simonpj@microsoft.com writes:

...

....Josef wanting to squirrel away ExtCore and .hi's only....

This would be a Good Thing and not too hard. How would you like to specify where to stop? "After the last blob of debug output" might be a reasonable answer, but we definitely also want to be able to carry on. Yet another flag?

FWIW, GHCen up until 5.xx let you achieve this with their command line options, e.g., foo$ ghc-4.08.2 -noC foo.hs -ddump-ds -ohi Foo.hi ..... foo$ --sigbjorn