    {-# LANGUAGE RecordWildCards #-}

    -- | This module manages storing the various GHC option flags in a modules
    -- interface file as part of the recompilation checking infrastructure.
    module GHC.Iface.Recomp.Flags (
            fingerprintDynFlags
          , fingerprintOptFlags
          , fingerprintHpcFlags
        ) where

    import GHC.Prelude

    import GHC.Driver.Session
    import GHC.Driver.Env

    import GHC.Utils.Binary
    import GHC.Unit.Module
    import GHC.Types.Name
    import GHC.Types.SafeHaskell
    import GHC.Utils.Fingerprint
    import GHC.Iface.Recomp.Binary
    import GHC.Core.Opt.CallerCC () -- for Binary instances

    import GHC.Data.EnumSet as EnumSet
    import System.FilePath (normalise)

    -- | Produce a fingerprint of a @DynFlags@ value. We only base
    -- the finger print on important fields in @DynFlags@ so that
    -- the recompilation checker can use this fingerprint.
    --
    -- NB: The 'Module' parameter is the 'Module' recorded by the
    -- *interface* file, not the actual 'Module' according to our
    -- 'DynFlags'.
    fingerprintDynFlags :: HscEnv -> Module
                        -> (BinHandle -> Name -> IO ())
                        -> IO Fingerprint

    fingerprintDynFlags :: HscEnv -> Module -> (BinHandle -> Name -> IO ()) -> IO Fingerprint
    fingerprintDynFlags HscEnv
    hsc_env Module
    this_mod BinHandle -> Name -> IO ()
    nameio =
        let dflags :: DynFlags
    dflags@DynFlags{Bool
    Int
    String
    [Int]
    [String]
    [(String, String)]
    [(ModuleName, String)]
    [(ModuleName, Module)]
    [ModuleName]
    [CallerCcFilter]
    [Option]
    [IgnorePackageFlag]
    [PackageDBFlag]
    [PackageFlag]
    [TrustFlag]
    [OnOff Extension]
    Maybe Int
    Maybe String
    Maybe (String, Int)
    Maybe UnitId
    Maybe BmiVersion
    Maybe SseVersion
    Maybe Language
    Word
    IORef Bool
    IORef (Maybe CompilerInfo)
    IORef (Maybe LinkerInfo)
    IORef (ModuleEnv Int)
    Ways
    UnfoldingOpts
    ModuleName
    EnumSet Extension
    EnumSet DumpFlag
    EnumSet GeneralFlag
    EnumSet WarningFlag
    UnitId
    OverridingBool
    Platform
    PlatformMisc
    Backend
    FileSettings
    GhcNameVersion
    ToolSettings
    Scheme
    Weights
    SrcSpan
    SafeHaskellMode
    IntWithInf
    DynLibLoader
    FlushErr
    FlushOut
    GhcLink
    GhcMode
    IncludeSpecs
    LlvmConfig
    ProfAuto
    RtsOptsEnabled
    warningFlags :: DynFlags -> EnumSet WarningFlag
    warnUnsafeOnLoc :: DynFlags -> SrcSpan
    warnSafeOnLoc :: DynFlags -> SrcSpan
    verbosity :: DynFlags -> Int
    useUnicode :: DynFlags -> Bool
    useColor :: DynFlags -> OverridingBool
    uniqueIncrement :: DynFlags -> Int
    unfoldingOpts :: DynFlags -> UnfoldingOpts
    trustworthyOnLoc :: DynFlags -> SrcSpan
    trustFlags :: DynFlags -> [TrustFlag]
    toolSettings :: DynFlags -> ToolSettings
    thOnLoc :: DynFlags -> SrcSpan
    targetWays_ :: DynFlags -> Ways
    stubDir :: DynFlags -> Maybe String
    strictnessBefore :: DynFlags -> [Int]
    sseVersion :: DynFlags -> Maybe SseVersion
    splitInfo :: DynFlags -> Maybe (String, Int)
    specConstrThreshold :: DynFlags -> Maybe Int
    specConstrRecursive :: DynFlags -> Int
    specConstrCount :: DynFlags -> Maybe Int
    solverIterations :: DynFlags -> IntWithInf
    simplTickFactor :: DynFlags -> Int
    simplPhases :: DynFlags -> Int
    safeInferred :: DynFlags -> Bool
    safeInfer :: DynFlags -> Bool
    safeHaskell :: DynFlags -> SafeHaskellMode
    ruleCheck :: DynFlags -> Maybe String
    rtsOptsSuggestions :: DynFlags -> Bool
    rtsOptsEnabled :: DynFlags -> RtsOptsEnabled
    rtsOpts :: DynFlags -> Maybe String
    rtldInfo :: DynFlags -> IORef (Maybe LinkerInfo)
    rtccInfo :: DynFlags -> IORef (Maybe CompilerInfo)
    reverseErrors :: DynFlags -> Bool
    refLevelHoleFits :: DynFlags -> Maybe Int
    reductionDepth :: DynFlags -> IntWithInf
    rawSettings :: DynFlags -> [(String, String)]
    profAuto :: DynFlags -> ProfAuto
    pprUserLength :: DynFlags -> Int
    pprCols :: DynFlags -> Int
    pluginPackageFlags :: DynFlags -> [PackageFlag]
    pluginModNames :: DynFlags -> [ModuleName]
    pluginModNameOpts :: DynFlags -> [(ModuleName, String)]
    platformMisc :: DynFlags -> PlatformMisc
    pkgTrustOnLoc :: DynFlags -> SrcSpan
    parMakeCount :: DynFlags -> Maybe Int
    packageFlags :: DynFlags -> [PackageFlag]
    packageEnv :: DynFlags -> Maybe String
    packageDBFlags :: DynFlags -> [PackageDBFlag]
    overlapInstLoc :: DynFlags -> SrcSpan
    outputHi :: DynFlags -> Maybe String
    outputFile_ :: DynFlags -> Maybe String
    optLevel :: DynFlags -> Int
    objectSuf_ :: DynFlags -> String
    objectDir :: DynFlags -> Maybe String
    nextWrapperNum :: DynFlags -> IORef (ModuleEnv Int)
    newDerivOnLoc :: DynFlags -> SrcSpan
    maxWorkerArgs :: DynFlags -> Int
    maxValidHoleFits :: DynFlags -> Maybe Int
    maxUncoveredPatterns :: DynFlags -> Int
    maxSimplIterations :: DynFlags -> Int
    maxRelevantBinds :: DynFlags -> Maybe Int
    maxRefHoleFits :: DynFlags -> Maybe Int
    maxPmCheckModels :: DynFlags -> Int
    maxInlineMemsetInsns :: DynFlags -> Int
    maxInlineMemcpyInsns :: DynFlags -> Int
    maxInlineAllocSize :: DynFlags -> Int
    maxErrors :: DynFlags -> Maybe Int
    mainModuleNameIs :: DynFlags -> ModuleName
    mainFunIs :: DynFlags -> Maybe String
    llvmConfig :: DynFlags -> LlvmConfig
    liftLamsRecArgs :: DynFlags -> Maybe Int
    liftLamsNonRecArgs :: DynFlags -> Maybe Int
    liftLamsKnown :: DynFlags -> Bool
    libraryPaths :: DynFlags -> [String]
    liberateCaseThreshold :: DynFlags -> Maybe Int
    ldInputs :: DynFlags -> [Option]
    language :: DynFlags -> Maybe Language
    interactivePrint :: DynFlags -> Maybe String
    inlineCheck :: DynFlags -> Maybe String
    initialUnique :: DynFlags -> Word
    incoherentOnLoc :: DynFlags -> SrcSpan
    includePaths :: DynFlags -> IncludeSpecs
    importPaths :: DynFlags -> [String]
    ignorePackageFlags :: DynFlags -> [IgnorePackageFlag]
    hpcDir :: DynFlags -> String
    homeUnitInstantiations_ :: DynFlags -> [(ModuleName, Module)]
    homeUnitInstanceOf_ :: DynFlags -> Maybe UnitId
    homeUnitId_ :: DynFlags -> UnitId
    historySize :: DynFlags -> Int
    hieSuf :: DynFlags -> String
    hieDir :: DynFlags -> Maybe String
    hiSuf_ :: DynFlags -> String
    hiDir :: DynFlags -> Maybe String
    hcSuf :: DynFlags -> String
    haddockOptions :: DynFlags -> Maybe String
    ghciScripts :: DynFlags -> [String]
    ghciHistSize :: DynFlags -> Int
    ghcVersionFile :: DynFlags -> Maybe String
    ghcNameVersion :: DynFlags -> GhcNameVersion
    ghcMode :: DynFlags -> GhcMode
    ghcLink :: DynFlags -> GhcLink
    ghcHeapSize :: DynFlags -> Maybe Int
    generalFlags :: DynFlags -> EnumSet GeneralFlag
    frontendPluginOpts :: DynFlags -> [String]
    frameworkPaths :: DynFlags -> [String]
    flushOut :: DynFlags -> FlushOut
    flushErr :: DynFlags -> FlushErr
    floatLamArgs :: DynFlags -> Maybe Int
    fileSettings :: DynFlags -> FileSettings
    fatalWarningFlags :: DynFlags -> EnumSet WarningFlag
    extensions :: DynFlags -> [OnOff Extension]
    extensionFlags :: DynFlags -> EnumSet Extension
    enableTimeStats :: DynFlags -> Bool
    dynamicTooFailed :: DynFlags -> IORef Bool
    dynamicNow :: DynFlags -> Bool
    dynOutputHi :: DynFlags -> Maybe String
    dynOutputFile_ :: DynFlags -> Maybe String
    dynObjectSuf_ :: DynFlags -> String
    dynLibLoader :: DynFlags -> DynLibLoader
    dynHiSuf_ :: DynFlags -> String
    dylibInstallName :: DynFlags -> Maybe String
    dumpPrefixForce :: DynFlags -> Maybe String
    dumpPrefix :: DynFlags -> Maybe String
    dumpFlags :: DynFlags -> EnumSet DumpFlag
    dumpDir :: DynFlags -> Maybe String
    deriveViaOnLoc :: DynFlags -> SrcSpan
    depSuffixes :: DynFlags -> [String]
    depMakefile :: DynFlags -> String
    depIncludePkgDeps :: DynFlags -> Bool
    depIncludeCppDeps :: DynFlags -> Bool
    depExcludeMods :: DynFlags -> [ModuleName]
    debugLevel :: DynFlags -> Int
    colScheme :: DynFlags -> Scheme
    cmmProcAlignment :: DynFlags -> Maybe Int
    cmdlineFrameworks :: DynFlags -> [String]
    cfgWeights :: DynFlags -> Weights
    canUseColor :: DynFlags -> Bool
    callerCcFilters :: DynFlags -> [CallerCcFilter]
    bmiVersion :: DynFlags -> Maybe BmiVersion
    binBlobThreshold :: DynFlags -> Word
    backend :: DynFlags -> Backend
    avx512pf :: DynFlags -> Bool
    avx512f :: DynFlags -> Bool
    avx512er :: DynFlags -> Bool
    avx512cd :: DynFlags -> Bool
    avx2 :: DynFlags -> Bool
    avx :: DynFlags -> Bool
    targetPlatform :: DynFlags -> Platform
    cfgWeights :: Weights
    uniqueIncrement :: Int
    initialUnique :: Word
    maxErrors :: Maybe Int
    reverseErrors :: Bool
    maxInlineMemsetInsns :: Int
    maxInlineMemcpyInsns :: Int
    maxInlineAllocSize :: Int
    rtccInfo :: IORef (Maybe CompilerInfo)
    rtldInfo :: IORef (Maybe LinkerInfo)
    avx512pf :: Bool
    avx512f :: Bool
    avx512er :: Bool
    avx512cd :: Bool
    avx2 :: Bool
    avx :: Bool
    bmiVersion :: Maybe BmiVersion
    sseVersion :: Maybe SseVersion
    nextWrapperNum :: IORef (ModuleEnv Int)
    interactivePrint :: Maybe String
    callerCcFilters :: [CallerCcFilter]
    profAuto :: ProfAuto
    colScheme :: Scheme
    canUseColor :: Bool
    useColor :: OverridingBool
    useUnicode :: Bool
    pprCols :: Int
    pprUserLength :: Int
    ghciScripts :: [String]
    haddockOptions :: Maybe String
    ghcVersionFile :: Maybe String
    flushErr :: FlushErr
    flushOut :: FlushOut
    ghciHistSize :: Int
    maxWorkerArgs :: Int
    unfoldingOpts :: UnfoldingOpts
    extensionFlags :: EnumSet Extension
    extensions :: [OnOff Extension]
    trustworthyOnLoc :: SrcSpan
    warnUnsafeOnLoc :: SrcSpan
    warnSafeOnLoc :: SrcSpan
    pkgTrustOnLoc :: SrcSpan
    incoherentOnLoc :: SrcSpan
    overlapInstLoc :: SrcSpan
    deriveViaOnLoc :: SrcSpan
    newDerivOnLoc :: SrcSpan
    thOnLoc :: SrcSpan
    safeInferred :: Bool
    safeInfer :: Bool
    safeHaskell :: SafeHaskellMode
    language :: Maybe Language
    fatalWarningFlags :: EnumSet WarningFlag
    warningFlags :: EnumSet WarningFlag
    generalFlags :: EnumSet GeneralFlag
    dumpFlags :: EnumSet DumpFlag
    packageEnv :: Maybe String
    trustFlags :: [TrustFlag]
    pluginPackageFlags :: [PackageFlag]
    packageFlags :: [PackageFlag]
    ignorePackageFlags :: [IgnorePackageFlag]
    packageDBFlags :: [PackageDBFlag]
    depSuffixes :: [String]
    depExcludeMods :: [ModuleName]
    depIncludeCppDeps :: Bool
    depIncludePkgDeps :: Bool
    depMakefile :: String
    frontendPluginOpts :: [String]
    pluginModNameOpts :: [(ModuleName, String)]
    pluginModNames :: [ModuleName]
    hpcDir :: String
    rtsOptsSuggestions :: Bool
    rtsOptsEnabled :: RtsOptsEnabled
    rtsOpts :: Maybe String
    cmdlineFrameworks :: [String]
    frameworkPaths :: [String]
    libraryPaths :: [String]
    includePaths :: IncludeSpecs
    ldInputs :: [Option]
    dumpPrefixForce :: Maybe String
    dumpPrefix :: Maybe String
    dynamicNow :: Bool
    dynLibLoader :: DynLibLoader
    dynOutputHi :: Maybe String
    outputHi :: Maybe String
    dynOutputFile_ :: Maybe String
    outputFile_ :: Maybe String
    dynHiSuf_ :: String
    dynObjectSuf_ :: String
    dynamicTooFailed :: IORef Bool
    hieSuf :: String
    hiSuf_ :: String
    hcSuf :: String
    objectSuf_ :: String
    dumpDir :: Maybe String
    stubDir :: Maybe String
    hieDir :: Maybe String
    hiDir :: Maybe String
    dylibInstallName :: Maybe String
    objectDir :: Maybe String
    splitInfo :: Maybe (String, Int)
    targetWays_ :: Ways
    homeUnitInstantiations_ :: [(ModuleName, Module)]
    homeUnitInstanceOf_ :: Maybe UnitId
    homeUnitId_ :: UnitId
    solverIterations :: IntWithInf
    reductionDepth :: IntWithInf
    mainFunIs :: Maybe String
    mainModuleNameIs :: ModuleName
    importPaths :: [String]
    historySize :: Int
    cmmProcAlignment :: Maybe Int
    liftLamsKnown :: Bool
    liftLamsNonRecArgs :: Maybe Int
    liftLamsRecArgs :: Maybe Int
    floatLamArgs :: Maybe Int
    liberateCaseThreshold :: Maybe Int
    binBlobThreshold :: Word
    specConstrRecursive :: Int
    specConstrCount :: Maybe Int
    specConstrThreshold :: Maybe Int
    simplTickFactor :: Int
    maxPmCheckModels :: Int
    maxUncoveredPatterns :: Int
    refLevelHoleFits :: Maybe Int
    maxRefHoleFits :: Maybe Int
    maxValidHoleFits :: Maybe Int
    maxRelevantBinds :: Maybe Int
    ghcHeapSize :: Maybe Int
    enableTimeStats :: Bool
    parMakeCount :: Maybe Int
    strictnessBefore :: [Int]
    inlineCheck :: Maybe String
    ruleCheck :: Maybe String
    maxSimplIterations :: Int
    simplPhases :: Int
    debugLevel :: Int
    optLevel :: Int
    verbosity :: Int
    llvmConfig :: LlvmConfig
    rawSettings :: [(String, String)]
    platformMisc :: PlatformMisc
    toolSettings :: ToolSettings
    targetPlatform :: Platform
    fileSettings :: FileSettings
    ghcNameVersion :: GhcNameVersion
    backend :: Backend
    ghcLink :: GhcLink
    ghcMode :: GhcMode
    ..} = HscEnv -> DynFlags
    hsc_dflags HscEnv
    hsc_env
            mainis :: Maybe (Maybe String)
    mainis   = if HscEnv -> Module
    mainModIs HscEnv
    hsc_env Module -> Module -> Bool
    forall a. Eq a => a -> a -> Bool
    == Module
    this_mod then Maybe String -> Maybe (Maybe String)
    forall a. a -> Maybe a
    Just Maybe String
    mainFunIs else Maybe (Maybe String)
    forall a. Maybe a
    Nothing
                          -- see #5878
            -- pkgopts  = (homeUnit home_unit, sort $ packageFlags dflags)
            safeHs :: IfaceTrustInfo
    safeHs   = SafeHaskellMode -> IfaceTrustInfo
    setSafeMode SafeHaskellMode
    safeHaskell
            -- oflags   = sort $ filter filterOFlags $ flags dflags

            -- *all* the extension flags and the language
            lang :: (Maybe Int, [Int])
    lang = ((Language -> Int) -> Maybe Language -> Maybe Int
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    fmap Language -> Int
    forall a. Enum a => a -> Int
    fromEnum Maybe Language
    language,
                    (Extension -> Int) -> [Extension] -> [Int]
    forall a b. (a -> b) -> [a] -> [b]
    map Extension -> Int
    forall a. Enum a => a -> Int
    fromEnum ([Extension] -> [Int]) -> [Extension] -> [Int]
    forall a b. (a -> b) -> a -> b
    $ EnumSet Extension -> [Extension]
    forall a. Enum a => EnumSet a -> [a]
    EnumSet.toList EnumSet Extension
    extensionFlags)

            -- avoid fingerprinting the absolute path to the directory of the source file
            -- see note [Implicit include paths]
            includePathsMinusImplicit :: IncludeSpecs
    includePathsMinusImplicit = IncludeSpecs
    includePaths { includePathsQuoteImplicit :: [String]
    includePathsQuoteImplicit = [] }

            -- -I, -D and -U flags affect CPP
            cpp :: ([String], [String], ([String], Fingerprint))
    cpp = ( (String -> String) -> [String] -> [String]
    forall a b. (a -> b) -> [a] -> [b]
    map String -> String
    normalise ([String] -> [String]) -> [String] -> [String]
    forall a b. (a -> b) -> a -> b
    $ IncludeSpecs -> [String]
    flattenIncludes IncludeSpecs
    includePathsMinusImplicit
                -- normalise: eliminate spurious differences due to "./foo" vs "foo"
                  , DynFlags -> [String]
    picPOpts DynFlags
    dflags
                  , DynFlags -> ([String], Fingerprint)
    opt_P_signature DynFlags
    dflags)
                -- See Note [Repeated -optP hashing]

            -- Note [path flags and recompilation]
            paths :: [String]
    paths = [ String
    hcSuf ]

            -- -fprof-auto etc.
            prof :: Int
    prof = if DynFlags -> Bool
    sccProfilingEnabled DynFlags
    dflags then ProfAuto -> Int
    forall a. Enum a => a -> Int
    fromEnum ProfAuto
    profAuto else Int
    0

            -- Ticky
            ticky :: [Bool]
    ticky =
              (GeneralFlag -> Bool) -> [GeneralFlag] -> [Bool]
    forall a b. (a -> b) -> [a] -> [b]
    map (GeneralFlag -> DynFlags -> Bool
    `gopt` DynFlags
    dflags) [GeneralFlag
    Opt_Ticky, GeneralFlag
    Opt_Ticky_Allocd, GeneralFlag
    Opt_Ticky_LNE, GeneralFlag
    Opt_Ticky_Dyn_Thunk]

            flags :: ((Maybe (Maybe String), IfaceTrustInfo, (Maybe Int, [Int]),
      ([String], [String], ([String], Fingerprint))),
     ([String], Int, [Bool], Int, [CallerCcFilter]))
    flags = ((Maybe (Maybe String)
    mainis, IfaceTrustInfo
    safeHs, (Maybe Int, [Int])
    lang, ([String], [String], ([String], Fingerprint))
    cpp), ([String]
    paths, Int
    prof, [Bool]
    ticky, Int
    debugLevel, [CallerCcFilter]
    callerCcFilters))

        in -- pprTrace "flags" (ppr flags) $
           (BinHandle -> Name -> IO ())
    -> ((Maybe (Maybe String), IfaceTrustInfo, (Maybe Int, [Int]),
         ([String], [String], ([String], Fingerprint))),
        ([String], Int, [Bool], Int, [CallerCcFilter]))
    -> IO Fingerprint
    forall a.
    Binary a =>
    (BinHandle -> Name -> IO ()) -> a -> IO Fingerprint
    computeFingerprint BinHandle -> Name -> IO ()
    nameio ((Maybe (Maybe String), IfaceTrustInfo, (Maybe Int, [Int]),
      ([String], [String], ([String], Fingerprint))),
     ([String], Int, [Bool], Int, [CallerCcFilter]))
    flags

    -- Fingerprint the optimisation info. We keep this separate from the rest of
    -- the flags because GHCi users (especially) may wish to ignore changes in
    -- optimisation level or optimisation flags so as to use as many pre-existing
    -- object files as they can.
    -- See Note [Ignoring some flag changes]
    fingerprintOptFlags :: DynFlags
                          -> (BinHandle -> Name -> IO ())
                          -> IO Fingerprint
    fingerprintOptFlags :: DynFlags -> (BinHandle -> Name -> IO ()) -> IO Fingerprint
    fingerprintOptFlags DynFlags{Bool
    Int
    String
    [Int]
    [String]
    [(String, String)]
    [(ModuleName, String)]
    [(ModuleName, Module)]
    [ModuleName]
    [CallerCcFilter]
    [Option]
    [IgnorePackageFlag]
    [PackageDBFlag]
    [PackageFlag]
    [TrustFlag]
    [OnOff Extension]
    Maybe Int
    Maybe String
    Maybe (String, Int)
    Maybe UnitId
    Maybe BmiVersion
    Maybe SseVersion
    Maybe Language
    Word
    IORef Bool
    IORef (Maybe CompilerInfo)
    IORef (Maybe LinkerInfo)
    IORef (ModuleEnv Int)
    Ways
    UnfoldingOpts
    ModuleName
    EnumSet Extension
    EnumSet DumpFlag
    EnumSet GeneralFlag
    EnumSet WarningFlag
    UnitId
    OverridingBool
    Platform
    PlatformMisc
    Backend
    FileSettings
    GhcNameVersion
    ToolSettings
    Scheme
    Weights
    SrcSpan
    SafeHaskellMode
    IntWithInf
    DynLibLoader
    FlushErr
    FlushOut
    GhcLink
    GhcMode
    IncludeSpecs
    LlvmConfig
    ProfAuto
    RtsOptsEnabled
    cfgWeights :: Weights
    uniqueIncrement :: Int
    initialUnique :: Word
    maxErrors :: Maybe Int
    reverseErrors :: Bool
    maxInlineMemsetInsns :: Int
    maxInlineMemcpyInsns :: Int
    maxInlineAllocSize :: Int
    rtccInfo :: IORef (Maybe CompilerInfo)
    rtldInfo :: IORef (Maybe LinkerInfo)
    avx512pf :: Bool
    avx512f :: Bool
    avx512er :: Bool
    avx512cd :: Bool
    avx2 :: Bool
    avx :: Bool
    bmiVersion :: Maybe BmiVersion
    sseVersion :: Maybe SseVersion
    nextWrapperNum :: IORef (ModuleEnv Int)
    interactivePrint :: Maybe String
    callerCcFilters :: [CallerCcFilter]
    profAuto :: ProfAuto
    colScheme :: Scheme
    canUseColor :: Bool
    useColor :: OverridingBool
    useUnicode :: Bool
    pprCols :: Int
    pprUserLength :: Int
    ghciScripts :: [String]
    haddockOptions :: Maybe String
    ghcVersionFile :: Maybe String
    flushErr :: FlushErr
    flushOut :: FlushOut
    ghciHistSize :: Int
    maxWorkerArgs :: Int
    unfoldingOpts :: UnfoldingOpts
    extensionFlags :: EnumSet Extension
    extensions :: [OnOff Extension]
    trustworthyOnLoc :: SrcSpan
    warnUnsafeOnLoc :: SrcSpan
    warnSafeOnLoc :: SrcSpan
    pkgTrustOnLoc :: SrcSpan
    incoherentOnLoc :: SrcSpan
    overlapInstLoc :: SrcSpan
    deriveViaOnLoc :: SrcSpan
    newDerivOnLoc :: SrcSpan
    thOnLoc :: SrcSpan
    safeInferred :: Bool
    safeInfer :: Bool
    safeHaskell :: SafeHaskellMode
    language :: Maybe Language
    fatalWarningFlags :: EnumSet WarningFlag
    warningFlags :: EnumSet WarningFlag
    generalFlags :: EnumSet GeneralFlag
    dumpFlags :: EnumSet DumpFlag
    packageEnv :: Maybe String
    trustFlags :: [TrustFlag]
    pluginPackageFlags :: [PackageFlag]
    packageFlags :: [PackageFlag]
    ignorePackageFlags :: [IgnorePackageFlag]
    packageDBFlags :: [PackageDBFlag]
    depSuffixes :: [String]
    depExcludeMods :: [ModuleName]
    depIncludeCppDeps :: Bool
    depIncludePkgDeps :: Bool
    depMakefile :: String
    frontendPluginOpts :: [String]
    pluginModNameOpts :: [(ModuleName, String)]
    pluginModNames :: [ModuleName]
    hpcDir :: String
    rtsOptsSuggestions :: Bool
    rtsOptsEnabled :: RtsOptsEnabled
    rtsOpts :: Maybe String
    cmdlineFrameworks :: [String]
    frameworkPaths :: [String]
    libraryPaths :: [String]
    includePaths :: IncludeSpecs
    ldInputs :: [Option]
    dumpPrefixForce :: Maybe String
    dumpPrefix :: Maybe String
    dynamicNow :: Bool
    dynLibLoader :: DynLibLoader
    dynOutputHi :: Maybe String
    outputHi :: Maybe String
    dynOutputFile_ :: Maybe String
    outputFile_ :: Maybe String
    dynHiSuf_ :: String
    dynObjectSuf_ :: String
    dynamicTooFailed :: IORef Bool
    hieSuf :: String
    hiSuf_ :: String
    hcSuf :: String
    objectSuf_ :: String
    dumpDir :: Maybe String
    stubDir :: Maybe String
    hieDir :: Maybe String
    hiDir :: Maybe String
    dylibInstallName :: Maybe String
    objectDir :: Maybe String
    splitInfo :: Maybe (String, Int)
    targetWays_ :: Ways
    homeUnitInstantiations_ :: [(ModuleName, Module)]
    homeUnitInstanceOf_ :: Maybe UnitId
    homeUnitId_ :: UnitId
    solverIterations :: IntWithInf
    reductionDepth :: IntWithInf
    mainFunIs :: Maybe String
    mainModuleNameIs :: ModuleName
    importPaths :: [String]
    historySize :: Int
    cmmProcAlignment :: Maybe Int
    liftLamsKnown :: Bool
    liftLamsNonRecArgs :: Maybe Int
    liftLamsRecArgs :: Maybe Int
    floatLamArgs :: Maybe Int
    liberateCaseThreshold :: Maybe Int
    binBlobThreshold :: Word
    specConstrRecursive :: Int
    specConstrCount :: Maybe Int
    specConstrThreshold :: Maybe Int
    simplTickFactor :: Int
    maxPmCheckModels :: Int
    maxUncoveredPatterns :: Int
    refLevelHoleFits :: Maybe Int
    maxRefHoleFits :: Maybe Int
    maxValidHoleFits :: Maybe Int
    maxRelevantBinds :: Maybe Int
    ghcHeapSize :: Maybe Int
    enableTimeStats :: Bool
    parMakeCount :: Maybe Int
    strictnessBefore :: [Int]
    inlineCheck :: Maybe String
    ruleCheck :: Maybe String
    maxSimplIterations :: Int
    simplPhases :: Int
    debugLevel :: Int
    optLevel :: Int
    verbosity :: Int
    llvmConfig :: LlvmConfig
    rawSettings :: [(String, String)]
    platformMisc :: PlatformMisc
    toolSettings :: ToolSettings
    targetPlatform :: Platform
    fileSettings :: FileSettings
    ghcNameVersion :: GhcNameVersion
    backend :: Backend
    ghcLink :: GhcLink
    ghcMode :: GhcMode
    warningFlags :: DynFlags -> EnumSet WarningFlag
    warnUnsafeOnLoc :: DynFlags -> SrcSpan
    warnSafeOnLoc :: DynFlags -> SrcSpan
    verbosity :: DynFlags -> Int
    useUnicode :: DynFlags -> Bool
    useColor :: DynFlags -> OverridingBool
    uniqueIncrement :: DynFlags -> Int
    unfoldingOpts :: DynFlags -> UnfoldingOpts
    trustworthyOnLoc :: DynFlags -> SrcSpan
    trustFlags :: DynFlags -> [TrustFlag]
    toolSettings :: DynFlags -> ToolSettings
    thOnLoc :: DynFlags -> SrcSpan
    targetWays_ :: DynFlags -> Ways
    stubDir :: DynFlags -> Maybe String
    strictnessBefore :: DynFlags -> [Int]
    sseVersion :: DynFlags -> Maybe SseVersion
    splitInfo :: DynFlags -> Maybe (String, Int)
    specConstrThreshold :: DynFlags -> Maybe Int
    specConstrRecursive :: DynFlags -> Int
    specConstrCount :: DynFlags -> Maybe Int
    solverIterations :: DynFlags -> IntWithInf
    simplTickFactor :: DynFlags -> Int
    simplPhases :: DynFlags -> Int
    safeInferred :: DynFlags -> Bool
    safeInfer :: DynFlags -> Bool
    safeHaskell :: DynFlags -> SafeHaskellMode
    ruleCheck :: DynFlags -> Maybe String
    rtsOptsSuggestions :: DynFlags -> Bool
    rtsOptsEnabled :: DynFlags -> RtsOptsEnabled
    rtsOpts :: DynFlags -> Maybe String
    rtldInfo :: DynFlags -> IORef (Maybe LinkerInfo)
    rtccInfo :: DynFlags -> IORef (Maybe CompilerInfo)
    reverseErrors :: DynFlags -> Bool
    refLevelHoleFits :: DynFlags -> Maybe Int
    reductionDepth :: DynFlags -> IntWithInf
    rawSettings :: DynFlags -> [(String, String)]
    profAuto :: DynFlags -> ProfAuto
    pprUserLength :: DynFlags -> Int
    pprCols :: DynFlags -> Int
    pluginPackageFlags :: DynFlags -> [PackageFlag]
    pluginModNames :: DynFlags -> [ModuleName]
    pluginModNameOpts :: DynFlags -> [(ModuleName, String)]
    platformMisc :: DynFlags -> PlatformMisc
    pkgTrustOnLoc :: DynFlags -> SrcSpan
    parMakeCount :: DynFlags -> Maybe Int
    packageFlags :: DynFlags -> [PackageFlag]
    packageEnv :: DynFlags -> Maybe String
    packageDBFlags :: DynFlags -> [PackageDBFlag]
    overlapInstLoc :: DynFlags -> SrcSpan
    outputHi :: DynFlags -> Maybe String
    outputFile_ :: DynFlags -> Maybe String
    optLevel :: DynFlags -> Int
    objectSuf_ :: DynFlags -> String
    objectDir :: DynFlags -> Maybe String
    nextWrapperNum :: DynFlags -> IORef (ModuleEnv Int)
    newDerivOnLoc :: DynFlags -> SrcSpan
    maxWorkerArgs :: DynFlags -> Int
    maxValidHoleFits :: DynFlags -> Maybe Int
    maxUncoveredPatterns :: DynFlags -> Int
    maxSimplIterations :: DynFlags -> Int
    maxRelevantBinds :: DynFlags -> Maybe Int
    maxRefHoleFits :: DynFlags -> Maybe Int
    maxPmCheckModels :: DynFlags -> Int
    maxInlineMemsetInsns :: DynFlags -> Int
    maxInlineMemcpyInsns :: DynFlags -> Int
    maxInlineAllocSize :: DynFlags -> Int
    maxErrors :: DynFlags -> Maybe Int
    mainModuleNameIs :: DynFlags -> ModuleName
    mainFunIs :: DynFlags -> Maybe String
    llvmConfig :: DynFlags -> LlvmConfig
    liftLamsRecArgs :: DynFlags -> Maybe Int
    liftLamsNonRecArgs :: DynFlags -> Maybe Int
    liftLamsKnown :: DynFlags -> Bool
    libraryPaths :: DynFlags -> [String]
    liberateCaseThreshold :: DynFlags -> Maybe Int
    ldInputs :: DynFlags -> [Option]
    language :: DynFlags -> Maybe Language
    interactivePrint :: DynFlags -> Maybe String
    inlineCheck :: DynFlags -> Maybe String
    initialUnique :: DynFlags -> Word
    incoherentOnLoc :: DynFlags -> SrcSpan
    includePaths :: DynFlags -> IncludeSpecs
    importPaths :: DynFlags -> [String]
    ignorePackageFlags :: DynFlags -> [IgnorePackageFlag]
    hpcDir :: DynFlags -> String
    homeUnitInstantiations_ :: DynFlags -> [(ModuleName, Module)]
    homeUnitInstanceOf_ :: DynFlags -> Maybe UnitId
    homeUnitId_ :: DynFlags -> UnitId
    historySize :: DynFlags -> Int
    hieSuf :: DynFlags -> String
    hieDir :: DynFlags -> Maybe String
    hiSuf_ :: DynFlags -> String
    hiDir :: DynFlags -> Maybe String
    hcSuf :: DynFlags -> String
    haddockOptions :: DynFlags -> Maybe String
    ghciScripts :: DynFlags -> [String]
    ghciHistSize :: DynFlags -> Int
    ghcVersionFile :: DynFlags -> Maybe String
    ghcNameVersion :: DynFlags -> GhcNameVersion
    ghcMode :: DynFlags -> GhcMode
    ghcLink :: DynFlags -> GhcLink
    ghcHeapSize :: DynFlags -> Maybe Int
    generalFlags :: DynFlags -> EnumSet GeneralFlag
    frontendPluginOpts :: DynFlags -> [String]
    frameworkPaths :: DynFlags -> [String]
    flushOut :: DynFlags -> FlushOut
    flushErr :: DynFlags -> FlushErr
    floatLamArgs :: DynFlags -> Maybe Int
    fileSettings :: DynFlags -> FileSettings
    fatalWarningFlags :: DynFlags -> EnumSet WarningFlag
    extensions :: DynFlags -> [OnOff Extension]
    extensionFlags :: DynFlags -> EnumSet Extension
    enableTimeStats :: DynFlags -> Bool
    dynamicTooFailed :: DynFlags -> IORef Bool
    dynamicNow :: DynFlags -> Bool
    dynOutputHi :: DynFlags -> Maybe String
    dynOutputFile_ :: DynFlags -> Maybe String
    dynObjectSuf_ :: DynFlags -> String
    dynLibLoader :: DynFlags -> DynLibLoader
    dynHiSuf_ :: DynFlags -> String
    dylibInstallName :: DynFlags -> Maybe String
    dumpPrefixForce :: DynFlags -> Maybe String
    dumpPrefix :: DynFlags -> Maybe String
    dumpFlags :: DynFlags -> EnumSet DumpFlag
    dumpDir :: DynFlags -> Maybe String
    deriveViaOnLoc :: DynFlags -> SrcSpan
    depSuffixes :: DynFlags -> [String]
    depMakefile :: DynFlags -> String
    depIncludePkgDeps :: DynFlags -> Bool
    depIncludeCppDeps :: DynFlags -> Bool
    depExcludeMods :: DynFlags -> [ModuleName]
    debugLevel :: DynFlags -> Int
    colScheme :: DynFlags -> Scheme
    cmmProcAlignment :: DynFlags -> Maybe Int
    cmdlineFrameworks :: DynFlags -> [String]
    cfgWeights :: DynFlags -> Weights
    canUseColor :: DynFlags -> Bool
    callerCcFilters :: DynFlags -> [CallerCcFilter]
    bmiVersion :: DynFlags -> Maybe BmiVersion
    binBlobThreshold :: DynFlags -> Word
    backend :: DynFlags -> Backend
    avx512pf :: DynFlags -> Bool
    avx512f :: DynFlags -> Bool
    avx512er :: DynFlags -> Bool
    avx512cd :: DynFlags -> Bool
    avx2 :: DynFlags -> Bool
    avx :: DynFlags -> Bool
    targetPlatform :: DynFlags -> Platform
    ..} BinHandle -> Name -> IO ()
    nameio =
          let
            -- See https://gitlab.haskell.org/ghc/ghc/issues/10923
            -- We used to fingerprint the optimisation level, but as Joachim
            -- Breitner pointed out in comment 9 on that ticket, it's better
            -- to ignore that and just look at the individual optimisation flags.
            opt_flags :: [Int]
    opt_flags = (GeneralFlag -> Int) -> [GeneralFlag] -> [Int]
    forall a b. (a -> b) -> [a] -> [b]
    map GeneralFlag -> Int
    forall a. Enum a => a -> Int
    fromEnum ([GeneralFlag] -> [Int]) -> [GeneralFlag] -> [Int]
    forall a b. (a -> b) -> a -> b
    $ (GeneralFlag -> Bool) -> [GeneralFlag] -> [GeneralFlag]
    forall a. (a -> Bool) -> [a] -> [a]
    filter (GeneralFlag -> EnumSet GeneralFlag -> Bool
    forall a. Enum a => a -> EnumSet a -> Bool
    `EnumSet.member` EnumSet GeneralFlag
    optimisationFlags)
                                              (EnumSet GeneralFlag -> [GeneralFlag]
    forall a. Enum a => EnumSet a -> [a]
    EnumSet.toList EnumSet GeneralFlag
    generalFlags)

          in (BinHandle -> Name -> IO ()) -> [Int] -> IO Fingerprint
    forall a.
    Binary a =>
    (BinHandle -> Name -> IO ()) -> a -> IO Fingerprint
    computeFingerprint BinHandle -> Name -> IO ()
    nameio [Int]
    opt_flags

    -- Fingerprint the HPC info. We keep this separate from the rest of
    -- the flags because GHCi users (especially) may wish to use an object
    -- file compiled for HPC when not actually using HPC.
    -- See Note [Ignoring some flag changes]
    fingerprintHpcFlags :: DynFlags
                          -> (BinHandle -> Name -> IO ())
                          -> IO Fingerprint
    fingerprintHpcFlags :: DynFlags -> (BinHandle -> Name -> IO ()) -> IO Fingerprint
    fingerprintHpcFlags dflags :: DynFlags
    dflags@DynFlags{Bool
    Int
    String
    [Int]
    [String]
    [(String, String)]
    [(ModuleName, String)]
    [(ModuleName, Module)]
    [ModuleName]
    [CallerCcFilter]
    [Option]
    [IgnorePackageFlag]
    [PackageDBFlag]
    [PackageFlag]
    [TrustFlag]
    [OnOff Extension]
    Maybe Int
    Maybe String
    Maybe (String, Int)
    Maybe UnitId
    Maybe BmiVersion
    Maybe SseVersion
    Maybe Language
    Word
    IORef Bool
    IORef (Maybe CompilerInfo)
    IORef (Maybe LinkerInfo)
    IORef (ModuleEnv Int)
    Ways
    UnfoldingOpts
    ModuleName
    EnumSet Extension
    EnumSet DumpFlag
    EnumSet GeneralFlag
    EnumSet WarningFlag
    UnitId
    OverridingBool
    Platform
    PlatformMisc
    Backend
    FileSettings
    GhcNameVersion
    ToolSettings
    Scheme
    Weights
    SrcSpan
    SafeHaskellMode
    IntWithInf
    DynLibLoader
    FlushErr
    FlushOut
    GhcLink
    GhcMode
    IncludeSpecs
    LlvmConfig
    ProfAuto
    RtsOptsEnabled
    cfgWeights :: Weights
    uniqueIncrement :: Int
    initialUnique :: Word
    maxErrors :: Maybe Int
    reverseErrors :: Bool
    maxInlineMemsetInsns :: Int
    maxInlineMemcpyInsns :: Int
    maxInlineAllocSize :: Int
    rtccInfo :: IORef (Maybe CompilerInfo)
    rtldInfo :: IORef (Maybe LinkerInfo)
    avx512pf :: Bool
    avx512f :: Bool
    avx512er :: Bool
    avx512cd :: Bool
    avx2 :: Bool
    avx :: Bool
    bmiVersion :: Maybe BmiVersion
    sseVersion :: Maybe SseVersion
    nextWrapperNum :: IORef (ModuleEnv Int)
    interactivePrint :: Maybe String
    callerCcFilters :: [CallerCcFilter]
    profAuto :: ProfAuto
    colScheme :: Scheme
    canUseColor :: Bool
    useColor :: OverridingBool
    useUnicode :: Bool
    pprCols :: Int
    pprUserLength :: Int
    ghciScripts :: [String]
    haddockOptions :: Maybe String
    ghcVersionFile :: Maybe String
    flushErr :: FlushErr
    flushOut :: FlushOut
    ghciHistSize :: Int
    maxWorkerArgs :: Int
    unfoldingOpts :: UnfoldingOpts
    extensionFlags :: EnumSet Extension
    extensions :: [OnOff Extension]
    trustworthyOnLoc :: SrcSpan
    warnUnsafeOnLoc :: SrcSpan
    warnSafeOnLoc :: SrcSpan
    pkgTrustOnLoc :: SrcSpan
    incoherentOnLoc :: SrcSpan
    overlapInstLoc :: SrcSpan
    deriveViaOnLoc :: SrcSpan
    newDerivOnLoc :: SrcSpan
    thOnLoc :: SrcSpan
    safeInferred :: Bool
    safeInfer :: Bool
    safeHaskell :: SafeHaskellMode
    language :: Maybe Language
    fatalWarningFlags :: EnumSet WarningFlag
    warningFlags :: EnumSet WarningFlag
    generalFlags :: EnumSet GeneralFlag
    dumpFlags :: EnumSet DumpFlag
    packageEnv :: Maybe String
    trustFlags :: [TrustFlag]
    pluginPackageFlags :: [PackageFlag]
    packageFlags :: [PackageFlag]
    ignorePackageFlags :: [IgnorePackageFlag]
    packageDBFlags :: [PackageDBFlag]
    depSuffixes :: [String]
    depExcludeMods :: [ModuleName]
    depIncludeCppDeps :: Bool
    depIncludePkgDeps :: Bool
    depMakefile :: String
    frontendPluginOpts :: [String]
    pluginModNameOpts :: [(ModuleName, String)]
    pluginModNames :: [ModuleName]
    hpcDir :: String
    rtsOptsSuggestions :: Bool
    rtsOptsEnabled :: RtsOptsEnabled
    rtsOpts :: Maybe String
    cmdlineFrameworks :: [String]
    frameworkPaths :: [String]
    libraryPaths :: [String]
    includePaths :: IncludeSpecs
    ldInputs :: [Option]
    dumpPrefixForce :: Maybe String
    dumpPrefix :: Maybe String
    dynamicNow :: Bool
    dynLibLoader :: DynLibLoader
    dynOutputHi :: Maybe String
    outputHi :: Maybe String
    dynOutputFile_ :: Maybe String
    outputFile_ :: Maybe String
    dynHiSuf_ :: String
    dynObjectSuf_ :: String
    dynamicTooFailed :: IORef Bool
    hieSuf :: String
    hiSuf_ :: String
    hcSuf :: String
    objectSuf_ :: String
    dumpDir :: Maybe String
    stubDir :: Maybe String
    hieDir :: Maybe String
    hiDir :: Maybe String
    dylibInstallName :: Maybe String
    objectDir :: Maybe String
    splitInfo :: Maybe (String, Int)
    targetWays_ :: Ways
    homeUnitInstantiations_ :: [(ModuleName, Module)]
    homeUnitInstanceOf_ :: Maybe UnitId
    homeUnitId_ :: UnitId
    solverIterations :: IntWithInf
    reductionDepth :: IntWithInf
    mainFunIs :: Maybe String
    mainModuleNameIs :: ModuleName
    importPaths :: [String]
    historySize :: Int
    cmmProcAlignment :: Maybe Int
    liftLamsKnown :: Bool
    liftLamsNonRecArgs :: Maybe Int
    liftLamsRecArgs :: Maybe Int
    floatLamArgs :: Maybe Int
    liberateCaseThreshold :: Maybe Int
    binBlobThreshold :: Word
    specConstrRecursive :: Int
    specConstrCount :: Maybe Int
    specConstrThreshold :: Maybe Int
    simplTickFactor :: Int
    maxPmCheckModels :: Int
    maxUncoveredPatterns :: Int
    refLevelHoleFits :: Maybe Int
    maxRefHoleFits :: Maybe Int
    maxValidHoleFits :: Maybe Int
    maxRelevantBinds :: Maybe Int
    ghcHeapSize :: Maybe Int
    enableTimeStats :: Bool
    parMakeCount :: Maybe Int
    strictnessBefore :: [Int]
    inlineCheck :: Maybe String
    ruleCheck :: Maybe String
    maxSimplIterations :: Int
    simplPhases :: Int
    debugLevel :: Int
    optLevel :: Int
    verbosity :: Int
    llvmConfig :: LlvmConfig
    rawSettings :: [(String, String)]
    platformMisc :: PlatformMisc
    toolSettings :: ToolSettings
    targetPlatform :: Platform
    fileSettings :: FileSettings
    ghcNameVersion :: GhcNameVersion
    backend :: Backend
    ghcLink :: GhcLink
    ghcMode :: GhcMode
    warningFlags :: DynFlags -> EnumSet WarningFlag
    warnUnsafeOnLoc :: DynFlags -> SrcSpan
    warnSafeOnLoc :: DynFlags -> SrcSpan
    verbosity :: DynFlags -> Int
    useUnicode :: DynFlags -> Bool
    useColor :: DynFlags -> OverridingBool
    uniqueIncrement :: DynFlags -> Int
    unfoldingOpts :: DynFlags -> UnfoldingOpts
    trustworthyOnLoc :: DynFlags -> SrcSpan
    trustFlags :: DynFlags -> [TrustFlag]
    toolSettings :: DynFlags -> ToolSettings
    thOnLoc :: DynFlags -> SrcSpan
    targetWays_ :: DynFlags -> Ways
    stubDir :: DynFlags -> Maybe String
    strictnessBefore :: DynFlags -> [Int]
    sseVersion :: DynFlags -> Maybe SseVersion
    splitInfo :: DynFlags -> Maybe (String, Int)
    specConstrThreshold :: DynFlags -> Maybe Int
    specConstrRecursive :: DynFlags -> Int
    specConstrCount :: DynFlags -> Maybe Int
    solverIterations :: DynFlags -> IntWithInf
    simplTickFactor :: DynFlags -> Int
    simplPhases :: DynFlags -> Int
    safeInferred :: DynFlags -> Bool
    safeInfer :: DynFlags -> Bool
    safeHaskell :: DynFlags -> SafeHaskellMode
    ruleCheck :: DynFlags -> Maybe String
    rtsOptsSuggestions :: DynFlags -> Bool
    rtsOptsEnabled :: DynFlags -> RtsOptsEnabled
    rtsOpts :: DynFlags -> Maybe String
    rtldInfo :: DynFlags -> IORef (Maybe LinkerInfo)
    rtccInfo :: DynFlags -> IORef (Maybe CompilerInfo)
    reverseErrors :: DynFlags -> Bool
    refLevelHoleFits :: DynFlags -> Maybe Int
    reductionDepth :: DynFlags -> IntWithInf
    rawSettings :: DynFlags -> [(String, String)]
    profAuto :: DynFlags -> ProfAuto
    pprUserLength :: DynFlags -> Int
    pprCols :: DynFlags -> Int
    pluginPackageFlags :: DynFlags -> [PackageFlag]
    pluginModNames :: DynFlags -> [ModuleName]
    pluginModNameOpts :: DynFlags -> [(ModuleName, String)]
    platformMisc :: DynFlags -> PlatformMisc
    pkgTrustOnLoc :: DynFlags -> SrcSpan
    parMakeCount :: DynFlags -> Maybe Int
    packageFlags :: DynFlags -> [PackageFlag]
    packageEnv :: DynFlags -> Maybe String
    packageDBFlags :: DynFlags -> [PackageDBFlag]
    overlapInstLoc :: DynFlags -> SrcSpan
    outputHi :: DynFlags -> Maybe String
    outputFile_ :: DynFlags -> Maybe String
    optLevel :: DynFlags -> Int
    objectSuf_ :: DynFlags -> String
    objectDir :: DynFlags -> Maybe String
    nextWrapperNum :: DynFlags -> IORef (ModuleEnv Int)
    newDerivOnLoc :: DynFlags -> SrcSpan
    maxWorkerArgs :: DynFlags -> Int
    maxValidHoleFits :: DynFlags -> Maybe Int
    maxUncoveredPatterns :: DynFlags -> Int
    maxSimplIterations :: DynFlags -> Int
    maxRelevantBinds :: DynFlags -> Maybe Int
    maxRefHoleFits :: DynFlags -> Maybe Int
    maxPmCheckModels :: DynFlags -> Int
    maxInlineMemsetInsns :: DynFlags -> Int
    maxInlineMemcpyInsns :: DynFlags -> Int
    maxInlineAllocSize :: DynFlags -> Int
    maxErrors :: DynFlags -> Maybe Int
    mainModuleNameIs :: DynFlags -> ModuleName
    mainFunIs :: DynFlags -> Maybe String
    llvmConfig :: DynFlags -> LlvmConfig
    liftLamsRecArgs :: DynFlags -> Maybe Int
    liftLamsNonRecArgs :: DynFlags -> Maybe Int
    liftLamsKnown :: DynFlags -> Bool
    libraryPaths :: DynFlags -> [String]
    liberateCaseThreshold :: DynFlags -> Maybe Int
    ldInputs :: DynFlags -> [Option]
    language :: DynFlags -> Maybe Language
    interactivePrint :: DynFlags -> Maybe String
    inlineCheck :: DynFlags -> Maybe String
    initialUnique :: DynFlags -> Word
    incoherentOnLoc :: DynFlags -> SrcSpan
    includePaths :: DynFlags -> IncludeSpecs
    importPaths :: DynFlags -> [String]
    ignorePackageFlags :: DynFlags -> [IgnorePackageFlag]
    hpcDir :: DynFlags -> String
    homeUnitInstantiations_ :: DynFlags -> [(ModuleName, Module)]
    homeUnitInstanceOf_ :: DynFlags -> Maybe UnitId
    homeUnitId_ :: DynFlags -> UnitId
    historySize :: DynFlags -> Int
    hieSuf :: DynFlags -> String
    hieDir :: DynFlags -> Maybe String
    hiSuf_ :: DynFlags -> String
    hiDir :: DynFlags -> Maybe String
    hcSuf :: DynFlags -> String
    haddockOptions :: DynFlags -> Maybe String
    ghciScripts :: DynFlags -> [String]
    ghciHistSize :: DynFlags -> Int
    ghcVersionFile :: DynFlags -> Maybe String
    ghcNameVersion :: DynFlags -> GhcNameVersion
    ghcMode :: DynFlags -> GhcMode
    ghcLink :: DynFlags -> GhcLink
    ghcHeapSize :: DynFlags -> Maybe Int
    generalFlags :: DynFlags -> EnumSet GeneralFlag
    frontendPluginOpts :: DynFlags -> [String]
    frameworkPaths :: DynFlags -> [String]
    flushOut :: DynFlags -> FlushOut
    flushErr :: DynFlags -> FlushErr
    floatLamArgs :: DynFlags -> Maybe Int
    fileSettings :: DynFlags -> FileSettings
    fatalWarningFlags :: DynFlags -> EnumSet WarningFlag
    extensions :: DynFlags -> [OnOff Extension]
    extensionFlags :: DynFlags -> EnumSet Extension
    enableTimeStats :: DynFlags -> Bool
    dynamicTooFailed :: DynFlags -> IORef Bool
    dynamicNow :: DynFlags -> Bool
    dynOutputHi :: DynFlags -> Maybe String
    dynOutputFile_ :: DynFlags -> Maybe String
    dynObjectSuf_ :: DynFlags -> String
    dynLibLoader :: DynFlags -> DynLibLoader
    dynHiSuf_ :: DynFlags -> String
    dylibInstallName :: DynFlags -> Maybe String
    dumpPrefixForce :: DynFlags -> Maybe String
    dumpPrefix :: DynFlags -> Maybe String
    dumpFlags :: DynFlags -> EnumSet DumpFlag
    dumpDir :: DynFlags -> Maybe String
    deriveViaOnLoc :: DynFlags -> SrcSpan
    depSuffixes :: DynFlags -> [String]
    depMakefile :: DynFlags -> String
    depIncludePkgDeps :: DynFlags -> Bool
    depIncludeCppDeps :: DynFlags -> Bool
    depExcludeMods :: DynFlags -> [ModuleName]
    debugLevel :: DynFlags -> Int
    colScheme :: DynFlags -> Scheme
    cmmProcAlignment :: DynFlags -> Maybe Int
    cmdlineFrameworks :: DynFlags -> [String]
    cfgWeights :: DynFlags -> Weights
    canUseColor :: DynFlags -> Bool
    callerCcFilters :: DynFlags -> [CallerCcFilter]
    bmiVersion :: DynFlags -> Maybe BmiVersion
    binBlobThreshold :: DynFlags -> Word
    backend :: DynFlags -> Backend
    avx512pf :: DynFlags -> Bool
    avx512f :: DynFlags -> Bool
    avx512er :: DynFlags -> Bool
    avx512cd :: DynFlags -> Bool
    avx2 :: DynFlags -> Bool
    avx :: DynFlags -> Bool
    targetPlatform :: DynFlags -> Platform
    ..} BinHandle -> Name -> IO ()
    nameio =
          let
            -- -fhpc, see https://gitlab.haskell.org/ghc/ghc/issues/11798
            -- hpcDir is output-only, so we should recompile if it changes
            hpc :: Maybe String
    hpc = if GeneralFlag -> DynFlags -> Bool
    gopt GeneralFlag
    Opt_Hpc DynFlags
    dflags then String -> Maybe String
    forall a. a -> Maybe a
    Just String
    hpcDir else Maybe String
    forall a. Maybe a
    Nothing

          in (BinHandle -> Name -> IO ()) -> Maybe String -> IO Fingerprint
    forall a.
    Binary a =>
    (BinHandle -> Name -> IO ()) -> a -> IO Fingerprint
    computeFingerprint BinHandle -> Name -> IO ()
    nameio Maybe String
    hpc

    {- Note [path flags and recompilation]

    There are several flags that we deliberately omit from the
    recompilation check; here we explain why.

    -osuf, -odir, -hisuf, -hidir
      If GHC decides that it does not need to recompile, then
      it must have found an up-to-date .hi file and .o file.
      There is no point recording these flags - the user must
      have passed the correct ones.  Indeed, the user may
      have compiled the source file in one-shot mode using
      -o to specify the .o file, and then loaded it in GHCi
      using -odir.

    -stubdir
      We omit this one because it is automatically set by -outputdir, and
      we don't want changes in -outputdir to automatically trigger
      recompilation.  This could be wrong, but only in very rare cases.

    -i (importPaths)
      For the same reason as -osuf etc. above: if GHC decides not to
      recompile, then it must have already checked all the .hi files on
      which the current module depends, so it must have found them
      successfully.  It is occasionally useful to be able to cd to a
      different directory and use -i flags to enable GHC to find the .hi
      files; we don't want this to force recompilation.

    The only path-related flag left is -hcsuf.
    -}

    {- Note [Ignoring some flag changes]
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Normally, --make tries to reuse only compilation products that are
    the same as those that would have been produced compiling from
    scratch. Sometimes, however, users would like to be more aggressive
    about recompilation avoidance. This is particularly likely when
    developing using GHCi (see #13604). Currently, we allow users to
    ignore optimisation changes using -fignore-optim-changes, and to
    ignore HPC option changes using -fignore-hpc-changes. If there's a
    demand for it, we could also allow changes to -fprof-auto-* flags
    (although we can't allow -prof flags to differ). The key thing about
    these options is that we can still successfully link a library or
    executable when some of its components differ in these ways.

    The way we accomplish this is to leave the optimization and HPC
    options out of the flag hash, hashing them separately.
    -}

    {- Note [Repeated -optP hashing]
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    We invoke fingerprintDynFlags for each compiled module to include
    the hash of relevant DynFlags in the resulting interface file.
    -optP (preprocessor) flags are part of that hash.
    -optP flags can come from multiple places:

      1. -optP flags directly passed on command line.
      2. -optP flags implied by other flags. Eg. -DPROFILING implied by -prof.
      3. -optP flags added with {-# OPTIONS -optP-D__F__ #-} in a file.

    When compiling many modules at once with many -optP command line arguments
    the work of hashing -optP flags would be repeated. This can get expensive
    and as noted on #14697 it can take 7% of time and 14% of allocations on
    a real codebase.

    The obvious solution is to cache the hash of -optP flags per GHC invocation.
    However, one has to be careful there, as the flags that were added in 3. way
    have to be accounted for.

    The current strategy is as follows:

      1. Lazily compute the hash of sOpt_p in sOpt_P_fingerprint whenever sOpt_p
         is modified. This serves dual purpose. It ensures correctness for when
         we add per file -optP flags and lets us save work for when we don't.
      2. When computing the fingerprint in fingerprintDynFlags use the cached
         value *and* fingerprint the additional implied (see 2. above) -optP flags.
         This is relatively cheap and saves the headache of fingerprinting all
         the -optP flags and tracking all the places that could invalidate the
         cache.
    -}