cc -c -O2 -pipe   -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Wcast-qual  -Wold-style-definition -Wmissing-include-dirs  -Wno-pointer-sign -Winit-self -Wundef -Wno-unused-but-set-variable -std=gnu11 -g -nostdinc -I. -Iinclude -I/usr/src/sys -I/usr/src/sys/../include -I/usr/obj/vk64/VK64DIRFS -I/usr/src/sys/dev/acpica -I/usr/src/sys/contrib/dev/acpica/source/include -I/usr/src/sys/dev/netif/ath/ath_hal -I/usr/src/sys/contrib/dev/ath/ath_hal -I/usr/src/sys/dev/drm/include -I/usr/src/sys/dev/drm/include/drm -I/usr/src/sys/dev/drm/include/uapi -I/usr/src/sys/dev/drm/amd/include  -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h  -Wold-style-declaration -fno-common -ffreestanding -D_KERNEL_VIRTUAL -fno-stack-protector -fno-strict-aliasing -fno-strict-overflow -fno-omit-frame-pointer -mno-mmx -mno-sse -msoft-float -mno-fp-ret-in-387 -mindirect-branch=thunk-inline /usr/src/sys/vfs/dirfs/dirfs_vnops.c 
cc1: warning: include: No such file or directory [-Wmissing-include-dirs]
In file included from /usr/src/sys/../include/stdio.h:42,
                 from /usr/src/sys/vfs/dirfs/dirfs_vnops.c:37:
/usr/src/sys/sys/types.h:44:10: fatal error: machine/endian.h: No such file or directory
 #include <machine/endian.h>
          ^~~~~~~~~~~~~~~~~~
compilation terminated.
*** Error code 1

Stop.
make: stopped making "dirfs_vnops.o" in /usr/obj/vk64/VK64DIRFS