checkNonStdWay :: DynFlags -> SrcSpan -> IO (Maybe String)
checkNonStdWay dflags srcspan = do
let tag = buildTag dflags
- if null tag || tag == "dyn" then return Nothing else do
+ if null tag {- || tag == "dyn" -} then return Nothing else do
+ -- see #3604: object files compiled for way "dyn" need to link to the
+ -- dynamic packages, so we can't load them into a statically-linked GHCi.
+ -- we have to treat "dyn" in the same way as "prof".
+ --
+ -- In the future when GHCi is dynamically linked we should be able to relax
+ -- this, but they we may have to make it possible to load either ordinary
+ -- .o files or -dynamic .o files into GHCi (currently that's not possible
+ -- because the dynamic objects contain refs to e.g. __stginit_base_Prelude_dyn
+ -- whereas we have __stginit_base_Prelude_.
let default_osuf = phaseInputExt StopLn
if objectSuf dflags == default_osuf
then failNonStd srcspan