ref: 5c1feb0ef0b795e5de71e956f9ccddcd5c4b7f21
dir: /sys/src/9/mkfile/
ARCH=\ bcm\ kw\ mtx\ omap\ pc\ pc64\ ppc\ sgi\ teg2\ xen\ 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 }