[CMake] set directory for object file generation

[Voisard, Shane S CIV NSWCDD, K54]

Is there a way to set the directory that cmake (2.8) uses for object file generation?  I haven't found an online resource for this.
 
There is a difference when we build the same project on a Windows vs. Linux platform.  
 
On WIN32, cmake creates '<PROJ_NAME>/<PROJ_NAME>.dir/ directory for object files.
 
On UNIX, cmake creates '<PROJ_NAME>/<PROJ_NAME>.dir/ENTIRE/ABS/PATH/TO/<PROJ_NAME> directory for object files.  
 
The problem is that the resulting directory on the Linux platform is 15 dirs deep, and the majority of them are empty.
 
Thanks,
Shane Voisard