GHCi doesn't load .dyn_o files appropriately

Now that GHCi generally defaults to dynamic linking, it handles dynamic object files. But it doesn't implicitly handle the -dynamic-too case appropriately:

$ cat Test.hs
main = return ()

$ ./inplace/bin/ghc-stage2 -dynamic Test.hs
[1 of 1] Compiling Main             ( Test.hs, Test.o )
Linking Test ...

$ ./inplace/bin/ghc-stage2 --interactive Test
GHCi, version 7.8.20140130: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Ok, modules loaded: Main.
Prelude Main> ^D

$ ./inplace/bin/ghc-stage2 -dynamic-too Test.hs
[1 of 1] Compiling Main             ( Test.hs, Test.o )
Linking Test ...

$ ./inplace/bin/ghc-stage2 --interactive Test
GHCi, version 7.8.20140130: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
[1 of 1] Compiling Main             ( Test.hs, interpreted )
Ok, modules loaded: Main.
*Main> 

Also:

$ ./inplace/bin/ghc-stage2 --interactive Test.dyn_o
GHCi, version 7.8.20140130: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Warning: ignoring unrecognised input `Test.dyn_o'
Prelude> 

but it does handle the .o case. This should all be fixed and merged to 7.8 since it'll likely be very annoying.

Trac metadata

Trac field	Value
Version	7.8.1-rc1
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	Compiler
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