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This switches the compiler/ component to get compiled with
-XNoImplicitPrelude and a `import GhcPrelude` is inserted in all
modules.
This is motivated by the upcoming "Prelude" re-export of
`Semigroup((<>))` which would cause lots of name clashes in every
modulewhich imports also `Outputable`
Reviewers: austin, goldfire, bgamari, alanz, simonmar
Reviewed By: bgamari
Subscribers: goldfire, rwbarton, thomie, mpickering, bgamari
Differential Revision: https://phabricator.haskell.org/D3989
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IOW, code compiles -Wnoncanonical-monoidfail-instances clean now
This is easy now since we require GHC 8.0/base-4.9 or later
for bootstrapping.
Note that we can easily enable `MonadFail` via
default-extensions: MonadFailDesugaring
in compiler/ghc.cabal.in
which currently would point out that NatM doesn't have
a proper `fail` method, even though failable patterns
are made use of:
compiler/nativeGen/SPARC/CodeGen.hs:425:25: error:
* No instance for (Control.Monad.Fail.MonadFail NatM)
arising from a do statement
with the failable pattern ‘(dyn_c, [dyn_r])’
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GHC 8.2.1 is out, so now GHC's support window only extends back to GHC
8.0. This means we can delete gobs of code that was only used for GHC
7.10 support. Hooray!
Test Plan: ./validate
Reviewers: hvr, bgamari, austin, goldfire, simonmar
Reviewed By: bgamari
Subscribers: Phyx, rwbarton, thomie
Differential Revision: https://phabricator.haskell.org/D3781
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Test Plan: validate
Reviewers: austin, bgamari, simonmar, mpickering
Reviewed By: mpickering
Subscribers: mpickering, rwbarton, thomie
GHC Trac Issues: #12610
Differential Revision: https://phabricator.haskell.org/D3584
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Split out the options needed by the parser from DynFlags, making the
parser more friendly to standalone usage.
Test Plan: validate
Reviewers: simonmar, alanz, bgamari, austin, thomie
Reviewed By: simonmar, alanz, bgamari, thomie
Subscribers: thomie, mpickering
Differential Revision: https://phabricator.haskell.org/D2208
GHC Trac Issues: #10961
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