Incremental compilation with DMD

[Walter Bright]

Tom S wrote:
> As for my own impressions of this idea, its biggest drawback probably is 
> that the multitude of object files created via -multiobj strains the 
> filesystem.

Sure, but -multiobj and -lib generate exactly the same object files, 
it's just that -lib puts them all into a library so it doesn't strain 
the file system.

Extracting the obj files from the lib is pretty simple, you can see the 
libomf.c for the format.