david, 

thanks for your prompt response. you presented an implementation issue as a 
reason for this behavior - i can understand.
however, do you appreciate the issue of user data getting over written each 
time? in my opinion this represents a serious limitation of cmake on the mac 
when trying to use it for a large, collaborative project where continuous and 
frequent updates are required.

you ask me for an alternative: the mac file system is pretty good at keeping 
track of files independent of file names/paths. couldn't unique file 
handles/hash ids be obtained from just there? these can be used instead and 
presumably provide some stability compared to dynamic pointers in memory (the 
latter change all the time).

regards
 
On Wednesday, March 03, 2010, at 12:44PM, "David Cole" <david.c...@kitware.com> 
wrote:
>
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