docs/users_guide/flags.xml

   1 <?xml version="1.0" encoding="iso-8859-1"?>
   2   <sect1 id="flag-reference">
   3     <title>Flag reference</title>
   4
   5     <para>This section is a quick-reference for GHC's command-line
   6     flags.  For each flag, we also list its static/dynamic status (see
   7     <xref linkend="static-dynamic-flags"/>), and the flag's opposite
   8     (if available).</para>
   9
  10     <sect2>
  11       <title>Help and verbosity options</title>
  12
  13       <para><xref linkend="options-help"/></para>
  14
  15       <informaltable>
  16         <tgroup cols="4" align="left" colsep="1" rowsep="1">
  17           <thead>
  18             <row>
  19               <entry>Flag</entry>
  20               <entry>Description</entry>
  21               <entry>Static/Dynamic</entry>
  22               <entry>Reverse</entry>
  23             </row>
  24           </thead>
  25           <tbody>
  26             <row>
  27               <entry><option>-?</option></entry>
  28               <entry>help</entry>
  29               <entry>mode</entry>
  30               <entry>-</entry>
  31             </row>
  32             <row>
  33               <entry><option>-help</option></entry>
  34               <entry>help</entry>
  35               <entry>mode</entry>
  36               <entry>-</entry>
  37             </row>
  38             <row>
  39               <entry><option>-n</option></entry>
  40               <entry>do a dry run</entry>
  41               <entry>dynamic</entry>
  42               <entry>-</entry>
  43             </row>
  44             <row>
  45               <entry><option>-v</option></entry>
  46               <entry>verbose mode (equivalent to <option>-v3</option>)</entry>
  47               <entry>dynamic</entry>
  48               <entry>-</entry>
  49             </row>
  50             <row>
  51               <entry><option>-v</option><replaceable>n</replaceable></entry>
  52               <entry>set verbosity level</entry>
  53               <entry>dynamic</entry>
  54               <entry>-</entry>
  55             </row>
  56             <row>
  57               <entry><option>-V</option></entry>
  58               <entry>display GHC version</entry>
  59               <entry>mode</entry>
  60               <entry>-</entry>
  61             </row>
  62             <row>
  63               <entry><option>&ndash;&ndash;supported-extensions</option> or <option>&ndash;&ndash;supported-languages</option></entry>
  64               <entry>display the supported languages and language extensions</entry>
  65               <entry>mode</entry>
  66               <entry>-</entry>
  67             </row>
  68             <row>
  69               <entry><option>&ndash;&ndash;info</option></entry>
  70               <entry>display information about the compiler</entry>
  71               <entry>mode</entry>
  72               <entry>-</entry>
  73             </row>
  74             <row>
  75               <entry><option>&ndash;&ndash;version</option></entry>
  76               <entry>display GHC version</entry>
  77               <entry>mode</entry>
  78               <entry>-</entry>
  79             </row>
  80             <row>
  81               <entry><option>&ndash;&ndash;numeric-version</option></entry>
  82               <entry>display GHC version (numeric only)</entry>
  83               <entry>mode</entry>
  84               <entry>-</entry>
  85             </row>
  86             <row>
  87               <entry><option>&ndash;&ndash;print-libdir</option></entry>
  88               <entry>display GHC library directory</entry>
  89               <entry>mode</entry>
  90               <entry>-</entry>
  91             </row>
  92             <row>
  93               <entry><option>-ferror-spans</option></entry>
  94               <entry>output full span in error messages</entry>
  95               <entry>static</entry>
  96               <entry>-</entry>
  97             </row>
  98             <row>
  99               <entry><option>-H</option><replaceable>size</replaceable></entry>
 100               <entry>Set the minimum heap size to <replaceable>size</replaceable></entry>
 101               <entry>static</entry>
 102               <entry>-</entry>
 103             </row>
 104             <row>
 105               <entry><option>-Rghc-timing</option></entry>
 106               <entry>Summarise timing stats for GHC (same as <literal>+RTS -tstderr</literal>)</entry>
 107               <entry>static</entry>
 108               <entry>-</entry>
 109             </row>
 110           </tbody>
 111         </tgroup>
 112       </informaltable>
 113
 114     </sect2>
 115     <sect2>
 116       <title>Which phases to run</title>
 117
 118       <para><xref linkend="options-order"/></para>
 119
 120       <informaltable>
 121         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 122           <thead>
 123             <row>
 124               <entry>Flag</entry>
 125               <entry>Description</entry>
 126               <entry>Static/Dynamic</entry>
 127               <entry>Reverse</entry>
 128             </row>
 129           </thead>
 130           <tbody>
 131             <row>
 132               <entry><option>-E</option></entry>
 133               <entry>Stop after preprocessing (<literal>.hspp</literal> file)</entry>
 134               <entry>mode</entry>
 135               <entry>-</entry>
 136             </row>
 137             <row>
 138               <entry><option>-C</option></entry>
 139               <entry>Stop after generating C (<literal>.hc</literal> file)</entry>
 140               <entry>mode</entry>
 141               <entry>-</entry>
 142             </row>
 143             <row>
 144               <entry><option>-S</option></entry>
 145               <entry>Stop after generating assembly (<literal>.s</literal> file)</entry>
 146               <entry>mode</entry>
 147               <entry>-</entry>
 148             </row>
 149             <row>
 150               <entry><option>-c</option></entry>
 151               <entry>Do not link</entry>
 152               <entry>dynamic</entry>
 153               <entry>-</entry>
 154             </row>
 155             <row>
 156               <entry><option>-x</option> <replaceable>suffix</replaceable></entry>
 157               <entry>Override default behaviour for source files</entry>
 158               <entry>static</entry>
 159               <entry>-</entry>
 160             </row>
 161           </tbody>
 162         </tgroup>
 163       </informaltable>
 164     </sect2>
 165
 166      <sect2>
 167       <title>Alternative modes of operation</title>
 168
 169       <para><xref linkend="modes"/></para>
 170
 171       <informaltable>
 172         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 173           <thead>
 174             <row>
 175               <entry>Flag</entry>
 176               <entry>Description</entry>
 177               <entry>Static/Dynamic</entry>
 178               <entry>Reverse</entry>
 179             </row>
 180           </thead>
 181           <tbody>
 182             <row>
 183               <entry><option>--interactive</option></entry>
 184               <entry>Interactive mode - normally used by just running <command>ghci</command>;
 185               see <xref linkend="ghci"/> for details.</entry>
 186               <entry>mode</entry>
 187               <entry>-</entry>
 188             </row>
 189             <row>
 190               <entry><option>--make</option></entry>
 191               <entry>Build a multi-module Haskell program, automatically figuring out dependencies. Likely to be much easier, and faster, than using <command>make</command>;
 192               see <xref linkend="make-mode"/> for details..</entry>
 193               <entry>mode</entry>
 194               <entry>-</entry>
 195             </row>
 196             <row>
 197               <entry><option>-e <replaceable>expr</replaceable></option></entry>
 198               <entry>Evaluate <replaceable>expr</replaceable>;
 199               see <xref linkend="eval-mode"/> for details.</entry>
 200               <entry>mode</entry>
 201               <entry>-</entry>
 202             </row>
 203             <row>
 204               <entry><option>-M</option></entry>
 205               <entry>Generate dependency information suitable for use in a <filename>Makefile</filename>;
 206               see <xref linkend="makefile-dependencies"/> for details.</entry>
 207               <entry>mode</entry>
 208               <entry>-</entry>
 209             </row>
 210           </tbody>
 211         </tgroup>
 212       </informaltable>
 213     </sect2>
 214
 215     <sect2>
 216       <title>Redirecting output</title>
 217
 218       <para><xref linkend="options-output"/></para>
 219
 220       <informaltable>
 221         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 222           <thead>
 223             <row>
 224               <entry>Flag</entry>
 225               <entry>Description</entry>
 226               <entry>Static/Dynamic</entry>
 227               <entry>Reverse</entry>
 228             </row>
 229           </thead>
 230           <tbody>
 231             <row>
 232               <entry><option>-hcsuf</option> <replaceable>suffix</replaceable></entry>
 233               <entry>set the suffix to use for intermediate C files</entry>
 234               <entry>dynamic</entry>
 235               <entry>-</entry>
 236             </row>
 237             <row>
 238               <entry><option>-hidir</option> <replaceable>dir</replaceable></entry>
 239               <entry>set directory for interface files</entry>
 240               <entry>dynamic</entry>
 241               <entry>-</entry>
 242             </row>
 243             <row>
 244               <entry><option>-hisuf</option> <replaceable>suffix</replaceable></entry>
 245               <entry>set the suffix to use for interface files</entry>
 246               <entry>dynamic</entry>
 247               <entry>-</entry>
 248             </row>
 249             <row>
 250               <entry><option>-o</option> <replaceable>filename</replaceable></entry>
 251               <entry>set output filename</entry>
 252               <entry>dynamic</entry>
 253               <entry>-</entry>
 254             </row>
 255             <row>
 256               <entry><option>-odir</option> <replaceable>dir</replaceable></entry>
 257               <entry>set directory for object files</entry>
 258               <entry>dynamic</entry>
 259               <entry>-</entry>
 260             </row>
 261             <row>
 262               <entry><option>-ohi</option> <replaceable>filename</replaceable></entry>
 263               <entry>set the filename in which to put the interface</entry>
 264               <entry>dynamic</entry>
 265               <entry></entry>
 266             </row>
 267             <row>
 268               <entry><option>-osuf</option> <replaceable>suffix</replaceable></entry>
 269               <entry>set the output file suffix</entry>
 270               <entry>dynamic</entry>
 271               <entry>-</entry>
 272             </row>
 273             <row>
 274               <entry><option>-stubdir</option> <replaceable>dir</replaceable></entry>
 275               <entry>redirect FFi stub files</entry>
 276               <entry>dynamic</entry>
 277               <entry>-</entry>
 278             </row>
 279             <row>
 280               <entry><option>-outputdir</option> <replaceable>dir</replaceable></entry>
 281               <entry>set output directory</entry>
 282               <entry>dynamic</entry>
 283               <entry>-</entry>
 284             </row>
 285           </tbody>
 286         </tgroup>
 287       </informaltable>
 288     </sect2>
 289
 290     <sect2>
 291       <title>Keeping intermediate files</title>
 292
 293       <para><xref linkend="keeping-intermediates"/></para>
 294
 295       <informaltable>
 296         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 297           <thead>
 298             <row>
 299               <entry>Flag</entry>
 300               <entry>Description</entry>
 301               <entry>Static/Dynamic</entry>
 302               <entry>Reverse</entry>
 303             </row>
 304           </thead>
 305           <tbody>
 306             <row>
 307               <entry><option>-keep-hc-file</option> or
 308                  <option>-keep-hc-files</option></entry>
 309               <entry>retain intermediate <literal>.hc</literal> files</entry>
 310               <entry>dynamic</entry>
 311               <entry>-</entry>
 312             </row>
 313             <row>
 314               <entry><option>-keep-llvm-file</option> or
 315                  <option>-keep-llvm-files</option></entry>
 316               <entry>retain intermediate LLVM <literal>.ll</literal> files</entry>
 317               <entry>dynamic</entry>
 318               <entry>-</entry>
 319             </row>
 320             <row>
 321               <entry><option>-keep-s-file</option> or
 322                  <option>-keep-s-files</option></entry>
 323               <entry>retain intermediate <literal>.s</literal> files</entry>
 324               <entry>dynamic</entry>
 325               <entry>-</entry>
 326             </row>
 327             <row>
 328               <entry><option>-keep-raw-s-file</option> or
 329                  <option>-keep-raw-s-files</option></entry>
 330               <entry>retain intermediate <literal>.raw_s</literal> files</entry>
 331               <entry>dynamic</entry>
 332               <entry>-</entry>
 333             </row>
 334             <row>
 335               <entry><option>-keep-tmp-files</option></entry>
 336               <entry>retain all intermediate temporary files</entry>
 337               <entry>dynamic</entry>
 338               <entry>-</entry>
 339             </row>
 340           </tbody>
 341         </tgroup>
 342       </informaltable>
 343     </sect2>
 344
 345     <sect2>
 346       <title>Temporary files</title>
 347
 348       <para><xref linkend="temp-files"/></para>
 349
 350       <informaltable>
 351         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 352           <thead>
 353             <row>
 354               <entry>Flag</entry>
 355               <entry>Description</entry>
 356               <entry>Static/Dynamic</entry>
 357               <entry>Reverse</entry>
 358             </row>
 359           </thead>
 360           <tbody>
 361             <row>
 362               <entry><option>-tmpdir</option></entry>
 363               <entry>set the directory for temporary files</entry>
 364               <entry>dynamic</entry>
 365               <entry>-</entry>
 366             </row>
 367           </tbody>
 368         </tgroup>
 369       </informaltable>
 370     </sect2>
 371
 372     <sect2>
 373       <title>Finding imports</title>
 374
 375       <para><xref linkend="search-path"/></para>
 376
 377       <informaltable>
 378         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 379           <thead>
 380             <row>
 381               <entry>Flag</entry>
 382
 383               <entry>Description</entry>
 384               <entry>Static/Dynamic</entry>
 385               <entry>Reverse</entry>
 386             </row>
 387           </thead>
 388           <tbody>
 389             <row>
 390               <entry><option>-i</option><replaceable>dir1</replaceable>:<replaceable>dir2</replaceable>:...</entry>
 391               <entry>add <replaceable>dir</replaceable>,
 392                   <replaceable>dir2</replaceable>, etc. to import path</entry>
 393               <entry>static/<literal>:set</literal></entry>
 394               <entry>-</entry>
 395             </row>
 396             <row>
 397               <entry><option>-i</option></entry>
 398               <entry>Empty the import directory list</entry>
 399               <entry>static/<literal>:set</literal></entry>
 400               <entry>-</entry>
 401             </row>
 402           </tbody>
 403         </tgroup>
 404       </informaltable>
 405     </sect2>
 406
 407     <sect2>
 408       <title>Interface file options</title>
 409
 410       <para><xref linkend="hi-options"/></para>
 411
 412       <informaltable>
 413         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 414           <thead>
 415             <row>
 416               <entry>Flag</entry>
 417
 418               <entry>Description</entry>
 419               <entry>Static/Dynamic</entry>
 420               <entry>Reverse</entry>
 421             </row>
 422           </thead>
 423           <tbody>
 424             <row>
 425               <entry><option>-ddump-hi</option></entry>
 426               <entry>Dump the new interface to stdout</entry>
 427               <entry>dynamic</entry>
 428               <entry>-</entry>
 429             </row>
 430             <row>
 431               <entry><option>-ddump-hi-diffs</option></entry>
 432               <entry>Show the differences vs. the old interface</entry>
 433               <entry>dynamic</entry>
 434               <entry>-</entry>
 435             </row>
 436             <row>
 437               <entry><option>-ddump-minimal-imports</option></entry>
 438               <entry>Dump a minimal set of imports</entry>
 439               <entry>dynamic</entry>
 440               <entry>-</entry>
 441             </row>
 442             <row>
 443               <entry><option>--show-iface</option> <replaceable>file</replaceable></entry>
 444               <entry>See <xref linkend="modes"/>.</entry>
 445             </row>
 446           </tbody>
 447         </tgroup>
 448       </informaltable>
 449     </sect2>
 450
 451     <sect2>
 452       <title>Recompilation checking</title>
 453
 454       <para><xref linkend="recomp"/></para>
 455
 456       <informaltable>
 457         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 458           <thead>
 459             <row>
 460               <entry>Flag</entry>
 461
 462               <entry>Description</entry>
 463               <entry>Static/Dynamic</entry>
 464               <entry>Reverse</entry>
 465             </row>
 466           </thead>
 467           <tbody>
 468             <row>
 469               <entry><option>-fforce-recomp</option></entry>
 470               <entry>Turn off recompilation checking; implied by any
 471               <option>-ddump-X</option> option</entry>
 472               <entry>dynamic</entry>
 473               <entry><option>-fno-force-recomp</option></entry>
 474             </row>
 475           </tbody>
 476         </tgroup>
 477       </informaltable>
 478     </sect2>
 479
 480     <sect2 id="interactive-mode-options">
 481       <title>Interactive-mode options</title>
 482
 483       <para><xref linkend="ghci-dot-files"/></para>
 484
 485       <informaltable>
 486         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 487           <thead>
 488             <row>
 489               <entry>Flag</entry>
 490               <entry>Description</entry>
 491               <entry>Static/Dynamic</entry>
 492               <entry>Reverse</entry>
 493             </row>
 494           </thead>
 495           <tbody>
 496             <row>
 497               <entry><option>-ignore-dot-ghci</option></entry>
 498               <entry>Disable reading of <filename>.ghci</filename> files</entry>
 499               <entry>static</entry>
 500               <entry>-</entry>
 501             </row>
 502             <row>
 503               <entry><option>-read-dot-ghci</option></entry>
 504               <entry>Enable reading of <filename>.ghci</filename> files</entry>
 505               <entry>static</entry>
 506               <entry>-</entry>
 507             </row>
 508             <row>
 509               <entry><option>-fbreak-on-exception</option></entry>
 510               <entry><link linkend="ghci-debugger-exceptions">Break on any exception thrown</link></entry>
 511               <entry>dynamic</entry>
 512               <entry><option>-fno-break-on-exception</option></entry>
 513             </row>
 514             <row>
 515               <entry><option>-fbreak-on-error</option></entry>
 516               <entry><link linkend="ghci-debugger-exceptions">Break on uncaught exceptions and errors</link></entry>
 517               <entry>dynamic</entry>
 518               <entry><option>-fno-break-on-error</option></entry>
 519             </row>
 520             <row>
 521               <entry><option>-fprint-evld-with-show</option></entry>
 522               <entry><link linkend="breakpoints">Enable usage of Show instances in <literal>:print</literal></link></entry>
 523               <entry>dynamic</entry>
 524               <entry><option>-fno-print-evld-with-show</option></entry>
 525             </row>
 526             <row>
 527               <entry><option>-fprint-bind-result</option></entry>
 528               <entry><link linkend="ghci-stmts">Turn on printing of binding results in GHCi</link></entry>
 529               <entry>dynamic</entry>
 530               <entry><option>-fno-print-bind-result</option></entry>
 531             </row>
 532             <row>
 533               <entry><option>-fno-print-bind-contents</option></entry>
 534               <entry><link linkend="breakpoints">Turn off printing of binding contents in GHCi</link></entry>
 535               <entry>dynamic</entry>
 536               <entry>-</entry>
 537             </row>
 538             <row>
 539               <entry><option>-fno-implicit-import-qualified</option></entry>
 540               <entry><link linkend="ghci-import-qualified">Turn off
 541               implicit qualified import of everything in GHCi</link></entry>
 542               <entry>dynamic</entry>
 543               <entry>-</entry>
 544             </row>
 545
 546           </tbody>
 547         </tgroup>
 548       </informaltable>
 549     </sect2>
 550
 551     <sect2>
 552       <title>Packages</title>
 553
 554       <para><xref linkend="packages"/></para>
 555
 556       <informaltable>
 557         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 558           <thead>
 559             <row>
 560               <entry>Flag</entry>
 561               <entry>Description</entry>
 562               <entry>Static/Dynamic</entry>
 563               <entry>Reverse</entry>
 564             </row>
 565           </thead>
 566           <tbody>
 567             <row>
 568               <entry><option>-package-name</option> <replaceable>P</replaceable></entry>
 569               <entry>Compile to be part of package <replaceable>P</replaceable></entry>
 570               <entry>dynamic</entry>
 571               <entry>-</entry>
 572             </row>
 573             <row>
 574               <entry><option>-package</option> <replaceable>P</replaceable></entry>
 575               <entry>Expose package <replaceable>P</replaceable></entry>
 576               <entry>static/<literal>:set</literal></entry>
 577               <entry>-</entry>
 578             </row>
 579             <row>
 580               <entry><option>-hide-all-packages</option></entry>
 581               <entry>Hide all packages by default</entry>
 582               <entry>static</entry>
 583               <entry>-</entry>
 584             </row>
 585             <row>
 586               <entry><option>-hide-package</option> <replaceable>name</replaceable></entry>
 587               <entry>Hide package <replaceable>P</replaceable></entry>
 588               <entry>static/<literal>:set</literal></entry>
 589               <entry>-</entry>
 590             </row>
 591             <row>
 592               <entry><option>-ignore-package</option> <replaceable>name</replaceable></entry>
 593               <entry>Ignore package <replaceable>P</replaceable></entry>
 594               <entry>static/<literal>:set</literal></entry>
 595               <entry>-</entry>
 596             </row>
 597             <row>
 598               <entry><option>-package-conf</option> <replaceable>file</replaceable></entry>
 599               <entry>Load more packages from <replaceable>file</replaceable></entry>
 600               <entry>static</entry>
 601               <entry>-</entry>
 602             </row>
 603             <row>
 604               <entry><option>-no-user-package-conf</option></entry>
 605               <entry>Don't load the user's package config file.</entry>
 606               <entry>static</entry>
 607               <entry>-</entry>
 608             </row>
 609             <row>
 610               <entry><option>-no-auto-link-packages</option></entry>
 611               <entry>Don't automatically link in the haskell98 package.</entry>
 612               <entry>dynamic</entry>
 613               <entry>-</entry>
 614             </row>
 615           </tbody>
 616         </tgroup>
 617       </informaltable>
 618     </sect2>
 619
 620     <sect2>
 621       <title>Language options</title>
 622
 623       <para>Language options can be enabled either by a command-line option
 624       <option>-Xblah</option>, or by a <literal>{-# LANGUAGE blah #-}</literal>
 625       pragma in the file itself.  See <xref linkend="options-language"/></para>
 626
 627       <informaltable>
 628         <tgroup cols="4" align="left" colsep="1" rowsep="1">
 629           <thead>
 630             <row>
 631               <entry>Flag</entry>
 632               <entry>Description</entry>
 633               <entry>Static/Dynamic</entry>
 634               <entry>Reverse</entry>
 635             </row>
 636           </thead>
 637           <tbody>
 638             <row>
 639               <entry><option>-fglasgow-exts</option></entry>
 640               <entry>Enable most language extensions</entry>
 641               <entry>dynamic</entry>
 642               <entry><option>-fno-glasgow-exts</option></entry>
 643             </row>
 644             <row>
 645               <entry><option>-XOverlappingInstances</option></entry>
 646               <entry>Enable <link linkend="instance-overlap">overlapping instances</link></entry>
 647               <entry>dynamic</entry>
 648               <entry><option>-XNoOverlappingInstances</option></entry>
 649             </row>
 650             <row>
 651               <entry><option>-XIncoherentInstances</option></entry>
 652               <entry>Enable <link linkend="instance-overlap">incoherent instances</link>.
 653               Implies <option>-XOverlappingInstances</option> </entry>
 654               <entry>dynamic</entry>
 655               <entry><option>-XNoIncoherentInstances</option></entry>
 656             </row>
 657             <row>
 658               <entry><option>-XUndecidableInstances</option></entry>
 659               <entry>Enable <link linkend="undecidable-instances">undecidable instances</link></entry>
 660               <entry>dynamic</entry>
 661               <entry><option>-XNoUndecidableInstances</option></entry>
 662             </row>
 663             <row>
 664               <entry><option>-fcontext-stack=N</option><replaceable>n</replaceable></entry>
 665               <entry>set the <link linkend="undecidable-instances">limit for context reduction</link>. Default is 20.</entry>
 666               <entry>dynamic</entry>
 667               <entry></entry>
 668             </row>
 669             <row>
 670               <entry><option>-XArrows</option></entry>
 671               <entry>Enable <link linkend="arrow-notation">arrow
 672               notation</link> extension</entry>
 673               <entry>dynamic</entry>
 674               <entry><option>-XNoArrows</option></entry>
 675             </row>
 676             <row>
 677               <entry><option>-XDisambiguateRecordFields</option></entry>
 678               <entry>Enable <link linkend="disambiguate-fields">record
 679               field disambiguation</link></entry>
 680               <entry>dynamic</entry>
 681               <entry><option>-XNoDisambiguateRecordFields</option></entry>
 682             </row>
 683             <row>
 684               <entry><option>-XForeignFunctionInterface</option></entry>
 685               <entry>Enable <link linkend="ffi">foreign function interface</link> (implied by
 686               <option>-fglasgow-exts</option>)</entry>
 687               <entry>dynamic</entry>
 688               <entry><option>-XNoForeignFunctionInterface</option></entry>
 689             </row>
 690             <row>
 691               <entry><option>-XGenerics</option></entry>
 692               <entry>Enable <link linkend="generic-classes">generic classes</link></entry>
 693               <entry>dynamic</entry>
 694               <entry><option>-XNoGenerics</option></entry>
 695             </row>
 696             <row>
 697               <entry><option>-XImplicitParams</option></entry>
 698               <entry>Enable <link linkend="implicit-parameters">Implicit Parameters</link>.
 699               Implied by <option>-fglasgow-exts</option>.</entry>
 700               <entry>dynamic</entry>
 701               <entry><option>-XNoImplicitParams</option></entry>
 702             </row>
 703             <row>
 704               <entry><option>-firrefutable-tuples</option></entry>
 705               <entry>Make tuple pattern matching irrefutable</entry>
 706               <entry>dynamic</entry>
 707               <entry><option>-fno-irrefutable-tuples</option></entry>
 708             </row>
 709             <row>
 710               <entry><option>-XNoImplicitPrelude</option></entry>
 711               <entry>Don't implicitly <literal>import Prelude</literal></entry>
 712               <entry>dynamic</entry>
 713               <entry><option>-XImplicitPrelude</option></entry>
 714             </row>
 715             <row>
 716               <entry><option>-XNoMonomorphismRestriction</option></entry>
 717               <entry>Disable the <link linkend="monomorphism">monomorphism restriction</link></entry>
 718               <entry>dynamic</entry>
 719               <entry><option>-XMonomorphismRrestriction</option></entry>
 720             </row>
 721             <row>
 722               <entry><option>-XNoNPlusKPatterns</option></entry>
 723               <entry>Disable support for <literal>n+k</literal> patterns</entry>
 724               <entry>dynamic</entry>
 725               <entry><option>-XNPlusKPatterns</option></entry>
 726             </row>
 727             <row>
 728               <entry><option>-XNoMonoPatBinds</option></entry>
 729               <entry>Make <link linkend="monomorphism">pattern bindings polymorphic</link></entry>
 730               <entry>dynamic</entry>
 731               <entry><option>-XMonoPatBinds</option></entry>
 732             </row>
 733             <row>
 734               <entry><option>-XRelaxedPolyRec</option></entry>
 735               <entry>Relaxed checking for <link linkend="typing-binds">mutually-recursive polymorphic functions</link></entry>
 736               <entry>dynamic</entry>
 737               <entry><option>-XNoRelaxedPolyRec</option></entry>
 738             </row>
 739             <row>
 740               <entry><option>-XExtendedDefaultRules</option></entry>
 741               <entry>Use GHCi's <link linkend="extended-default-rules">extended default rules</link> in a normal module</entry>
 742               <entry>dynamic</entry>
 743               <entry><option>-XNoExtendedDefaultRules</option></entry>
 744             </row>
 745             <row>
 746               <entry><option>-XOverloadedStrings</option></entry>
 747               <entry>Enable <link linkend="overloaded-strings">overloaded string literals</link>.
 748               </entry>
 749               <entry>dynamic</entry>
 750               <entry><option>-XNoOverloadedStrings</option></entry>
 751             </row>
 752             <row>
 753               <entry><option>-XGADTs</option></entry>
 754               <entry>Enable <link linkend="gadt">generalised algebraic data types</link>.
 755               </entry>
 756               <entry>dynamic</entry>
 757               <entry><option>-XNoGADTs</option></entry>
 758             </row>
 759             <row>
 760               <entry><option>-XTypeFamilies</option></entry>
 761               <entry>Enable <link linkend="type-families">type families</link>.</entry>
 762               <entry>dynamic</entry>
 763               <entry><option>-XNoTypeFamilies</option></entry>
 764             </row>
 765             <row>
 766               <entry><option>-XScopedTypeVariables</option></entry>
 767               <entry>Enable <link linkend="scoped-type-variables">lexically-scoped type variables</link>.
 768               Implied by <option>-fglasgow-exts</option>.</entry>
 769               <entry>dynamic</entry>
 770               <entry><option>-XNoScopedTypeVariables</option></entry>
 771             </row>
 772             <row>
 773               <entry><option>-XMonoLocalBinds</option></entry>
 774               <entry>Enable <link linkend="mono-local-binds">do not generalise local bindings</link>.
 775               </entry>
 776               <entry>dynamic</entry>
 777               <entry><option>-XNoMonoLocalBinds</option></entry>
 778             </row>
 779             <row>
 780               <entry><option>-XTemplateHaskell</option></entry>
 781               <entry>Enable <link linkend="template-haskell">Template Haskell</link>.
 782                 No longer implied by <option>-fglasgow-exts</option>.</entry>
 783               <entry>dynamic</entry>
 784               <entry><option>-XNoTemplateHaskell</option></entry>
 785             </row>
 786             <row>
 787               <entry><option>-XQuasiQuotes</option></entry>
 788               <entry>Enable <link linkend="th-quasiquotation">quasiquotation</link>.</entry>
 789               <entry>dynamic</entry>
 790               <entry><option>-XNoQuasiQuotes</option></entry>
 791             </row>
 792             <row>
 793               <entry><option>-XBangPatterns</option></entry>
 794               <entry>Enable <link linkend="bang-patterns">bang patterns</link>.</entry>
 795               <entry>dynamic</entry>
 796               <entry><option>-XNoBangPatterns</option></entry>
 797             </row>
 798             <row>
 799               <entry><option>-XCPP</option></entry>
 800               <entry>Enable the <link linkend="c-pre-processor">C preprocessor</link>.</entry>
 801               <entry>dynamic</entry>
 802               <entry><option>-XNoCPP</option></entry>
 803             </row>
 804             <row>
 805               <entry><option>-XPatternGuards</option></entry>
 806               <entry>Enable <link linkend="pattern-guards">pattern guards</link>.</entry>
 807               <entry>dynamic</entry>
 808               <entry><option>-XNoPatternGuards</option></entry>
 809             </row>
 810             <row>
 811               <entry><option>-XViewPatterns</option></entry>
 812               <entry>Enable <link linkend="view-patterns">view patterns</link>.</entry>
 813               <entry>dynamic</entry>
 814               <entry><option>-XNoViewPatterns</option></entry>
 815             </row>
 816             <row>
 817               <entry><option>-XUnicodeSyntax</option></entry>
 818               <entry>Enable <link linkend="unicode-syntax">unicode syntax</link>.</entry>
 819               <entry>dynamic</entry>
 820               <entry><option>-XNoUnicodeSyntax</option></entry>
 821             </row>
 822             <row>
 823               <entry><option>-XMagicHash</option></entry>
 824               <entry>Allow "#" as a <link linkend="magic-hash">postfix modifier on identifiers</link>.</entry>
 825               <entry>dynamic</entry>
 826               <entry><option>-XNoMagicHash</option></entry>
 827             </row>
 828             <row>
 829               <entry><option>-XNewQualifiedOperators</option></entry>
 830               <entry>Enable <link linkend="new-qualified-operators">new
 831               qualified operator syntax</link></entry>
 832               <entry>dynamic</entry>
 833               <entry><option>-XNoNewQualifiedOperators</option></entry>
 834             </row>
 835             <row>
 836               <entry><option>-XExplicitForALl</option></entry>
 837               <entry>Enable <link linkend="explicit-foralls">explicit universal quantification</link>.
 838               Implied by <option>-XScopedTypeVariables</option>,
 839             <option>-XLiberalTypeSynonyms</option>,
 840             <option>-XRank2Types</option>,
 841             <option>-XRankNTypes</option>,
 842             <option>-XPolymorphicComponents</option>,
 843             <option>-XExistentialQuantification</option>
 844               </entry>
 845               <entry>dynamic</entry>
 846               <entry><option>-XNoExplicitForAll</option></entry>
 847             </row>
 848             <row>
 849               <entry><option>-XPolymorphicComponents</option></entry>
 850               <entry>Enable <link linkend="universal-quantification">polymorphic components for data constructors</link>.</entry>
 851               <entry>dynamic</entry>
 852               <entry><option>-XNoPolymorphicComponents</option></entry>
 853             </row>
 854             <row>
 855               <entry><option>-XRank2Types</option></entry>
 856               <entry>Enable <link linkend="universal-quantification">rank-2 types</link>.</entry>
 857               <entry>dynamic</entry>
 858               <entry><option>-XNoRank2Types</option></entry>
 859             </row>
 860             <row>
 861               <entry><option>-XRankNTypes</option></entry>
 862               <entry>Enable <link linkend="universal-quantification">rank-N types</link>.</entry>
 863               <entry>dynamic</entry>
 864               <entry><option>-XNoRankNTypes</option></entry>
 865             </row>
 866             <row>
 867               <entry><option>-XImpredicativeTypes</option></entry>
 868               <entry>Enable <link linkend="impredicative-polymorphism">impredicative types</link>.</entry>
 869               <entry>dynamic</entry>
 870               <entry><option>-XNoImpredicativeTypes</option></entry>
 871             </row>
 872             <row>
 873               <entry><option>-XExistentialQuantification</option></entry>
 874               <entry>Enable <link linkend="existential-quantification">existential quantification</link>.</entry>
 875               <entry>dynamic</entry>
 876               <entry><option>-XNoExistentialQuantification</option></entry>
 877             </row>
 878             <row>
 879               <entry><option>-XKindSignatures</option></entry>
 880               <entry>Enable <link linkend="kinding">kind signatures</link>.</entry>
 881               <entry>dynamic</entry>
 882               <entry><option>-XNoKindSignatures</option></entry>
 883             </row>
 884             <row>
 885               <entry><option>-XEmptyDataDecls</option></entry>
 886               <entry>Enable empty data declarations.</entry>
 887               <entry>dynamic</entry>
 888               <entry><option>-XNoEmptyDataDecls</option></entry>
 889             </row>
 890             <row>
 891               <entry><option>-XParallelListComp</option></entry>
 892               <entry>Enable <link linkend="parallel-list-comprehensions">parallel list comprehensions</link>.</entry>
 893               <entry>dynamic</entry>
 894               <entry><option>-XNoParallelListComp</option></entry>
 895             </row>
 896             <row>
 897               <entry><option>-XTransformListComp</option></entry>
 898               <entry>Enable <link linkend="generalised-list-comprehensions">generalised list comprehensions</link>.</entry>
 899               <entry>dynamic</entry>
 900               <entry><option>-XNoTransformListComp</option></entry>
 901             </row>
 902             <row>
 903               <entry><option>-XUnliftedFFITypes</option></entry>
 904               <entry>Enable unlifted FFI types.</entry>
 905               <entry>dynamic</entry>
 906               <entry><option>-XNoUnliftedFFITypes</option></entry>
 907             </row>
 908             <row>
 909               <entry><option>-XLiberalTypeSynonyms</option></entry>
 910               <entry>Enable <link linkend="type-synonyms">liberalised type synonyms</link>.</entry>
 911               <entry>dynamic</entry>
 912               <entry><option>-XNoLiberalTypeSynonyms</option></entry>
 913             </row>
 914             <row>
 915               <entry><option>-XTypeOperators</option></entry>
 916               <entry>Enable type operators.</entry>
 917               <entry>dynamic</entry>
 918               <entry><option>-XNoTypeOperators</option></entry>
 919             </row>
 920             <row>
 921               <entry><option>-XDoRec</option></entry>
 922               <entry>Enable <link linkend="recursive-do-notation">recursive do notation</link>.</entry>
 923               <entry>dynamic</entry>
 924               <entry><option>-XNoDoRec</option></entry>
 925             </row>
 926             <row>
 927               <entry><option>-XRecursiveDo</option></entry>
 928               <entry>Enable <link linkend="mdo-notation">recursive do (mdo) notation</link>. This is deprecated; please use <link linkend="recursive-do-notation">recursive do notation</link> instead.</entry>
 929               <entry>dynamic</entry>
 930               <entry><option>-XNoRecursiveDo</option></entry>
 931             </row>
 932             <row>
 933               <entry><option>-XPArr</option></entry>
 934               <entry>Enable parallel arrays.</entry>
 935               <entry>dynamic</entry>
 936               <entry><option>-XNoPArr</option></entry>
 937             </row>
 938             <row>
 939               <entry><option>-XRecordWildCards</option></entry>
 940               <entry>Enable <link linkend="record-wildcards">record wildcards</link>.</entry>
 941               <entry>dynamic</entry>
 942               <entry><option>-XNoRecordWildCards</option></entry>
 943             </row>
 944             <row>
 945               <entry><option>-XNamedFieldPuns</option></entry>
 946               <entry>Enable <link linkend="record-puns">record puns</link>.</entry>
 947               <entry>dynamic</entry>
 948               <entry><option>-XNoNamedFieldPuns</option></entry>
 949             </row>
 950             <row>
 951               <entry><option>-XDisambiguateRecordFields</option></entry>
 952               <entry>Enable  <link linkend="disambiguate-fields">record field disambiguation</link>. </entry>
 953               <entry>dynamic</entry>
 954               <entry><option>-XNoDisambiguateRecordFields</option></entry>
 955             </row>
 956             <row>
 957               <entry><option>-XUnboxedTuples</option></entry>
 958               <entry>Enable <link linkend="unboxed-tuples">unboxed tuples</link>.</entry>
 959               <entry>dynamic</entry>
 960               <entry><option>-XNoUnboxedTuples</option></entry>
 961             </row>
 962             <row>
 963               <entry><option>-XStandaloneDeriving</option></entry>
 964               <entry>Enable <link linkend="stand-alone-deriving">standalone deriving</link>.</entry>
 965               <entry>dynamic</entry>
 966               <entry><option>-XNoStandaloneDeriving</option></entry>
 967             </row>
 968             <row>
 969               <entry><option>-XDeriveDataTypeable</option></entry>
 970               <entry>Enable <link linkend="deriving-typeable">deriving for the Data and Typeable classes</link>.</entry>
 971               <entry>dynamic</entry>
 972               <entry><option>-XNoDeriveDataTypeable</option></entry>
 973             </row>
 974             <row>
 975               <entry><option>-XGeneralizedNewtypeDeriving</option></entry>
 976               <entry>Enable <link linkend="newtype-deriving">newtype deriving</link>.</entry>
 977               <entry>dynamic</entry>
 978               <entry><option>-XNoGeneralizedNewtypeDeriving</option></entry>
 979             </row>
 980             <row>
 981               <entry><option>-XTypeSynonymInstances</option></entry>
 982               <entry>Enable <link linkend="flexible-instance-head">type synonyms in instance heads</link>.</entry>
 983               <entry>dynamic</entry>
 984               <entry><option>-XNoTypeSynonymInstances</option></entry>
 985             </row>
 986             <row>
 987               <entry><option>-XFlexibleContexts</option></entry>
 988               <entry>Enable <link linkend="flexible-contexts">flexible contexts</link>.</entry>
 989               <entry>dynamic</entry>
 990               <entry><option>-XNoFlexibleContexts</option></entry>
 991             </row>
 992             <row>
 993               <entry><option>-XFlexibleInstances</option></entry>
 994               <entry>Enable <link linkend="instance-rules">flexible instances</link>.</entry>
 995               <entry>dynamic</entry>
 996               <entry><option>-XNoFlexibleInstances</option></entry>
 997             </row>
 998             <row>
 999               <entry><option>-XConstrainedClassMethods</option></entry>
1000               <entry>Enable <link linkend="class-method-types">constrained class methods</link>.</entry>
1001               <entry>dynamic</entry>
1002               <entry><option>-XNoConstrainedClassMethods</option></entry>
1003             </row>
1004             <row>
1005               <entry><option>-XMultiParamTypeClasses</option></entry>
1006               <entry>Enable <link linkend="multi-param-type-classes">multi parameter type classes</link>.</entry>
1007               <entry>dynamic</entry>
1008               <entry><option>-XNoMultiParamTypeClasses</option></entry>
1009             </row>
1010             <row>
1011               <entry><option>-XFunctionalDependencies</option></entry>
1012               <entry>Enable <link linkend="functional-dependencies">functional dependencies</link>.</entry>
1013               <entry>dynamic</entry>
1014               <entry><option>-XNoFunctionalDependencies</option></entry>
1015             </row>
1016             <row>
1017               <entry><option>-XPackageImports</option></entry>
1018               <entry>Enable <link linkend="package-imports">package-qualified imports</link>.</entry>
1019               <entry>dynamic</entry>
1020               <entry><option>-XNoPackageImports</option></entry>
1021             </row>
1022           </tbody>
1023         </tgroup>
1024       </informaltable>
1025     </sect2>
1026
1027     <sect2>
1028       <title>Warnings</title>
1029
1030       <para><xref linkend="options-sanity"/></para>
1031
1032     <informaltable>
1033       <tgroup cols="4" align="left" colsep="1" rowsep="1">
1034         <thead>
1035           <row>
1036             <entry>Flag</entry>
1037             <entry>Description</entry>
1038             <entry>Static/Dynamic</entry>
1039             <entry>Reverse</entry>
1040           </row>
1041         </thead>
1042         <tbody>
1043           <row>
1044             <entry><option>-W</option></entry>
1045             <entry>enable normal warnings</entry>
1046             <entry>dynamic</entry>
1047             <entry><option>-w</option></entry>
1048           </row>
1049           <row>
1050             <entry><option>-w</option></entry>
1051             <entry>disable all warnings</entry>
1052             <entry>dynamic</entry>
1053             <entry>-</entry>
1054           </row>
1055           <row>
1056             <entry><option>-Wall</option></entry>
1057             <entry>enable almost all warnings (details in <xref linkend="options-sanity"/>)</entry>
1058             <entry>dynamic</entry>
1059             <entry><option>-w</option></entry>
1060           </row>
1061           <row>
1062             <entry><option>-Werror</option></entry>
1063             <entry>make warnings fatal</entry>
1064             <entry>dynamic</entry>
1065             <entry>-Wwarn</entry>
1066           </row>
1067           <row>
1068             <entry><option>-Wwarn</option></entry>
1069             <entry>make warnings non-fatal</entry>
1070             <entry>dynamic</entry>
1071             <entry>-Werror</entry>
1072           </row>
1073
1074           <row>
1075             <entry><option>-fwarn-unrecognised-pragmas</option></entry>
1076             <entry>warn about uses of pragmas that GHC doesn't recognise</entry>
1077             <entry>dynamic</entry>
1078             <entry><option>-fno-warn-unrecognised-pragmas</option></entry>
1079           </row>
1080
1081           <row>
1082             <entry><option>-fwarn-warnings-deprecations</option></entry>
1083             <entry>warn about uses of functions &amp; types that have warnings or deprecated pragmas</entry>
1084             <entry>dynamic</entry>
1085             <entry><option>-fno-warn-warnings-deprecations</option></entry>
1086           </row>
1087
1088           <row>
1089             <entry><option>-fwarn-deprecated-flags</option></entry>
1090             <entry>warn about uses of commandline flags that are deprecated</entry>
1091             <entry>dynamic</entry>
1092             <entry><option>-fno-warn-deprecated-flags</option></entry>
1093           </row>
1094
1095           <row>
1096             <entry><option>-fwarn-duplicate-exports</option></entry>
1097             <entry>warn when an entity is exported multiple times</entry>
1098             <entry>dynamic</entry>
1099             <entry><option>-fno-warn-duplicate-exports</option></entry>
1100           </row>
1101
1102           <row>
1103             <entry><option>-fwarn-hi-shadowing</option></entry>
1104             <entry>warn when a <literal>.hi</literal> file in the
1105             current directory shadows a library</entry>
1106             <entry>dynamic</entry>
1107             <entry><option>-fno-warn-hi-shadowing</option></entry>
1108           </row>
1109
1110           <row>
1111             <entry><option>-fwarn-implicit-prelude</option></entry>
1112             <entry>warn when the Prelude is implicitly imported</entry>
1113             <entry>dynamic</entry>
1114             <entry><option>-fno-warn-implicit-prelude</option></entry>
1115           </row>
1116
1117           <row>
1118             <entry><option>-fwarn-incomplete-patterns</option></entry>
1119             <entry>warn when a pattern match could fail</entry>
1120             <entry>dynamic</entry>
1121             <entry><option>-fno-warn-incomplete-patterns</option></entry>
1122           </row>
1123
1124           <row>
1125             <entry><option>-fwarn-incomplete-record-updates</option></entry>
1126             <entry>warn when a record update could fail</entry>
1127             <entry>dynamic</entry>
1128             <entry><option>-fno-warn-incomplete-record-updates</option></entry>
1129           </row>
1130
1131           <row>
1132             <entry><option>-fwarn-missing-fields</option></entry>
1133             <entry>warn when fields of a record are uninitialised</entry>
1134             <entry>dynamic</entry>
1135             <entry><option>-fno-warn-missing-fields</option></entry>
1136           </row>
1137
1138           <row>
1139             <entry><option>-fwarn-missing-import-lists</option></entry>
1140             <entry>warn when explicit imports lack an import list</entry>
1141             <entry>dynamic</entry>
1142             <entry><option>-fnowarn-missing-import-lists</option></entry>
1143           </row>
1144
1145           <row>
1146             <entry><option>-fwarn-missing-methods</option></entry>
1147             <entry>warn when class methods are undefined</entry>
1148             <entry>dynamic</entry>
1149             <entry><option>-fno-warn-missing-methods</option></entry>
1150           </row>
1151
1152           <row>
1153             <entry><option>-fwarn-missing-signatures</option></entry>
1154             <entry>warn about top-level functions without signatures</entry>
1155             <entry>dynamic</entry>
1156             <entry><option>-fno-warn-missing-signatures</option></entry>
1157           </row>
1158
1159           <row>
1160             <entry><option>-fwarn-name-shadowing</option></entry>
1161             <entry>warn when names are shadowed</entry>
1162             <entry>dynamic</entry>
1163             <entry><option>-fno-warn-name-shadowing</option></entry>
1164           </row>
1165
1166           <row>
1167             <entry><option>-fwarn-orphans</option></entry>
1168             <entry>warn when the module contains <link linkend="orphan-modules">orphan instance declarations
1169             or rewrite rules</link></entry>
1170             <entry>dynamic</entry>
1171             <entry><option>-fno-warn-orphans</option></entry>
1172           </row>
1173
1174           <row>
1175             <entry><option>-fwarn-overlapping-patterns</option></entry>
1176             <entry>warn about overlapping patterns</entry>
1177             <entry>dynamic</entry>
1178             <entry><option>-fno-warn-overlapping-patterns</option></entry>
1179           </row>
1180
1181           <row>
1182             <entry><option>-fwarn-tabs</option></entry>
1183             <entry>warn if there are tabs in the source file</entry>
1184             <entry>dynamic</entry>
1185             <entry><option>-fno-warn-tabs</option></entry>
1186           </row>
1187
1188           <row>
1189             <entry><option>-fwarn-type-defaults</option></entry>
1190             <entry>warn when defaulting happens</entry>
1191             <entry>dynamic</entry>
1192             <entry><option>-fno-warn-type-defaults</option></entry>
1193           </row>
1194
1195           <row>
1196             <entry><option>-fwarn-monomorphism-restriction</option></entry>
1197             <entry>warn when the Monomorphism Restriction is applied</entry>
1198             <entry>dynamic</entry>
1199             <entry><option>-fno-warn-monomorphism-restriction</option></entry>
1200           </row>
1201
1202           <row>
1203             <entry><option>-fwarn-unused-binds</option></entry>
1204             <entry>warn about bindings that are unused</entry>
1205             <entry>dynamic</entry>
1206             <entry><option>-fno-warn-unused-binds</option></entry>
1207           </row>
1208
1209           <row>
1210             <entry><option>-fwarn-unused-imports</option></entry>
1211             <entry>warn about unnecessary imports</entry>
1212             <entry>dynamic</entry>
1213             <entry><option>-fno-warn-unused-imports</option></entry>
1214           </row>
1215
1216           <row>
1217             <entry><option>-fwarn-unused-matches</option></entry>
1218             <entry>warn about variables in patterns that aren't used</entry>
1219             <entry>dynamic</entry>
1220             <entry><option>-fno-warn-unused-matches</option></entry>
1221           </row>
1222
1223           <row>
1224             <entry><option>-fwarn-unused-do-bind</option></entry>
1225             <entry>warn about do bindings that appear to throw away values of types other than <literal>()</literal></entry>
1226             <entry>dynamic</entry>
1227             <entry><option>-fno-warn-unused-do-bind</option></entry>
1228           </row>
1229
1230           <row>
1231             <entry><option>-fwarn-wrong-do-bind</option></entry>
1232             <entry>warn about do bindings that appear to throw away monadic values that you should have bound instead</entry>
1233             <entry>dynamic</entry>
1234             <entry><option>-fno-warn-wrong-do-bind</option></entry>
1235           </row>
1236
1237           </tbody>
1238         </tgroup>
1239       </informaltable>
1240
1241     </sect2>
1242     <sect2>
1243       <title>Optimisation levels</title>
1244
1245       <para><xref linkend="options-optimise"/></para>
1246
1247       <informaltable>
1248         <tgroup cols="4" align="left" colsep="1" rowsep="1">
1249           <thead>
1250             <row>
1251               <entry>Flag</entry>
1252               <entry>Description</entry>
1253               <entry>Static/Dynamic</entry>
1254               <entry>Reverse</entry>
1255             </row>
1256           </thead>
1257           <tbody>
1258             <row>
1259               <entry><option>-O</option></entry>
1260               <entry>Enable default optimisation (level 1)</entry>
1261               <entry>dynamic</entry>
1262               <entry><option>-O0</option></entry>
1263             </row>
1264             <row>
1265               <entry><option>-O</option><replaceable>n</replaceable></entry>
1266               <entry>Set optimisation level <replaceable>n</replaceable></entry>
1267               <entry>dynamic</entry>
1268               <entry><option>-O0</option></entry>
1269             </row>
1270           </tbody>
1271         </tgroup>
1272       </informaltable>
1273
1274     </sect2>
1275     <sect2>
1276       <title>Individual optimisations</title>
1277
1278       <para><xref linkend="options-f"/></para>
1279
1280       <informaltable>
1281         <tgroup cols="4" align="left" colsep="1" rowsep="1">
1282           <thead>
1283             <row>
1284               <entry>Flag</entry>
1285               <entry>Description</entry>
1286               <entry>Static/Dynamic</entry>
1287               <entry>Reverse</entry>
1288             </row>
1289           </thead>
1290           <tbody>
1291             <row>
1292               <entry><option>-fcase-merge</option></entry>
1293               <entry>Enable case-merging. Implied by <option>-O</option>.</entry>
1294               <entry>dynamic</entry>
1295               <entry><option>-fno-case-merge</option></entry>
1296             </row>
1297
1298             <row>
1299               <entry><option>-fdicts-strict</option></entry>
1300               <entry>Make dictionaries strict</entry>
1301               <entry>static</entry>
1302               <entry><option>-fno-dicts-strict</option></entry>
1303             </row>
1304
1305             <row>
1306               <entry><option>-fmethod-sharing</option></entry>
1307               <entry>Share specialisations of overloaded functions (default)</entry>
1308               <entry>dynamic</entry>
1309               <entry><option>-fno-method-sharing</option></entry>
1310             </row>
1311
1312             <row>
1313               <entry><option>-fdo-eta-reduction</option></entry>
1314               <entry>Enable eta-reduction. Implied by <option>-O</option>.</entry>
1315               <entry>dynamic</entry>
1316               <entry><option>-fno-do-eta-reduction</option></entry>
1317             </row>
1318
1319             <row>
1320               <entry><option>-fdo-lambda-eta-expansion</option></entry>
1321               <entry>Enable lambda eta-reduction</entry>
1322               <entry>dynamic</entry>
1323               <entry><option>-fno-do-lambda-eta-expansion</option></entry>
1324             </row>
1325
1326             <row>
1327               <entry><option>-fexcess-precision</option></entry>
1328               <entry>Enable excess intermediate precision</entry>
1329               <entry>dynamic</entry>
1330               <entry><option>-fno-excess-precision</option></entry>
1331             </row>
1332
1333             <row>
1334               <entry><option>-fignore-asserts</option></entry>
1335               <entry>Ignore assertions in the source</entry>
1336               <entry>dynamic</entry>
1337               <entry><option>-fno-ignore-asserts</option></entry>
1338             </row>
1339
1340             <row>
1341               <entry><option>-fignore-interface-pragmas</option></entry>
1342               <entry>Ignore pragmas in interface files</entry>
1343               <entry>dynamic</entry>
1344               <entry><option>-fno-ignore-interface-pragmas</option></entry>
1345             </row>
1346
1347             <row>
1348               <entry><option>-fomit-interface-pragmas</option></entry>
1349               <entry>Don't generate interface pragmas</entry>
1350               <entry>dynamic</entry>
1351               <entry><option>-fno-omit-interface-pragmas</option></entry>
1352             </row>
1353
1354             <row>
1355               <entry><option>-fmax-worker-args</option></entry>
1356               <entry>If a worker has that many arguments, none will be
1357                 unpacked anymore (default: 10)</entry>
1358               <entry>static</entry>
1359               <entry>-</entry>
1360             </row>
1361
1362             <row>
1363               <entry><option>-fsimplifier-phases</option></entry>
1364               <entry>Set the number of phases for the simplifier (default 2).
1365               Ignored with <option>-O0</option>.</entry>
1366               <entry>dynamic</entry>
1367               <entry>-</entry>
1368             </row>
1369
1370             <row>
1371               <entry><option>-fmax-simplifier-iterations</option></entry>
1372               <entry>Set the max iterations for the simplifier</entry>
1373               <entry>dynamic</entry>
1374               <entry>-</entry>
1375             </row>
1376
1377             <row>
1378               <entry><option>-fno-state-hack</option></entry>
1379               <entry>Turn off the "state hack" whereby any lambda with a real-world state token
1380               as argument is considered to be single-entry.  Hence OK to inline things inside it.</entry>
1381               <entry>static</entry>
1382               <entry>-</entry>
1383             </row>
1384
1385             <row>
1386               <entry><option>-fcse</option></entry>
1387               <entry>Turn on common sub-expression elimination. Implied by <option>-O</option>.</entry>
1388               <entry>dynamic</entry>
1389               <entry>-fno-cse</entry>
1390             </row>
1391
1392             <row>
1393               <entry><option>-fspecialise</option></entry>
1394               <entry>Turn on specialisation of overloaded functions. Implied by <option>-O</option>.</entry>
1395               <entry>dynamic</entry>
1396               <entry>-fno-specialise</entry>
1397             </row>
1398
1399             <row>
1400               <entry><option>-ffull-laziness</option></entry>
1401               <entry>Turn on full laziness (floating bindings outwards). Implied by <option>-O</option>.</entry>
1402               <entry>dynamic</entry>
1403               <entry>-fno-full-laziness</entry>
1404             </row>
1405
1406             <row>
1407               <entry><option>-ffloat-in</option></entry>
1408               <entry>Turn on the float-in transformation. Implied by <option>-O</option>.</entry>
1409               <entry>dynamic</entry>
1410               <entry>-fno-float-in</entry>
1411             </row>
1412
1413             <row>
1414               <entry><option>-fenable-rewrite-rules</option></entry>
1415               <entry>Switch on all rewrite rules (including rules
1416               generated by automatic specialisation of overloaded functions).
1417               Implied by <option>-O</option>. </entry>
1418               <entry>dynamic</entry>
1419               <entry><option>-fno-enable-rewrite-rules</option></entry>
1420             </row>
1421
1422             <row>
1423               <entry><option>-fstrictness</option></entry>
1424               <entry>Turn on strictness analysis. Implied by <option>-O</option>.</entry>
1425               <entry>dynamic</entry>
1426               <entry>-fno-strictness</entry>
1427             </row>
1428
1429             <row>
1430               <entry><option>-fstrictness=before</option>=<replaceable>n</replaceable></entry>
1431               <entry>Run an additional strictness analysis before simplifier
1432 phase <replaceable>n</replaceable></entry>
1433               <entry>dynamic</entry>
1434               <entry>-</entry>
1435             </row>
1436
1437             <row>
1438               <entry><option>-fspec-constr</option></entry>
1439               <entry>Turn on the SpecConstr transformation. Implied by <option>-O2</option>.</entry>
1440               <entry>dynamic</entry>
1441               <entry>-fno-spec-constr</entry>
1442             </row>
1443
1444             <row>
1445               <entry><option>-fspec-constr-threshold</option>=<replaceable>n</replaceable></entry>
1446               <entry>Set the size threshold for the SpecConstr transformation to <replaceable>n</replaceable> (default: 200)</entry>
1447               <entry>static</entry>
1448               <entry><option>-fno-spec-constr-threshold</option></entry>
1449             </row>
1450
1451             <row>
1452               <entry><option>-fspec-constr-count</option>=<replaceable>n</replaceable></entry>
1453               <entry>Set to <replaceable>n</replaceable> (default: 3) the maximum number of
1454                 specialisations that will be created for any one function
1455                 by the SpecConstr transformation</entry>
1456               <entry>static</entry>
1457               <entry><option>-fno-spec-constr-count</option></entry>
1458             </row>
1459
1460             <row>
1461               <entry><option>-fliberate-case</option></entry>
1462               <entry>Turn on the liberate-case transformation. Implied by <option>-O2</option>.</entry>
1463               <entry>dynamic</entry>
1464               <entry>-fno-liberate-case</entry>
1465             </row>
1466
1467             <row>
1468               <entry><option>-fstatic-argument-transformation</option></entry>
1469               <entry>Turn on the static argument transformation. Implied by <option>-O2</option>.</entry>
1470               <entry>dynamic</entry>
1471               <entry>-fno-static-argument-transformation</entry>
1472             </row>
1473
1474             <row>
1475               <entry><option>-fliberate-case-threshold</option>=<replaceable>n</replaceable></entry>
1476               <entry>Set the size threshold for the liberate-case transformation to <replaceable>n</replaceable> (default: 200)</entry>
1477               <entry>static</entry>
1478               <entry><option>-fno-liberate-case-threshold</option></entry>
1479             </row>
1480
1481             <row>
1482               <entry><option>-funbox-strict-fields</option></entry>
1483               <entry>Flatten strict constructor fields</entry>
1484               <entry>dynamic</entry>
1485               <entry><option>-fno-unbox-strict-fields</option></entry>
1486             </row>
1487
1488             <row>
1489               <entry><option>-funfolding-creation-threshold</option></entry>
1490               <entry>Tweak unfolding settings</entry>
1491               <entry>static</entry>
1492               <entry><option>-fno-unfolding-creation-threshold</option></entry>
1493             </row>
1494
1495             <row>
1496               <entry><option>-funfolding-fun-discount</option></entry>
1497               <entry>Tweak unfolding settings</entry>
1498               <entry>static</entry>
1499               <entry><option>-fno-unfolding-fun-discount</option></entry>
1500             </row>
1501
1502             <row>
1503               <entry><option>-funfolding-keeness-factor</option></entry>
1504               <entry>Tweak unfolding settings</entry>
1505               <entry>static</entry>
1506               <entry><option>-fno-unfolding-keeness-factor</option></entry>
1507             </row>
1508
1509             <row>
1510               <entry><option>-funfolding-use-threshold</option></entry>
1511               <entry>Tweak unfolding settings</entry>
1512               <entry>static</entry>
1513               <entry><option>-fno-unfolding-use-threshold</option></entry>
1514             </row>
1515
1516             <row>
1517               <entry><option>-fno-pre-inlining</option></entry>
1518               <entry>Turn off pre-inlining</entry>
1519               <entry>static</entry>
1520               <entry>-</entry>
1521             </row>
1522
1523             <row>
1524               <entry><option>-feager-blackholing</option></entry>
1525               <entry>Turn on <link linkend="parallel-compile-options">eager blackholing</link></entry>
1526               <entry>dynamic</entry>
1527               <entry>-</entry>
1528             </row>
1529           </tbody>
1530         </tgroup>
1531       </informaltable>
1532     </sect2>
1533
1534     <sect2>
1535       <title>Profiling options</title>
1536
1537       <para><xref linkend="profiling"/></para>
1538
1539       <informaltable>
1540         <tgroup cols="4" align="left" colsep="1" rowsep="1">
1541           <thead>
1542             <row>
1543               <entry>Flag</entry>
1544               <entry>Description</entry>
1545               <entry>Static/Dynamic</entry>
1546               <entry>Reverse</entry>
1547             </row>
1548           </thead>
1549           <tbody>
1550             <row>
1551               <entry><option>-auto</option></entry>
1552               <entry>Auto-add <literal>_scc_</literal>s to all
1553               exported functions not marked INLINE</entry>
1554               <entry>dynamic</entry>
1555               <entry><option>-no-auto</option></entry>
1556             </row>
1557             <row>
1558               <entry><option>-auto-all</option></entry>
1559               <entry>Auto-add <literal>_scc_</literal>s to all
1560               top-level functions not marked INLINE</entry>
1561               <entry>dynamic</entry>
1562               <entry><option>-no-auto-all</option></entry>
1563             </row>
1564             <row>
1565               <entry><option>-caf-all</option></entry>
1566               <entry>Auto-add <literal>_scc_</literal>s to all CAFs</entry>
1567               <entry>dynamic</entry>
1568               <entry><option>-no-caf-all</option></entry>
1569             </row>
1570             <row>
1571               <entry><option>-prof</option></entry>
1572               <entry>Turn on profiling</entry>
1573               <entry>static</entry>
1574               <entry>-</entry>
1575             </row>
1576             <row>
1577               <entry><option>-ticky</option></entry>
1578               <entry><link linkend="ticky-ticky">Turn on ticky-ticky profiling</link></entry>
1579               <entry>static</entry>
1580               <entry>-</entry>
1581             </row>
1582           </tbody>
1583         </tgroup>
1584       </informaltable>
1585     </sect2>
1586
1587     <sect2>
1588       <title>Program coverage options</title>
1589
1590       <para><xref linkend="hpc"/></para>
1591
1592       <informaltable>
1593         <tgroup cols="4" align="left" colsep="1" rowsep="1">
1594           <thead>
1595             <row>
1596               <entry>Flag</entry>
1597               <entry>Description</entry>
1598               <entry>Static/Dynamic</entry>
1599               <entry>Reverse</entry>
1600             </row>
1601           </thead>
1602           <tbody>
1603             <row>
1604               <entry><option>-fhpc</option></entry>
1605               <entry>Turn on Haskell program coverage instrumentation</entry>
1606               <entry>static</entry>
1607               <entry><option>-</option></entry>
1608             </row>
1609             <row>
1610               <entry><option>-hpcdir dir</option></entry>
1611               <entry>Directory to deposit .mix files during compilation (default is .hpc)</entry>
1612               <entry>dynamic</entry>
1613               <entry><option>-</option></entry>
1614             </row>
1615           </tbody>
1616         </tgroup>
1617       </informaltable>
1618     </sect2>
1619
1620     <sect2>
1621       <title>Haskell pre-processor options</title>
1622
1623       <para><xref linkend="pre-processor"/></para>
1624
1625       <informaltable>
1626         <tgroup cols="4" align="left" colsep="1" rowsep="1">
1627           <thead>
1628             <row>
1629               <entry>Flag</entry>
1630               <entry>Description</entry>
1631               <entry>Static/Dynamic</entry>
1632               <entry>Reverse</entry>
1633             </row>
1634           </thead>
1635           <tbody>
1636             <row>
1637               <entry><option>-F</option></entry>
1638               <entry>
1639                   Enable the use of a pre-processor
1640                   (set with <option>-pgmF</option>)
1641               </entry>
1642               <entry>dynamic</entry>
1643               <entry>-</entry>
1644             </row>
1645           </tbody>
1646         </tgroup>
1647       </informaltable>
1648     </sect2>
1649
1650     <sect2>
1651       <title>C pre-processor options</title>
1652
1653       <para><xref linkend="c-pre-processor"/></para>
1654
1655       <informaltable>
1656         <tgroup cols="4" align="left" colsep="1" rowsep="1">
1657           <thead>
1658             <row>
1659               <entry>Flag</entry>
1660               <entry>Description</entry>
1661               <entry>Static/Dynamic</entry>
1662               <entry>Reverse</entry>
1663             </row>
1664           </thead>
1665           <tbody>
1666             <row>
1667               <entry><option>-cpp</option></entry>
1668               <entry>Run the C pre-processor on Haskell source files</entry>
1669               <entry>dynamic</entry>
1670               <entry>-</entry>
1671             </row>
1672             <row>
1673               <entry><option>-D</option><replaceable>symbol</replaceable><optional>=<replaceable>value</replaceable></optional></entry>
1674               <entry>Define a symbol in the C pre-processor</entry>
1675               <entry>dynamic</entry>
1676               <entry><option>-U</option><replaceable>symbol</replaceable></entry>
1677             </row>
1678             <row>
1679               <entry><option>-U</option><replaceable>symbol</replaceable></entry>
1680               <entry>Undefine a symbol in the C pre-processor</entry>
1681               <entry>dynamic</entry>
1682               <entry>-</entry>
1683             </row>
1684             <row>
1685               <entry><option>-I</option><replaceable>dir</replaceable></entry>
1686               <entry>Add <replaceable>dir</replaceable> to the
1687               directory search list for <literal>#include</literal> files</entry>
1688               <entry>dynamic</entry>
1689               <entry>-</entry>
1690             </row>
1691           </tbody>
1692         </tgroup>
1693       </informaltable>
1694     </sect2>
1695
1696     <sect2>
1697       <title>Code generation options</title>
1698
1699       <para><xref linkend="options-codegen"/></para>
1700
1701       <informaltable>
1702         <tgroup cols="4" align="left" colsep="1" rowsep="1">
1703           <thead>
1704             <row>
1705               <entry>Flag</entry>
1706               <entry>Description</entry>
1707               <entry>Static/Dynamic</entry>
1708               <entry>Reverse</entry>
1709             </row>
1710           </thead>
1711           <tbody>
1712             <row>
1713               <entry><option>-fasm</option></entry>
1714               <entry>Use the native code generator</entry>
1715               <entry>dynamic</entry>
1716               <entry>-fvia-C</entry>
1717             </row>
1718             <row>
1719               <entry><option>-fvia-C</option></entry>
1720               <entry>Compile via C</entry>
1721               <entry>dynamic</entry>
1722               <entry>-fasm</entry>
1723             </row>
1724             <row>
1725               <entry><option>-fllvm</option></entry>
1726               <entry>Compile via LLVM</entry>
1727               <entry>dynamic</entry>
1728               <entry>-fasm</entry>
1729             </row>
1730             <row>
1731               <entry><option>-fno-code</option></entry>
1732               <entry>Omit code generation</entry>
1733               <entry>dynamic</entry>
1734               <entry>-</entry>
1735             </row>
1736             <row>
1737               <entry><option>-fbyte-code</option></entry>
1738               <entry>Generate byte-code</entry>
1739               <entry>dynamic</entry>
1740               <entry>-</entry>
1741             </row>
1742             <row>
1743               <entry><option>-fobject-code</option></entry>
1744               <entry>Generate object code</entry>
1745               <entry>dynamic</entry>
1746               <entry>-</entry>
1747             </row>
1748           </tbody>
1749         </tgroup>
1750       </informaltable>
1751     </sect2>
1752
1753     <sect2>
1754       <title>Linking options</title>
1755
1756       <para><xref linkend="options-linker"/></para>
1757
1758       <informaltable>
1759         <tgroup cols="4" align="left" colsep="1" rowsep="1">
1760           <thead>
1761             <row>
1762               <entry>Flag</entry>
1763               <entry>Description</entry>
1764               <entry>Static/Dynamic</entry>
1765               <entry>Reverse</entry>
1766             </row>
1767           </thead>
1768           <tbody>
1769             <row>
1770               <entry><option>-shared</option></entry>
1771               <entry>Generate a shared library (as opposed to an executable)</entry>
1772               <entry>dynamic</entry>
1773               <entry>-</entry>
1774             </row>
1775             <row>
1776               <entry><option>-fPIC</option></entry>
1777               <entry>Generate position-independent code (where available)</entry>
1778               <entry>static</entry>
1779               <entry>-</entry>
1780             </row>
1781             <row>
1782               <entry><option>-dynamic</option></entry>
1783               <entry>Use dynamic Haskell libraries (if available)</entry>
1784               <entry>static</entry>
1785               <entry>-</entry>
1786             </row>
1787             <row>
1788               <entry><option>-dynload</option></entry>
1789               <entry>Selects one of a number of modes for finding shared
1790                 libraries at runtime.</entry>
1791               <entry>static</entry>
1792               <entry>-</entry>
1793             </row>
1794             <row>
1795               <entry><option>-framework</option> <replaceable>name</replaceable></entry>
1796               <entry>On Darwin/MacOS X only, link in the framework <replaceable>name</replaceable>.
1797                 This option corresponds to the <option>-framework</option> option for Apple's Linker.</entry>
1798               <entry>dynamic</entry>
1799               <entry>-</entry>
1800             </row>
1801             <row>
1802               <entry><option>-framework-path</option> <replaceable>name</replaceable></entry>
1803               <entry>On Darwin/MacOS X only, add <replaceable>dir</replaceable> to the list of
1804                 directories searched for frameworks.
1805                 This option corresponds to the <option>-F</option> option for Apple's Linker.</entry>
1806               <entry>dynamic</entry>
1807               <entry>-</entry>
1808             </row>
1809             <row>
1810               <entry><option>-l</option><replaceable>lib</replaceable></entry>
1811               <entry>Link in library <replaceable>lib</replaceable></entry>
1812               <entry>dynamic</entry>
1813               <entry>-</entry>
1814             </row>
1815             <row>
1816               <entry><option>-L</option><replaceable>dir</replaceable></entry>
1817               <entry>Add <replaceable>dir</replaceable> to the list of
1818               directories searched for libraries</entry>
1819               <entry>dynamic</entry>
1820               <entry>-</entry>
1821             </row>
1822             <row>
1823               <entry><option>-main-is</option></entry>
1824               <entry>Set main module and function</entry>
1825               <entry>dynamic</entry>
1826               <entry>-</entry>
1827             </row>
1828             <row>
1829               <entry><option>--mk-dll</option></entry>
1830               <entry>DLL-creation mode (Windows only)</entry>
1831               <entry>dynamic</entry>
1832               <entry>-</entry>
1833             </row>
1834             <row>
1835               <entry><option>-no-hs-main</option></entry>
1836               <entry>Don't assume this program contains <literal>main</literal></entry>
1837               <entry>dynamic</entry>
1838               <entry>-</entry>
1839             </row>
1840             <row>
1841               <entry><option>-rtsopts</option>, <option>-rtsopts={none,some,all}</option></entry>
1842               <entry>Control whether the RTS behaviour can be tweaked via command-line
1843           flags and the <literal>GHCRTS</literal> environment
1844           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>
1845               <entry>dynamic</entry>
1846               <entry>-</entry>
1847             </row>
1848             <row>
1849               <entry><option>-with-rtsopts=<replaceable>opts</replaceable></option></entry>
1850               <entry>Set the default RTS options to
1851           <replaceable>opts</replaceable>.</entry>
1852               <entry>dynamic</entry>
1853               <entry>-</entry>
1854             </row>
1855             <row>
1856               <entry><option>-no-link</option></entry>
1857               <entry>Omit linking</entry>
1858               <entry>dynamic</entry>
1859               <entry>-</entry>
1860             </row>
1861             <row>
1862               <entry><option>-split-objs</option></entry>
1863               <entry>Split objects (for libraries)</entry>
1864               <entry>dynamic</entry>
1865               <entry>-</entry>
1866             </row>
1867             <row>
1868               <entry><option>-static</option></entry>
1869               <entry>Use static Haskell libraries</entry>
1870               <entry>static</entry>
1871               <entry>-</entry>
1872             </row>
1873             <row>
1874               <entry><option>-threaded</option></entry>
1875               <entry>Use the threaded runtime</entry>
1876               <entry>static</entry>
1877               <entry>-</entry>
1878             </row>
1879             <row>
1880               <entry><option>-debug</option></entry>
1881               <entry>Use the debugging runtime</entry>
1882               <entry>static</entry>
1883               <entry>-</entry>
1884             </row>
1885             <row>
1886               <entry><option>-eventlog</option></entry>
1887               <entry>Enable runtime event tracing</entry>
1888               <entry>static</entry>
1889               <entry>-</entry>
1890             </row>
1891             <row>
1892               <entry><option>-fno-gen-manifest</option></entry>
1893               <entry>Do not generate a manifest file (Windows only)</entry>
1894               <entry>dynamic</entry>
1895               <entry>-</entry>
1896             </row>
1897             <row>
1898               <entry><option>-fno-embed-manifest</option></entry>
1899               <entry>Do not embed the manifest in the executable (Windows only)</entry>
1900               <entry>dynamic</entry>
1901               <entry>-</entry>
1902             </row>
1903             <row>
1904               <entry><option>-fno-shared-implib</option></entry>
1905               <entry>Don't generate an import library for a DLL (Windows only)</entry>
1906               <entry>dynamic</entry>
1907               <entry>-</entry>
1908             </row>
1909             <row>
1910               <entry><option>-dylib-install-name</option> <replaceable>path</replaceable></entry>
1911               <entry>Set the install name (via <literal>-install_name</literal> passed to Apple's
1912               linker), specifying the full install path of the library file. Any libraries
1913               or executables that link with it later will pick up that path as their
1914               runtime search location for it. (Darwin/MacOS X only)</entry>
1915               <entry>dynamic</entry>
1916               <entry>-</entry>
1917             </row>
1918           </tbody>
1919         </tgroup>
1920       </informaltable>
1921     </sect2>
1922
1923     <sect2>
1924       <title>Replacing phases</title>
1925
1926       <para><xref linkend="replacing-phases"/></para>
1927
1928       <informaltable>
1929         <tgroup cols="4" align="left" colsep="1" rowsep="1">
1930           <thead>
1931             <row>
1932               <entry>Flag</entry>
1933               <entry>Description</entry>
1934               <entry>Static/Dynamic</entry>
1935               <entry>Reverse</entry>
1936             </row>
1937           </thead>
1938           <tbody>
1939             <row>
1940               <entry><option>-pgmL</option> <replaceable>cmd</replaceable></entry>
1941               <entry>Use <replaceable>cmd</replaceable> as the literate pre-processor</entry>
1942               <entry>dynamic</entry>
1943               <entry>-</entry>
1944             </row>
1945             <row>
1946               <entry><option>-pgmP</option> <replaceable>cmd</replaceable></entry>
1947               <entry>Use <replaceable>cmd</replaceable> as the C
1948               pre-processor (with <option>-cpp</option> only)</entry>
1949               <entry>dynamic</entry>
1950               <entry>-</entry>
1951             </row>
1952             <row>
1953               <entry><option>-pgmc</option> <replaceable>cmd</replaceable></entry>
1954               <entry>Use <replaceable>cmd</replaceable> as the C compiler</entry>
1955               <entry>dynamic</entry>
1956               <entry>-</entry>
1957             <row>
1958               <entry><option>-pgmlo</option> <replaceable>cmd</replaceable></entry>
1959               <entry>Use <replaceable>cmd</replaceable> as the LLVM optimiser</entry>
1960               <entry>dynamic</entry>
1961               <entry>-</entry>
1962             </row>
1963             <row>
1964               <entry><option>-pgmlc</option> <replaceable>cmd</replaceable></entry>
1965               <entry>Use <replaceable>cmd</replaceable> as the LLVM compiler</entry>
1966               <entry>dynamic</entry>
1967               <entry>-</entry>
1968             </row>
1969             </row>
1970             <row>
1971               <entry><option>-pgmm</option> <replaceable>cmd</replaceable></entry>
1972               <entry>Use <replaceable>cmd</replaceable> as the mangler</entry>
1973               <entry>dynamic</entry>
1974               <entry>-</entry>
1975             </row>
1976             <row>
1977               <entry><option>-pgms</option> <replaceable>cmd</replaceable></entry>
1978               <entry>Use <replaceable>cmd</replaceable> as the splitter</entry>
1979               <entry>dynamic</entry>
1980               <entry>-</entry>
1981             </row>
1982             <row>
1983               <entry><option>-pgma</option> <replaceable>cmd</replaceable></entry>
1984               <entry>Use <replaceable>cmd</replaceable> as the assembler</entry>
1985               <entry>dynamic</entry>
1986               <entry>-</entry>
1987             </row>
1988             <row>
1989               <entry><option>-pgml</option> <replaceable>cmd</replaceable></entry>
1990               <entry>Use <replaceable>cmd</replaceable> as the linker</entry>
1991               <entry>dynamic</entry>
1992               <entry>-</entry>
1993             </row>
1994             <row>
1995               <entry><option>-pgmdll</option> <replaceable>cmd</replaceable></entry>
1996               <entry>Use <replaceable>cmd</replaceable> as the DLL generator</entry>
1997               <entry>dynamic</entry>
1998               <entry>-</entry>
1999             </row>
2000             <row>
2001               <entry><option>-pgmF</option> <replaceable>cmd</replaceable></entry>
2002               <entry>Use <replaceable>cmd</replaceable> as the pre-processor
2003               (with <option>-F</option> only)</entry>
2004               <entry>dynamic</entry>
2005               <entry>-</entry>
2006             </row>
2007             <row>
2008               <entry><option>-pgmwindres</option> <replaceable>cmd</replaceable></entry>
2009               <entry>Use <replaceable>cmd</replaceable> as the program for
2010                 embedding manifests on Windows.</entry>
2011               <entry>dynamic</entry>
2012               <entry>-</entry>
2013             </row>
2014           </tbody>
2015         </tgroup>
2016       </informaltable>
2017       <indexterm><primary><option>-pgmL</option></primary></indexterm>
2018       <indexterm><primary><option>-pgmP</option></primary></indexterm>
2019       <indexterm><primary><option>-pgmc</option></primary></indexterm>
2020       <indexterm><primary><option>-pgmlo</option></primary></indexterm>
2021       <indexterm><primary><option>-pgmlc</option></primary></indexterm>
2022       <indexterm><primary><option>-pgma</option></primary></indexterm>
2023       <indexterm><primary><option>-pgml</option></primary></indexterm>
2024       <indexterm><primary><option>-pgmdll</option></primary></indexterm>
2025       <indexterm><primary><option>-pgmF</option></primary></indexterm>
2026
2027     </sect2>
2028
2029     <sect2>
2030       <title>Forcing options to particular phases</title>
2031
2032       <para><xref linkend="forcing-options-through"/></para>
2033
2034       <informaltable>
2035         <tgroup cols="4" align="left" colsep="1" rowsep="1">
2036           <thead>
2037             <row>
2038               <entry>Flag</entry>
2039               <entry>Description</entry>
2040               <entry>Static/Dynamic</entry>
2041               <entry>Reverse</entry>
2042             </row>
2043           </thead>
2044           <tbody>
2045             <row>
2046               <entry><option>-optL</option> <replaceable>option</replaceable></entry>
2047               <entry>pass <replaceable>option</replaceable> to the literate pre-processor</entry>
2048               <entry>dynamic</entry>
2049               <entry>-</entry>
2050             </row>
2051             <row>
2052               <entry><option>-optP</option> <replaceable>option</replaceable></entry>
2053               <entry>pass <replaceable>option</replaceable> to cpp (with
2054               <option>-cpp</option> only)</entry>
2055               <entry>dynamic</entry>
2056               <entry>-</entry>
2057             </row>
2058             <row>
2059               <entry><option>-optF</option> <replaceable>option</replaceable></entry>
2060               <entry>pass <replaceable>option</replaceable> to the
2061               custom pre-processor</entry>
2062               <entry>dynamic</entry>
2063               <entry>-</entry>
2064             </row>
2065             <row>
2066               <entry><option>-optc</option> <replaceable>option</replaceable></entry>
2067               <entry>pass <replaceable>option</replaceable> to the C compiler</entry>
2068               <entry>dynamic</entry>
2069               <entry>-</entry>
2070             </row>
2071             <row>
2072               <entry><option>-optlo</option> <replaceable>option</replaceable></entry>
2073               <entry>pass <replaceable>option</replaceable> to the LLVM optimiser</entry>
2074               <entry>dynamic</entry>
2075               <entry>-</entry>
2076             </row>
2077             <row>
2078               <entry><option>-optlc</option> <replaceable>option</replaceable></entry>
2079               <entry>pass <replaceable>option</replaceable> to the LLVM compiler</entry>
2080               <entry>dynamic</entry>
2081               <entry>-</entry>
2082             </row>
2083             <row>
2084               <entry><option>-optm</option> <replaceable>option</replaceable></entry>
2085               <entry>pass <replaceable>option</replaceable> to the mangler</entry>
2086               <entry>dynamic</entry>
2087               <entry>-</entry>
2088             </row>
2089             <row>
2090               <entry><option>-opta</option> <replaceable>option</replaceable></entry>
2091               <entry>pass <replaceable>option</replaceable> to the assembler</entry>
2092               <entry>dynamic</entry>
2093               <entry>-</entry>
2094             </row>
2095             <row>
2096               <entry><option>-optl</option> <replaceable>option</replaceable></entry>
2097               <entry>pass <replaceable>option</replaceable> to the linker</entry>
2098               <entry>dynamic</entry>
2099               <entry>-</entry>
2100             </row>
2101             <row>
2102               <entry><option>-optdll</option> <replaceable>option</replaceable></entry>
2103               <entry>pass <replaceable>option</replaceable> to the DLL generator</entry>
2104               <entry>dynamic</entry>
2105               <entry>-</entry>
2106             </row>
2107             <row>
2108               <entry><option>-optwindres</option> <replaceable>option</replaceable></entry>
2109               <entry>pass <replaceable>option</replaceable> to <literal>windres</literal>.</entry>
2110               <entry>dynamic</entry>
2111               <entry>-</entry>
2112             </row>
2113           </tbody>
2114         </tgroup>
2115       </informaltable>
2116     </sect2>
2117
2118     <sect2>
2119       <title>Platform-specific options</title>
2120
2121       <para><xref linkend="options-platform"/></para>
2122
2123       <informaltable>
2124         <tgroup cols="4" align="left" colsep="1" rowsep="1">
2125           <thead>
2126             <row>
2127               <entry>Flag</entry>
2128               <entry>Description</entry>
2129               <entry>Static/Dynamic</entry>
2130               <entry>Reverse</entry>
2131             </row>
2132           </thead>
2133           <tbody>
2134             <row>
2135               <entry><option>-msse2</option></entry>
2136               <entry>(x86 only) Use SSE2 for floating point</entry>
2137               <entry>dynamic</entry>
2138               <entry>-</entry>
2139             </row>
2140           </tbody>
2141           <tbody>
2142             <row>
2143               <entry><option>-monly-[432]-regs</option></entry>
2144               <entry>(x86 only) give some registers back to the C compiler</entry>
2145               <entry>dynamic</entry>
2146               <entry>-</entry>
2147             </row>
2148           </tbody>
2149         </tgroup>
2150       </informaltable>
2151     </sect2>
2152
2153
2154     <sect2>
2155       <title>External core file options</title>
2156
2157       <para><xref linkend="ext-core"/></para>
2158
2159       <informaltable>
2160         <tgroup cols="4" align="left" colsep="1" rowsep="1">
2161           <thead>
2162             <row>
2163               <entry>Flag</entry>
2164               <entry>Description</entry>
2165               <entry>Static/Dynamic</entry>
2166               <entry>Reverse</entry>
2167             </row>
2168           </thead>
2169           <tbody>
2170             <row>
2171               <entry><option>-fext-core</option></entry>
2172               <entry>Generate <filename>.hcr</filename> external Core files</entry>
2173               <entry>dynamic</entry>
2174               <entry>-</entry>
2175             </row>
2176           </tbody>
2177         </tgroup>
2178       </informaltable>
2179     </sect2>
2180
2181
2182     <sect2>
2183       <title>Compiler debugging options</title>
2184
2185       <para><xref linkend="options-debugging"/></para>
2186
2187       <informaltable>
2188         <tgroup cols="4" align="left" colsep="1" rowsep="1">
2189           <thead>
2190             <row>
2191               <entry>Flag</entry>
2192               <entry>Description</entry>
2193               <entry>Static/Dynamic</entry>
2194               <entry>Reverse</entry>
2195             </row>
2196           </thead>
2197           <tbody>
2198             <row>
2199               <entry><option>-dcore-lint</option></entry>
2200               <entry>Turn on internal sanity checking</entry>
2201               <entry>dynamic</entry>
2202               <entry>-</entry>
2203             </row>
2204             <row>
2205               <entry><option>-ddump-asm</option></entry>
2206               <entry>Dump assembly</entry>
2207               <entry>dynamic</entry>
2208               <entry>-</entry>
2209             </row>
2210             <row>
2211               <entry><option>-ddump-bcos</option></entry>
2212               <entry>Dump interpreter byte code</entry>
2213               <entry>dynamic</entry>
2214               <entry>-</entry>
2215             </row>
2216             <row>
2217               <entry><option>-ddump-cmm</option></entry>
2218               <entry>Dump C-- output</entry>
2219               <entry>dynamic</entry>
2220               <entry>-</entry>
2221             </row>
2222             <row>
2223               <entry><option>-ddump-cpranal</option></entry>
2224               <entry>Dump output from CPR analysis</entry>
2225               <entry>dynamic</entry>
2226               <entry>-</entry>
2227             </row>
2228             <row>
2229               <entry><option>-ddump-cse</option></entry>
2230               <entry>Dump CSE output</entry>
2231               <entry>dynamic</entry>
2232               <entry>-</entry>
2233             </row>
2234             <row>
2235               <entry><option>-ddump-deriv</option></entry>
2236               <entry>Dump deriving output</entry>
2237               <entry>dynamic</entry>
2238               <entry>-</entry>
2239             </row>
2240             <row>
2241               <entry><option>-ddump-ds</option></entry>
2242               <entry>Dump desugarer output</entry>
2243               <entry>dynamic</entry>
2244               <entry>-</entry>
2245             </row>
2246             <row>
2247               <entry><option>-ddump-flatC</option></entry>
2248               <entry>Dump &ldquo;flat&rdquo; C</entry>
2249               <entry>dynamic</entry>
2250               <entry>-</entry>
2251             </row>
2252             <row>
2253               <entry><option>-ddump-foreign</option></entry>
2254               <entry>Dump <literal>foreign export</literal> stubs</entry>
2255               <entry>dynamic</entry>
2256               <entry>-</entry>
2257             </row>
2258             <row>
2259               <entry><option>-ddump-hpc</option></entry>
2260               <entry>Dump after instrumentation for program coverage</entry>
2261               <entry>dynamic</entry>
2262               <entry>-</entry>
2263             </row>
2264             <row>
2265               <entry><option>-ddump-inlinings</option></entry>
2266               <entry>Dump inlining info</entry>
2267               <entry>dynamic</entry>
2268               <entry>-</entry>
2269             </row>
2270             <row>
2271               <entry><option>-ddump-llvm</option></entry>
2272               <entry>Dump LLVM intermediate code</entry>
2273               <entry>dynamic</entry>
2274               <entry>-</entry>
2275             </row>
2276             <row>
2277               <entry><option>-ddump-occur-anal</option></entry>
2278               <entry>Dump occurrence analysis output</entry>
2279               <entry>dynamic</entry>
2280               <entry>-</entry>
2281             </row>
2282             <row>
2283               <entry><option>-ddump-opt-cmm</option></entry>
2284               <entry>Dump the results of C-- to C-- optimising passes</entry>
2285               <entry>dynamic</entry>
2286               <entry>-</entry>
2287             </row>
2288             <row>
2289               <entry><option>-ddump-parsed</option></entry>
2290               <entry>Dump parse tree</entry>
2291               <entry>dynamic</entry>
2292               <entry>-</entry>
2293             </row>
2294             <row>
2295               <entry><option>-ddump-prep</option></entry>
2296               <entry>Dump prepared core</entry>
2297               <entry>dynamic</entry>
2298               <entry>-</entry>
2299             </row>
2300             <row>
2301               <entry><option>-ddump-rn</option></entry>
2302               <entry>Dump renamer output</entry>
2303               <entry>dynamic</entry>
2304               <entry>-</entry>
2305             </row>
2306             <row>
2307               <entry><option>-ddump-rules</option></entry>
2308               <entry>Dump rules</entry>
2309               <entry>dynamic</entry>
2310               <entry>-</entry>
2311             </row>
2312             <row>
2313               <entry><option>-ddump-simpl</option></entry>
2314               <entry>Dump final simplifier output</entry>
2315               <entry>dynamic</entry>
2316               <entry>-</entry>
2317             </row>
2318             <row>
2319               <entry><option>-ddump-simpl-phases</option></entry>
2320               <entry>Dump output from each simplifier phase</entry>
2321               <entry>dynamic</entry>
2322               <entry>-</entry>
2323             </row>
2324             <row>
2325               <entry><option>-ddump-simpl-iterations</option></entry>
2326               <entry>Dump output from each simplifier iteration</entry>
2327               <entry>dynamic</entry>
2328               <entry>-</entry>
2329             </row>
2330             <row>
2331               <entry><option>-ddump-spec</option></entry>
2332               <entry>Dump specialiser output</entry>
2333               <entry>dynamic</entry>
2334               <entry>-</entry>
2335             </row>
2336             <row>
2337               <entry><option>-ddump-splices</option></entry>
2338               <entry>Dump TH spliced expressions, and what they evaluate to</entry>
2339               <entry>dynamic</entry>
2340               <entry>-</entry>
2341             </row>
2342             <row>
2343               <entry><option>-ddump-stg</option></entry>
2344               <entry>Dump final STG</entry>
2345               <entry>dynamic</entry>
2346               <entry>-</entry>
2347             </row>
2348             <row>
2349               <entry><option>-ddump-stranal</option></entry>
2350               <entry>Dump strictness analyser output</entry>
2351               <entry>dynamic</entry>
2352               <entry>-</entry>
2353             </row>
2354             <row>
2355               <entry><option>-ddump-tc</option></entry>
2356               <entry>Dump typechecker output</entry>
2357               <entry>dynamic</entry>
2358               <entry>-</entry>
2359             </row>
2360             <row>
2361               <entry><option>-ddump-types</option></entry>
2362               <entry>Dump type signatures</entry>
2363               <entry>dynamic</entry>
2364               <entry>-</entry>
2365             </row>
2366             <row>
2367               <entry><option>-ddump-worker-wrapper</option></entry>
2368               <entry>Dump worker-wrapper output</entry>
2369               <entry>dynamic</entry>
2370               <entry>-</entry>
2371             </row>
2372             <row>
2373               <entry><option>-ddump-if-trace</option></entry>
2374               <entry>Trace interface files</entry>
2375               <entry>dynamic</entry>
2376               <entry>-</entry>
2377             </row>
2378             <row>
2379               <entry><option>-ddump-tc-trace</option></entry>
2380               <entry>Trace typechecker</entry>
2381               <entry>dynamic</entry>
2382               <entry>-</entry>
2383             </row>
2384             <row>
2385               <entry><option>-ddump-rn-trace</option></entry>
2386               <entry>Trace renamer</entry>
2387               <entry>dynamic</entry>
2388               <entry>-</entry>
2389             </row>
2390             <row>
2391               <entry><option>-ddump-rn-stats</option></entry>
2392               <entry>Renamer stats</entry>
2393               <entry>dynamic</entry>
2394               <entry>-</entry>
2395             </row>
2396             <row>
2397               <entry><option>-ddump-simpl-stats</option></entry>
2398               <entry>Dump simplifier stats</entry>
2399               <entry>dynamic</entry>
2400               <entry>-</entry>
2401             </row>
2402             <row>
2403               <entry><option>-dno-debug-output</option></entry>
2404               <entry>Suppress unsolicited debugging output</entry>
2405               <entry>static</entry>
2406               <entry>-</entry>
2407             </row>
2408             <row>
2409               <entry><option>-dppr-debug</option></entry>
2410               <entry>Turn on debug printing (more verbose)</entry>
2411               <entry>static</entry>
2412               <entry>-</entry>
2413             </row>
2414             <row>
2415               <entry><option>-dsuppress-uniques</option></entry>
2416               <entry>Suppress the printing of uniques in debug output (easier to use <command>diff</command>.</entry>
2417               <entry>static</entry>
2418               <entry>-</entry>
2419             </row>
2420             <row>
2421               <entry><option>-dsuppress-coercions</option></entry>
2422               <entry>Suppress the printing of coercions in Core dumps to make them shorter.</entry>
2423               <entry>static</entry>
2424               <entry>-</entry>
2425             </row>
2426             <row>
2427               <entry><option>-dsuppress-module-prefixes</option></entry>
2428               <entry>Suppress the printing of module qualification prefixes in Core dumps to make them easier to read.</entry>
2429               <entry>static</entry>
2430               <entry>-</entry>
2431             </row>
2432             <row>
2433               <entry><option>-dppr-noprags</option></entry>
2434               <entry>Don't output pragma info in dumps</entry>
2435               <entry>static</entry>
2436               <entry>-</entry>
2437             </row>
2438             <row>
2439               <entry><option>-dppr-user-length</option></entry>
2440               <entry>Set the depth for printing expressions in error msgs</entry>
2441               <entry>static</entry>
2442               <entry>-</entry>
2443             </row>
2444             <row>
2445               <entry><option>-dsource-stats</option></entry>
2446               <entry>Dump haskell source stats</entry>
2447               <entry>dynamic</entry>
2448               <entry>-</entry>
2449             </row>
2450             <row>
2451               <entry><option>-dcmm-lint</option></entry>
2452               <entry>C-- pass sanity checking</entry>
2453               <entry>dynamic</entry>
2454               <entry>-</entry>
2455             </row>
2456             <row>
2457               <entry><option>-dstg-lint</option></entry>
2458               <entry>STG pass sanity checking</entry>
2459               <entry>dynamic</entry>
2460               <entry>-</entry>
2461             </row>
2462             <row>
2463               <entry><option>-dstg-stats</option></entry>
2464               <entry>Dump STG stats</entry>
2465               <entry>dynamic</entry>
2466               <entry>-</entry>
2467             </row>
2468             <row>
2469               <entry><option>-dverbose-core2core</option></entry>
2470               <entry>Show output from each core-to-core pass</entry>
2471               <entry>dynamic</entry>
2472               <entry>-</entry>
2473             </row>
2474             <row>
2475               <entry><option>-dverbose-stg2stg</option></entry>
2476               <entry>Show output from each STG-to-STG pass</entry>
2477               <entry>dynamic</entry>
2478               <entry>-</entry>
2479             </row>
2480             <row>
2481               <entry><option>-dshow-passes</option></entry>
2482               <entry>Print out each pass name as it happens</entry>
2483               <entry>dynamic</entry>
2484               <entry>-</entry>
2485             </row>
2486             <row>
2487               <entry><option>-dfaststring-stats</option></entry>
2488               <entry>Show statistics for fast string usage when finished</entry>
2489               <entry>dynamic</entry>
2490               <entry>-</entry>
2491             </row>
2492           </tbody>
2493         </tgroup>
2494       </informaltable>
2495     </sect2>
2496
2497     <sect2>
2498       <title>Misc compiler options</title>
2499
2500       <informaltable>
2501         <tgroup cols="4" align="left" colsep="1" rowsep="1">
2502           <thead>
2503             <row>
2504               <entry>Flag</entry>
2505               <entry>Description</entry>
2506               <entry>Static/Dynamic</entry>
2507               <entry>Reverse</entry>
2508             </row>
2509           </thead>
2510           <tbody>
2511             <row>
2512               <entry><option>-fno-hi-version-check</option></entry>
2513               <entry>Don't complain about <literal>.hi</literal> file mismatches</entry>
2514               <entry>static</entry>
2515               <entry>-</entry>
2516             </row>
2517             <row>
2518               <entry><option>-dno-black-holing</option></entry>
2519               <entry>Turn off black holing (probably doesn't work)</entry>
2520               <entry>static</entry>
2521               <entry>-</entry>
2522             </row>
2523             <row>
2524               <entry><option>-fhistory-size</option></entry>
2525               <entry>Set simplification history size</entry>
2526               <entry>static</entry>
2527               <entry>-</entry>
2528             </row>
2529             <row>
2530               <entry><option>-funregisterised</option></entry>
2531               <entry>Unregisterised compilation (use <option>-unreg</option> instead)</entry>
2532               <entry>static</entry>
2533               <entry>-</entry>
2534             </row>
2535             <row>
2536               <entry><option>-fno-asm-mangling</option></entry>
2537               <entry>Turn off assembly mangling (use <option>-unreg</option> instead)</entry>
2538               <entry>dynamic</entry>
2539               <entry>-</entry>
2540             </row>
2541             <row>
2542               <entry><option>-fno-ghci-sandbox</option></entry>
2543               <entry>Turn off the GHCi sandbox. Means computations are run in teh main thread, rather than a forked thread.</entry>
2544               <entry>dynamic</entry>
2545               <entry>-</entry>
2546             </row>
2547           </tbody>
2548         </tgroup>
2549       </informaltable>
2550     </sect2>
2551   </sect1>
2552
2553
2554 <!--
2555 Still to document:
2556
2557 Misc:
2558   ,  ( "H"                 , HasArg (setHeapSize . fromIntegral . decodeSize) )
2559
2560   -Bdir
2561 -->
2562
2563 <!-- Emacs stuff:
2564      ;;; Local Variables: ***
2565      ;;; sgml-parent-document: ("users_guide.xml" "book" "chapter") ***
2566      ;;; End: ***
2567  -->