os \
 	-fno-guess-branch-probability \
 	-fomit-frame-pointer \
@@ -48,10 +67,10 @@ LDFLAGS=-static -N --gc-sections
 # Pick up ../Makefile.inc early.
 .include <bsd.init.mk>
 
-CLEANFILES=	boot
+CLEANFILES=	boot${BOOT_SUFFIX}
 
-boot: boot1 boot2
-	cat boot1 boot2 > boot
+boot${BOOT_SUFFIX}: boot1 boot2${BOOT2_SUFFIX}
+	cat ${.ALLSRC} > ${.TARGET}
 
 CLEANFILES+=	boot1 boot1.out boot1.o
 
@@ -61,10 +80,10 @@ boot1: boot1.out
 boot1.out: boot1.o
 	${LD} ${LDFLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o
 
-CLEANFILES+=	boot2 boot2.ld boot2.ldr boot2.bin boot2.out boot2.o \
-		boot2.s boot2.s.tmp boot2.h sio.o
+CLEANFILES+=	boot2${BOOT2_SUFFIX} boot2.ld boot2.ldr boot2.bin boot2.out \
+		boot2.o boot2.s boot2.s.tmp boot2.h sio.o
 
-boot2: boot2.ld
+boot2${BOOT2_SUFFIX}: boot2.ld
 	@set -- `ls -l boot2.ld`; x=$$((7680-$$5)); \
 	    echo "$$x bytes available"; test $$x -ge 0
 	dd if=boot2.ld of=${.TARGET} obs=7680 conv=osync
@@ -88,7 +107,7 @@ boot2.o: boot2.s
 SRCS=	boot2.c boot2.h
 
 boot2.s: boot2.c boot2.h ${.CURDIR}/../../common/ufsread.c
-	${CC} ${CFLAGS} -S -o boot2.s.tmp ${.CURDIR}/boot2.c
+	${CC} ${CFLAGS} -S -o boot2.s.tmp ${SRCDIR}/boot2.c
 	sed -e '/align/d' -e '/nop/d' < boot2.s.tmp > boot2.s
 	rm -f boot2.s.tmp
 
Index: sys/boot/i386/boot2ufs1/Makefile
===================================================================
--- sys/boot/i386/boot2ufs1/Makefile	(revision 0)
+++ sys/boot/i386/boot2ufs1/Makefile	(working copy)
@@ -0,0 +1,7 @@
+# $FreeBSD$
+
+.PATH: ${.CURDIR}/../boot2
+
+BOOT2_UFS=	UFS1_ONLY
+
+.include "${.CURDIR}/../boot2/Makefile"

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