Remove dead code, now that -fvia-c is a no-op
[ghc.git] / 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-tmp-files</option></entry>
329 <entry>retain all intermediate temporary files</entry>
330 <entry>dynamic</entry>
331 <entry>-</entry>
332 </row>
333 </tbody>
334 </tgroup>
335 </informaltable>
336 </sect2>
337
338 <sect2>
339 <title>Temporary files</title>
340
341 <para><xref linkend="temp-files"/></para>
342
343 <informaltable>
344 <tgroup cols="4" align="left" colsep="1" rowsep="1">
345 <thead>
346 <row>
347 <entry>Flag</entry>
348 <entry>Description</entry>
349 <entry>Static/Dynamic</entry>
350 <entry>Reverse</entry>
351 </row>
352 </thead>
353 <tbody>
354 <row>
355 <entry><option>-tmpdir</option></entry>
356 <entry>set the directory for temporary files</entry>
357 <entry>dynamic</entry>
358 <entry>-</entry>
359 </row>
360 </tbody>
361 </tgroup>
362 </informaltable>
363 </sect2>
364
365 <sect2>
366 <title>Finding imports</title>
367
368 <para><xref linkend="search-path"/></para>
369
370 <informaltable>
371 <tgroup cols="4" align="left" colsep="1" rowsep="1">
372 <thead>
373 <row>
374 <entry>Flag</entry>
375
376 <entry>Description</entry>
377 <entry>Static/Dynamic</entry>
378 <entry>Reverse</entry>
379 </row>
380 </thead>
381 <tbody>
382 <row>
383 <entry><option>-i</option><replaceable>dir1</replaceable>:<replaceable>dir2</replaceable>:...</entry>
384 <entry>add <replaceable>dir</replaceable>,
385 <replaceable>dir2</replaceable>, etc. to import path</entry>
386 <entry>static/<literal>:set</literal></entry>
387 <entry>-</entry>
388 </row>
389 <row>
390 <entry><option>-i</option></entry>
391 <entry>Empty the import directory list</entry>
392 <entry>static/<literal>:set</literal></entry>
393 <entry>-</entry>
394 </row>
395 </tbody>
396 </tgroup>
397 </informaltable>
398 </sect2>
399
400 <sect2>
401 <title>Interface file options</title>
402
403 <para><xref linkend="hi-options"/></para>
404
405 <informaltable>
406 <tgroup cols="4" align="left" colsep="1" rowsep="1">
407 <thead>
408 <row>
409 <entry>Flag</entry>
410
411 <entry>Description</entry>
412 <entry>Static/Dynamic</entry>
413 <entry>Reverse</entry>
414 </row>
415 </thead>
416 <tbody>
417 <row>
418 <entry><option>-ddump-hi</option></entry>
419 <entry>Dump the new interface to stdout</entry>
420 <entry>dynamic</entry>
421 <entry>-</entry>
422 </row>
423 <row>
424 <entry><option>-ddump-hi-diffs</option></entry>
425 <entry>Show the differences vs. the old interface</entry>
426 <entry>dynamic</entry>
427 <entry>-</entry>
428 </row>
429 <row>
430 <entry><option>-ddump-minimal-imports</option></entry>
431 <entry>Dump a minimal set of imports</entry>
432 <entry>dynamic</entry>
433 <entry>-</entry>
434 </row>
435 <row>
436 <entry><option>--show-iface</option> <replaceable>file</replaceable></entry>
437 <entry>See <xref linkend="modes"/>.</entry>
438 </row>
439 </tbody>
440 </tgroup>
441 </informaltable>
442 </sect2>
443
444 <sect2>
445 <title>Recompilation checking</title>
446
447 <para><xref linkend="recomp"/></para>
448
449 <informaltable>
450 <tgroup cols="4" align="left" colsep="1" rowsep="1">
451 <thead>
452 <row>
453 <entry>Flag</entry>
454
455 <entry>Description</entry>
456 <entry>Static/Dynamic</entry>
457 <entry>Reverse</entry>
458 </row>
459 </thead>
460 <tbody>
461 <row>
462 <entry><option>-fforce-recomp</option></entry>
463 <entry>Turn off recompilation checking; implied by any
464 <option>-ddump-X</option> option</entry>
465 <entry>dynamic</entry>
466 <entry><option>-fno-force-recomp</option></entry>
467 </row>
468 </tbody>
469 </tgroup>
470 </informaltable>
471 </sect2>
472
473 <sect2 id="interactive-mode-options">
474 <title>Interactive-mode options</title>
475
476 <para><xref linkend="ghci-dot-files"/></para>
477
478 <informaltable>
479 <tgroup cols="4" align="left" colsep="1" rowsep="1">
480 <thead>
481 <row>
482 <entry>Flag</entry>
483 <entry>Description</entry>
484 <entry>Static/Dynamic</entry>
485 <entry>Reverse</entry>
486 </row>
487 </thead>
488 <tbody>
489 <row>
490 <entry><option>-ignore-dot-ghci</option></entry>
491 <entry>Disable reading of <filename>.ghci</filename> files</entry>
492 <entry>static</entry>
493 <entry>-</entry>
494 </row>
495 <row>
496 <entry><option>-read-dot-ghci</option></entry>
497 <entry>Enable reading of <filename>.ghci</filename> files</entry>
498 <entry>static</entry>
499 <entry>-</entry>
500 </row>
501 <row>
502 <entry><option>-fbreak-on-exception</option></entry>
503 <entry><link linkend="ghci-debugger-exceptions">Break on any exception thrown</link></entry>
504 <entry>dynamic</entry>
505 <entry><option>-fno-break-on-exception</option></entry>
506 </row>
507 <row>
508 <entry><option>-fbreak-on-error</option></entry>
509 <entry><link linkend="ghci-debugger-exceptions">Break on uncaught exceptions and errors</link></entry>
510 <entry>dynamic</entry>
511 <entry><option>-fno-break-on-error</option></entry>
512 </row>
513 <row>
514 <entry><option>-fprint-evld-with-show</option></entry>
515 <entry><link linkend="breakpoints">Enable usage of Show instances in <literal>:print</literal></link></entry>
516 <entry>dynamic</entry>
517 <entry><option>-fno-print-evld-with-show</option></entry>
518 </row>
519 <row>
520 <entry><option>-fprint-bind-result</option></entry>
521 <entry><link linkend="ghci-stmts">Turn on printing of binding results in GHCi</link></entry>
522 <entry>dynamic</entry>
523 <entry><option>-fno-print-bind-result</option></entry>
524 </row>
525 <row>
526 <entry><option>-fno-print-bind-contents</option></entry>
527 <entry><link linkend="breakpoints">Turn off printing of binding contents in GHCi</link></entry>
528 <entry>dynamic</entry>
529 <entry>-</entry>
530 </row>
531 <row>
532 <entry><option>-fno-implicit-import-qualified</option></entry>
533 <entry><link linkend="ghci-import-qualified">Turn off
534 implicit qualified import of everything in GHCi</link></entry>
535 <entry>dynamic</entry>
536 <entry>-</entry>
537 </row>
538
539 </tbody>
540 </tgroup>
541 </informaltable>
542 </sect2>
543
544 <sect2>
545 <title>Packages</title>
546
547 <para><xref linkend="packages"/></para>
548
549 <informaltable>
550 <tgroup cols="4" align="left" colsep="1" rowsep="1">
551 <thead>
552 <row>
553 <entry>Flag</entry>
554 <entry>Description</entry>
555 <entry>Static/Dynamic</entry>
556 <entry>Reverse</entry>
557 </row>
558 </thead>
559 <tbody>
560 <row>
561 <entry><option>-package-name</option> <replaceable>P</replaceable></entry>
562 <entry>Compile to be part of package <replaceable>P</replaceable></entry>
563 <entry>dynamic</entry>
564 <entry>-</entry>
565 </row>
566 <row>
567 <entry><option>-package</option> <replaceable>P</replaceable></entry>
568 <entry>Expose package <replaceable>P</replaceable></entry>
569 <entry>static/<literal>:set</literal></entry>
570 <entry>-</entry>
571 </row>
572 <row>
573 <entry><option>-hide-all-packages</option></entry>
574 <entry>Hide all packages by default</entry>
575 <entry>static</entry>
576 <entry>-</entry>
577 </row>
578 <row>
579 <entry><option>-hide-package</option> <replaceable>name</replaceable></entry>
580 <entry>Hide package <replaceable>P</replaceable></entry>
581 <entry>static/<literal>:set</literal></entry>
582 <entry>-</entry>
583 </row>
584 <row>
585 <entry><option>-ignore-package</option> <replaceable>name</replaceable></entry>
586 <entry>Ignore package <replaceable>P</replaceable></entry>
587 <entry>static/<literal>:set</literal></entry>
588 <entry>-</entry>
589 </row>
590 <row>
591 <entry><option>-package-conf</option> <replaceable>file</replaceable></entry>
592 <entry>Load more packages from <replaceable>file</replaceable></entry>
593 <entry>static</entry>
594 <entry>-</entry>
595 </row>
596 <row>
597 <entry><option>-no-user-package-conf</option></entry>
598 <entry>Don't load the user's package config file.</entry>
599 <entry>static</entry>
600 <entry>-</entry>
601 </row>
602 <row>
603 <entry><option>-no-auto-link-packages</option></entry>
604 <entry>Don't automatically link in the haskell98 package.</entry>
605 <entry>dynamic</entry>
606 <entry>-</entry>
607 </row>
608 </tbody>
609 </tgroup>
610 </informaltable>
611 </sect2>
612
613 <sect2>
614 <title>Language options</title>
615
616 <para>Language options can be enabled either by a command-line option
617 <option>-Xblah</option>, or by a <literal>{-# LANGUAGE blah #-}</literal>
618 pragma in the file itself. See <xref linkend="options-language"/></para>
619
620 <informaltable>
621 <tgroup cols="4" align="left" colsep="1" rowsep="1">
622 <thead>
623 <row>
624 <entry>Flag</entry>
625 <entry>Description</entry>
626 <entry>Static/Dynamic</entry>
627 <entry>Reverse</entry>
628 </row>
629 </thead>
630 <tbody>
631 <row>
632 <entry><option>-fglasgow-exts</option></entry>
633 <entry>Enable most language extensions</entry>
634 <entry>dynamic</entry>
635 <entry><option>-fno-glasgow-exts</option></entry>
636 </row>
637 <row>
638 <entry><option>-XOverlappingInstances</option></entry>
639 <entry>Enable <link linkend="instance-overlap">overlapping instances</link></entry>
640 <entry>dynamic</entry>
641 <entry><option>-XNoOverlappingInstances</option></entry>
642 </row>
643 <row>
644 <entry><option>-XIncoherentInstances</option></entry>
645 <entry>Enable <link linkend="instance-overlap">incoherent instances</link>.
646 Implies <option>-XOverlappingInstances</option> </entry>
647 <entry>dynamic</entry>
648 <entry><option>-XNoIncoherentInstances</option></entry>
649 </row>
650 <row>
651 <entry><option>-XUndecidableInstances</option></entry>
652 <entry>Enable <link linkend="undecidable-instances">undecidable instances</link></entry>
653 <entry>dynamic</entry>
654 <entry><option>-XNoUndecidableInstances</option></entry>
655 </row>
656 <row>
657 <entry><option>-fcontext-stack=N</option><replaceable>n</replaceable></entry>
658 <entry>set the <link linkend="undecidable-instances">limit for context reduction</link>. Default is 20.</entry>
659 <entry>dynamic</entry>
660 <entry></entry>
661 </row>
662 <row>
663 <entry><option>-XArrows</option></entry>
664 <entry>Enable <link linkend="arrow-notation">arrow
665 notation</link> extension</entry>
666 <entry>dynamic</entry>
667 <entry><option>-XNoArrows</option></entry>
668 </row>
669 <row>
670 <entry><option>-XDisambiguateRecordFields</option></entry>
671 <entry>Enable <link linkend="disambiguate-fields">record
672 field disambiguation</link></entry>
673 <entry>dynamic</entry>
674 <entry><option>-XNoDisambiguateRecordFields</option></entry>
675 </row>
676 <row>
677 <entry><option>-XForeignFunctionInterface</option></entry>
678 <entry>Enable <link linkend="ffi">foreign function interface</link> (implied by
679 <option>-fglasgow-exts</option>)</entry>
680 <entry>dynamic</entry>
681 <entry><option>-XNoForeignFunctionInterface</option></entry>
682 </row>
683 <row>
684 <entry><option>-XGenerics</option></entry>
685 <entry>Enable <link linkend="generic-classes">generic classes</link></entry>
686 <entry>dynamic</entry>
687 <entry><option>-XNoGenerics</option></entry>
688 </row>
689 <row>
690 <entry><option>-XImplicitParams</option></entry>
691 <entry>Enable <link linkend="implicit-parameters">Implicit Parameters</link>.
692 Implied by <option>-fglasgow-exts</option>.</entry>
693 <entry>dynamic</entry>
694 <entry><option>-XNoImplicitParams</option></entry>
695 </row>
696 <row>
697 <entry><option>-firrefutable-tuples</option></entry>
698 <entry>Make tuple pattern matching irrefutable</entry>
699 <entry>dynamic</entry>
700 <entry><option>-fno-irrefutable-tuples</option></entry>
701 </row>
702 <row>
703 <entry><option>-XNoImplicitPrelude</option></entry>
704 <entry>Don't implicitly <literal>import Prelude</literal></entry>
705 <entry>dynamic</entry>
706 <entry><option>-XImplicitPrelude</option></entry>
707 </row>
708 <row>
709 <entry><option>-XRebindableSyntax</option></entry>
710 <entry>Employ <link linkend="rebindable-syntax">rebindable syntax</link></entry>
711 <entry>dynamic</entry>
712 <entry><option>-XNoRebindableSyntax</option></entry>
713 </row>
714 <row>
715 <entry><option>-XNoMonomorphismRestriction</option></entry>
716 <entry>Disable the <link linkend="monomorphism">monomorphism restriction</link></entry>
717 <entry>dynamic</entry>
718 <entry><option>-XMonomorphismRrestriction</option></entry>
719 </row>
720 <row>
721 <entry><option>-XNoNPlusKPatterns</option></entry>
722 <entry>Disable support for <literal>n+k</literal> patterns</entry>
723 <entry>dynamic</entry>
724 <entry><option>-XNPlusKPatterns</option></entry>
725 </row>
726 <row>
727 <entry><option>-XNoMonoPatBinds</option></entry>
728 <entry>Make <link linkend="monomorphism">pattern bindings polymorphic</link></entry>
729 <entry>dynamic</entry>
730 <entry><option>-XMonoPatBinds</option></entry>
731 </row>
732 <row>
733 <entry><option>-XRelaxedPolyRec</option></entry>
734 <entry>Relaxed checking for <link linkend="typing-binds">mutually-recursive polymorphic functions</link></entry>
735 <entry>dynamic</entry>
736 <entry><option>-XNoRelaxedPolyRec</option></entry>
737 </row>
738 <row>
739 <entry><option>-XExtendedDefaultRules</option></entry>
740 <entry>Use GHCi's <link linkend="extended-default-rules">extended default rules</link> in a normal module</entry>
741 <entry>dynamic</entry>
742 <entry><option>-XNoExtendedDefaultRules</option></entry>
743 </row>
744 <row>
745 <entry><option>-XOverloadedStrings</option></entry>
746 <entry>Enable <link linkend="overloaded-strings">overloaded string literals</link>.
747 </entry>
748 <entry>dynamic</entry>
749 <entry><option>-XNoOverloadedStrings</option></entry>
750 </row>
751 <row>
752 <entry><option>-XGADTs</option></entry>
753 <entry>Enable <link linkend="gadt">generalised algebraic data types</link>.
754 </entry>
755 <entry>dynamic</entry>
756 <entry><option>-XNoGADTs</option></entry>
757 </row>
758 <row>
759 <entry><option>-XGADTSyntax</option></entry>
760 <entry>Enable <link linkend="gadt-style">generalised algebraic data type syntax</link>.
761 </entry>
762 <entry>dynamic</entry>
763 <entry><option>-XNoGADTSyntax</option></entry>
764 </row>
765 <row>
766 <entry><option>-XTypeFamilies</option></entry>
767 <entry>Enable <link linkend="type-families">type families</link>.</entry>
768 <entry>dynamic</entry>
769 <entry><option>-XNoTypeFamilies</option></entry>
770 </row>
771 <row>
772 <entry><option>-XScopedTypeVariables</option></entry>
773 <entry>Enable <link linkend="scoped-type-variables">lexically-scoped type variables</link>.
774 Implied by <option>-fglasgow-exts</option>.</entry>
775 <entry>dynamic</entry>
776 <entry><option>-XNoScopedTypeVariables</option></entry>
777 </row>
778 <row>
779 <entry><option>-XMonoLocalBinds</option></entry>
780 <entry>Enable <link linkend="mono-local-binds">do not generalise local bindings</link>.
781 </entry>
782 <entry>dynamic</entry>
783 <entry><option>-XNoMonoLocalBinds</option></entry>
784 </row>
785 <row>
786 <entry><option>-XTemplateHaskell</option></entry>
787 <entry>Enable <link linkend="template-haskell">Template Haskell</link>.
788 No longer implied by <option>-fglasgow-exts</option>.</entry>
789 <entry>dynamic</entry>
790 <entry><option>-XNoTemplateHaskell</option></entry>
791 </row>
792 <row>
793 <entry><option>-XQuasiQuotes</option></entry>
794 <entry>Enable <link linkend="th-quasiquotation">quasiquotation</link>.</entry>
795 <entry>dynamic</entry>
796 <entry><option>-XNoQuasiQuotes</option></entry>
797 </row>
798 <row>
799 <entry><option>-XBangPatterns</option></entry>
800 <entry>Enable <link linkend="bang-patterns">bang patterns</link>.</entry>
801 <entry>dynamic</entry>
802 <entry><option>-XNoBangPatterns</option></entry>
803 </row>
804 <row>
805 <entry><option>-XCPP</option></entry>
806 <entry>Enable the <link linkend="c-pre-processor">C preprocessor</link>.</entry>
807 <entry>dynamic</entry>
808 <entry><option>-XNoCPP</option></entry>
809 </row>
810 <row>
811 <entry><option>-XPatternGuards</option></entry>
812 <entry>Enable <link linkend="pattern-guards">pattern guards</link>.</entry>
813 <entry>dynamic</entry>
814 <entry><option>-XNoPatternGuards</option></entry>
815 </row>
816 <row>
817 <entry><option>-XViewPatterns</option></entry>
818 <entry>Enable <link linkend="view-patterns">view patterns</link>.</entry>
819 <entry>dynamic</entry>
820 <entry><option>-XNoViewPatterns</option></entry>
821 </row>
822 <row>
823 <entry><option>-XUnicodeSyntax</option></entry>
824 <entry>Enable <link linkend="unicode-syntax">unicode syntax</link>.</entry>
825 <entry>dynamic</entry>
826 <entry><option>-XNoUnicodeSyntax</option></entry>
827 </row>
828 <row>
829 <entry><option>-XMagicHash</option></entry>
830 <entry>Allow "#" as a <link linkend="magic-hash">postfix modifier on identifiers</link>.</entry>
831 <entry>dynamic</entry>
832 <entry><option>-XNoMagicHash</option></entry>
833 </row>
834 <row>
835 <entry><option>-XExplicitForALl</option></entry>
836 <entry>Enable <link linkend="explicit-foralls">explicit universal quantification</link>.
837 Implied by <option>-XScopedTypeVariables</option>,
838 <option>-XLiberalTypeSynonyms</option>,
839 <option>-XRank2Types</option>,
840 <option>-XRankNTypes</option>,
841 <option>-XPolymorphicComponents</option>,
842 <option>-XExistentialQuantification</option>
843 </entry>
844 <entry>dynamic</entry>
845 <entry><option>-XNoExplicitForAll</option></entry>
846 </row>
847 <row>
848 <entry><option>-XPolymorphicComponents</option></entry>
849 <entry>Enable <link linkend="universal-quantification">polymorphic components for data constructors</link>.</entry>
850 <entry>dynamic</entry>
851 <entry><option>-XNoPolymorphicComponents</option></entry>
852 </row>
853 <row>
854 <entry><option>-XRank2Types</option></entry>
855 <entry>Enable <link linkend="universal-quantification">rank-2 types</link>.</entry>
856 <entry>dynamic</entry>
857 <entry><option>-XNoRank2Types</option></entry>
858 </row>
859 <row>
860 <entry><option>-XRankNTypes</option></entry>
861 <entry>Enable <link linkend="universal-quantification">rank-N types</link>.</entry>
862 <entry>dynamic</entry>
863 <entry><option>-XNoRankNTypes</option></entry>
864 </row>
865 <row>
866 <entry><option>-XImpredicativeTypes</option></entry>
867 <entry>Enable <link linkend="impredicative-polymorphism">impredicative types</link>.</entry>
868 <entry>dynamic</entry>
869 <entry><option>-XNoImpredicativeTypes</option></entry>
870 </row>
871 <row>
872 <entry><option>-XExistentialQuantification</option></entry>
873 <entry>Enable <link linkend="existential-quantification">existential quantification</link>.</entry>
874 <entry>dynamic</entry>
875 <entry><option>-XNoExistentialQuantification</option></entry>
876 </row>
877 <row>
878 <entry><option>-XKindSignatures</option></entry>
879 <entry>Enable <link linkend="kinding">kind signatures</link>.</entry>
880 <entry>dynamic</entry>
881 <entry><option>-XNoKindSignatures</option></entry>
882 </row>
883 <row>
884 <entry><option>-XEmptyDataDecls</option></entry>
885 <entry>Enable empty data declarations.</entry>
886 <entry>dynamic</entry>
887 <entry><option>-XNoEmptyDataDecls</option></entry>
888 </row>
889 <row>
890 <entry><option>-XParallelListComp</option></entry>
891 <entry>Enable <link linkend="parallel-list-comprehensions">parallel list comprehensions</link>.</entry>
892 <entry>dynamic</entry>
893 <entry><option>-XNoParallelListComp</option></entry>
894 </row>
895 <row>
896 <entry><option>-XTransformListComp</option></entry>
897 <entry>Enable <link linkend="generalised-list-comprehensions">generalised list comprehensions</link>.</entry>
898 <entry>dynamic</entry>
899 <entry><option>-XNoTransformListComp</option></entry>
900 </row>
901 <row>
902 <entry><option>-XUnliftedFFITypes</option></entry>
903 <entry>Enable unlifted FFI types.</entry>
904 <entry>dynamic</entry>
905 <entry><option>-XNoUnliftedFFITypes</option></entry>
906 </row>
907 <row>
908 <entry><option>-XLiberalTypeSynonyms</option></entry>
909 <entry>Enable <link linkend="type-synonyms">liberalised type synonyms</link>.</entry>
910 <entry>dynamic</entry>
911 <entry><option>-XNoLiberalTypeSynonyms</option></entry>
912 </row>
913 <row>
914 <entry><option>-XTypeOperators</option></entry>
915 <entry>Enable type operators.</entry>
916 <entry>dynamic</entry>
917 <entry><option>-XNoTypeOperators</option></entry>
918 </row>
919 <row>
920 <entry><option>-XDoRec</option></entry>
921 <entry>Enable <link linkend="recursive-do-notation">recursive do notation</link>.</entry>
922 <entry>dynamic</entry>
923 <entry><option>-XNoDoRec</option></entry>
924 </row>
925 <row>
926 <entry><option>-XRecursiveDo</option></entry>
927 <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>
928 <entry>dynamic</entry>
929 <entry><option>-XNoRecursiveDo</option></entry>
930 </row>
931 <row>
932 <entry><option>-XPArr</option></entry>
933 <entry>Enable parallel arrays.</entry>
934 <entry>dynamic</entry>
935 <entry><option>-XNoPArr</option></entry>
936 </row>
937 <row>
938 <entry><option>-XRecordWildCards</option></entry>
939 <entry>Enable <link linkend="record-wildcards">record wildcards</link>.</entry>
940 <entry>dynamic</entry>
941 <entry><option>-XNoRecordWildCards</option></entry>
942 </row>
943 <row>
944 <entry><option>-XNamedFieldPuns</option></entry>
945 <entry>Enable <link linkend="record-puns">record puns</link>.</entry>
946 <entry>dynamic</entry>
947 <entry><option>-XNoNamedFieldPuns</option></entry>
948 </row>
949 <row>
950 <entry><option>-XDisambiguateRecordFields</option></entry>
951 <entry>Enable <link linkend="disambiguate-fields">record field disambiguation</link>. </entry>
952 <entry>dynamic</entry>
953 <entry><option>-XNoDisambiguateRecordFields</option></entry>
954 </row>
955 <row>
956 <entry><option>-XUnboxedTuples</option></entry>
957 <entry>Enable <link linkend="unboxed-tuples">unboxed tuples</link>.</entry>
958 <entry>dynamic</entry>
959 <entry><option>-XNoUnboxedTuples</option></entry>
960 </row>
961 <row>
962 <entry><option>-XStandaloneDeriving</option></entry>
963 <entry>Enable <link linkend="stand-alone-deriving">standalone deriving</link>.</entry>
964 <entry>dynamic</entry>
965 <entry><option>-XNoStandaloneDeriving</option></entry>
966 </row>
967 <row>
968 <entry><option>-XDeriveDataTypeable</option></entry>
969 <entry>Enable <link linkend="deriving-typeable">deriving for the Data and Typeable classes</link>.</entry>
970 <entry>dynamic</entry>
971 <entry><option>-XNoDeriveDataTypeable</option></entry>
972 </row>
973 <row>
974 <entry><option>-XGeneralizedNewtypeDeriving</option></entry>
975 <entry>Enable <link linkend="newtype-deriving">newtype deriving</link>.</entry>
976 <entry>dynamic</entry>
977 <entry><option>-XNoGeneralizedNewtypeDeriving</option></entry>
978 </row>
979 <row>
980 <entry><option>-XTypeSynonymInstances</option></entry>
981 <entry>Enable <link linkend="flexible-instance-head">type synonyms in instance heads</link>.</entry>
982 <entry>dynamic</entry>
983 <entry><option>-XNoTypeSynonymInstances</option></entry>
984 </row>
985 <row>
986 <entry><option>-XFlexibleContexts</option></entry>
987 <entry>Enable <link linkend="flexible-contexts">flexible contexts</link>.</entry>
988 <entry>dynamic</entry>
989 <entry><option>-XNoFlexibleContexts</option></entry>
990 </row>
991 <row>
992 <entry><option>-XFlexibleInstances</option></entry>
993 <entry>Enable <link linkend="instance-rules">flexible instances</link>.
994 Implies <option>-XTypeSynonymInstances</option> </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-identities</option></entry>
1112 <entry>warn about uses of Prelude numeric conversions that are probably
1113 the identity (and hence could be omitted)</entry>
1114 <entry>dynamic</entry>
1115 <entry><option>-fno-warn-identities</option></entry>
1116 </row>
1117
1118 <row>
1119 <entry><option>-fwarn-implicit-prelude</option></entry>
1120 <entry>warn when the Prelude is implicitly imported</entry>
1121 <entry>dynamic</entry>
1122 <entry><option>-fno-warn-implicit-prelude</option></entry>
1123 </row>
1124
1125 <row>
1126 <entry><option>-fwarn-incomplete-patterns</option></entry>
1127 <entry>warn when a pattern match could fail</entry>
1128 <entry>dynamic</entry>
1129 <entry><option>-fno-warn-incomplete-patterns</option></entry>
1130 </row>
1131
1132 <row>
1133 <entry><option>-fwarn-incomplete-uni-patterns</option></entry>
1134 <entry>warn when a pattern match in a lambda expression or pattern binding could fail</entry>
1135 <entry>dynamic</entry>
1136 <entry><option>-fno-warn-incomplete-uni-patterns</option></entry>
1137 </row>
1138
1139 <row>
1140 <entry><option>-fwarn-incomplete-record-updates</option></entry>
1141 <entry>warn when a record update could fail</entry>
1142 <entry>dynamic</entry>
1143 <entry><option>-fno-warn-incomplete-record-updates</option></entry>
1144 </row>
1145
1146 <row>
1147 <entry><option>-fwarn-lazy-unlifted-bindings</option></entry>
1148 <entry>warn when a pattern binding looks lazy but must be strict</entry>
1149 <entry>dynamic</entry>
1150 <entry><option>-fno-warn-lazy-unlifted-bindings</option></entry>
1151 </row>
1152
1153 <row>
1154 <entry><option>-fwarn-missing-fields</option></entry>
1155 <entry>warn when fields of a record are uninitialised</entry>
1156 <entry>dynamic</entry>
1157 <entry><option>-fno-warn-missing-fields</option></entry>
1158 </row>
1159
1160 <row>
1161 <entry><option>-fwarn-missing-import-lists</option></entry>
1162 <entry>warn when an import declaration does not explicitly
1163 list all the names brought into scope</entry>
1164 <entry>dynamic</entry>
1165 <entry><option>-fnowarn-missing-import-lists</option></entry>
1166 </row>
1167
1168 <row>
1169 <entry><option>-fwarn-missing-methods</option></entry>
1170 <entry>warn when class methods are undefined</entry>
1171 <entry>dynamic</entry>
1172 <entry><option>-fno-warn-missing-methods</option></entry>
1173 </row>
1174
1175 <row>
1176 <entry><option>-fwarn-missing-signatures</option></entry>
1177 <entry>warn about top-level functions without signatures</entry>
1178 <entry>dynamic</entry>
1179 <entry><option>-fno-warn-missing-signatures</option></entry>
1180 </row>
1181
1182 <row>
1183 <entry><option>-fwarn-name-shadowing</option></entry>
1184 <entry>warn when names are shadowed</entry>
1185 <entry>dynamic</entry>
1186 <entry><option>-fno-warn-name-shadowing</option></entry>
1187 </row>
1188
1189 <row>
1190 <entry><option>-fwarn-orphans</option></entry>
1191 <entry>warn when the module contains <link linkend="orphan-modules">orphan instance declarations
1192 or rewrite rules</link></entry>
1193 <entry>dynamic</entry>
1194 <entry><option>-fno-warn-orphans</option></entry>
1195 </row>
1196
1197 <row>
1198 <entry><option>-fwarn-overlapping-patterns</option></entry>
1199 <entry>warn about overlapping patterns</entry>
1200 <entry>dynamic</entry>
1201 <entry><option>-fno-warn-overlapping-patterns</option></entry>
1202 </row>
1203
1204 <row>
1205 <entry><option>-fwarn-tabs</option></entry>
1206 <entry>warn if there are tabs in the source file</entry>
1207 <entry>dynamic</entry>
1208 <entry><option>-fno-warn-tabs</option></entry>
1209 </row>
1210
1211 <row>
1212 <entry><option>-fwarn-type-defaults</option></entry>
1213 <entry>warn when defaulting happens</entry>
1214 <entry>dynamic</entry>
1215 <entry><option>-fno-warn-type-defaults</option></entry>
1216 </row>
1217
1218 <row>
1219 <entry><option>-fwarn-monomorphism-restriction</option></entry>
1220 <entry>warn when the Monomorphism Restriction is applied</entry>
1221 <entry>dynamic</entry>
1222 <entry><option>-fno-warn-monomorphism-restriction</option></entry>
1223 </row>
1224
1225 <row>
1226 <entry><option>-fwarn-unused-binds</option></entry>
1227 <entry>warn about bindings that are unused</entry>
1228 <entry>dynamic</entry>
1229 <entry><option>-fno-warn-unused-binds</option></entry>
1230 </row>
1231
1232 <row>
1233 <entry><option>-fwarn-unused-imports</option></entry>
1234 <entry>warn about unnecessary imports</entry>
1235 <entry>dynamic</entry>
1236 <entry><option>-fno-warn-unused-imports</option></entry>
1237 </row>
1238
1239 <row>
1240 <entry><option>-fwarn-unused-matches</option></entry>
1241 <entry>warn about variables in patterns that aren't used</entry>
1242 <entry>dynamic</entry>
1243 <entry><option>-fno-warn-unused-matches</option></entry>
1244 </row>
1245
1246 <row>
1247 <entry><option>-fwarn-unused-do-bind</option></entry>
1248 <entry>warn about do bindings that appear to throw away values of types other than <literal>()</literal></entry>
1249 <entry>dynamic</entry>
1250 <entry><option>-fno-warn-unused-do-bind</option></entry>
1251 </row>
1252
1253 <row>
1254 <entry><option>-fwarn-wrong-do-bind</option></entry>
1255 <entry>warn about do bindings that appear to throw away monadic values that you should have bound instead</entry>
1256 <entry>dynamic</entry>
1257 <entry><option>-fno-warn-wrong-do-bind</option></entry>
1258 </row>
1259
1260 </tbody>
1261 </tgroup>
1262 </informaltable>
1263
1264 </sect2>
1265 <sect2>
1266 <title>Optimisation levels</title>
1267
1268 <para><xref linkend="options-optimise"/></para>
1269
1270 <informaltable>
1271 <tgroup cols="4" align="left" colsep="1" rowsep="1">
1272 <thead>
1273 <row>
1274 <entry>Flag</entry>
1275 <entry>Description</entry>
1276 <entry>Static/Dynamic</entry>
1277 <entry>Reverse</entry>
1278 </row>
1279 </thead>
1280 <tbody>
1281 <row>
1282 <entry><option>-O</option></entry>
1283 <entry>Enable default optimisation (level 1)</entry>
1284 <entry>dynamic</entry>
1285 <entry><option>-O0</option></entry>
1286 </row>
1287 <row>
1288 <entry><option>-O</option><replaceable>n</replaceable></entry>
1289 <entry>Set optimisation level <replaceable>n</replaceable></entry>
1290 <entry>dynamic</entry>
1291 <entry><option>-O0</option></entry>
1292 </row>
1293 </tbody>
1294 </tgroup>
1295 </informaltable>
1296
1297 </sect2>
1298 <sect2>
1299 <title>Individual optimisations</title>
1300
1301 <para><xref linkend="options-f"/></para>
1302
1303 <informaltable>
1304 <tgroup cols="4" align="left" colsep="1" rowsep="1">
1305 <thead>
1306 <row>
1307 <entry>Flag</entry>
1308 <entry>Description</entry>
1309 <entry>Static/Dynamic</entry>
1310 <entry>Reverse</entry>
1311 </row>
1312 </thead>
1313 <tbody>
1314 <row>
1315 <entry><option>-fcase-merge</option></entry>
1316 <entry>Enable case-merging. Implied by <option>-O</option>.</entry>
1317 <entry>dynamic</entry>
1318 <entry><option>-fno-case-merge</option></entry>
1319 </row>
1320
1321 <row>
1322 <entry><option>-fdicts-strict</option></entry>
1323 <entry>Make dictionaries strict</entry>
1324 <entry>static</entry>
1325 <entry><option>-fno-dicts-strict</option></entry>
1326 </row>
1327
1328 <row>
1329 <entry><option>-fmethod-sharing</option></entry>
1330 <entry>Share specialisations of overloaded functions (default)</entry>
1331 <entry>dynamic</entry>
1332 <entry><option>-fno-method-sharing</option></entry>
1333 </row>
1334
1335 <row>
1336 <entry><option>-fdo-eta-reduction</option></entry>
1337 <entry>Enable eta-reduction. Implied by <option>-O</option>.</entry>
1338 <entry>dynamic</entry>
1339 <entry><option>-fno-do-eta-reduction</option></entry>
1340 </row>
1341
1342 <row>
1343 <entry><option>-fdo-lambda-eta-expansion</option></entry>
1344 <entry>Enable lambda eta-reduction</entry>
1345 <entry>dynamic</entry>
1346 <entry><option>-fno-do-lambda-eta-expansion</option></entry>
1347 </row>
1348
1349 <row>
1350 <entry><option>-fexcess-precision</option></entry>
1351 <entry>Enable excess intermediate precision</entry>
1352 <entry>dynamic</entry>
1353 <entry><option>-fno-excess-precision</option></entry>
1354 </row>
1355
1356 <row>
1357 <entry><option>-fignore-asserts</option></entry>
1358 <entry>Ignore assertions in the source</entry>
1359 <entry>dynamic</entry>
1360 <entry><option>-fno-ignore-asserts</option></entry>
1361 </row>
1362
1363 <row>
1364 <entry><option>-fignore-interface-pragmas</option></entry>
1365 <entry>Ignore pragmas in interface files</entry>
1366 <entry>dynamic</entry>
1367 <entry><option>-fno-ignore-interface-pragmas</option></entry>
1368 </row>
1369
1370 <row>
1371 <entry><option>-fomit-interface-pragmas</option></entry>
1372 <entry>Don't generate interface pragmas</entry>
1373 <entry>dynamic</entry>
1374 <entry><option>-fno-omit-interface-pragmas</option></entry>
1375 </row>
1376
1377 <row>
1378 <entry><option>-fmax-worker-args</option></entry>
1379 <entry>If a worker has that many arguments, none will be
1380 unpacked anymore (default: 10)</entry>
1381 <entry>static</entry>
1382 <entry>-</entry>
1383 </row>
1384
1385 <row>
1386 <entry><option>-fsimplifier-phases</option></entry>
1387 <entry>Set the number of phases for the simplifier (default 2).
1388 Ignored with <option>-O0</option>.</entry>
1389 <entry>dynamic</entry>
1390 <entry>-</entry>
1391 </row>
1392
1393 <row>
1394 <entry><option>-fmax-simplifier-iterations</option></entry>
1395 <entry>Set the max iterations for the simplifier</entry>
1396 <entry>dynamic</entry>
1397 <entry>-</entry>
1398 </row>
1399
1400 <row>
1401 <entry><option>-fno-state-hack</option></entry>
1402 <entry>Turn off the "state hack" whereby any lambda with a real-world state token
1403 as argument is considered to be single-entry. Hence OK to inline things inside it.</entry>
1404 <entry>static</entry>
1405 <entry>-</entry>
1406 </row>
1407
1408 <row>
1409 <entry><option>-fcse</option></entry>
1410 <entry>Turn on common sub-expression elimination. Implied by <option>-O</option>.</entry>
1411 <entry>dynamic</entry>
1412 <entry>-fno-cse</entry>
1413 </row>
1414
1415 <row>
1416 <entry><option>-fspecialise</option></entry>
1417 <entry>Turn on specialisation of overloaded functions. Implied by <option>-O</option>.</entry>
1418 <entry>dynamic</entry>
1419 <entry>-fno-specialise</entry>
1420 </row>
1421
1422 <row>
1423 <entry><option>-ffull-laziness</option></entry>
1424 <entry>Turn on full laziness (floating bindings outwards). Implied by <option>-O</option>.</entry>
1425 <entry>dynamic</entry>
1426 <entry>-fno-full-laziness</entry>
1427 </row>
1428
1429 <row>
1430 <entry><option>-ffloat-in</option></entry>
1431 <entry>Turn on the float-in transformation. Implied by <option>-O</option>.</entry>
1432 <entry>dynamic</entry>
1433 <entry>-fno-float-in</entry>
1434 </row>
1435
1436 <row>
1437 <entry><option>-fenable-rewrite-rules</option></entry>
1438 <entry>Switch on all rewrite rules (including rules
1439 generated by automatic specialisation of overloaded functions).
1440 Implied by <option>-O</option>. </entry>
1441 <entry>dynamic</entry>
1442 <entry><option>-fno-enable-rewrite-rules</option></entry>
1443 </row>
1444
1445 <row>
1446 <entry><option>-fstrictness</option></entry>
1447 <entry>Turn on strictness analysis. Implied by <option>-O</option>.</entry>
1448 <entry>dynamic</entry>
1449 <entry>-fno-strictness</entry>
1450 </row>
1451
1452 <row>
1453 <entry><option>-fstrictness=before</option>=<replaceable>n</replaceable></entry>
1454 <entry>Run an additional strictness analysis before simplifier
1455 phase <replaceable>n</replaceable></entry>
1456 <entry>dynamic</entry>
1457 <entry>-</entry>
1458 </row>
1459
1460 <row>
1461 <entry><option>-fspec-constr</option></entry>
1462 <entry>Turn on the SpecConstr transformation. Implied by <option>-O2</option>.</entry>
1463 <entry>dynamic</entry>
1464 <entry>-fno-spec-constr</entry>
1465 </row>
1466
1467 <row>
1468 <entry><option>-fspec-constr-threshold</option>=<replaceable>n</replaceable></entry>
1469 <entry>Set the size threshold for the SpecConstr transformation to <replaceable>n</replaceable> (default: 200)</entry>
1470 <entry>static</entry>
1471 <entry><option>-fno-spec-constr-threshold</option></entry>
1472 </row>
1473
1474 <row>
1475 <entry><option>-fspec-constr-count</option>=<replaceable>n</replaceable></entry>
1476 <entry>Set to <replaceable>n</replaceable> (default: 3) the maximum number of
1477 specialisations that will be created for any one function
1478 by the SpecConstr transformation</entry>
1479 <entry>static</entry>
1480 <entry><option>-fno-spec-constr-count</option></entry>
1481 </row>
1482
1483 <row>
1484 <entry><option>-fliberate-case</option></entry>
1485 <entry>Turn on the liberate-case transformation. Implied by <option>-O2</option>.</entry>
1486 <entry>dynamic</entry>
1487 <entry>-fno-liberate-case</entry>
1488 </row>
1489
1490 <row>
1491 <entry><option>-fstatic-argument-transformation</option></entry>
1492 <entry>Turn on the static argument transformation. Implied by <option>-O2</option>.</entry>
1493 <entry>dynamic</entry>
1494 <entry>-fno-static-argument-transformation</entry>
1495 </row>
1496
1497 <row>
1498 <entry><option>-fliberate-case-threshold</option>=<replaceable>n</replaceable></entry>
1499 <entry>Set the size threshold for the liberate-case transformation to <replaceable>n</replaceable> (default: 200)</entry>
1500 <entry>static</entry>
1501 <entry><option>-fno-liberate-case-threshold</option></entry>
1502 </row>
1503
1504 <row>
1505 <entry><option>-funbox-strict-fields</option></entry>
1506 <entry>Flatten strict constructor fields</entry>
1507 <entry>dynamic</entry>
1508 <entry><option>-fno-unbox-strict-fields</option></entry>
1509 </row>
1510
1511 <row>
1512 <entry><option>-funfolding-creation-threshold</option></entry>
1513 <entry>Tweak unfolding settings</entry>
1514 <entry>static</entry>
1515 <entry><option>-fno-unfolding-creation-threshold</option></entry>
1516 </row>
1517
1518 <row>
1519 <entry><option>-funfolding-fun-discount</option></entry>
1520 <entry>Tweak unfolding settings</entry>
1521 <entry>static</entry>
1522 <entry><option>-fno-unfolding-fun-discount</option></entry>
1523 </row>
1524
1525 <row>
1526 <entry><option>-funfolding-keeness-factor</option></entry>
1527 <entry>Tweak unfolding settings</entry>
1528 <entry>static</entry>
1529 <entry><option>-fno-unfolding-keeness-factor</option></entry>
1530 </row>
1531
1532 <row>
1533 <entry><option>-funfolding-use-threshold</option></entry>
1534 <entry>Tweak unfolding settings</entry>
1535 <entry>static</entry>
1536 <entry><option>-fno-unfolding-use-threshold</option></entry>
1537 </row>
1538
1539 <row>
1540 <entry><option>-fno-pre-inlining</option></entry>
1541 <entry>Turn off pre-inlining</entry>
1542 <entry>static</entry>
1543 <entry>-</entry>
1544 </row>
1545
1546 <row>
1547 <entry><option>-fno-opt-coercion</option></entry>
1548 <entry>Turn off the coercion optimiser</entry>
1549 <entry>static</entry>
1550 <entry>-</entry>
1551 </row>
1552
1553 <row>
1554 <entry><option>-feager-blackholing</option></entry>
1555 <entry>Turn on <link linkend="parallel-compile-options">eager blackholing</link></entry>
1556 <entry>dynamic</entry>
1557 <entry>-</entry>
1558 </row>
1559 </tbody>
1560 </tgroup>
1561 </informaltable>
1562 </sect2>
1563
1564 <sect2>
1565 <title>Profiling options</title>
1566
1567 <para><xref linkend="profiling"/></para>
1568
1569 <informaltable>
1570 <tgroup cols="4" align="left" colsep="1" rowsep="1">
1571 <thead>
1572 <row>
1573 <entry>Flag</entry>
1574 <entry>Description</entry>
1575 <entry>Static/Dynamic</entry>
1576 <entry>Reverse</entry>
1577 </row>
1578 </thead>
1579 <tbody>
1580 <row>
1581 <entry><option>-auto</option></entry>
1582 <entry>Auto-add <literal>_scc_</literal>s to all
1583 exported functions not marked INLINE</entry>
1584 <entry>dynamic</entry>
1585 <entry><option>-no-auto</option></entry>
1586 </row>
1587 <row>
1588 <entry><option>-auto-all</option></entry>
1589 <entry>Auto-add <literal>_scc_</literal>s to all
1590 top-level functions not marked INLINE</entry>
1591 <entry>dynamic</entry>
1592 <entry><option>-no-auto-all</option></entry>
1593 </row>
1594 <row>
1595 <entry><option>-caf-all</option></entry>
1596 <entry>Auto-add <literal>_scc_</literal>s to all CAFs</entry>
1597 <entry>dynamic</entry>
1598 <entry><option>-no-caf-all</option></entry>
1599 </row>
1600 <row>
1601 <entry><option>-prof</option></entry>
1602 <entry>Turn on profiling</entry>
1603 <entry>static</entry>
1604 <entry>-</entry>
1605 </row>
1606 <row>
1607 <entry><option>-ticky</option></entry>
1608 <entry><link linkend="ticky-ticky">Turn on ticky-ticky profiling</link></entry>
1609 <entry>static</entry>
1610 <entry>-</entry>
1611 </row>
1612 </tbody>
1613 </tgroup>
1614 </informaltable>
1615 </sect2>
1616
1617 <sect2>
1618 <title>Program coverage options</title>
1619
1620 <para><xref linkend="hpc"/></para>
1621
1622 <informaltable>
1623 <tgroup cols="4" align="left" colsep="1" rowsep="1">
1624 <thead>
1625 <row>
1626 <entry>Flag</entry>
1627 <entry>Description</entry>
1628 <entry>Static/Dynamic</entry>
1629 <entry>Reverse</entry>
1630 </row>
1631 </thead>
1632 <tbody>
1633 <row>
1634 <entry><option>-fhpc</option></entry>
1635 <entry>Turn on Haskell program coverage instrumentation</entry>
1636 <entry>static</entry>
1637 <entry><option>-</option></entry>
1638 </row>
1639 <row>
1640 <entry><option>-hpcdir dir</option></entry>
1641 <entry>Directory to deposit .mix files during compilation (default is .hpc)</entry>
1642 <entry>dynamic</entry>
1643 <entry><option>-</option></entry>
1644 </row>
1645 </tbody>
1646 </tgroup>
1647 </informaltable>
1648 </sect2>
1649
1650 <sect2>
1651 <title>Haskell pre-processor options</title>
1652
1653 <para><xref linkend="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>-F</option></entry>
1668 <entry>
1669 Enable the use of a pre-processor
1670 (set with <option>-pgmF</option>)
1671 </entry>
1672 <entry>dynamic</entry>
1673 <entry>-</entry>
1674 </row>
1675 </tbody>
1676 </tgroup>
1677 </informaltable>
1678 </sect2>
1679
1680 <sect2>
1681 <title>C pre-processor options</title>
1682
1683 <para><xref linkend="c-pre-processor"/></para>
1684
1685 <informaltable>
1686 <tgroup cols="4" align="left" colsep="1" rowsep="1">
1687 <thead>
1688 <row>
1689 <entry>Flag</entry>
1690 <entry>Description</entry>
1691 <entry>Static/Dynamic</entry>
1692 <entry>Reverse</entry>
1693 </row>
1694 </thead>
1695 <tbody>
1696 <row>
1697 <entry><option>-cpp</option></entry>
1698 <entry>Run the C pre-processor on Haskell source files</entry>
1699 <entry>dynamic</entry>
1700 <entry>-</entry>
1701 </row>
1702 <row>
1703 <entry><option>-D</option><replaceable>symbol</replaceable><optional>=<replaceable>value</replaceable></optional></entry>
1704 <entry>Define a symbol in the C pre-processor</entry>
1705 <entry>dynamic</entry>
1706 <entry><option>-U</option><replaceable>symbol</replaceable></entry>
1707 </row>
1708 <row>
1709 <entry><option>-U</option><replaceable>symbol</replaceable></entry>
1710 <entry>Undefine a symbol in the C pre-processor</entry>
1711 <entry>dynamic</entry>
1712 <entry>-</entry>
1713 </row>
1714 <row>
1715 <entry><option>-I</option><replaceable>dir</replaceable></entry>
1716 <entry>Add <replaceable>dir</replaceable> to the
1717 directory search list for <literal>#include</literal> files</entry>
1718 <entry>dynamic</entry>
1719 <entry>-</entry>
1720 </row>
1721 </tbody>
1722 </tgroup>
1723 </informaltable>
1724 </sect2>
1725
1726 <sect2>
1727 <title>Code generation options</title>
1728
1729 <para><xref linkend="options-codegen"/></para>
1730
1731 <informaltable>
1732 <tgroup cols="4" align="left" colsep="1" rowsep="1">
1733 <thead>
1734 <row>
1735 <entry>Flag</entry>
1736 <entry>Description</entry>
1737 <entry>Static/Dynamic</entry>
1738 <entry>Reverse</entry>
1739 </row>
1740 </thead>
1741 <tbody>
1742 <row>
1743 <entry><option>-fasm</option></entry>
1744 <entry>Use the native code generator</entry>
1745 <entry>dynamic</entry>
1746 <entry>-fllvm</entry>
1747 </row>
1748 <row>
1749 <entry><option>-fllvm</option></entry>
1750 <entry>Compile via LLVM</entry>
1751 <entry>dynamic</entry>
1752 <entry>-fasm</entry>
1753 </row>
1754 <row>
1755 <entry><option>-fno-code</option></entry>
1756 <entry>Omit code generation</entry>
1757 <entry>dynamic</entry>
1758 <entry>-</entry>
1759 </row>
1760 <row>
1761 <entry><option>-fbyte-code</option></entry>
1762 <entry>Generate byte-code</entry>
1763 <entry>dynamic</entry>
1764 <entry>-</entry>
1765 </row>
1766 <row>
1767 <entry><option>-fobject-code</option></entry>
1768 <entry>Generate object code</entry>
1769 <entry>dynamic</entry>
1770 <entry>-</entry>
1771 </row>
1772 </tbody>
1773 </tgroup>
1774 </informaltable>
1775 </sect2>
1776
1777 <sect2>
1778 <title>Linking options</title>
1779
1780 <para><xref linkend="options-linker"/></para>
1781
1782 <informaltable>
1783 <tgroup cols="4" align="left" colsep="1" rowsep="1">
1784 <thead>
1785 <row>
1786 <entry>Flag</entry>
1787 <entry>Description</entry>
1788 <entry>Static/Dynamic</entry>
1789 <entry>Reverse</entry>
1790 </row>
1791 </thead>
1792 <tbody>
1793 <row>
1794 <entry><option>-shared</option></entry>
1795 <entry>Generate a shared library (as opposed to an executable)</entry>
1796 <entry>dynamic</entry>
1797 <entry>-</entry>
1798 </row>
1799 <row>
1800 <entry><option>-fPIC</option></entry>
1801 <entry>Generate position-independent code (where available)</entry>
1802 <entry>static</entry>
1803 <entry>-</entry>
1804 </row>
1805 <row>
1806 <entry><option>-dynamic</option></entry>
1807 <entry>Use dynamic Haskell libraries (if available)</entry>
1808 <entry>static</entry>
1809 <entry>-</entry>
1810 </row>
1811 <row>
1812 <entry><option>-dynload</option></entry>
1813 <entry>Selects one of a number of modes for finding shared
1814 libraries at runtime.</entry>
1815 <entry>static</entry>
1816 <entry>-</entry>
1817 </row>
1818 <row>
1819 <entry><option>-framework</option> <replaceable>name</replaceable></entry>
1820 <entry>On Darwin/MacOS X only, link in the framework <replaceable>name</replaceable>.
1821 This option corresponds to the <option>-framework</option> option for Apple's Linker.</entry>
1822 <entry>dynamic</entry>
1823 <entry>-</entry>
1824 </row>
1825 <row>
1826 <entry><option>-framework-path</option> <replaceable>name</replaceable></entry>
1827 <entry>On Darwin/MacOS X only, add <replaceable>dir</replaceable> to the list of
1828 directories searched for frameworks.
1829 This option corresponds to the <option>-F</option> option for Apple's Linker.</entry>
1830 <entry>dynamic</entry>
1831 <entry>-</entry>
1832 </row>
1833 <row>
1834 <entry><option>-l</option><replaceable>lib</replaceable></entry>
1835 <entry>Link in library <replaceable>lib</replaceable></entry>
1836 <entry>dynamic</entry>
1837 <entry>-</entry>
1838 </row>
1839 <row>
1840 <entry><option>-L</option><replaceable>dir</replaceable></entry>
1841 <entry>Add <replaceable>dir</replaceable> to the list of
1842 directories searched for libraries</entry>
1843 <entry>dynamic</entry>
1844 <entry>-</entry>
1845 </row>
1846 <row>
1847 <entry><option>-main-is</option></entry>
1848 <entry>Set main module and function</entry>
1849 <entry>dynamic</entry>
1850 <entry>-</entry>
1851 </row>
1852 <row>
1853 <entry><option>--mk-dll</option></entry>
1854 <entry>DLL-creation mode (Windows only)</entry>
1855 <entry>dynamic</entry>
1856 <entry>-</entry>
1857 </row>
1858 <row>
1859 <entry><option>-no-hs-main</option></entry>
1860 <entry>Don't assume this program contains <literal>main</literal></entry>
1861 <entry>dynamic</entry>
1862 <entry>-</entry>
1863 </row>
1864 <row>
1865 <entry><option>-rtsopts</option>, <option>-rtsopts={none,some,all}</option></entry>
1866 <entry>Control whether the RTS behaviour can be tweaked via command-line
1867 flags and the <literal>GHCRTS</literal> environment
1868 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>
1869 <entry>dynamic</entry>
1870 <entry>-</entry>
1871 </row>
1872 <row>
1873 <entry><option>-with-rtsopts=<replaceable>opts</replaceable></option></entry>
1874 <entry>Set the default RTS options to
1875 <replaceable>opts</replaceable>.</entry>
1876 <entry>dynamic</entry>
1877 <entry>-</entry>
1878 </row>
1879 <row>
1880 <entry><option>-no-link</option></entry>
1881 <entry>Omit linking</entry>
1882 <entry>dynamic</entry>
1883 <entry>-</entry>
1884 </row>
1885 <row>
1886 <entry><option>-split-objs</option></entry>
1887 <entry>Split objects (for libraries)</entry>
1888 <entry>dynamic</entry>
1889 <entry>-</entry>
1890 </row>
1891 <row>
1892 <entry><option>-static</option></entry>
1893 <entry>Use static Haskell libraries</entry>
1894 <entry>static</entry>
1895 <entry>-</entry>
1896 </row>
1897 <row>
1898 <entry><option>-threaded</option></entry>
1899 <entry>Use the threaded runtime</entry>
1900 <entry>static</entry>
1901 <entry>-</entry>
1902 </row>
1903 <row>
1904 <entry><option>-debug</option></entry>
1905 <entry>Use the debugging runtime</entry>
1906 <entry>static</entry>
1907 <entry>-</entry>
1908 </row>
1909 <row>
1910 <entry><option>-eventlog</option></entry>
1911 <entry>Enable runtime event tracing</entry>
1912 <entry>static</entry>
1913 <entry>-</entry>
1914 </row>
1915 <row>
1916 <entry><option>-fno-gen-manifest</option></entry>
1917 <entry>Do not generate a manifest file (Windows only)</entry>
1918 <entry>dynamic</entry>
1919 <entry>-</entry>
1920 </row>
1921 <row>
1922 <entry><option>-fno-embed-manifest</option></entry>
1923 <entry>Do not embed the manifest in the executable (Windows only)</entry>
1924 <entry>dynamic</entry>
1925 <entry>-</entry>
1926 </row>
1927 <row>
1928 <entry><option>-fno-shared-implib</option></entry>
1929 <entry>Don't generate an import library for a DLL (Windows only)</entry>
1930 <entry>dynamic</entry>
1931 <entry>-</entry>
1932 </row>
1933 <row>
1934 <entry><option>-dylib-install-name</option> <replaceable>path</replaceable></entry>
1935 <entry>Set the install name (via <literal>-install_name</literal> passed to Apple's
1936 linker), specifying the full install path of the library file. Any libraries
1937 or executables that link with it later will pick up that path as their
1938 runtime search location for it. (Darwin/MacOS X only)</entry>
1939 <entry>dynamic</entry>
1940 <entry>-</entry>
1941 </row>
1942 </tbody>
1943 </tgroup>
1944 </informaltable>
1945 </sect2>
1946
1947 <sect2>
1948 <title>Replacing phases</title>
1949
1950 <para><xref linkend="replacing-phases"/></para>
1951
1952 <informaltable>
1953 <tgroup cols="4" align="left" colsep="1" rowsep="1">
1954 <thead>
1955 <row>
1956 <entry>Flag</entry>
1957 <entry>Description</entry>
1958 <entry>Static/Dynamic</entry>
1959 <entry>Reverse</entry>
1960 </row>
1961 </thead>
1962 <tbody>
1963 <row>
1964 <entry><option>-pgmL</option> <replaceable>cmd</replaceable></entry>
1965 <entry>Use <replaceable>cmd</replaceable> as the literate pre-processor</entry>
1966 <entry>dynamic</entry>
1967 <entry>-</entry>
1968 </row>
1969 <row>
1970 <entry><option>-pgmP</option> <replaceable>cmd</replaceable></entry>
1971 <entry>Use <replaceable>cmd</replaceable> as the C
1972 pre-processor (with <option>-cpp</option> only)</entry>
1973 <entry>dynamic</entry>
1974 <entry>-</entry>
1975 </row>
1976 <row>
1977 <entry><option>-pgmc</option> <replaceable>cmd</replaceable></entry>
1978 <entry>Use <replaceable>cmd</replaceable> as the C compiler</entry>
1979 <entry>dynamic</entry>
1980 <entry>-</entry>
1981 <row>
1982 <entry><option>-pgmlo</option> <replaceable>cmd</replaceable></entry>
1983 <entry>Use <replaceable>cmd</replaceable> as the LLVM optimiser</entry>
1984 <entry>dynamic</entry>
1985 <entry>-</entry>
1986 </row>
1987 <row>
1988 <entry><option>-pgmlc</option> <replaceable>cmd</replaceable></entry>
1989 <entry>Use <replaceable>cmd</replaceable> as the LLVM compiler</entry>
1990 <entry>dynamic</entry>
1991 <entry>-</entry>
1992 </row>
1993 </row>
1994 <row>
1995 <entry><option>-pgms</option> <replaceable>cmd</replaceable></entry>
1996 <entry>Use <replaceable>cmd</replaceable> as the splitter</entry>
1997 <entry>dynamic</entry>
1998 <entry>-</entry>
1999 </row>
2000 <row>
2001 <entry><option>-pgma</option> <replaceable>cmd</replaceable></entry>
2002 <entry>Use <replaceable>cmd</replaceable> as the assembler</entry>
2003 <entry>dynamic</entry>
2004 <entry>-</entry>
2005 </row>
2006 <row>
2007 <entry><option>-pgml</option> <replaceable>cmd</replaceable></entry>
2008 <entry>Use <replaceable>cmd</replaceable> as the linker</entry>
2009 <entry>dynamic</entry>
2010 <entry>-</entry>
2011 </row>
2012 <row>
2013 <entry><option>-pgmdll</option> <replaceable>cmd</replaceable></entry>
2014 <entry>Use <replaceable>cmd</replaceable> as the DLL generator</entry>
2015 <entry>dynamic</entry>
2016 <entry>-</entry>
2017 </row>
2018 <row>
2019 <entry><option>-pgmF</option> <replaceable>cmd</replaceable></entry>
2020 <entry>Use <replaceable>cmd</replaceable> as the pre-processor
2021 (with <option>-F</option> only)</entry>
2022 <entry>dynamic</entry>
2023 <entry>-</entry>
2024 </row>
2025 <row>
2026 <entry><option>-pgmwindres</option> <replaceable>cmd</replaceable></entry>
2027 <entry>Use <replaceable>cmd</replaceable> as the program for
2028 embedding manifests on Windows.</entry>
2029 <entry>dynamic</entry>
2030 <entry>-</entry>
2031 </row>
2032 </tbody>
2033 </tgroup>
2034 </informaltable>
2035 <indexterm><primary><option>-pgmL</option></primary></indexterm>
2036 <indexterm><primary><option>-pgmP</option></primary></indexterm>
2037 <indexterm><primary><option>-pgmc</option></primary></indexterm>
2038 <indexterm><primary><option>-pgmlo</option></primary></indexterm>
2039 <indexterm><primary><option>-pgmlc</option></primary></indexterm>
2040 <indexterm><primary><option>-pgma</option></primary></indexterm>
2041 <indexterm><primary><option>-pgml</option></primary></indexterm>
2042 <indexterm><primary><option>-pgmdll</option></primary></indexterm>
2043 <indexterm><primary><option>-pgmF</option></primary></indexterm>
2044
2045 </sect2>
2046
2047 <sect2>
2048 <title>Forcing options to particular phases</title>
2049
2050 <para><xref linkend="forcing-options-through"/></para>
2051
2052 <informaltable>
2053 <tgroup cols="4" align="left" colsep="1" rowsep="1">
2054 <thead>
2055 <row>
2056 <entry>Flag</entry>
2057 <entry>Description</entry>
2058 <entry>Static/Dynamic</entry>
2059 <entry>Reverse</entry>
2060 </row>
2061 </thead>
2062 <tbody>
2063 <row>
2064 <entry><option>-optL</option> <replaceable>option</replaceable></entry>
2065 <entry>pass <replaceable>option</replaceable> to the literate pre-processor</entry>
2066 <entry>dynamic</entry>
2067 <entry>-</entry>
2068 </row>
2069 <row>
2070 <entry><option>-optP</option> <replaceable>option</replaceable></entry>
2071 <entry>pass <replaceable>option</replaceable> to cpp (with
2072 <option>-cpp</option> only)</entry>
2073 <entry>dynamic</entry>
2074 <entry>-</entry>
2075 </row>
2076 <row>
2077 <entry><option>-optF</option> <replaceable>option</replaceable></entry>
2078 <entry>pass <replaceable>option</replaceable> to the
2079 custom pre-processor</entry>
2080 <entry>dynamic</entry>
2081 <entry>-</entry>
2082 </row>
2083 <row>
2084 <entry><option>-optc</option> <replaceable>option</replaceable></entry>
2085 <entry>pass <replaceable>option</replaceable> to the C compiler</entry>
2086 <entry>dynamic</entry>
2087 <entry>-</entry>
2088 </row>
2089 <row>
2090 <entry><option>-optlo</option> <replaceable>option</replaceable></entry>
2091 <entry>pass <replaceable>option</replaceable> to the LLVM optimiser</entry>
2092 <entry>dynamic</entry>
2093 <entry>-</entry>
2094 </row>
2095 <row>
2096 <entry><option>-optlc</option> <replaceable>option</replaceable></entry>
2097 <entry>pass <replaceable>option</replaceable> to the LLVM compiler</entry>
2098 <entry>dynamic</entry>
2099 <entry>-</entry>
2100 </row>
2101 <row>
2102 <entry><option>-optm</option> <replaceable>option</replaceable></entry>
2103 <entry>pass <replaceable>option</replaceable> to the mangler</entry>
2104 <entry>dynamic</entry>
2105 <entry>-</entry>
2106 </row>
2107 <row>
2108 <entry><option>-opta</option> <replaceable>option</replaceable></entry>
2109 <entry>pass <replaceable>option</replaceable> to the assembler</entry>
2110 <entry>dynamic</entry>
2111 <entry>-</entry>
2112 </row>
2113 <row>
2114 <entry><option>-optl</option> <replaceable>option</replaceable></entry>
2115 <entry>pass <replaceable>option</replaceable> to the linker</entry>
2116 <entry>dynamic</entry>
2117 <entry>-</entry>
2118 </row>
2119 <row>
2120 <entry><option>-optdll</option> <replaceable>option</replaceable></entry>
2121 <entry>pass <replaceable>option</replaceable> to the DLL generator</entry>
2122 <entry>dynamic</entry>
2123 <entry>-</entry>
2124 </row>
2125 <row>
2126 <entry><option>-optwindres</option> <replaceable>option</replaceable></entry>
2127 <entry>pass <replaceable>option</replaceable> to <literal>windres</literal>.</entry>
2128 <entry>dynamic</entry>
2129 <entry>-</entry>
2130 </row>
2131 </tbody>
2132 </tgroup>
2133 </informaltable>
2134 </sect2>
2135
2136 <sect2>
2137 <title>Platform-specific options</title>
2138
2139 <para><xref linkend="options-platform"/></para>
2140
2141 <informaltable>
2142 <tgroup cols="4" align="left" colsep="1" rowsep="1">
2143 <thead>
2144 <row>
2145 <entry>Flag</entry>
2146 <entry>Description</entry>
2147 <entry>Static/Dynamic</entry>
2148 <entry>Reverse</entry>
2149 </row>
2150 </thead>
2151 <tbody>
2152 <row>
2153 <entry><option>-msse2</option></entry>
2154 <entry>(x86 only) Use SSE2 for floating point</entry>
2155 <entry>dynamic</entry>
2156 <entry>-</entry>
2157 </row>
2158 </tbody>
2159 <tbody>
2160 <row>
2161 <entry><option>-monly-[432]-regs</option></entry>
2162 <entry>(x86 only) give some registers back to the C compiler</entry>
2163 <entry>dynamic</entry>
2164 <entry>-</entry>
2165 </row>
2166 </tbody>
2167 </tgroup>
2168 </informaltable>
2169 </sect2>
2170
2171
2172 <sect2>
2173 <title>External core file options</title>
2174
2175 <para><xref linkend="ext-core"/></para>
2176
2177 <informaltable>
2178 <tgroup cols="4" align="left" colsep="1" rowsep="1">
2179 <thead>
2180 <row>
2181 <entry>Flag</entry>
2182 <entry>Description</entry>
2183 <entry>Static/Dynamic</entry>
2184 <entry>Reverse</entry>
2185 </row>
2186 </thead>
2187 <tbody>
2188 <row>
2189 <entry><option>-fext-core</option></entry>
2190 <entry>Generate <filename>.hcr</filename> external Core files</entry>
2191 <entry>dynamic</entry>
2192 <entry>-</entry>
2193 </row>
2194 </tbody>
2195 </tgroup>
2196 </informaltable>
2197 </sect2>
2198
2199
2200 <sect2>
2201 <title>Compiler debugging options</title>
2202
2203 <para><xref linkend="options-debugging"/></para>
2204
2205 <informaltable>
2206 <tgroup cols="4" align="left" colsep="1" rowsep="1">
2207 <thead>
2208 <row>
2209 <entry>Flag</entry>
2210 <entry>Description</entry>
2211 <entry>Static/Dynamic</entry>
2212 <entry>Reverse</entry>
2213 </row>
2214 </thead>
2215 <tbody>
2216 <row>
2217 <entry><option>-dcore-lint</option></entry>
2218 <entry>Turn on internal sanity checking</entry>
2219 <entry>dynamic</entry>
2220 <entry>-</entry>
2221 </row>
2222 <row>
2223 <entry><option>-ddump-asm</option></entry>
2224 <entry>Dump assembly</entry>
2225 <entry>dynamic</entry>
2226 <entry>-</entry>
2227 </row>
2228 <row>
2229 <entry><option>-ddump-bcos</option></entry>
2230 <entry>Dump interpreter byte code</entry>
2231 <entry>dynamic</entry>
2232 <entry>-</entry>
2233 </row>
2234 <row>
2235 <entry><option>-ddump-cmm</option></entry>
2236 <entry>Dump C-- output</entry>
2237 <entry>dynamic</entry>
2238 <entry>-</entry>
2239 </row>
2240 <row>
2241 <entry><option>-ddump-core-stats</option></entry>
2242 <entry>Print a one-line summary of the size of the Core program
2243 at the end of the optimisation pipeline </entry>
2244 <entry>dynamic</entry>
2245 <entry>-</entry>
2246 </row>
2247 <row>
2248 <entry><option>-ddump-cpranal</option></entry>
2249 <entry>Dump output from CPR analysis</entry>
2250 <entry>dynamic</entry>
2251 <entry>-</entry>
2252 </row>
2253 <row>
2254 <entry><option>-ddump-cse</option></entry>
2255 <entry>Dump CSE output</entry>
2256 <entry>dynamic</entry>
2257 <entry>-</entry>
2258 </row>
2259 <row>
2260 <entry><option>-ddump-deriv</option></entry>
2261 <entry>Dump deriving output</entry>
2262 <entry>dynamic</entry>
2263 <entry>-</entry>
2264 </row>
2265 <row>
2266 <entry><option>-ddump-ds</option></entry>
2267 <entry>Dump desugarer output</entry>
2268 <entry>dynamic</entry>
2269 <entry>-</entry>
2270 </row>
2271 <row>
2272 <entry><option>-ddump-flatC</option></entry>
2273 <entry>Dump &ldquo;flat&rdquo; C</entry>
2274 <entry>dynamic</entry>
2275 <entry>-</entry>
2276 </row>
2277 <row>
2278 <entry><option>-ddump-foreign</option></entry>
2279 <entry>Dump <literal>foreign export</literal> stubs</entry>
2280 <entry>dynamic</entry>
2281 <entry>-</entry>
2282 </row>
2283 <row>
2284 <entry><option>-ddump-hpc</option></entry>
2285 <entry>Dump after instrumentation for program coverage</entry>
2286 <entry>dynamic</entry>
2287 <entry>-</entry>
2288 </row>
2289 <row>
2290 <entry><option>-ddump-inlinings</option></entry>
2291 <entry>Dump inlining info</entry>
2292 <entry>dynamic</entry>
2293 <entry>-</entry>
2294 </row>
2295 <row>
2296 <entry><option>-ddump-llvm</option></entry>
2297 <entry>Dump LLVM intermediate code</entry>
2298 <entry>dynamic</entry>
2299 <entry>-</entry>
2300 </row>
2301 <row>
2302 <entry><option>-ddump-occur-anal</option></entry>
2303 <entry>Dump occurrence analysis output</entry>
2304 <entry>dynamic</entry>
2305 <entry>-</entry>
2306 </row>
2307 <row>
2308 <entry><option>-ddump-opt-cmm</option></entry>
2309 <entry>Dump the results of C-- to C-- optimising passes</entry>
2310 <entry>dynamic</entry>
2311 <entry>-</entry>
2312 </row>
2313 <row>
2314 <entry><option>-ddump-parsed</option></entry>
2315 <entry>Dump parse tree</entry>
2316 <entry>dynamic</entry>
2317 <entry>-</entry>
2318 </row>
2319 <row>
2320 <entry><option>-ddump-prep</option></entry>
2321 <entry>Dump prepared core</entry>
2322 <entry>dynamic</entry>
2323 <entry>-</entry>
2324 </row>
2325 <row>
2326 <entry><option>-ddump-rn</option></entry>
2327 <entry>Dump renamer output</entry>
2328 <entry>dynamic</entry>
2329 <entry>-</entry>
2330 </row>
2331 <row>
2332 <entry><option>-ddump-rule-firings</option></entry>
2333 <entry>Dump rule firing info</entry>
2334 <entry>dynamic</entry>
2335 <entry>-</entry>
2336 </row>
2337 <row>
2338 <entry><option>-ddump-rule-rewrites</option></entry>
2339 <entry>Dump detailed rule firing info</entry>
2340 <entry>dynamic</entry>
2341 <entry>-</entry>
2342 </row>
2343 <row>
2344 <entry><option>-ddump-rules</option></entry>
2345 <entry>Dump rules</entry>
2346 <entry>dynamic</entry>
2347 <entry>-</entry>
2348 </row>
2349 <row>
2350 <entry><option>-ddump-vect</option></entry>
2351 <entry>Dump vectoriser input and output</entry>
2352 <entry>dynamic</entry>
2353 <entry>-</entry>
2354 </row>
2355 <row>
2356 <entry><option>-ddump-simpl</option></entry>
2357 <entry>Dump final simplifier output</entry>
2358 <entry>dynamic</entry>
2359 <entry>-</entry>
2360 </row>
2361 <row>
2362 <entry><option>-ddump-simpl-phases</option></entry>
2363 <entry>Dump output from each simplifier phase</entry>
2364 <entry>dynamic</entry>
2365 <entry>-</entry>
2366 </row>
2367 <row>
2368 <entry><option>-ddump-simpl-iterations</option></entry>
2369 <entry>Dump output from each simplifier iteration</entry>
2370 <entry>dynamic</entry>
2371 <entry>-</entry>
2372 </row>
2373 <row>
2374 <entry><option>-ddump-spec</option></entry>
2375 <entry>Dump specialiser output</entry>
2376 <entry>dynamic</entry>
2377 <entry>-</entry>
2378 </row>
2379 <row>
2380 <entry><option>-ddump-splices</option></entry>
2381 <entry>Dump TH spliced expressions, and what they evaluate to</entry>
2382 <entry>dynamic</entry>
2383 <entry>-</entry>
2384 </row>
2385 <row>
2386 <entry><option>-ddump-stg</option></entry>
2387 <entry>Dump final STG</entry>
2388 <entry>dynamic</entry>
2389 <entry>-</entry>
2390 </row>
2391 <row>
2392 <entry><option>-ddump-stranal</option></entry>
2393 <entry>Dump strictness analyser output</entry>
2394 <entry>dynamic</entry>
2395 <entry>-</entry>
2396 </row>
2397 <row>
2398 <entry><option>-ddump-tc</option></entry>
2399 <entry>Dump typechecker output</entry>
2400 <entry>dynamic</entry>
2401 <entry>-</entry>
2402 </row>
2403 <row>
2404 <entry><option>-ddump-types</option></entry>
2405 <entry>Dump type signatures</entry>
2406 <entry>dynamic</entry>
2407 <entry>-</entry>
2408 </row>
2409 <row>
2410 <entry><option>-ddump-worker-wrapper</option></entry>
2411 <entry>Dump worker-wrapper output</entry>
2412 <entry>dynamic</entry>
2413 <entry>-</entry>
2414 </row>
2415 <row>
2416 <entry><option>-ddump-if-trace</option></entry>
2417 <entry>Trace interface files</entry>
2418 <entry>dynamic</entry>
2419 <entry>-</entry>
2420 </row>
2421 <row>
2422 <entry><option>-ddump-tc-trace</option></entry>
2423 <entry>Trace typechecker</entry>
2424 <entry>dynamic</entry>
2425 <entry>-</entry>
2426 </row>
2427 <row>
2428 <entry><option>-ddump-vt-trace</option></entry>
2429 <entry>Trace vectoriser</entry>
2430 <entry>dynamic</entry>
2431 <entry>-</entry>
2432 </row>
2433 <row>
2434 <entry><option>-ddump-rn-trace</option></entry>
2435 <entry>Trace renamer</entry>
2436 <entry>dynamic</entry>
2437 <entry>-</entry>
2438 </row>
2439 <row>
2440 <entry><option>-ddump-rn-stats</option></entry>
2441 <entry>Renamer stats</entry>
2442 <entry>dynamic</entry>
2443 <entry>-</entry>
2444 </row>
2445 <row>
2446 <entry><option>-ddump-simpl-stats</option></entry>
2447 <entry>Dump simplifier stats</entry>
2448 <entry>dynamic</entry>
2449 <entry>-</entry>
2450 </row>
2451 <row>
2452 <entry><option>-dno-debug-output</option></entry>
2453 <entry>Suppress unsolicited debugging output</entry>
2454 <entry>static</entry>
2455 <entry>-</entry>
2456 </row>
2457 <row>
2458 <entry><option>-dppr-debug</option></entry>
2459 <entry>Turn on debug printing (more verbose)</entry>
2460 <entry>static</entry>
2461 <entry>-</entry>
2462 </row>
2463 <row>
2464 <entry><option>-dsuppress-uniques</option></entry>
2465 <entry>Suppress the printing of uniques in debug output (easier to use <command>diff</command>.</entry>
2466 <entry>static</entry>
2467 <entry>-</entry>
2468 </row>
2469 <row>
2470 <entry><option>-dsuppress-coercions</option></entry>
2471 <entry>Suppress the printing of coercions in Core dumps to make them shorter.</entry>
2472 <entry>static</entry>
2473 <entry>-</entry>
2474 </row>
2475 <row>
2476 <entry><option>-dsuppress-module-prefixes</option></entry>
2477 <entry>Suppress the printing of module qualification prefixes in Core dumps to make them easier to read.</entry>
2478 <entry>static</entry>
2479 <entry>-</entry>
2480 </row>
2481 <row>
2482 <entry><option>-dppr-noprags</option></entry>
2483 <entry>Don't output pragma info in dumps</entry>
2484 <entry>static</entry>
2485 <entry>-</entry>
2486 </row>
2487 <row>
2488 <entry><option>-dppr-user-length</option></entry>
2489 <entry>Set the depth for printing expressions in error msgs</entry>
2490 <entry>static</entry>
2491 <entry>-</entry>
2492 </row>
2493 <row>
2494 <entry><option>-dsource-stats</option></entry>
2495 <entry>Dump haskell source stats</entry>
2496 <entry>dynamic</entry>
2497 <entry>-</entry>
2498 </row>
2499 <row>
2500 <entry><option>-dcmm-lint</option></entry>
2501 <entry>C-- pass sanity checking</entry>
2502 <entry>dynamic</entry>
2503 <entry>-</entry>
2504 </row>
2505 <row>
2506 <entry><option>-dstg-lint</option></entry>
2507 <entry>STG pass sanity checking</entry>
2508 <entry>dynamic</entry>
2509 <entry>-</entry>
2510 </row>
2511 <row>
2512 <entry><option>-dstg-stats</option></entry>
2513 <entry>Dump STG stats</entry>
2514 <entry>dynamic</entry>
2515 <entry>-</entry>
2516 </row>
2517 <row>
2518 <entry><option>-dverbose-core2core</option></entry>
2519 <entry>Show output from each core-to-core pass</entry>
2520 <entry>dynamic</entry>
2521 <entry>-</entry>
2522 </row>
2523 <row>
2524 <entry><option>-dverbose-stg2stg</option></entry>
2525 <entry>Show output from each STG-to-STG pass</entry>
2526 <entry>dynamic</entry>
2527 <entry>-</entry>
2528 </row>
2529 <row>
2530 <entry><option>-dshow-passes</option></entry>
2531 <entry>Print out each pass name as it happens</entry>
2532 <entry>dynamic</entry>
2533 <entry>-</entry>
2534 </row>
2535 <row>
2536 <entry><option>-dfaststring-stats</option></entry>
2537 <entry>Show statistics for fast string usage when finished</entry>
2538 <entry>dynamic</entry>
2539 <entry>-</entry>
2540 </row>
2541 </tbody>
2542 </tgroup>
2543 </informaltable>
2544 </sect2>
2545
2546 <sect2>
2547 <title>Misc compiler options</title>
2548
2549 <informaltable>
2550 <tgroup cols="4" align="left" colsep="1" rowsep="1">
2551 <thead>
2552 <row>
2553 <entry>Flag</entry>
2554 <entry>Description</entry>
2555 <entry>Static/Dynamic</entry>
2556 <entry>Reverse</entry>
2557 </row>
2558 </thead>
2559 <tbody>
2560 <row>
2561 <entry><option>-fno-hi-version-check</option></entry>
2562 <entry>Don't complain about <literal>.hi</literal> file mismatches</entry>
2563 <entry>static</entry>
2564 <entry>-</entry>
2565 </row>
2566 <row>
2567 <entry><option>-dno-black-holing</option></entry>
2568 <entry>Turn off black holing (probably doesn't work)</entry>
2569 <entry>static</entry>
2570 <entry>-</entry>
2571 </row>
2572 <row>
2573 <entry><option>-fhistory-size</option></entry>
2574 <entry>Set simplification history size</entry>
2575 <entry>static</entry>
2576 <entry>-</entry>
2577 </row>
2578 <row>
2579 <entry><option>-funregisterised</option></entry>
2580 <entry>Unregisterised compilation (use <option>-unreg</option> instead)</entry>
2581 <entry>static</entry>
2582 <entry>-</entry>
2583 </row>
2584 <row>
2585 <entry><option>-fno-ghci-sandbox</option></entry>
2586 <entry>Turn off the GHCi sandbox. Means computations are run in teh main thread, rather than a forked thread.</entry>
2587 <entry>dynamic</entry>
2588 <entry>-</entry>
2589 </row>
2590 </tbody>
2591 </tgroup>
2592 </informaltable>
2593 </sect2>
2594 </sect1>
2595
2596
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