'make' behaviour in BuildRoot

[Daniel Ng]

> How about mounting the cramfs image and append 'test23' to '/usr'
> inside mounted image, then unmount the image.

Thanks for your comment Suzuki, I realise I can do it the way you suggested but 
what if I start adding several files, or edit some of these files? I would end 
up with a mounted system whose tree structure would be quite different to the 
one in 'build_powerpc/root'. This would just lead to confusion and more of my 
hair falling out. 

Surely I should just be able to type 'make' which would result in the tree 
structure updated in the cramfs image? Any ideas? Where are the BuildRoot 
experts out there? Can someone tell me how to subscribe to the BuildRoot list?

(Sorry I think my original example was a bit too simple).