[Cmake] make install behavoir

[Andy Preston]

I'm currently using cmake 1.8.3 under Linux. The command "make install" 
has a couple of behavoirs that I think would make it more consistant 
with "normal" Linux bahavoir. Currently I only use it to install header 
files to another directory.

#1 The date time stamp is not preserved. Either there should be a 
date/time/(size?) check done for each file and only copy  if the source 
file is newer than the old. Alternatively the file can still be copied 
provided the date/time stamp is preserved from the source file. I have 
unnecessary rebuilds happening since unchanged header files are getting 
overwritten and their data/time stamp is changed.

#2 "make install" normally runs "make all" first under Linux. I don't 
mind this behavoir but it's inconsistant to the expectations of most 
people I'm guessing.

thanks, HTH,

Andy