I've discovered that when I sync a file Perforce sets its last modified date/time to the current date/time on my system. This means that if I sync a file to its latest revision, compile it, then resync it to the same revision, the compiler thinks it has compile it again, even though it hasn't changed. It would make more sense for Perforce to maintain the date/time of files in the depot and use this to set the date/time of files when sync'ed. Can this be done?