Make *_stub.c files available again

In our project we would like to link Haskell functions into C++ code. In principle this works fine using FFI.

An additional constraint, however, is that we need to generate and link the object files ourselves. Alas, ghc no longer keeps the *_stub.c files around. (And fishing for files in /tmp is not a viable solution.)

I would like to propose an additional command line switch to keep *_stub.c files, as previous compiler versions did by default.

(Note that there is an older, similar request #7463 (closed), but our use case is much broader than that and not limited to unregistered compilation.)

Trac metadata

Trac field	Value
Version	7.6.3
Type	FeatureRequest
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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