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<?xml version="1.0" encoding="iso-8859-1"?>
<sect1 id="flag-reference">
<title>Flag reference</title>
<para>This section is a quick-reference for GHC's command-line
flags. For each flag, we also list its static/dynamic status (see
<xref linkend="static-dynamic-flags"/>), and the flag's opposite
(if available).</para>
<sect2>
<title>Help and verbosity options</title>
<para><xref linkend="options-help"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-?</option></entry>
<entry>help</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-help</option></entry>
<entry>help</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-v</option></entry>
<entry>verbose mode (equivalent to <option>-v3</option>)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-v</option><replaceable>n</replaceable></entry>
<entry>set verbosity level</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-V</option></entry>
<entry>display GHC version</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>&ndash;&ndash;supported-extensions</option> or <option>&ndash;&ndash;supported-languages</option></entry>
<entry>display the supported languages and language extensions</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>&ndash;&ndash;info</option></entry>
<entry>display information about the compiler</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>&ndash;&ndash;version</option></entry>
<entry>display GHC version</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>&ndash;&ndash;numeric-version</option></entry>
<entry>display GHC version (numeric only)</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>&ndash;&ndash;print-libdir</option></entry>
<entry>display GHC library directory</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ferror-spans</option></entry>
<entry>output full span in error messages</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-H</option><replaceable>size</replaceable></entry>
<entry>Set the minimum heap size to <replaceable>size</replaceable></entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-Rghc-timing</option></entry>
<entry>Summarise timing stats for GHC (same as <literal>+RTS -tstderr</literal>)</entry>
<entry>static</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Which phases to run</title>
<para><xref linkend="options-order"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-E</option></entry>
<entry>Stop after preprocessing (<literal>.hspp</literal> file)</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-C</option></entry>
<entry>Stop after generating C (<literal>.hc</literal> file)</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-S</option></entry>
<entry>Stop after generating assembly (<literal>.s</literal> file)</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-c</option></entry>
<entry>Do not link</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-x</option> <replaceable>suffix</replaceable></entry>
<entry>Override default behaviour for source files</entry>
<entry>static</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Alternative modes of operation</title>
<para><xref linkend="modes"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>--interactive</option></entry>
<entry>Interactive mode - normally used by just running <command>ghci</command>;
see <xref linkend="ghci"/> for details.</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>--make</option></entry>
<entry>Build a multi-module Haskell program, automatically figuring out dependencies. Likely to be much easier, and faster, than using <command>make</command>;
see <xref linkend="make-mode"/> for details..</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-e <replaceable>expr</replaceable></option></entry>
<entry>Evaluate <replaceable>expr</replaceable>;
see <xref linkend="eval-mode"/> for details.</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-M</option></entry>
<entry>Generate dependency information suitable for use in a <filename>Makefile</filename>;
see <xref linkend="makefile-dependencies"/> for details.</entry>
<entry>mode</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Redirecting output</title>
<para><xref linkend="options-output"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-hcsuf</option> <replaceable>suffix</replaceable></entry>
<entry>set the suffix to use for intermediate C files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-hidir</option> <replaceable>dir</replaceable></entry>
<entry>set directory for interface files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-hisuf</option> <replaceable>suffix</replaceable></entry>
<entry>set the suffix to use for interface files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-o</option> <replaceable>filename</replaceable></entry>
<entry>set output filename</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-odir</option> <replaceable>dir</replaceable></entry>
<entry>set directory for object files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ohi</option> <replaceable>filename</replaceable></entry>
<entry>set the filename in which to put the interface</entry>
<entry>dynamic</entry>
<entry></entry>
</row>
<row>
<entry><option>-osuf</option> <replaceable>suffix</replaceable></entry>
<entry>set the output file suffix</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-stubdir</option> <replaceable>dir</replaceable></entry>
<entry>redirect FFI stub files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dumpdir</option> <replaceable>dir</replaceable></entry>
<entry>redirect dump files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-outputdir</option> <replaceable>dir</replaceable></entry>
<entry>set output directory</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Keeping intermediate files</title>
<para><xref linkend="keeping-intermediates"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-keep-hc-file</option> or
<option>-keep-hc-files</option></entry>
<entry>retain intermediate <literal>.hc</literal> files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-keep-llvm-file</option> or
<option>-keep-llvm-files</option></entry>
<entry>retain intermediate LLVM <literal>.ll</literal> files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-keep-s-file</option> or
<option>-keep-s-files</option></entry>
<entry>retain intermediate <literal>.s</literal> files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-keep-tmp-files</option></entry>
<entry>retain all intermediate temporary files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Temporary files</title>
<para><xref linkend="temp-files"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-tmpdir</option></entry>
<entry>set the directory for temporary files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Finding imports</title>
<para><xref linkend="search-path"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-i</option><replaceable>dir1</replaceable>:<replaceable>dir2</replaceable>:...</entry>
<entry>add <replaceable>dir</replaceable>,
<replaceable>dir2</replaceable>, etc. to import path</entry>
<entry>static/<literal>:set</literal></entry>
<entry>-</entry>
</row>
<row>
<entry><option>-i</option></entry>
<entry>Empty the import directory list</entry>
<entry>static/<literal>:set</literal></entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Interface file options</title>
<para><xref linkend="hi-options"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-ddump-hi</option></entry>
<entry>Dump the new interface to stdout</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-hi-diffs</option></entry>
<entry>Show the differences vs. the old interface</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-minimal-imports</option></entry>
<entry>Dump a minimal set of imports</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>--show-iface</option> <replaceable>file</replaceable></entry>
<entry>See <xref linkend="modes"/>.</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Recompilation checking</title>
<para><xref linkend="recomp"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-fforce-recomp</option></entry>
<entry>Turn off recompilation checking. This is implied by any
<option>-ddump-X</option> option when compiling a single
file (i.e. when using <literal>-c</literal>).</entry>
<entry>dynamic</entry>
<entry><option>-fno-force-recomp</option></entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2 id="interactive-mode-options">
<title>Interactive-mode options</title>
<para><xref linkend="ghci-dot-files"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-ignore-dot-ghci</option></entry>
<entry>Disable reading of <filename>.ghci</filename> files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ghci-script</option></entry>
<entry>Read additional <filename>.ghci</filename> files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fbreak-on-exception</option></entry>
<entry><link linkend="ghci-debugger-exceptions">Break on any exception thrown</link></entry>
<entry>dynamic</entry>
<entry><option>-fno-break-on-exception</option></entry>
</row>
<row>
<entry><option>-fbreak-on-error</option></entry>
<entry><link linkend="ghci-debugger-exceptions">Break on uncaught exceptions and errors</link></entry>
<entry>dynamic</entry>
<entry><option>-fno-break-on-error</option></entry>
</row>
<row>
<entry><option>-fghci-hist-size=<replaceable>n</replaceable></option></entry>
<entry><link linkend="ghci-debugger">Set the number of entries GHCi keeps for <literal>:history</literal></link></entry>
<entry>dynamic</entry>
<entry><option>(default is 50)</option></entry>
</row>
<row>
<entry><option>-fprint-evld-with-show</option></entry>
<entry><link linkend="breakpoints">Enable usage of Show instances in <literal>:print</literal></link></entry>
<entry>dynamic</entry>
<entry><option>-fno-print-evld-with-show</option></entry>
</row>
<row>
<entry><option>-fprint-bind-result</option></entry>
<entry><link linkend="ghci-stmts">Turn on printing of binding results in GHCi</link></entry>
<entry>dynamic</entry>
<entry><option>-fno-print-bind-result</option></entry>
</row>
<row>
<entry><option>-fno-print-bind-contents</option></entry>
<entry><link linkend="breakpoints">Turn off printing of binding contents in GHCi</link></entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fno-implicit-import-qualified</option></entry>
<entry><link linkend="ghci-import-qualified">Turn off
implicit qualified import of everything in GHCi</link></entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-interactive-print</option></entry>
<entry><link linkend="ghci-interactive-print">Select the function
to use for printing evaluated expressions in GHCi</link></entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Packages</title>
<para><xref linkend="packages"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-package-name</option> <replaceable>P</replaceable></entry>
<entry>Compile to be part of package <replaceable>P</replaceable></entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-package</option> <replaceable>P</replaceable></entry>
<entry>Expose package <replaceable>P</replaceable></entry>
<entry>static/<literal>:set</literal></entry>
<entry>-</entry>
</row>
<row>
<entry><option>-hide-all-packages</option></entry>
<entry>Hide all packages by default</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-hide-package</option> <replaceable>name</replaceable></entry>
<entry>Hide package <replaceable>P</replaceable></entry>
<entry>static/<literal>:set</literal></entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ignore-package</option> <replaceable>name</replaceable></entry>
<entry>Ignore package <replaceable>P</replaceable></entry>
<entry>static/<literal>:set</literal></entry>
<entry>-</entry>
</row>
<row>
<entry><option>-package-db</option> <replaceable>file</replaceable></entry>
<entry>Add <replaceable>file</replaceable> to the package db stack.</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-clear-package-db</option></entry>
<entry>Clear the package db stack.</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-no-global-package-db</option></entry>
<entry>Remove the global package db from the stack.</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-global-package-db</option></entry>
<entry>Add the global package db to the stack.</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-no-user-package-db</option></entry>
<entry>Remove the user's package db from the stack.</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-user-package-db</option></entry>
<entry>Add the user's package db to the stack.</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-no-auto-link-packages</option></entry>
<entry>Don't automatically link in the base and rts packages.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-trust</option> <replaceable>P</replaceable></entry>
<entry>Expose package <replaceable>P</replaceable> and set it to be
trusted</entry>
<entry>static/<literal>:set</literal></entry>
<entry>-</entry>
</row>
<row>
<entry><option>-distrust</option> <replaceable>P</replaceable></entry>
<entry>Expose package <replaceable>P</replaceable> and set it to be
distrusted</entry>
<entry>static/<literal>:set</literal></entry>
<entry>-</entry>
</row>
<row>
<entry><option>-distrust-all</option> </entry>
<entry>Distrust all packages by default</entry>
<entry>static/<literal>:set</literal></entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Language options</title>
<para>Language options can be enabled either by a command-line option
<option>-Xblah</option>, or by a <literal>{-# LANGUAGE blah #-}</literal>
pragma in the file itself. See <xref linkend="options-language"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-fglasgow-exts</option></entry>
<entry>Enable most language extensions; see <xref linkend="options-language"/> for exactly which ones.</entry>
<entry>dynamic</entry>
<entry><option>-fno-glasgow-exts</option></entry>
</row>
<row>
<entry><option>-XOverlappingInstances</option></entry>
<entry>Enable <link linkend="instance-overlap">overlapping instances</link></entry>
<entry>dynamic</entry>
<entry><option>-XNoOverlappingInstances</option></entry>
</row>
<row>
<entry><option>-XIncoherentInstances</option></entry>
<entry>Enable <link linkend="instance-overlap">incoherent instances</link>.
Implies <option>-XOverlappingInstances</option> </entry>
<entry>dynamic</entry>
<entry><option>-XNoIncoherentInstances</option></entry>
</row>
<row>
<entry><option>-XUndecidableInstances</option></entry>
<entry>Enable <link linkend="undecidable-instances">undecidable instances</link></entry>
<entry>dynamic</entry>
<entry><option>-XNoUndecidableInstances</option></entry>
</row>
<row>
<entry><option>-fcontext-stack=N</option><replaceable>n</replaceable></entry>
<entry>set the <link linkend="undecidable-instances">limit for context reduction</link>. Default is 20.</entry>
<entry>dynamic</entry>
<entry></entry>
</row>
<row>
<entry><option>-XArrows</option></entry>
<entry>Enable <link linkend="arrow-notation">arrow
notation</link> extension</entry>
<entry>dynamic</entry>
<entry><option>-XNoArrows</option></entry>
</row>
<row>
<entry><option>-XDisambiguateRecordFields</option></entry>
<entry>Enable <link linkend="disambiguate-fields">record
field disambiguation</link></entry>
<entry>dynamic</entry>
<entry><option>-XNoDisambiguateRecordFields</option></entry>
</row>
<row>
<entry><option>-XForeignFunctionInterface</option></entry>
<entry>Enable <link linkend="ffi">foreign function interface</link> (implied by
<option>-fglasgow-exts</option>)</entry>
<entry>dynamic</entry>
<entry><option>-XNoForeignFunctionInterface</option></entry>
</row>
<row>
<entry><option>-XGenerics</option></entry>
<entry>Deprecated, does nothing. No longer enables <link linkend="generic-classes">generic classes</link>.
See also GHC's support for
<link linkend="generic-programming">generic programming</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoGenerics</option></entry>
</row>
<row>
<entry><option>-XImplicitParams</option></entry>
<entry>Enable <link linkend="implicit-parameters">Implicit Parameters</link>.
Implied by <option>-fglasgow-exts</option>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoImplicitParams</option></entry>
</row>
<row>
<entry><option>-firrefutable-tuples</option></entry>
<entry>Make tuple pattern matching irrefutable</entry>
<entry>dynamic</entry>
<entry><option>-fno-irrefutable-tuples</option></entry>
</row>
<row>
<entry><option>-XNoImplicitPrelude</option></entry>
<entry>Don't implicitly <literal>import Prelude</literal></entry>
<entry>dynamic</entry>
<entry><option>-XImplicitPrelude</option></entry>
</row>
<row>
<entry><option>-XRebindableSyntax</option></entry>
<entry>Employ <link linkend="rebindable-syntax">rebindable syntax</link></entry>
<entry>dynamic</entry>
<entry><option>-XNoRebindableSyntax</option></entry>
</row>
<row>
<entry><option>-XNoMonomorphismRestriction</option></entry>
<entry>Disable the <link linkend="monomorphism">monomorphism restriction</link></entry>
<entry>dynamic</entry>
<entry><option>-XMonomorphismRrestriction</option></entry>
</row>
<row>
<entry><option>-XNoNPlusKPatterns</option></entry>
<entry>Disable support for <literal>n+k</literal> patterns</entry>
<entry>dynamic</entry>
<entry><option>-XNPlusKPatterns</option></entry>
</row>
<row>
<entry><option>-XNoTraditionalRecordSyntax</option></entry>
<entry>Disable support for traditional record syntax (as supported by Haskell 98) <literal>C {f = x}</literal></entry>
<entry>dynamic</entry>
<entry><option>-XTraditionalRecordSyntax</option></entry>
</row>
<row>
<entry><option>-XRelaxedPolyRec</option></entry>
<entry>Relaxed checking for <link linkend="typing-binds">mutually-recursive polymorphic functions</link></entry>
<entry>dynamic</entry>
<entry><option>-XNoRelaxedPolyRec</option></entry>
</row>
<row>
<entry><option>-XExtendedDefaultRules</option></entry>
<entry>Use GHCi's <link linkend="extended-default-rules">extended default rules</link> in a normal module</entry>
<entry>dynamic</entry>
<entry><option>-XNoExtendedDefaultRules</option></entry>
</row>
<row>
<entry><option>-XOverloadedStrings</option></entry>
<entry>Enable <link linkend="overloaded-strings">overloaded string literals</link>.
</entry>
<entry>dynamic</entry>
<entry><option>-XNoOverloadedStrings</option></entry>
</row>
<row>
<entry><option>-XOverloadedLists</option></entry>
<entry>Enable <link linkend="overloaded-lists">overloaded lists</link>.
</entry>
<entry>dynamic</entry>
<entry><option>-XNoOverloadedLists</option></entry>
</row>
<row>
<entry><option>-XGADTs</option></entry>
<entry>Enable <link linkend="gadt">generalised algebraic data types</link>.
</entry>
<entry>dynamic</entry>
<entry><option>-XNoGADTs</option></entry>
</row>
<row>
<entry><option>-XGADTSyntax</option></entry>
<entry>Enable <link linkend="gadt-style">generalised algebraic data type syntax</link>.
</entry>
<entry>dynamic</entry>
<entry><option>-XNoGADTSyntax</option></entry>
</row>
<row>
<entry><option>-XTypeFamilies</option></entry>
<entry>Enable <link linkend="type-families">type families</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoTypeFamilies</option></entry>
</row>
<row>
<entry><option>-XConstraintKinds</option></entry>
<entry>Enable a <link linkend="constraint-kind">kind of constraints</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoConstraintKinds</option></entry>
</row>
<row>
<entry><option>-XDataKinds</option></entry>
<entry>Enable <link linkend="promotion">datatype promotion</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoDataKinds</option></entry>
</row>
<row>
<entry><option>-XPolyKinds</option></entry>
<entry>Enable <link linkend="kind-polymorphism">kind polymorphism</link>.
Implies <option>-XKindSignatures</option>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoPolyKinds</option></entry>
</row>
<row>
<entry><option>-XScopedTypeVariables</option></entry>
<entry>Enable <link linkend="scoped-type-variables">lexically-scoped type variables</link>.
Implied by <option>-fglasgow-exts</option>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoScopedTypeVariables</option></entry>
</row>
<row>
<entry><option>-XMonoLocalBinds</option></entry>
<entry>Enable <link linkend="mono-local-binds">do not generalise local bindings</link>.
Implied by <option>-XTypeFamilies</option> and <option>-XGADTs</option>.
</entry>
<entry>dynamic</entry>
<entry><option>-XNoMonoLocalBinds</option></entry>
</row>
<row>
<entry><option>-XTemplateHaskell</option></entry>
<entry>Enable <link linkend="template-haskell">Template Haskell</link>.
No longer implied by <option>-fglasgow-exts</option>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoTemplateHaskell</option></entry>
</row>
<row>
<entry><option>-XQuasiQuotes</option></entry>
<entry>Enable <link linkend="th-quasiquotation">quasiquotation</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoQuasiQuotes</option></entry>
</row>
<row>
<entry><option>-XBangPatterns</option></entry>
<entry>Enable <link linkend="bang-patterns">bang patterns</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoBangPatterns</option></entry>
</row>
<row>
<entry><option>-XCPP</option></entry>
<entry>Enable the <link linkend="c-pre-processor">C preprocessor</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoCPP</option></entry>
</row>
<row>
<entry><option>-XPatternGuards</option></entry>
<entry>Enable <link linkend="pattern-guards">pattern guards</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoPatternGuards</option></entry>
</row>
<row>
<entry><option>-XViewPatterns</option></entry>
<entry>Enable <link linkend="view-patterns">view patterns</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoViewPatterns</option></entry>
</row>
<row>
<entry><option>-XUnicodeSyntax</option></entry>
<entry>Enable <link linkend="unicode-syntax">unicode syntax</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoUnicodeSyntax</option></entry>
</row>
<row>
<entry><option>-XMagicHash</option></entry>
<entry>Allow "#" as a <link linkend="magic-hash">postfix modifier on identifiers</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoMagicHash</option></entry>
</row>
<row>
<entry><option>-XExplicitForAll</option></entry>
<entry>Enable <link linkend="explicit-foralls">explicit universal quantification</link>.
Implied by <option>-XScopedTypeVariables</option>,
<option>-XLiberalTypeSynonyms</option>,
<option>-XRankNTypes</option>,
<option>-XExistentialQuantification</option>
</entry>
<entry>dynamic</entry>
<entry><option>-XNoExplicitForAll</option></entry>
</row>
<row>
<entry><option>-XPolymorphicComponents</option></entry>
<entry>Enable <link linkend="universal-quantification">polymorphic components for data constructors</link>.</entry>
<entry>dynamic, synonym for <option>-XRankNTypes</option></entry>
<entry><option>-XNoPolymorphicComponents</option></entry>
</row>
<row>
<entry><option>-XRank2Types</option></entry>
<entry>Enable <link linkend="universal-quantification">rank-2 types</link>.</entry>
<entry>dynamic, synonym for <option>-XRankNTypes</option></entry>
<entry><option>-XNoRank2Types</option></entry>
</row>
<row>
<entry><option>-XRankNTypes</option></entry>
<entry>Enable <link linkend="universal-quantification">rank-N types</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoRankNTypes</option></entry>
</row>
<row>
<entry><option>-XImpredicativeTypes</option></entry>
<entry>Enable <link linkend="impredicative-polymorphism">impredicative types</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoImpredicativeTypes</option></entry>
</row>
<row>
<entry><option>-XExistentialQuantification</option></entry>
<entry>Enable <link linkend="existential-quantification">existential quantification</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoExistentialQuantification</option></entry>
</row>
<row>
<entry><option>-XKindSignatures</option></entry>
<entry>Enable <link linkend="kinding">kind signatures</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoKindSignatures</option></entry>
</row>
<row>
<entry><option>-XEmptyDataDecls</option></entry>
<entry>Enable empty data declarations.</entry>
<entry>dynamic</entry>
<entry><option>-XNoEmptyDataDecls</option></entry>
</row>
<row>
<entry><option>-XParallelListComp</option></entry>
<entry>Enable <link linkend="parallel-list-comprehensions">parallel list comprehensions</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoParallelListComp</option></entry>
</row>
<row>
<entry><option>-XTransformListComp</option></entry>
<entry>Enable <link linkend="generalised-list-comprehensions">generalised list comprehensions</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoTransformListComp</option></entry>
</row>
<row>
<entry><option>-XMonadComprehensions</option></entry>
<entry>Enable <link linkend="monad-comprehensions">monad comprehensions</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoMonadComprehensions</option></entry>
</row>
<row>
<entry><option>-XUnliftedFFITypes</option></entry>
<entry>Enable unlifted FFI types.</entry>
<entry>dynamic</entry>
<entry><option>-XNoUnliftedFFITypes</option></entry>
</row>
<row>
<entry><option>-XInterruptibleFFI</option></entry>
<entry>Enable interruptible FFI.</entry>
<entry>dynamic</entry>
<entry><option>-XNoInterruptibleFFI</option></entry>
</row>
<row>
<entry><option>-XLiberalTypeSynonyms</option></entry>
<entry>Enable <link linkend="type-synonyms">liberalised type synonyms</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoLiberalTypeSynonyms</option></entry>
</row>
<row>
<entry><option>-XTypeOperators</option></entry>
<entry>Enable type operators.</entry>
<entry>dynamic</entry>
<entry><option>-XNoTypeOperators</option></entry>
</row>
<row>
<entry><option>-XExplicitNamespaces</option></entry>
<entry>Enable using the keyword <literal>type</literal> to specify the namespace of entries in imports and exports.</entry>
<entry>dynamic</entry>
<entry><option>-XNoExplicitNamespaces</option></entry>
</row>
<row>
<entry><option>-XRecursiveDo</option></entry>
<entry>Enable <link linkend="recursive-do-notation">recursive do (mdo) notation</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoRecursiveDo</option></entry>
</row>
<row>
<entry><option>-XParallelArrays</option></entry>
<entry>Enable parallel arrays.</entry>
<entry>dynamic</entry>
<entry><option>-XNoParallelArrays</option></entry>
</row>
<row>
<entry><option>-XRecordWildCards</option></entry>
<entry>Enable <link linkend="record-wildcards">record wildcards</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoRecordWildCards</option></entry>
</row>
<row>
<entry><option>-XNamedFieldPuns</option></entry>
<entry>Enable <link linkend="record-puns">record puns</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoNamedFieldPuns</option></entry>
</row>
<row>
<entry><option>-XDisambiguateRecordFields</option></entry>
<entry>Enable <link linkend="disambiguate-fields">record field disambiguation</link>. </entry>
<entry>dynamic</entry>
<entry><option>-XNoDisambiguateRecordFields</option></entry>
</row>
<row>
<entry><option>-XUnboxedTuples</option></entry>
<entry>Enable <link linkend="unboxed-tuples">unboxed tuples</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoUnboxedTuples</option></entry>
</row>
<row>
<entry><option>-XStandaloneDeriving</option></entry>
<entry>Enable <link linkend="stand-alone-deriving">standalone deriving</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoStandaloneDeriving</option></entry>
</row>
<row>
<entry><option>-XDeriveDataTypeable</option></entry>
<entry>Enable <link linkend="deriving-typeable">deriving for the Data and Typeable classes</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoDeriveDataTypeable</option></entry>
</row>
<row>
<entry><option>-XAutoDeriveTypeable</option></entry>
<entry>Automatically <link linkend="auto-derive-typeable">derive Typeable instances for every datatype and type class declaration</link>.
Implies <option>-XDeriveDataTypeable</option>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoAutoDeriveTypeable</option></entry>
</row>
<row>
<entry><option>-XDeriveGeneric</option></entry>
<entry>Enable <link linkend="deriving-typeable">deriving for the Generic class</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoDeriveGeneric</option></entry>
</row>
<row>
<entry><option>-XGeneralizedNewtypeDeriving</option></entry>
<entry>Enable <link linkend="newtype-deriving">newtype deriving</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoGeneralizedNewtypeDeriving</option></entry>
</row>
<row>
<entry><option>-XTypeSynonymInstances</option></entry>
<entry>Enable <link linkend="flexible-instance-head">type synonyms in instance heads</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoTypeSynonymInstances</option></entry>
</row>
<row>
<entry><option>-XFlexibleContexts</option></entry>
<entry>Enable <link linkend="flexible-contexts">flexible contexts</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoFlexibleContexts</option></entry>
</row>
<row>
<entry><option>-XFlexibleInstances</option></entry>
<entry>Enable <link linkend="instance-rules">flexible instances</link>.
Implies <option>-XTypeSynonymInstances</option> </entry>
<entry>dynamic</entry>
<entry><option>-XNoFlexibleInstances</option></entry>
</row>
<row>
<entry><option>-XConstrainedClassMethods</option></entry>
<entry>Enable <link linkend="class-method-types">constrained class methods</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoConstrainedClassMethods</option></entry>
</row>
<row>
<entry><option>-XDefaultSignatures</option></entry>
<entry>Enable <link linkend="class-default-signatures">default signatures</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoDefaultSignatures</option></entry>
</row>
<row>
<entry><option>-XMultiParamTypeClasses</option></entry>
<entry>Enable <link linkend="multi-param-type-classes">multi parameter type classes</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoMultiParamTypeClasses</option></entry>
</row>
<row>
<entry><option>-XNullaryTypeClasses</option></entry>
<entry>Enable <link linkend="nullary-type-classes">nullary (no parameter) type classes</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoNullaryTypeClasses</option></entry>
</row>
<row>
<entry><option>-XFunctionalDependencies</option></entry>
<entry>Enable <link linkend="functional-dependencies">functional dependencies</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoFunctionalDependencies</option></entry>
</row>
<row>
<entry><option>-XPackageImports</option></entry>
<entry>Enable <link linkend="package-imports">package-qualified imports</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoPackageImports</option></entry>
</row>
<row>
<entry><option>-XLambdaCase</option></entry>
<entry>Enable <link linkend="lambda-case">lambda-case expressions</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoLambdaCase</option></entry>
</row>
<row>
<entry><option>-XMultiWayIf</option></entry>
<entry>Enable <link linkend="multi-way-if">multi-way if-expressions</link>.</entry>
<entry>dynamic</entry>
<entry><option>-XNoMultiWayIf</option></entry>
</row>
<row>
<entry><option>-XSafe</option></entry>
<entry>Enable the <link linkend="safe-haskell">Safe Haskell</link> Safe mode.</entry>
<entry>dynamic</entry>
<entry><option>-</option></entry>
</row>
<row>
<entry><option>-XTrustworthy</option></entry>
<entry>Enable the <link linkend="safe-haskell">Safe Haskell</link> Trustworthy mode.</entry>
<entry>dynamic</entry>
<entry><option>-</option></entry>
</row>
<row>
<entry><option>-XUnsafe</option></entry>
<entry>Enable <link linkend="safe-haskell">Safe Haskell</link> Unsafe mode.</entry>
<entry>dynamic</entry>
<entry><option>-</option></entry>
</row>
<row>
<entry><option>-fpackage-trust</option></entry>
<entry>Enable <link linkend="safe-haskell">Safe Haskell</link> trusted package requirement for trustworty modules.</entry>
<entry>dynamic</entry>
<entry><option>-</option></entry>
</row>
<row>
<entry><option>-XTypeHoles</option></entry>
<entry>Enable <link linkend="type-holes">holes</link> in expressions.</entry>
<entry>dynamic</entry>
<entry><option>-</option></entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Warnings</title>
<para><xref linkend="options-sanity"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-W</option></entry>
<entry>enable normal warnings</entry>
<entry>dynamic</entry>
<entry><option>-w</option></entry>
</row>
<row>
<entry><option>-w</option></entry>
<entry>disable all warnings</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-Wall</option></entry>
<entry>enable almost all warnings (details in <xref linkend="options-sanity"/>)</entry>
<entry>dynamic</entry>
<entry><option>-w</option></entry>
</row>
<row>
<entry><option>-Werror</option></entry>
<entry>make warnings fatal</entry>
<entry>dynamic</entry>
<entry>-Wwarn</entry>
</row>
<row>
<entry><option>-Wwarn</option></entry>
<entry>make warnings non-fatal</entry>
<entry>dynamic</entry>
<entry>-Werror</entry>
</row>
<row>
<entry><option>-fdefer-type-errors</option></entry>
<entry>Defer as many type errors as possible until runtime.</entry>
<entry>dynamic</entry>
<entry><option>-fno-defer-type-errors</option></entry>
</row>
<row>
<entry><option>-fhelpful-errors</option></entry>
<entry>Make suggestions for mis-spelled names.</entry>
<entry>dynamic</entry>
<entry><option>-fno-helpful-errors</option></entry>
</row>
<row>
<entry><option>-fwarn-deprecated-flags</option></entry>
<entry>warn about uses of commandline flags that are deprecated</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-deprecated-flags</option></entry>
</row>
<row>
<entry><option>-fwarn-duplicate-constraints</option></entry>
<entry>warn when a constraint appears duplicated in a type signature</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-duplicate-constraints</option></entry>
</row>
<row>
<entry><option>-fwarn-duplicate-exports</option></entry>
<entry>warn when an entity is exported multiple times</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-duplicate-exports</option></entry>
</row>
<row>
<entry><option>-fwarn-hi-shadowing</option></entry>
<entry>warn when a <literal>.hi</literal> file in the
current directory shadows a library</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-hi-shadowing</option></entry>
</row>
<row>
<entry><option>-fwarn-identities</option></entry>
<entry>warn about uses of Prelude numeric conversions that are probably
the identity (and hence could be omitted)</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-identities</option></entry>
</row>
<row>
<entry><option>-fwarn-implicit-prelude</option></entry>
<entry>warn when the Prelude is implicitly imported</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-implicit-prelude</option></entry>
</row>
<row>
<entry><option>-fwarn-incomplete-patterns</option></entry>
<entry>warn when a pattern match could fail</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-incomplete-patterns</option></entry>
</row>
<row>
<entry><option>-fwarn-incomplete-uni-patterns</option></entry>
<entry>warn when a pattern match in a lambda expression or pattern binding could fail</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-incomplete-uni-patterns</option></entry>
</row>
<row>
<entry><option>-fwarn-incomplete-record-updates</option></entry>
<entry>warn when a record update could fail</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-incomplete-record-updates</option></entry>
</row>
<row>
<entry><option>-fwarn-lazy-unlifted-bindings</option></entry>
<entry>warn when a pattern binding looks lazy but must be strict</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-lazy-unlifted-bindings</option></entry>
</row>
<row>
<entry><option>-fwarn-missing-fields</option></entry>
<entry>warn when fields of a record are uninitialised</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-missing-fields</option></entry>
</row>
<row>
<entry><option>-fwarn-missing-import-lists</option></entry>
<entry>warn when an import declaration does not explicitly
list all the names brought into scope</entry>
<entry>dynamic</entry>
<entry><option>-fnowarn-missing-import-lists</option></entry>
</row>
<row>
<entry><option>-fwarn-missing-methods</option></entry>
<entry>warn when class methods are undefined</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-missing-methods</option></entry>
</row>
<row>
<entry><option>-fwarn-missing-signatures</option></entry>
<entry>warn about top-level functions without signatures</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-missing-signatures</option></entry>
</row>
<row>
<entry><option>-fwarn-missing-local-sigs</option></entry>
<entry>warn about polymorphic local bindings without signatures</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-missing-local-sigs</option></entry>
</row>
<row>
<entry><option>-fwarn-monomorphism-restriction</option></entry>
<entry>warn when the Monomorphism Restriction is applied</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-monomorphism-restriction</option></entry>
</row>
<row>
<entry><option>-fwarn-name-shadowing</option></entry>
<entry>warn when names are shadowed</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-name-shadowing</option></entry>
</row>
<row>
<entry><option>-fwarn-orphans, -fwarn-auto-orphans</option></entry>
<entry>warn when the module contains <link linkend="orphan-modules">orphan instance declarations
or rewrite rules</link></entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-orphans, -fno-warn-auto-orphans</option></entry>
</row>
<row>
<entry><option>-fwarn-overlapping-patterns</option></entry>
<entry>warn about overlapping patterns</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-overlapping-patterns</option></entry>
</row>
<row>
<entry><option>-fwarn-tabs</option></entry>
<entry>warn if there are tabs in the source file</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-tabs</option></entry>
</row>
<row>
<entry><option>-fwarn-type-defaults</option></entry>
<entry>warn when defaulting happens</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-type-defaults</option></entry>
</row>
<row>
<entry><option>-fwarn-unrecognised-pragmas</option></entry>
<entry>warn about uses of pragmas that GHC doesn't recognise</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-unrecognised-pragmas</option></entry>
</row>
<row>
<entry><option>-fwarn-unused-binds</option></entry>
<entry>warn about bindings that are unused</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-unused-binds</option></entry>
</row>
<row>
<entry><option>-fwarn-unused-imports</option></entry>
<entry>warn about unnecessary imports</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-unused-imports</option></entry>
</row>
<row>
<entry><option>-fwarn-unused-matches</option></entry>
<entry>warn about variables in patterns that aren't used</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-unused-matches</option></entry>
</row>
<row>
<entry><option>-fwarn-unused-do-bind</option></entry>
<entry>warn about do bindings that appear to throw away values of types other than <literal>()</literal></entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-unused-do-bind</option></entry>
</row>
<row>
<entry><option>-fwarn-wrong-do-bind</option></entry>
<entry>warn about do bindings that appear to throw away monadic values that you should have bound instead</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-wrong-do-bind</option></entry>
</row>
<row>
<entry><option>-fwarn-unsafe</option></entry>
<entry>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.</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-unsafe</option></entry>
</row>
<row>
<entry><option>-fwarn-safe</option></entry>
<entry>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.</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-safe</option></entry>
</row>
<row>
<entry><option>-fwarn-warnings-deprecations</option></entry>
<entry>warn about uses of functions &amp; types that have warnings or deprecated pragmas</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-warnings-deprecations</option></entry>
</row>
<row>
<entry><option>-fwarn-typeable-instances</option></entry>
<entry>warn if there are any handwritten <literal>Typeable</literal>
instances (see <xref linkend="deriving-typeable"/>)</entry>
<entry>dynamic</entry>
<entry><option>-fno-warn-typeable-instances</option></entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Optimisation levels</title>
<para><xref linkend="options-optimise"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-O</option></entry>
<entry>Enable default optimisation (level 1)</entry>
<entry>dynamic</entry>
<entry><option>-O0</option></entry>
</row>
<row>
<entry><option>-O</option><replaceable>n</replaceable></entry>
<entry>Set optimisation level <replaceable>n</replaceable></entry>
<entry>dynamic</entry>
<entry><option>-O0</option></entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Individual optimisations</title>
<para><xref linkend="options-f"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-fcase-merge</option></entry>
<entry>Enable case-merging. Implied by <option>-O</option>.</entry>
<entry>dynamic</entry>
<entry><option>-fno-case-merge</option></entry>
</row>
<row>
<entry><option>-fcse</option></entry>
<entry>Turn on common sub-expression elimination. Implied by <option>-O</option>.</entry>
<entry>dynamic</entry>
<entry>-fno-cse</entry>
</row>
<row>
<entry><option>-fdicts-strict</option></entry>
<entry>Make dictionaries strict</entry>
<entry>static</entry>
<entry><option>-fno-dicts-strict</option></entry>
</row>
<row>
<entry><option>-fdo-eta-reduction</option></entry>
<entry>Enable eta-reduction. Implied by <option>-O</option>.</entry>
<entry>dynamic</entry>
<entry><option>-fno-do-eta-reduction</option></entry>
</row>
<row>
<entry><option>-fdo-lambda-eta-expansion</option></entry>
<entry>Enable lambda eta-reduction</entry>
<entry>dynamic</entry>
<entry><option>-fno-do-lambda-eta-expansion</option></entry>
</row>
<row>
<entry><option>-feager-blackholing</option></entry>
<entry>Turn on <link linkend="parallel-compile-options">eager blackholing</link></entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fenable-rewrite-rules</option></entry>
<entry>Switch on all rewrite rules (including rules
generated by automatic specialisation of overloaded functions).
Implied by <option>-O</option>. </entry>
<entry>dynamic</entry>
<entry><option>-fno-enable-rewrite-rules</option></entry>
</row>
<row>
<entry><option>-fvectorise</option></entry>
<entry>Enable vectorisation of nested data parallelism</entry>
<entry>dynamic</entry>
<entry><option>-fno-vectorise</option></entry>
</row>
<row>
<entry><option>-favoid-vect</option></entry>
<entry>Enable vectorisation avoidance (EXPERIMENTAL)</entry>
<entry>dynamic</entry>
<entry><option>-fno-avoid-vect</option></entry>
</row>
<row>
<entry><option>-fexcess-precision</option></entry>
<entry>Enable excess intermediate precision</entry>
<entry>dynamic</entry>
<entry><option>-fno-excess-precision</option></entry>
</row>
<row>
<entry><option>-ffloat-in</option></entry>
<entry>Turn on the float-in transformation. Implied by <option>-O</option>.</entry>
<entry>dynamic</entry>
<entry>-fno-float-in</entry>
</row>
<row>
<entry><option>-ffull-laziness</option></entry>
<entry>Turn on full laziness (floating bindings outwards). Implied by <option>-O</option>.</entry>
<entry>dynamic</entry>
<entry>-fno-full-laziness</entry>
</row>
<row>
<entry><option>-fignore-asserts</option></entry>
<entry>Ignore assertions in the source</entry>
<entry>dynamic</entry>
<entry><option>-fno-ignore-asserts</option></entry>
</row>
<row>
<entry><option>-fignore-interface-pragmas</option></entry>
<entry>Ignore pragmas in interface files</entry>
<entry>dynamic</entry>
<entry><option>-fno-ignore-interface-pragmas</option></entry>
</row>
<row>
<entry><option>-fliberate-case</option></entry>
<entry>Turn on the liberate-case transformation. Implied by <option>-O2</option>.</entry>
<entry>dynamic</entry>
<entry>-fno-liberate-case</entry>
</row>
<row>
<entry><option>-fliberate-case-threshold</option>=<replaceable>n</replaceable></entry>
<entry>Set the size threshold for the liberate-case transformation to <replaceable>n</replaceable> (default: 200)</entry>
<entry>static</entry>
<entry><option>-fno-liberate-case-threshold</option></entry>
</row>
<row>
<entry><option>-fmax-simplifier-iterations</option></entry>
<entry>Set the max iterations for the simplifier</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fmax-worker-args</option></entry>
<entry>If a worker has that many arguments, none will be
unpacked anymore (default: 10)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fno-opt-coercion</option></entry>
<entry>Turn off the coercion optimiser</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fno-pre-inlining</option></entry>
<entry>Turn off pre-inlining</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fno-state-hack</option></entry>
<entry>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.</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fpedantic-bottoms</option></entry>
<entry>Make GHC be more precise about its treatment of bottom (but see also
<option>-fno-state-hack</option>). In particular, GHC will not
eta-expand through a case expression.</entry>
<entry>dynamic</entry>
<entry><option>-fno-pedantic-bottoms</option></entry>
</row>
<row>
<entry><option>-fomit-interface-pragmas</option></entry>
<entry>Don't generate interface pragmas</entry>
<entry>dynamic</entry>
<entry><option>-fno-omit-interface-pragmas</option></entry>
</row>
<row>
<entry><option>-fsimplifier-phases</option></entry>
<entry>Set the number of phases for the simplifier (default 2).
Ignored with <option>-O0</option>.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fsimpl-tick-factor=<replaceable>n</replaceable></option></entry>
<entry>Set the percentage factor for simplifier ticks (default 100)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fspec-constr</option></entry>
<entry>Turn on the SpecConstr transformation. Implied by <option>-O2</option>.</entry>
<entry>dynamic</entry>
<entry>-fno-spec-constr</entry>
</row>
<row>
<entry><option>-fspec-constr-threshold</option>=<replaceable>n</replaceable></entry>
<entry>Set the size threshold for the SpecConstr transformation to <replaceable>n</replaceable> (default: 200)</entry>
<entry>static</entry>
<entry><option>-fno-spec-constr-threshold</option></entry>
</row>
<row>
<entry><option>-fspec-constr-count</option>=<replaceable>n</replaceable></entry>
<entry>Set to <replaceable>n</replaceable> (default: 3) the maximum number of
specialisations that will be created for any one function
by the SpecConstr transformation</entry>
<entry>static</entry>
<entry><option>-fno-spec-constr-count</option></entry>
</row>
<row>
<entry><option>-fspecialise</option></entry>
<entry>Turn on specialisation of overloaded functions. Implied by <option>-O</option>.</entry>
<entry>dynamic</entry>
<entry>-fno-specialise</entry>
</row>
<row>
<entry><option>-fstrictness</option></entry>
<entry>Turn on strictness analysis. Implied by <option>-O</option>.</entry>
<entry>dynamic</entry>
<entry>-fno-strictness</entry>
</row>
<row>
<entry><option>-fstrictness=before</option>=<replaceable>n</replaceable></entry>
<entry>Run an additional strictness analysis before simplifier
phase <replaceable>n</replaceable></entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fstatic-argument-transformation</option></entry>
<entry>Turn on the static argument transformation. Implied by <option>-O2</option>.</entry>
<entry>dynamic</entry>
<entry>-fno-static-argument-transformation</entry>
</row>
<row>
<entry><option>-funbox-strict-fields</option></entry>
<entry>Flatten strict constructor fields</entry>
<entry>dynamic</entry>
<entry><option>-fno-unbox-strict-fields</option></entry>
</row>
<row>
<entry><option>-funbox-small-strict-fields</option></entry>
<entry>Flatten strict constructor fields with a
pointer-sized representation</entry>
<entry>dynamic</entry>
<entry><option>-fno-unbox-small-strict-fields</option></entry>
</row>
<row>
<entry><option>-funfolding-creation-threshold</option></entry>
<entry>Tweak unfolding settings</entry>
<entry>dynamic</entry>
<entry><option>-fno-unfolding-creation-threshold</option></entry>
</row>
<row>
<entry><option>-funfolding-fun-discount</option></entry>
<entry>Tweak unfolding settings</entry>
<entry>dynamic</entry>
<entry><option>-fno-unfolding-fun-discount</option></entry>
</row>
<row>
<entry><option>-funfolding-keeness-factor</option></entry>
<entry>Tweak unfolding settings</entry>
<entry>dynamic</entry>
<entry><option>-fno-unfolding-keeness-factor</option></entry>
</row>
<row>
<entry><option>-funfolding-use-threshold</option></entry>
<entry>Tweak unfolding settings</entry>
<entry>dynamic</entry>
<entry><option>-fno-unfolding-use-threshold</option></entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Profiling options</title>
<para><xref linkend="profiling"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-prof</option></entry>
<entry>Turn on profiling</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fprof-auto</option></entry>
<entry>Auto-add <literal>SCC</literal>s to all bindings
not marked INLINE</entry>
<entry>dynamic</entry>
<entry><option>-fno-prof-auto</option></entry>
</row>
<row>
<entry><option>-fprof-auto-top</option></entry>
<entry>Auto-add <literal>SCC</literal>s to all top-level
bindings not marked INLINE</entry>
<entry>dynamic</entry>
<entry><option>-fno-prof-auto</option></entry>
</row>
<row>
<entry><option>-fprof-auto-exported</option></entry>
<entry>Auto-add <literal>SCC</literal>s to all exported
bindings not marked INLINE</entry>
<entry>dynamic</entry>
<entry><option>-fno-prof-auto</option></entry>
</row>
<row>
<entry><option>-fprof-cafs</option></entry>
<entry>Auto-add <literal>SCC</literal>s to all CAFs</entry>
<entry>dynamic</entry>
<entry><option>-fno-prof-cafs</option></entry>
</row>
<row>
<entry><option>-fno-prof-count-entries</option></entry>
<entry>Do not collect entry counts</entry>
<entry>dynamic</entry>
<entry><option>-fprof-count-entries</option></entry>
</row>
<row>
<entry><option>-ticky</option></entry>
<entry><link linkend="ticky-ticky">Turn on ticky-ticky profiling</link></entry>
<entry>static</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Program coverage options</title>
<para><xref linkend="hpc"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-fhpc</option></entry>
<entry>Turn on Haskell program coverage instrumentation</entry>
<entry>dynamic</entry>
<entry><option>-</option></entry>
</row>
<row>
<entry><option>-hpcdir dir</option></entry>
<entry>Directory to deposit .mix files during compilation (default is .hpc)</entry>
<entry>dynamic</entry>
<entry><option>-</option></entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Haskell pre-processor options</title>
<para><xref linkend="pre-processor"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-F</option></entry>
<entry>
Enable the use of a pre-processor
(set with <option>-pgmF</option>)
</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>C pre-processor options</title>
<para><xref linkend="c-pre-processor"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-cpp</option></entry>
<entry>Run the C pre-processor on Haskell source files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-D</option><replaceable>symbol</replaceable><optional>=<replaceable>value</replaceable></optional></entry>
<entry>Define a symbol in the C pre-processor</entry>
<entry>dynamic</entry>
<entry><option>-U</option><replaceable>symbol</replaceable></entry>
</row>
<row>
<entry><option>-U</option><replaceable>symbol</replaceable></entry>
<entry>Undefine a symbol in the C pre-processor</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-I</option><replaceable>dir</replaceable></entry>
<entry>Add <replaceable>dir</replaceable> to the
directory search list for <literal>#include</literal> files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Code generation options</title>
<para><xref linkend="options-codegen"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-fasm</option></entry>
<entry>Use the <link linkend="native-code-gen">native code
generator</link></entry>
<entry>dynamic</entry>
<entry>-fllvm</entry>
</row>
<row>
<entry><option>-fllvm</option></entry>
<entry>Compile using the <link linkend="llvm-code-gen">LLVM code
generator</link></entry>
<entry>dynamic</entry>
<entry>-fasm</entry>
</row>
<row>
<entry><option>-fno-code</option></entry>
<entry>Omit code generation</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fbyte-code</option></entry>
<entry>Generate byte-code</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fobject-code</option></entry>
<entry>Generate object code</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Linking options</title>
<para><xref linkend="options-linker"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-shared</option></entry>
<entry>Generate a shared library (as opposed to an executable)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fPIC</option></entry>
<entry>Generate position-independent code (where available)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dynamic</option></entry>
<entry>Use dynamic Haskell libraries (if available)</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dynload</option></entry>
<entry>Selects one of a number of modes for finding shared
libraries at runtime.</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-framework</option> <replaceable>name</replaceable></entry>
<entry>On Darwin/MacOS X only, link in the framework <replaceable>name</replaceable>.
This option corresponds to the <option>-framework</option> option for Apple's Linker.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-framework-path</option> <replaceable>name</replaceable></entry>
<entry>On Darwin/MacOS X only, add <replaceable>dir</replaceable> to the list of
directories searched for frameworks.
This option corresponds to the <option>-F</option> option for Apple's Linker.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-l</option><replaceable>lib</replaceable></entry>
<entry>Link in library <replaceable>lib</replaceable></entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-L</option><replaceable>dir</replaceable></entry>
<entry>Add <replaceable>dir</replaceable> to the list of
directories searched for libraries</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-main-is</option></entry>
<entry>Set main module and function</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>--mk-dll</option></entry>
<entry>DLL-creation mode (Windows only)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-no-hs-main</option></entry>
<entry>Don't assume this program contains <literal>main</literal></entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-rtsopts</option>, <option>-rtsopts={none,some,all}</option></entry>
<entry>Control whether the RTS behaviour can be tweaked via command-line
flags and the <literal>GHCRTS</literal> environment
variable. Using <literal>none</literal> means no RTS flags can be given; <literal>some</literal> means only a minimum of safe options can be given (the default), and <literal>all</literal> (or no argument at all) means that all RTS flags are permitted.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-with-rtsopts=<replaceable>opts</replaceable></option></entry>
<entry>Set the default RTS options to
<replaceable>opts</replaceable>.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-no-link</option></entry>
<entry>Omit linking</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-split-objs</option></entry>
<entry>Split objects (for libraries)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-static</option></entry>
<entry>Use static Haskell libraries</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-threaded</option></entry>
<entry>Use the threaded runtime</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-debug</option></entry>
<entry>Use the debugging runtime</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-eventlog</option></entry>
<entry>Enable runtime event tracing</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fno-gen-manifest</option></entry>
<entry>Do not generate a manifest file (Windows only)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fno-embed-manifest</option></entry>
<entry>Do not embed the manifest in the executable (Windows only)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fno-shared-implib</option></entry>
<entry>Don't generate an import library for a DLL (Windows only)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dylib-install-name</option> <replaceable>path</replaceable></entry>
<entry>Set the install name (via <literal>-install_name</literal> 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)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Plugin options</title>
<para><xref linkend="compiler-plugins"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-fplugin</option>=<replaceable>module</replaceable></entry>
<entry>Load a plugin exported by a given module</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fplugin-opt</option>=<replaceable>module:args</replaceable></entry>
<entry>Give arguments to a plugin module; module must be specified with <option>-fplugin</option></entry>
<entry>static</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Replacing phases</title>
<para><xref linkend="replacing-phases"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-pgmL</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the literate pre-processor</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-pgmP</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the C
pre-processor (with <option>-cpp</option> only)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-pgmc</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the C compiler</entry>
<entry>dynamic</entry>
<entry>-</entry>
<row>
<entry><option>-pgmlo</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the LLVM optimiser</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-pgmlc</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the LLVM compiler</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</row>
<row>
<entry><option>-pgms</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the splitter</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-pgma</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the assembler</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-pgml</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the linker</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-pgmdll</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the DLL generator</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-pgmF</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the pre-processor
(with <option>-F</option> only)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-pgmwindres</option> <replaceable>cmd</replaceable></entry>
<entry>Use <replaceable>cmd</replaceable> as the program for
embedding manifests on Windows.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
<indexterm><primary><option>-pgmL</option></primary></indexterm>
<indexterm><primary><option>-pgmP</option></primary></indexterm>
<indexterm><primary><option>-pgmc</option></primary></indexterm>
<indexterm><primary><option>-pgmlo</option></primary></indexterm>
<indexterm><primary><option>-pgmlc</option></primary></indexterm>
<indexterm><primary><option>-pgma</option></primary></indexterm>
<indexterm><primary><option>-pgml</option></primary></indexterm>
<indexterm><primary><option>-pgmdll</option></primary></indexterm>
<indexterm><primary><option>-pgmF</option></primary></indexterm>
</sect2>
<sect2>
<title>Forcing options to particular phases</title>
<para><xref linkend="forcing-options-through"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-optL</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to the literate pre-processor</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-optP</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to cpp (with
<option>-cpp</option> only)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-optF</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to the
custom pre-processor</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-optc</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to the C compiler</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-optlo</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to the LLVM optimiser</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-optlc</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to the LLVM compiler</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-optm</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to the mangler</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-opta</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to the assembler</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-optl</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to the linker</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-optdll</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to the DLL generator</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-optwindres</option> <replaceable>option</replaceable></entry>
<entry>pass <replaceable>option</replaceable> to <literal>windres</literal>.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Platform-specific options</title>
<para><xref linkend="options-platform"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-msse2</option></entry>
<entry>(x86 only) Use SSE2 for floating point</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
<tbody>
<row>
<entry><option>-monly-[432]-regs</option></entry>
<entry>(x86 only) give some registers back to the C compiler</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>External core file options</title>
<para><xref linkend="ext-core"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-fext-core</option></entry>
<entry>Generate <filename>.hcr</filename> external Core files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Compiler debugging options</title>
<para><xref linkend="options-debugging"/></para>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-dcore-lint</option></entry>
<entry>Turn on internal sanity checking</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-to-file</option></entry>
<entry>Dump to files instead of stdout</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-asm</option></entry>
<entry>Dump assembly</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-bcos</option></entry>
<entry>Dump interpreter byte code</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-cmm</option></entry>
<entry>Dump C-- output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-core-stats</option></entry>
<entry>Print a one-line summary of the size of the Core program
at the end of the optimisation pipeline </entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-cpranal</option></entry>
<entry>Dump output from CPR analysis</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-cse</option></entry>
<entry>Dump CSE output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-deriv</option></entry>
<entry>Dump deriving output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-ds</option></entry>
<entry>Dump desugarer output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-flatC</option></entry>
<entry>Dump &ldquo;flat&rdquo; C</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-foreign</option></entry>
<entry>Dump <literal>foreign export</literal> stubs</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-hpc</option></entry>
<entry>Dump after instrumentation for program coverage</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-inlinings</option></entry>
<entry>Dump inlining info</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-llvm</option></entry>
<entry>Dump LLVM intermediate code</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-occur-anal</option></entry>
<entry>Dump occurrence analysis output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-opt-cmm</option></entry>
<entry>Dump the results of C-- to C-- optimising passes</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-parsed</option></entry>
<entry>Dump parse tree</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-prep</option></entry>
<entry>Dump prepared core</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-rn</option></entry>
<entry>Dump renamer output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-rule-firings</option></entry>
<entry>Dump rule firing info</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-rule-rewrites</option></entry>
<entry>Dump detailed rule firing info</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-rules</option></entry>
<entry>Dump rules</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-vect</option></entry>
<entry>Dump vectoriser input and output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-simpl</option></entry>
<entry>Dump final simplifier output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-simpl-phases</option></entry>
<entry>Dump output from each simplifier phase</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-simpl-iterations</option></entry>
<entry>Dump output from each simplifier iteration</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-spec</option></entry>
<entry>Dump specialiser output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-splices</option></entry>
<entry>Dump TH spliced expressions, and what they evaluate to</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-stg</option></entry>
<entry>Dump final STG</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-stranal</option></entry>
<entry>Dump strictness analyser output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-tc</option></entry>
<entry>Dump typechecker output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-types</option></entry>
<entry>Dump type signatures</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-worker-wrapper</option></entry>
<entry>Dump worker-wrapper output</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-if-trace</option></entry>
<entry>Trace interface files</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-tc-trace</option></entry>
<entry>Trace typechecker</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-vt-trace</option></entry>
<entry>Trace vectoriser</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-rn-trace</option></entry>
<entry>Trace renamer</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-rn-stats</option></entry>
<entry>Renamer stats</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-ddump-simpl-stats</option></entry>
<entry>Dump simplifier stats</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dno-debug-output</option></entry>
<entry>Suppress unsolicited debugging output</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dppr-debug</option></entry>
<entry>Turn on debug printing (more verbose)</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dppr-noprags</option></entry>
<entry>Don't output pragma info in dumps</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dppr-user-length</option></entry>
<entry>Set the depth for printing expressions in error msgs</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dppr-colsNNN</option></entry>
<entry>Set the width of debugging output. For example <option>-dppr-cols200</option></entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dppr-case-as-let</option></entry>
<entry>Print single alternative case expressions as strict lets.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dsuppress-all</option></entry>
<entry>In core dumps, suppress everything (except for uniques) that is suppressable.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dsuppress-uniques</option></entry>
<entry>Suppress the printing of uniques in debug output (easier to use <command>diff</command>)</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dsuppress-idinfo</option></entry>
<entry>Suppress extended information about identifiers where they are bound</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dsuppress-module-prefixes</option></entry>
<entry>Suppress the printing of module qualification prefixes</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dsuppress-type-signatures</option></entry>
<entry>Suppress type signatures</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dsuppress-type-applications</option></entry>
<entry>Suppress type applications</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dsuppress-coercions</option></entry>
<entry>Suppress the printing of coercions in Core dumps to make them shorter</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dsource-stats</option></entry>
<entry>Dump haskell source stats</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dcmm-lint</option></entry>
<entry>C-- pass sanity checking</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dstg-lint</option></entry>
<entry>STG pass sanity checking</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dstg-stats</option></entry>
<entry>Dump STG stats</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dverbose-core2core</option></entry>
<entry>Show output from each core-to-core pass</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dverbose-stg2stg</option></entry>
<entry>Show output from each STG-to-STG pass</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dshow-passes</option></entry>
<entry>Print out each pass name as it happens</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dfaststring-stats</option></entry>
<entry>Show statistics for fast string usage when finished</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
<sect2>
<title>Misc compiler options</title>
<informaltable>
<tgroup cols="4" align="left" colsep="1" rowsep="1">
<thead>
<row>
<entry>Flag</entry>
<entry>Description</entry>
<entry>Static/Dynamic</entry>
<entry>Reverse</entry>
</row>
</thead>
<tbody>
<row>
<entry><option>-fno-hi-version-check</option></entry>
<entry>Don't complain about <literal>.hi</literal> file mismatches</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-dno-black-holing</option></entry>
<entry>Turn off black holing (probably doesn't work)</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fhistory-size</option></entry>
<entry>Set simplification history size</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-funregisterised</option></entry>
<entry><link linkend="unreg">Unregisterised</link> compilation (use <option>-unreg</option> instead)</entry>
<entry>static</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fno-ghci-history</option></entry>
<entry>Do not use the load/store the GHCi command history from/to <literal>ghci_history</literal>.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
<row>
<entry><option>-fno-ghci-sandbox</option></entry>
<entry>Turn off the GHCi sandbox. Means computations are run in the main thread, rather than a forked thread.</entry>
<entry>dynamic</entry>
<entry>-</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
</sect1>
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