Removing duplicate DWARF2 info

[Martin v. Loewis]

> Then you can do it using a similar scheme to the way template repositories
> are done, not emitting the actual debug info until right before you link,
> during the recompile.

Are you proposing that every source file is compiled *at least twice*,
once during build and once during linking? I'm sure users of the C++
compiler will love that scheme...

Regards,
Martin