diff --git a/Makefile.inc1 b/Makefile.inc1
index d292ea97d621..d93928086b22 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -128,7 +128,7 @@ TARGET=		${TARGET_ARCH}
 TARGET?=	${MACHINE}
 TARGET_ARCH?=	${MACHINE_ARCH}
 
-KNOWN_ARCHES?=	amd64 arm i386 i386/pc98 ia64 mips powerpc sparc64 sparc64/sun4v
+KNOWN_ARCHES?=	amd64 arm i386 i386/pc98 ia64 mips powerpc powerpc64/powerpc sparc64 sparc64/sun4v
 .if ${TARGET} == ${TARGET_ARCH}
 _t=		${TARGET}
 .else
@@ -262,34 +262,47 @@ WMAKEENV+=	NO_CTF=1
 .endif
 WMAKE=		${WMAKEENV} ${MAKE} -f Makefile.inc1 DESTDIR=${WORLDTMP}
 
-.if ${TARGET_ARCH} == "amd64"
+.if ${TARGET_ARCH} == "amd64" || ${TARGET_ARCH} == "powerpc64"
 # 32 bit world
 LIB32TMP=	${OBJTREE}${.CURDIR}/lib32
 
+.if ${TARGET_ARCH} == "amd64"
 .if empty(TARGET_CPUTYPE)
 LIB32CPUFLAGS=	-march=i686 -mmmx -msse -msse2
 .else
 LIB32CPUFLAGS=	-march=${TARGET_CPUTYPE}
 .endif
-LIB32FLAGS=	-m32 ${LIB32CPUFLAGS} -mfancy-math-387 -DCOMPAT_32BIT \
+LIB32CPUFLAGS+=	-mfancy-math-387
+LIB32WMAKEENV=	MACHINE=i386 MACHINE_ARCH=i386 \
+		MACHINE_CPU="i686 mmx sse sse2" \
+		LD="${LD} -m elf_i386_fbsd -Y P,${LIB32TMP}/usr/lib32" \
+		AS="${AS} --32"
+
+.elif ${TARGET_ARCH} == "powerpc64"
+.if empty(TARGET_CPUTYPE)
+LIB32CPUFLAGS=	-mcpu=powerpc
+.else
+LIB32CPUFLAGS=	-mcpu=${TARGET_CPUTYPE}
+.endif
+LIB32WMAKEENV=	MACHINE=powerpc MACHINE_ARCH=powerpc \
+		LD="${LD} -m elf32ppc"
+.endif
+
+
+LIB32FLAGS=	-m32 ${LIB32CPUFLAGS} -DCOMPAT_32BIT \
 		-isystem ${LIB32TMP}/usr/include/ \
 		-L${LIB32TMP}/usr/lib32 \
 		-B${LIB32TMP}/usr/lib32
 
 # Yes, the flags are redundant.
-LIB32WMAKEENV=	MAKEOBJDIRPREFIX=${OBJTREE}/lib32 \
+LIB32WMAKEENV+=	MAKEOBJDIRPREFIX=${OBJTREE}/lib32 \
 		_SHLIBDIRPREFIX=${LIB32TMP} \
 		VERSION="${VERSION}" \
-		MACHINE=i386 \
-		MACHINE_ARCH=i386 \
-		MACHINE_CPU="i686 mmx sse sse2" \
 		INSTALL="sh ${.CURDIR}/tools/install.sh" \
 		PATH=${TMPPATH} \
 		CC="${CC} ${LIB32FLAGS}" \
 		CXX="${CXX} ${LIB32FLAGS}" \
 		OBJC="${OBJC} ${LIB32FLAGS}" \
-		LD="${LD} -m elf_i386_fbsd -Y P,${LIB32TMP}/usr/lib32" \
-		AS="${AS} --32" \
 		LIBDIR=/usr/lib32 \
 		SHLIBDIR=/usr/lib32
 
@@ -336,7 +349,7 @@ _worldtmp:
 	@echo "--------------------------------------------------------------"
 .if !defined(NO_CLEAN)
 	rm -rf ${WORLDTMP}
-.if ${TARGET_ARCH} == "amd64"
+.if defined(LIB32TMP)
 	rm -rf ${LIB32TMP}
 .endif
 .else
@@ -380,7 +393,7 @@ _cleanobj:
 	@echo ">>> stage 2.1: cleaning up the object tree"
 	@echo "--------------------------------------------------------------"
 	${_+_}cd ${.CURDIR}; ${WMAKE} ${CLEANDIR:S/^/par-/}
-.if ${TARGET_ARCH} == "amd64"
+.if defined(LIB32TMP)
 	${_+_}cd ${.CURDIR}; ${LIB32WMAKE} -f Makefile.inc1 ${CLEANDIR:S/^/par-/}
 .endif
 .endif
@@ -428,7 +441,7 @@ everything:
 	@echo ">>> stage 4.4: building everything"
 	@echo "--------------------------------------------------------------"
 	${_+_}cd ${.CURDIR}; ${WMAKE} par-all
-.if ${TARGET_ARCH} == "amd64"
+.if defined(LIB32TMP)
 build32:
 	@echo
 	@echo "--------------------------------------------------------------"
@@ -510,7 +523,7 @@ WMAKE_TGTS+=	_cleanobj _obj _build-tools
 WMAKE_TGTS+=	_cross-tools
 .endif
 WMAKE_TGTS+=	_includes _libraries _depend everything
-.if ${TARGET_ARCH} == "amd64" && ${MK_LIB32} != "no"
+.if defined(LIB32TMP) && ${MK_LIB32} != "no"
 WMAKE_TGTS+=	build32
 .endif
 
@@ -660,7 +673,7 @@ reinstall:
 	@echo ">>> Installing everything"
 	@echo "--------------------------------------------------------------"
 	${_+_}cd ${.CURDIR}; ${MAKE} -f Makefile.inc1 install
-.if ${TARGET_ARCH} == "amd64" && ${MK_LIB32} != "no"
+.if defined(LIB32TMP) && ${MK_LIB32} != "no"
 	${_+_}cd ${.CURDIR}; ${MAKE} -f Makefile.inc1 install32
 .endif
 
@@ -669,7 +682,7 @@ redistribute:
 	@echo ">>> Distributing everything"
 	@echo "--------------------------------------------------------------"
 	${_+_}cd ${.CURDIR}; ${MAKE} -f Makefile.inc1 distribute
-.if ${TARGET_ARCH} == "amd64" && ${MK_LIB32} != "no"
+.if defined(LIB32TMP) && ${MK_LIB32} != "no"
 	${_+_}cd ${.CURDIR}; ${MAKE} -f Makefile.inc1 distribute32 \
 	    DISTRIBUTION=lib32
 .endif
@@ -705,8 +718,12 @@ KERNCONF=${KERNFAST}
 KERNCONF=	${KERNEL}
 KERNWARN=
 .else
+.if ${TARGET_ARCH} == "powerpc64"
+KERNCONF?=	GENERIC64
+.else
 KERNCONF?=	GENERIC
 .endif
+.endif
 INSTKERNNAME?=	kernel
 
 KERNSRCDIR?=	${.CURDIR}/sys
@@ -1108,8 +1125,12 @@ _prereq_libs= gnu/lib/libssp/libssp_nonshared gnu/lib/libgcc
 # all shared libraries for ELF.
 #
 _startup_libs=	gnu/lib/csu
-.if exists(${.CURDIR}/lib/csu/${MACHINE_CPUARCH}-elf)
+.if exists(${.CURDIR}/lib/csu/${MACHINE_ARCH}-elf)
+_startup_libs+=	lib/csu/${MACHINE_ARCH}-elf
+.elif exists(${.CURDIR}/lib/csu/${MACHINE_CPUARCH}-elf)
 _startup_libs+=	lib/csu/${MACHINE_CPUARCH}-elf
+.elif exists(${.CURDIR}/lib/csu/${MACHINE_ARCH})
+_startup_libs+=	lib/csu/${MACHINE_ARCH}
 .else
 _startup_libs+=	lib/csu/${MACHINE_CPUARCH}
 .endif
diff --git a/include/Makefile b/include/Makefile
index 96690adb5155..0ba8b17d54ba 100644
--- a/include/Makefile
+++ b/include/Makefile
@@ -56,7 +56,7 @@ LSUBDIRS=	cam/ata cam/scsi \
 
 LSUBSUBDIRS=	dev/mpt/mpilib
 
-.if ${MACHINE_ARCH} == "powerpc"
+.if ${MACHINE_ARCH} == "powerpc" || ${MACHINE_ARCH} == "powerpc64"
 _dev_powermac_nvram=	dev/powermac_nvram
 .endif
 
@@ -189,7 +189,7 @@ copies:
 	${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 *.h \
 	    ${DESTDIR}${INCLUDEDIR}/machine/pc
 .endif
-.if defined(_MARCH)
+.if defined(_MARCH) && exists(${.CURDIR}/../sys/${_MARCH}/include)
 	${INSTALL} -d -o ${BINOWN} -g ${BINGRP} -m 755 \
 	    ${DESTDIR}${INCLUDEDIR}/${_MARCH}; \
 	cd ${.CURDIR}/../sys/${_MARCH}/include; \
@@ -276,7 +276,7 @@ symlinks:
 		    ${DESTDIR}${INCLUDEDIR}/machine/pc; \
 	done
 .endif
-.if defined(_MARCH)
+.if defined(_MARCH) && exists(${.CURDIR}/../sys/${_MARCH}/include)
 	${INSTALL} -d -o ${BINOWN} -g ${BINGRP} -m 755 \
 	    ${DESTDIR}${INCLUDEDIR}/${_MARCH}; \
 	cd ${.CURDIR}/../sys/${_MARCH}/include; \
diff --git a/release/Makefile b/release/Makefile
index 6144fdd4dca4..ced18ac9318c 100644
--- a/release/Makefile
+++ b/release/Makefile
@@ -203,10 +203,16 @@ DISTRIBUTIONS?=	${BASE_DISTS} ${OTHER_DISTS}
 # Build and package both GENERIC and SMP kernels if the target
 # has both configuration files.  Otherwise only GENERIC is done.
 #
-.if exists(${.CURDIR}/../sys/${TARGET}/conf/SMP)
-KERNELS_BASE?=	GENERIC SMP
+.if ${TARGET_ARCH} == "powerpc64"
+KERN_GENERIC?=	GENERIC64
 .else
-KERNELS_BASE?=	GENERIC
+KERN_GENERIC?=	GENERIC
+.endif
+
+.if exists(${.CURDIR}/../sys/${TARGET}/conf/SMP)
+KERNELS_BASE?=	${KERN_GENERIC} SMP
+.else
+KERNELS_BASE?=	${KERN_GENERIC}
 .endif
 
 # mountpoint for filesystems.
@@ -851,7 +857,7 @@ SMALLMFSROOTFLOPPYSET=	${RD}/floppyset/mfsroot-small/mfsroot.gz
 
 # Build boot and install floppies.
 floppies.1:
-	@${ZIPPER} -c ${RD}/kernels/GENERIC/kernel > ${RD}/kernels/kernel.gz
+	@${ZIPPER} -c ${RD}/kernels/${KERN_GENERIC}/kernel > ${RD}/kernels/kernel.gz
 	@echo "Making the kernel boot floppies..."
 	@cd ${.CURDIR} && ${MAKE} makeFloppySet FLOPPYBASE=kern \
 	    FLOPPYDESC="Kernel" SPLITFILE=${RD}/kernels/kernel.gz
@@ -985,7 +991,7 @@ cdrom.1:
 	done
 .endif
 	@echo "Copy GENERIC kernel to boot area"
-	@cp -Rp ${RD}/kernels/GENERIC/ ${CD_LIVEFS}/boot/kernel
+	@cp -Rp ${RD}/kernels/${KERN_GENERIC}/ ${CD_LIVEFS}/boot/kernel
 	@rm -f ${CD_LIVEFS}/boot/kernel/*.symbols
 	@rm -f ${CD_LIVEFS}/.profile
 	@cp ${.CURDIR}/fixit.profile ${CD_LIVEFS}/.profile
@@ -1003,7 +1009,7 @@ cdrom.1:
 .endif
 	@echo "CD_VERSION = ${BUILDNAME}" > ${CD_LIVEFS}/cdrom.inf
 .if defined(MAKE_DVD)
-	@cp -Rp ${RD}/kernels/GENERIC/ ${CD_DVD1}/boot/kernel
+	@cp -Rp ${RD}/kernels/${KERN_GENERIC}/ ${CD_DVD1}/boot/kernel
 	@rm -f ${CD_DVD1}/boot/kernel/*.symbols
 	@rm -f ${CD_DVD1}/.profile
 	@cp ${.CURDIR}/fixit.profile ${CD_DVD1}/.profile
@@ -1321,7 +1327,7 @@ makeFloppySet:
 IMAGEDIR=	${RD}/image.${FSIMAGE}
 BOOTDIR=	${RD}/trees/base/boot
 HINTSFILE=	${BOOTDIR}/device.hints
-ACPI_KO=	${RD}/kernels/GENERIC/acpi.ko
+ACPI_KO=	${RD}/kernels/${KERN_GENERIC}/acpi.ko
 IMAGEFILE=	${RD}/floppies/${FSIMAGE}.flp
 .if defined(FDSIZE) && ${FDSIZE} == "SMALL"
 FLPSIZE=	${SMALLFLOPPYSIZE}