[ITK-dev] New CMake feature creates dll's on Windows without declspec

[Bill Hoffman]

I have created a new feature in CMake that can auto-export symbols in 
shared libraries on Windows like what happens with Linx/Unix compilers. 
  I have a gerrit patch in review with this applied to ITK.  I also 
wrote a blog post that can be found here:

http://www.kitware.com/blog/home/post/939

Initial results with ITK are good.

The disk usage is 14G for the dll build tree.  A static build is 33G, 
and the current ITK limited dll build is 23G.  The compile times are 
faster as well.

http://review.source.kitware.com/#/c/20020

-Bill