1.include "${.CURDIR}/../../platform/${MACHINE_PLATFORM}/Makefile.inc" 2 3SUBDIR= vkernel virtio hyperv vmware 4 5.for dir in ${SUBDIR} 6.if empty(DEV_SUPPORT:Mvirtual) && \ 7 empty(DEV_SUPPORT:Mvirtual/${dir}) && empty(DEV_SUPPORT:Mvirtual/${dir}/*) 8SUBDIR:= ${SUBDIR:N${dir}} 9.endif 10.endfor 11 12.include <bsd.subdir.mk> 13