y.tab.c generated by byacc
bc.c generated by

sed -f yyval.sed <y.tab.c > bc.c

lib.b is installed at /sys/lib/heirloom/

mkmk -o bc -S -B -a -I../include -I/sys/include/ape/heirloom -D_POSIX_SOURCE -D_SUSV2_SOURCE -D_BSD_EXTENSION bc.c bc.1 > mkfile