ref: e391b7ec8c0dc746a70725f3fc598def0419d1e6
dir: /sys/src/boot/mkfile/
ARCH=\ bcm\ bitsy\ efi\ pc\ qemu\ reform\ zynq\ all:V: for(i in $ARCH)@{ cd $i mk } installall install:V: for(i in $ARCH) @{ cd $i mk install } clean:V: for(i in $ARCH) @{ cd $i mk clean }