[vtkusers] vtk build for 10.3 and 10.4

[Gavin W. Burris aka 86]

What is the proper way to build VTK on the latest Mac OS X with Xcode?
I want to build VTK and have it run on 10.3 and 10.4.

I found this reference on Apple's developer site:
http://developer.apple.com/documentation/DeveloperTools/Conceptual/cross_development/Using/chapter_3_section_2.html#//apple_ref/doc/uid/20002000-1114311-BABGCAAB

It specifies using the "-isysroot" and "-syslibroot" options in CFLAGS
and LDFLAGS to point to the SDK directory,
"/Developer/SDKs/MacOSX10.3.0.sdk".

and also to export the environment variable MACOSX_DEPLOYMENT_TARGET=10.3

How would you stick this into VTK's cmake setup properly?

Cheers,
-- 
Gavin W. Burris aka 86
Senior Systems Programmer
Penn State Visualization Group
http://viz.aset.psu.edu/ga5in