ref: 11bc8cce33b3922e0fbc4f2d63a42426f6f5a4db dir: /sys/src/9/pc/pcmkfile/
PCFILES=`{../port/mkfilelist ../pc} ^($PCFILES)\.$O:R: '../pc/\1.c' $CC $CFLAGS -.I. ../pc/$stem1.c