Reload depending on Zonefiles

[Ralf Hildebrandt]

I want to use "make" from a hourly cron-job to automagically issue an 
"ndc reload" whenever a zonefile of a master zone changed.

How do I do this? I have problems to get the Makefile right:

all:    ../../var/run/named.pid
 
../../var/run/named.pid:        floppy.de floppy.net floppy.org macke.org \
                                renraku.com stockmannolsen.com
                                ndc -c /var/spool/named/var/run/ndc reload  

Sorry for being so ignorant.