Provided by: ghc_7.4.1-1ubuntu2_amd64 bug


       GHC - the Glasgow Haskell Compiler


       ghc [option|filename]...
       ghci [option|filename]...


       This  manual  page documents briefly the ghc and ghci commands.  Note that ghci is not yet
       available on all architectures.  Extensive documentation is  available  in  various  other
       formats including DVI, PostScript and HTML; see below.

       Each  of  GHC's  command line options is classified as either static or dynamic.  A static
       flag may only be specified on the command line, whereas a dynamic flag may also  be  given
       in an OPTIONS pragma in a source file or set from the GHCi command-line with :set.

       As  a  rule of thumb, all the language options are dynamic, as are the warning options and
       the debugging options.

       The rest are static, with the notable exceptions of -v, -cpp, -fasm, -fvia-C, -fllvm,  and
       " -#include .  The OPTIONS sections lists the status of each flag.

       Common suffixes of file names for Haskell are:

       .hs    Haskell source code; preprocess, compile

       .lhs   literate Haskell source; unlit, preprocess, compile

       .hi    Interface file; contains information about exported symbols

       .hc    intermediate C files

       .x_o   way x object files; common ways are: p, u, s

       .x_hi  way x interface files


   Help and verbosity options
       -?  -help  -v  -vn  -V  --supported-extensions or --supported-languages  --info  --version
       --numeric-version  --print-libdir  -ferror-spans  -Hsize  -Rghc-timing

   Which phases to run
       -E  -C  -S  -c  -x suffix

   Alternative modes of operation
       --interactive  --make  -e expr  -M

   Redirecting output
       -hcsuf suffix  -hidir dir  -hisuf suffix  -o filename  -odir dir   -ohi  filename    -osuf
       suffix  -stubdir dir  -dumpdir dir  -outputdir dir

   Keeping intermediate files
       -keep-hc-file or
                        -keep-hc-files  -keep-llvm-file or
                        -keep-llvm-files  -keep-s-file or
                        -keep-s-files  -keep-tmp-files

   Temporary files

   Finding imports
       -idir1:dir2:...  -i

   Interface file options
       -ddump-hi  -ddump-hi-diffs  -ddump-minimal-imports  --show-iface file

   Recompilation checking
       -fforce-recomp -fno-force-recomp

   Interactive-mode options
       -ignore-dot-ghci          -ghci-script         -read-dot-ghci         -fbreak-on-exception
       -fno-break-on-exception   -fbreak-on-error   -fno-break-on-error    -fprint-evld-with-show
       -fno-print-evld-with-show             -fprint-bind-result           -fno-print-bind-result
       -fno-print-bind-contents  -fno-implicit-import-qualified

       -package-name P  -package P  -hide-all-packages  -hide-package name  -ignore-package  name
       -package-conf  file   -no-user-package-conf  -no-auto-link-packages  -trust P  -distrust P

   Language options
       -fglasgow-exts    -fno-glasgow-exts     -XOverlappingInstances    -XNoOverlappingInstances
       -XIncoherentInstances            -XNoIncoherentInstances            -XUndecidableInstances
       -XNoUndecidableInstances          -fcontext-stack=Nn           -XArrows         -XNoArrows
       -XDisambiguateRecordFields     -XNoDisambiguateRecordFields     -XForeignFunctionInterface
       -XNoForeignFunctionInterface  -XGenerics -XNoGenerics  -XImplicitParams -XNoImplicitParams
       -firrefutable-tuples    -fno-irrefutable-tuples    -XNoImplicitPrelude   -XImplicitPrelude
       -XRebindableSyntax            -XNoRebindableSyntax             -XNoMonomorphismRestriction
       -XMonomorphismRrestriction                -XNoNPlusKPatterns              -XNPlusKPatterns
       -XNoTraditionalRecordSyntax  -XTraditionalRecordSyntax   -XNoMonoPatBinds   -XMonoPatBinds
       -XRelaxedPolyRec   -XNoRelaxedPolyRec    -XExtendedDefaultRules   -XNoExtendedDefaultRules
       -XOverloadedStrings -XNoOverloadedStrings  -XGADTs -XNoGADTs  -XGADTSyntax  -XNoGADTSyntax
       -XTypeFamilies   -XNoTypeFamilies    -XConstraintKinds   -XNoConstraintKinds   -XDataKinds
       -XNoDataKinds  -XPolyKinds  -XNoPolyKinds   -XScopedTypeVariables  -XNoScopedTypeVariables
       -XMonoLocalBinds  -XNoMonoLocalBinds  -XTemplateHaskell -XNoTemplateHaskell  -XQuasiQuotes
       -XNoQuasiQuotes    -XBangPatterns   -XNoBangPatterns    -XCPP   -XNoCPP    -XPatternGuards
       -XNoPatternGuards    -XViewPatterns  -XNoViewPatterns   -XUnicodeSyntax  -XNoUnicodeSyntax
       -XMagicHash -XNoMagicHash   -XExplicitForAll  -XNoExplicitForAll   -XPolymorphicComponents
       -XNoPolymorphicComponents    -XRank2Types   -XNoRank2Types    -XRankNTypes  -XNoRankNTypes
       -XImpredicativeTypes          -XNoImpredicativeTypes           -XExistentialQuantification
       -XNoExistentialQuantification    -XKindSignatures   -XNoKindSignatures    -XEmptyDataDecls
       -XNoEmptyDataDecls     -XParallelListComp    -XNoParallelListComp      -XTransformListComp
       -XNoTransformListComp   -XMonadComprehensions  -XNoMonadComprehensions  -XUnliftedFFITypes
       -XNoUnliftedFFITypes    -XInterruptibleFFI   -XNoInterruptibleFFI    -XLiberalTypeSynonyms
       -XNoLiberalTypeSynonyms      -XTypeOperators    -XNoTypeOperators     -XDoRec    -XNoDoRec
       -XRecursiveDo  -XNoRecursiveDo   -XParallelArrays  -XNoParallelArrays    -XRecordWildCards
       -XNoRecordWildCards    -XNamedFieldPuns   -XNoNamedFieldPuns    -XDisambiguateRecordFields
       -XNoDisambiguateRecordFields   -XUnboxedTuples   -XNoUnboxedTuples    -XStandaloneDeriving
       -XNoStandaloneDeriving    -XDeriveDataTypeable   -XNoDeriveDataTypeable    -XDeriveGeneric
       -XNoDeriveGeneric        -XGeneralizedNewtypeDeriving       -XNoGeneralizedNewtypeDeriving
       -XTypeSynonymInstances  -XNoTypeSynonymInstances   -XFlexibleContexts -XNoFlexibleContexts
       -XFlexibleInstances            -XNoFlexibleInstances             -XConstrainedClassMethods
       -XNoConstrainedClassMethods            -XDefaultSignatures           -XNoDefaultSignatures
       -XMultiParamTypeClasses        -XNoMultiParamTypeClasses          -XFunctionalDependencies
       -XNoFunctionalDependencies   -XPackageImports  -XNoPackageImports   -XSafe   -XTrustworthy
       -XUnsafe  -fpackage-trust

       -W    -w     -w     -Wall    -w     -Werror       -Wwarn       -fwarn-unrecognised-pragmas
       -fno-warn-unrecognised-pragmas                                -fwarn-warnings-deprecations
       -fno-warn-warnings-deprecations     -fwarn-deprecated-flags     -fno-warn-deprecated-flags
       -fwarn-duplicate-exports          -fno-warn-duplicate-exports          -fwarn-hi-shadowing
       -fno-warn-hi-shadowing   -fwarn-identities  -fno-warn-identities   -fwarn-implicit-prelude
       -fno-warn-implicit-prelude     -fwarn-incomplete-patterns    -fno-warn-incomplete-patterns
       -fwarn-incomplete-uni-patterns                           -fno-warn-incomplete-uni-patterns
       -fwarn-incomplete-record-updates                       -fno-warn-incomplete-record-updates
       -fwarn-lazy-unlifted-bindings   -fno-warn-lazy-unlifted-bindings     -fwarn-missing-fields
       -fno-warn-missing-fields      -fwarn-missing-import-lists    -fnowarn-missing-import-lists
       -fwarn-missing-methods        -fno-warn-missing-methods          -fwarn-missing-signatures
       -fno-warn-missing-signatures     -fwarn-missing-local-sigs    -fno-warn-missing-local-sigs
       -fwarn-name-shadowing    -fno-warn-name-shadowing     -fwarn-orphans     -fno-warn-orphans
       -fwarn-overlapping-patterns   -fno-warn-overlapping-patterns   -fwarn-tabs  -fno-warn-tabs
       -fwarn-type-defaults       -fno-warn-type-defaults         -fwarn-monomorphism-restriction
       -fno-warn-monomorphism-restriction        -fwarn-unused-binds       -fno-warn-unused-binds
       -fwarn-unused-imports           -fno-warn-unused-imports             -fwarn-unused-matches
       -fno-warn-unused-matches           -fwarn-unused-do-bind          -fno-warn-unused-do-bind
       -fwarn-wrong-do-bind -fno-warn-wrong-do-bind  -fwarn-unsafe -fno-warn-unsafe   -fwarn-safe

   Optimisation levels
       -O -O0  -On -O0

   Individual optimisations
       -fcase-merge -fno-case-merge  -fcse   -fdicts-strict -fno-dicts-strict  -fdo-eta-reduction
       -fno-do-eta-reduction        -fdo-lambda-eta-expansion        -fno-do-lambda-eta-expansion
       -feager-blackholing   -fenable-rewrite-rules -fno-enable-rewrite-rules  -fexcess-precision
       -fno-excess-precision  -ffloat-in   -ffull-laziness   -fignore-asserts -fno-ignore-asserts
       -fignore-interface-pragmas          -fno-ignore-interface-pragmas          -fliberate-case
       -fliberate-case-threshold=n   -fno-liberate-case-threshold     -fmax-simplifier-iterations
       -fmax-worker-args        -fno-opt-coercion        -fno-pre-inlining        -fno-state-hack
       -fpedantic-bottoms             -fno-pedantic-bottoms              -fomit-interface-pragmas
       -fno-omit-interface-pragmas    -fsimplifier-phases   -fsimpl-tick-factor=n   -fspec-constr
       -fspec-constr-threshold=n        -fno-spec-constr-threshold          -fspec-constr-count=n
       -fno-spec-constr-count       -fspecialise        -fstrictness        -fstrictness=before=n
       -fstatic-argument-transformation       -funbox-strict-fields      -fno-unbox-strict-fields
       -funfolding-creation-threshold -fno-unfolding-creation-threshold  -funfolding-fun-discount
       -fno-unfolding-fun-discount    -funfolding-keeness-factor    -fno-unfolding-keeness-factor
       -funfolding-use-threshold -fno-unfolding-use-threshold

   Profiling options
       -prof   -fprof-auto  -fno-prof-auto   -fprof-auto-top -fno-prof-auto  -fprof-auto-exported
       -fno-prof-auto  -fprof-cafs -fno-prof-cafs   -fno-prof-count-entries  -fprof-count-entries

   Program coverage options
       -fhpc  -hpcdir dir

   Haskell pre-processor options

   C pre-processor options
       -cpp  -Dsymbol=value -U  -Usymbol  -Idir

   Code generation options
       -fasm   -fllvm   -fno-code  -fbyte-code  -fobject-code

   Linking options
       -shared   -fPIC   -dynamic   -dynload  -framework name  -framework-path name  -llib  -Ldir
       -main-is  --mk-dll  -no-hs-main   -rtsopts,  -rtsopts={none,some,all}   -with-rtsopts=opts
       -no-link    -split-objs    -static    -threaded    -debug    -eventlog   -fno-gen-manifest
       -fno-embed-manifest  -fno-shared-implib  -dylib-install-name path

   Plugin options
       -fplugin=module  -fplugin-opt=module:args

   Replacing phases
       -pgmL cmd  -pgmP cmd  -pgmc cmd  -pgms cmd  -pgma cmd  -pgml cmd  -pgmdll cmd   -pgmF  cmd
       -pgmwindres cmd

   Forcing options to particular phases
       -optL  option   -optP  option   -optF  option   -optc option  -optlo option  -optlc option
       -optm option  -opta option  -optl option  -optdll option  -optwindres option

   Platform-specific options
       -msse2  -monly-[432]-regs

   External core file options

   Compiler debugging options
       -dcore-lint   -ddump-to-file   -ddump-asm   -ddump-bcos    -ddump-cmm    -ddump-core-stats
       -ddump-cpranal    -ddump-cse    -ddump-deriv    -ddump-ds    -ddump-flatC   -ddump-foreign
       -ddump-hpc     -ddump-inlinings     -ddump-llvm      -ddump-occur-anal      -ddump-opt-cmm
       -ddump-parsed     -ddump-prep     -ddump-rn    -ddump-rule-firings    -ddump-rule-rewrites
       -ddump-rules   -ddump-vect   -ddump-simpl   -ddump-simpl-phases    -ddump-simpl-iterations
       -ddump-spec    -ddump-splices    -ddump-stg    -ddump-stranal    -ddump-tc    -ddump-types
       -ddump-worker-wrapper  -ddump-if-trace  -ddump-tc-trace  -ddump-vt-trace   -ddump-rn-trace
       -ddump-rn-stats    -ddump-simpl-stats    -dno-debug-output    -dppr-debug    -dppr-noprags
       -dppr-user-length  -dppr-colsNNN   -dppr-case-as-let   -dsuppress-all   -dsuppress-uniques
       -dsuppress-idinfo           -dsuppress-module-prefixes          -dsuppress-type-signatures
       -dsuppress-type-applications  -dsuppress-coercions  -dsource-stats  -dcmm-lint  -dstg-lint
       -dstg-stats  -dverbose-core2core  -dverbose-stg2stg  -dshow-passes  -dfaststring-stats

   Misc compiler options
       -fno-hi-version-check        -dno-black-holing       -fhistory-size       -funregisterised
       -fno-ghci-history  -fno-ghci-sandbox


       -?     help

       -help  help

       -v     verbose mode (equivalent to -v3)

       -vn    set verbosity level

       -V     display GHC version

       --supported-extensions or --supported-languages
              display the supported languages and language extensions

       --info display information about the compiler

              display GHC version

              display GHC version (numeric only)

              display GHC library directory

              output full span in error messages

       -Hsize Set the minimum heap size to size

              Summarise timing stats for GHC (same as +RTS -tstderr)


       -E     Stop after preprocessing (.hspp file)

       -C     Stop after generating C (.hc file)

       -S     Stop after generating assembly (.s file)

       -c     Do not link

       -x suffix
              Override default behaviour for source files


              Interactive mode - normally used by just running ghci; see for details.

       --make Build a multi-module Haskell  program,  automatically  figuring  out  dependencies.
              Likely to be much easier, and faster, than using make; see for details..

       -e expr
              Evaluate expr; see for details.

       -M     Generate dependency information suitable for use in a Makefile; see for details.


       -hcsuf suffix
              set the suffix to use for intermediate C files

       -hidir dir
              set directory for interface files

       -hisuf suffix
              set the suffix to use for interface files

       -o filename
              set output filename

       -odir dir
              set directory for object files

       -ohi filename
              set the filename in which to put the interface

       -osuf suffix
              set the output file suffix

       -stubdir dir
              redirect FFI stub files

       -dumpdir dir
              redirect dump files

       -outputdir dir
              set output directory


       -keep-hc-file or
                               -keep-hc-files retain intermediate .hc files

       -keep-llvm-file or
                               -keep-llvm-files retain intermediate LLVM .ll files

       -keep-s-file or
                               -keep-s-files retain intermediate .s files

              retain all intermediate temporary files


              set the directory for temporary files


              add dir, dir2, etc. to import path

       -i     Empty the import directory list


              Dump the new interface to stdout

              Show the differences vs. the old interface

              Dump a minimal set of imports

       --show-iface file
              See .


              Turn off recompilation checking; implied by any -ddump-X option


              Disable reading of .ghci files

              Load the given additional .ghci file

              Enable reading of .ghci files

              Break on any exception thrown

              Break on uncaught exceptions and errors

              Enable usage of Show instances in :print

              Turn on printing of binding results in GHCi

              Turn off printing of binding contents in GHCi

              Turn off implicit qualified import of everything in GHCi


       -package-name P
              Compile to be part of package P

       -package P
              Expose package P

              Hide all packages by default

       -hide-package name
              Hide package P

       -ignore-package name
              Ignore package P

       -package-conf file
              Load more packages from file

              Don't load the user's package config file.

              Don't automatically link in the haskell98 package.

       -trust P
              Expose package P and set it to be trusted

       -distrust P
              Expose package P and set it to be distrusted

              Distrust all packages by default


              Enable most language extensions; see for exactly which ones.

              Enable overlapping instances

              Enable incoherent instances. Implies -XOverlappingInstances

              Enable undecidable instances

              set the limit for context reduction. Default is 20.

              Enable arrow notation extension

              Enable record field disambiguation

              Enable foreign function interface (implied by -fglasgow-exts)

              Deprecated, does nothing. No longer enables generic classes. See also GHC's support
              for generic programming.

              Enable Implicit Parameters. Implied by -fglasgow-exts.

              Make tuple pattern matching irrefutable

              Don't implicitly import Prelude

              Employ rebindable syntax

              Disable the monomorphism restriction

              Disable support for n+k patterns

              Disable support for traditional record syntax (as supported by Haskell 98) C  {f  =

              Make pattern bindings polymorphic

              Relaxed checking for mutually-recursive polymorphic functions

              Use GHCi's extended default rules in a normal module

              Enable overloaded string literals.

              Enable generalised algebraic data types.

              Enable generalised algebraic data type syntax.

              Enable type families.

              Enable a kind of constraints.

              Enable datatype promotion.

              Enable kind polymorphism.

              Enable lexically-scoped type variables. Implied by -fglasgow-exts.

              Enable do not generalise local bindings.

              Enable Template Haskell. No longer implied by -fglasgow-exts.

              Enable quasiquotation.

              Enable bang patterns.

       -XCPP  Enable the C preprocessor.

              Enable pattern guards.

              Enable view patterns.

              Enable unicode syntax.

              Allow "#" as a postfix modifier on identifiers.

              Enable   explicit   universal  quantification.  Implied  by  -XScopedTypeVariables,
              -XLiberalTypeSynonyms,   -XRank2Types,    -XRankNTypes,    -XPolymorphicComponents,

              Enable polymorphic components for data constructors.

              Enable rank-2 types.

              Enable rank-N types.

              Enable impredicative types.

              Enable existential quantification.

              Enable kind signatures.

              Enable empty data declarations.

              Enable parallel list comprehensions.

              Enable generalised list comprehensions.

              Enable monad comprehensions.

              Enable unlifted FFI types.

              Enable interruptible FFI.

              Enable liberalised type synonyms.

              Enable type operators.

              Enable recursive do notation.

              Enable  recursive  do  (mdo)  notation. This is deprecated; please use recursive do
              notation instead.

              Enable parallel arrays.

              Enable record wildcards.

              Enable record puns.

              Enable record field disambiguation.

              Enable unboxed tuples.

              Enable standalone deriving.

              Enable deriving for the Data and Typeable classes.

              Enable deriving for the Generic class.

              Enable newtype deriving.

              Enable type synonyms in instance heads.

              Enable flexible contexts.

              Enable flexible instances. Implies -XTypeSynonymInstances

              Enable constrained class methods.

              Enable default signatures.

              Enable multi parameter type classes.

              Enable functional dependencies.

              Enable package-qualified imports.

       -XSafe Enable the Safe Haskell Safe mode.

              Enable the Safe Haskell Trustworthy mode.

              Enable Safe Haskell Unsafe mode.

              Enable Safe Haskell trusted package requirement for trustworty modules.


       -W     enable normal warnings

       -w     disable all warnings

       -Wall  enable almost all warnings (details in )

              make warnings fatal

       -Wwarn make warnings non-fatal

              warn about uses of pragmas that GHC doesn't recognise

              warn about uses of functions & types that have warnings or deprecated pragmas

              warn about uses of commandline flags that are deprecated

              warn when an entity is exported multiple times

              warn when a .hi file in the current directory shadows a library

              warn about uses of Prelude numeric conversions that are probably the identity  (and
              hence could be omitted)

              warn when the Prelude is implicitly imported

              warn when a pattern match could fail

              warn when a pattern match in a lambda expression or pattern binding could fail

              warn when a record update could fail

              warn when a pattern binding looks lazy but must be strict

              warn when fields of a record are uninitialised

              warn when an import declaration does not explicitly list all the names brought into

              warn when class methods are undefined

              warn about top-level functions without signatures

              warn about polymorphic local bindings without signatures

              warn when names are shadowed

              warn when the module contains orphan instance declarations or rewrite rules

              warn about overlapping patterns

              warn if there are tabs in the source file

              warn when defaulting happens

              warn when the Monomorphism Restriction is applied

              warn about bindings that are unused

              warn about unnecessary imports

              warn about variables in patterns that aren't used

              warn about do bindings that appear to throw away values of types other than ()

              warn about do bindings that appear to throw away monadic  values  that  you  should
              have bound instead

              warn if the module being compiled is regarded to be unsafe. Should be used to check
              the safety status of modules when using safe inference.

              warn if the module being compiled is regarded to be safe. Should be used  to  check
              the safety status of modules when using safe inference.


       -O     Enable default optimisation (level 1)

       -On    Set optimisation level n


              Enable case-merging. Implied by -O.

       -fcse  Turn on common sub-expression elimination. Implied by -O.

              Make dictionaries strict

              Enable eta-reduction. Implied by -O.

              Enable lambda eta-reduction

              Turn on eager blackholing

              Switch  on all rewrite rules (including rules generated by automatic specialisation
              of overloaded functions). Implied by -O.

              Enable excess intermediate precision

              Turn on the float-in transformation. Implied by -O.

              Turn on full laziness (floating bindings outwards). Implied by -O.

              Ignore assertions in the source

              Ignore pragmas in interface files

              Turn on the liberate-case transformation. Implied by -O2.

              Set the size threshold for the liberate-case transformation to n (default: 200)

              Set the max iterations for the simplifier

              If a worker has that many arguments, none will be unpacked anymore (default: 10)

              Turn off the coercion optimiser

              Turn off pre-inlining

              Turn off the "state hack" whereby any lambda  with  a  real-world  state  token  as
              argument is considered to be single-entry. Hence OK to inline things inside it.

              Make   GHC   be   more  precise  about  its  treatment  of  bottom  (but  see  also
              -fno-state-hack). In particular, GHC will not eta-expand through a case expression.

              Don't generate interface pragmas

              Set the number of phases for the simplifier (default 2). Ignored with -O0.

              Set the percentage factor for simplifier ticks (default 100)

              Turn on the SpecConstr transformation. Implied by -O2.

              Set the size threshold for the SpecConstr transformation to n (default: 200)

              Set to n (default: 3) the maximum number of specialisations that  will  be  created
              for any one function by the SpecConstr transformation

              Turn on specialisation of overloaded functions. Implied by -O.

              Turn on strictness analysis. Implied by -O.

              Run an additional strictness analysis before simplifier phase n

              Turn on the static argument transformation. Implied by -O2.

              Flatten strict constructor fields

              Tweak unfolding settings

              Tweak unfolding settings

              Tweak unfolding settings

              Tweak unfolding settings


       -prof  Turn on profiling

              Auto-add SCCs to all bindings not marked INLINE

              Auto-add SCCs to all top-level bindings not marked INLINE

              Auto-add SCCs to all exported bindings not marked INLINE

              Auto-add SCCs to all CAFs

              Do not collect entry counts

       -ticky Turn on ticky-ticky profiling


       -fhpc  Turn on Haskell program coverage instrumentation

       -hpcdir dir
              Directory to deposit .mix files during compilation (default is .hpc)


       -F     Enable the use of a pre-processor (set with -pgmF)


       -cpp   Run the C pre-processor on Haskell source files

              Define a symbol in the C pre-processor

              Undefine a symbol in the C pre-processor

       -Idir  Add dir to the directory search list for #include files


       -fasm  Use the native code generator

       -fllvm Compile using the LLVM code generator

              Omit code generation

              Generate byte-code

              Generate object code


              Generate a shared library (as opposed to an executable)

       -fPIC  Generate position-independent code (where available)

              Use dynamic Haskell libraries (if available)

              Selects one of a number of modes for finding shared libraries at runtime.

       -framework name
              On  Darwin/MacOS X only, link in the framework name. This option corresponds to the
              -framework option for Apple's Linker.

       -framework-path name
              On Darwin/MacOS X only, add dir to the list of directories searched for frameworks.
              This option corresponds to the -F option for Apple's Linker.

       -llib  Link in library lib

       -Ldir  Add dir to the list of directories searched for libraries

              Set main module and function

              DLL-creation mode (Windows only)

              Don't assume this program contains main

       -rtsopts, -rtsopts={none,some,all}
              Control  whether  the  RTS  behaviour can be tweaked via command-line flags and the
              GHCRTS environment variable. Using none means no RTS flags can be given; some means
              only  a minimum of safe options can be given (the default), and all (or no argument
              at all) means that all RTS flags are permitted.

              Set the default RTS options to opts.

              Omit linking

              Split objects (for libraries)

              Use static Haskell libraries

              Use the threaded runtime

       -debug Use the debugging runtime

              Enable runtime event tracing

              Do not generate a manifest file (Windows only)

              Do not embed the manifest in the executable (Windows only)

              Don't generate an import library for a DLL (Windows only)

       -dylib-install-name path
              Set the install name (via -install_name passed to Apple's linker),  specifying  the
              full  install path of the library file. Any libraries or executables that link with
              it later will  pick  up  that  path  as  their  runtime  search  location  for  it.
              (Darwin/MacOS X only)


              Load a plugin exported by a given module

              Give arguments to a plugin module; module must be specified with -fplugin


       -pgmL cmd
              Use cmd as the literate pre-processor

       -pgmP cmd
              Use cmd as the C pre-processor (with -cpp only)

       -pgmc cmd
              Use cmd as the C compiler

       -pgms cmd
              Use cmd as the splitter

       -pgma cmd
              Use cmd as the assembler

       -pgml cmd
              Use cmd as the linker

       -pgmdll cmd
              Use cmd as the DLL generator

       -pgmF cmd
              Use cmd as the pre-processor (with -F only)

       -pgmwindres cmd
              Use cmd as the program for embedding manifests on Windows.


       -optL option
              pass option to the literate pre-processor

       -optP option
              pass option to cpp (with -cpp only)

       -optF option
              pass option to the custom pre-processor

       -optc option
              pass option to the C compiler

       -optlo option
              pass option to the LLVM optimiser

       -optlc option
              pass option to the LLVM compiler

       -optm option
              pass option to the mangler

       -opta option
              pass option to the assembler

       -optl option
              pass option to the linker

       -optdll option
              pass option to the DLL generator

       -optwindres option
              pass option to windres.


       -msse2 (x86 only) Use SSE2 for floating point

              (x86 only) give some registers back to the C compiler


              Generate .hcr external Core files


              Turn on internal sanity checking

              Dump to files instead of stdout

              Dump assembly

              Dump interpreter byte code

              Dump C-- output

              Print  a  one-line  summary  of  the  size  of  the  Core program at the end of the
              optimisation pipeline

              Dump output from CPR analysis

              Dump CSE output

              Dump deriving output

              Dump desugarer output

              Dump `flat' C

              Dump foreign export stubs

              Dump after instrumentation for program coverage

              Dump inlining info

              Dump LLVM intermediate code

              Dump occurrence analysis output

              Dump the results of C-- to C-- optimising passes

              Dump parse tree

              Dump prepared core

              Dump renamer output

              Dump rule firing info

              Dump detailed rule firing info

              Dump rules

              Dump vectoriser input and output

              Dump final simplifier output

              Dump output from each simplifier phase

              Dump output from each simplifier iteration

              Dump specialiser output

              Dump TH spliced expressions, and what they evaluate to

              Dump final STG

              Dump strictness analyser output

              Dump typechecker output

              Dump type signatures

              Dump worker-wrapper output

              Trace interface files

              Trace typechecker

              Trace vectoriser

              Trace renamer

              Renamer stats

              Dump simplifier stats

              Suppress unsolicited debugging output

              Turn on debug printing (more verbose)

              Don't output pragma info in dumps

              Set the depth for printing expressions in error msgs

              Set the width of debugging output. For example -dppr-cols200

              Print single alternative case expressions as strict lets.

              In core dumps, suppress everything that is suppressable.

              Suppress the printing of uniques in debug output (easier to use diff)

              Suppress extended information about identifiers where they are bound

              Suppress the printing of module qualification prefixes

              Suppress type signatures

              Suppress type applications

              Suppress the printing of coercions in Core dumps to make them shorter

              Dump haskell source stats

              C-- pass sanity checking

              STG pass sanity checking

              Dump STG stats

              Show output from each core-to-core pass

              Show output from each STG-to-STG pass

              Print out each pass name as it happens

              Show statistics for fast string usage when finished


              Don't complain about .hi file mismatches

              Turn off black holing (probably doesn't work)

              Set simplification history size

              Unregisterised compilation (use -unreg instead)

              Do not use the load/store the GHCi command history from/to ghci_history.

              Turn off the GHCi sandbox. Means computations are run in the  main  thread,  rather
              than a forked thread.




       Copyright 2002, The University Court of the University of Glasgow.
       All rights reserved.


       This  manual page was generated from the XML documentation of GHC with blood, sweat, tears
       and a breaks-if-you-look-at-it-the-wrong-way XSL stylesheet originally written by  Michael
       Weber <> for the Debian GNU/Linux system (but may be used by others).