Allow for OS and SUBOS folders so we can introduce NetBSD scripts whilst keeping BSD for all BSD's.

mk/prog.mk

@@ -0,0 +1,19 @@
+# rules to build a library
+# based on FreeBSD's bsd.prog.mk
+
+# Copyright 2008 Roy Marples
+
+BINDIR?=		/sbin
+OBJS+=			${SRCS:.c=.o}
+
+INSTALL?=		install
+
+all: depend ${PROG}
+
+${PROG}: ${SCRIPTS} ${OBJS}
+	${CC} ${CFLAGS} ${LDFLAGS} ${PROGLDFLAGS} -o $@ ${OBJS} ${LDADD}
+
+clean:
+	rm -f ${OBJS} ${PROG} ${CLEANFILES}
+
+include ${MK}/depend.mk