Index: share/mk/src.opts.mk
===================================================================
--- share/mk/src.opts.mk
+++ share/mk/src.opts.mk
@@ -177,6 +177,7 @@
     BSD_GREP_FASTMATCH \
     CLANG_EXTRAS \
     DTRACE_TESTS \
+    LOADER_FORCE_LE \
     GNU_GREP_COMPAT \
     HESIOD \
     LIBSOFT \
Index: sys/boot/Makefile.inc
===================================================================
--- sys/boot/Makefile.inc
+++ sys/boot/Makefile.inc
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-.include <bsd.own.mk>
+.include <src.opts.mk>
 
 SSP_CFLAGS=
 
@@ -22,3 +22,11 @@
 # when this test succeeds rather than require dd to be a bootstrap tool.
 DD_NOSTATUS!=(dd status=none count=0 2> /dev/null && echo status=none) || true
 DD=dd ${DD_NOSTATUS}
+
+.if ${MK_LOADER_FORCE_LE} != "no"
+
+.if ${MACHINE_ARCH} == "powerpc64"
+CFLAGS+=	-mlittle-endian
+.endif
+
+.endif