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[official-gcc.git] / gcc / ada / usage.adb
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1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- U S A G E --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2017, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
20 -- --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
23 -- --
24 ------------------------------------------------------------------------------
25
26 -- Warning: the output of this usage for warnings is duplicated in the GNAT
27 -- reference manual. Be sure to update that if you change the warning list.
28
29 with Namet; use Namet;
30 with Opt; use Opt;
31 with Osint; use Osint;
32 with Output; use Output;
33
34 with System.WCh_Con; use System.WCh_Con;
35
36 procedure Usage is
37
38 procedure Write_Switch_Char (Sw : String; Prefix : String := "gnat");
39 -- Output two spaces followed by the switch character minus followed
40 -- Prefix, followed by the string given as the argument, and then enough
41 -- blanks to tab to column 13, i.e. assuming Sw is not longer than 5
42 -- characters, the maximum allowed, Write_Switch_Char will always output
43 -- exactly 12 characters.
44
45 -----------------------
46 -- Write_Switch_Char --
47 -----------------------
48
49 procedure Write_Switch_Char (Sw : String; Prefix : String := "gnat") is
50 begin
51 Write_Str (" -");
52 Write_Str (Prefix);
53 Write_Str (Sw);
54
55 for J in 1 .. 12 - 3 - Prefix'Length - Sw'Length loop
56 Write_Char (' ');
57 end loop;
58 end Write_Switch_Char;
59
60 -- Start of processing for Usage
61
62 begin
63 Find_Program_Name;
64
65 -- For gnatmake, we are appending this information to the end of
66 -- the normal gnatmake output, so generate appropriate header
67
68 if Name_Len >= 8
69 and then (Name_Buffer (Name_Len - 7 .. Name_Len) = "gnatmake"
70 or else
71 Name_Buffer (Name_Len - 7 .. Name_Len) = "GNATMAKE")
72 then
73 Write_Eol;
74 Write_Line ("Compiler switches (passed to the compiler by gnatmake):");
75
76 else
77 -- Usage line
78
79 Write_Str ("Usage: ");
80 Write_Program_Name;
81 Write_Char (' ');
82 Write_Str ("switches sfile");
83 Write_Eol;
84 Write_Eol;
85
86 -- Line for sfile
87
88 Write_Line (" sfile Source file name");
89 end if;
90
91 Write_Eol;
92
93 -- Common switches available everywhere
94
95 Write_Switch_Char ("g ", "");
96 Write_Line ("Generate debugging information");
97
98 Write_Switch_Char ("Idir ", "");
99 Write_Line ("Specify source files search path");
100
101 Write_Switch_Char ("I- ", "");
102 Write_Line ("Do not look for sources in current directory");
103
104 Write_Switch_Char ("O[0123] ", "");
105 Write_Line ("Control the optimization level");
106
107 Write_Eol;
108
109 -- Individual lines for switches. Write_Switch_Char outputs fourteen
110 -- characters, so the remaining message is allowed to be a maximum of
111 -- 65 characters to be comfortable in an 80 character window.
112
113 -- Line for -gnata switch
114
115 Write_Switch_Char ("a");
116 Write_Line ("Assertions enabled. Pragma Assert/Debug to be activated");
117
118 -- Line for -gnatA switch
119
120 Write_Switch_Char ("A");
121 Write_Line ("Avoid processing gnat.adc, if present file will be ignored");
122
123 -- Line for -gnatb switch
124
125 Write_Switch_Char ("b");
126 Write_Line ("Generate brief messages to stderr even if verbose mode set");
127
128 -- Line for -gnatB switch
129
130 Write_Switch_Char ("B");
131 Write_Line ("Assume no bad (invalid) values except in 'Valid attribute");
132
133 -- Line for -gnatc switch
134
135 Write_Switch_Char ("c");
136 Write_Line ("Check syntax and semantics only (no code generation)");
137
138 -- Line for -gnatC switch
139
140 Write_Switch_Char ("C");
141 Write_Line ("Generate CodePeer intermediate format (no code generation)");
142
143 -- Line for -gnatd switch
144
145 Write_Switch_Char ("d?");
146 Write_Line ("Compiler debug option ? ([.]a-z,A-Z,0-9), see debug.adb");
147
148 -- Line for -gnatD switch
149
150 Write_Switch_Char ("D");
151 Write_Line ("Debug expanded generated code (max line length = 72)");
152 Write_Switch_Char ("Dnn");
153 Write_Line ("Debug expanded generated code (max line length = nn)");
154
155 -- No line for -gnatea : internal switch
156
157 -- Line for -gnateA switch
158
159 Write_Switch_Char ("eA");
160 Write_Line ("Aliasing checks on subprogram parameters");
161
162 -- Line for -gnatec switch
163
164 Write_Switch_Char ("ec=?");
165 Write_Line ("Specify configuration pragmas file, e.g. -gnatec=/x/f.adc");
166
167 -- Line for -gnateC switch
168
169 Write_Switch_Char ("eC");
170 Write_Line ("Generate CodePeer messages (ignored without -gnatcC)");
171
172 -- Line for -gnated switch
173
174 Write_Switch_Char ("ed");
175 Write_Line ("Disable synchronization of atomic variables");
176
177 -- Line for -gnateD switch
178
179 Write_Switch_Char ("eD?");
180 Write_Line ("Define or redefine preprocessing symbol, e.g. -gnateDsym=val");
181
182 -- Line for -gnateE switch
183
184 Write_Switch_Char ("eE");
185 Write_Line ("Generate extra information in exception messages");
186
187 -- Line for -gnatef switch
188
189 Write_Switch_Char ("ef");
190 Write_Line ("Full source path in brief error messages");
191
192 -- Line for -gnateF switch
193
194 Write_Switch_Char ("eF");
195 Write_Line ("Check overflow on predefined Float types");
196
197 -- Line for -gnateG switch
198
199 Write_Switch_Char ("eG");
200 Write_Line ("Generate preprocessed source");
201
202 -- Line for -gnatei switch
203
204 Write_Switch_Char ("einn");
205 Write_Line ("Set maximum number of instantiations to nn");
206
207 -- Line for -gnateI switch
208
209 Write_Switch_Char ("eInn");
210 Write_Line ("Index in multi-unit source, e.g. -gnateI2");
211
212 -- Line for -gnatel switch
213
214 Write_Switch_Char ("el");
215 Write_Line ("Turn on info messages on generated Elaborate[_All] pragmas");
216
217 -- Line for -gnateL switch
218
219 Write_Switch_Char ("eL");
220 Write_Line ("Turn off info messages on generated Elaborate[_All] pragmas");
221
222 -- Line for -gnatem switch
223
224 Write_Switch_Char ("em=?");
225 Write_Line ("Specify mapping file, e.g. -gnatem=mapping");
226
227 -- No line for -gnateO=? : internal switch
228
229 -- Line for -gnatep switch
230
231 Write_Switch_Char ("ep=?");
232 Write_Line ("Specify preprocessing data file, e.g. -gnatep=prep.data");
233
234 -- Line for -gnateP switch
235
236 Write_Switch_Char ("eP");
237 Write_Line ("Pure/Prelaborate errors generate warnings rather than errors");
238
239 -- No line for -gnates=? : internal switch
240
241 -- Line for -gnateS switch
242
243 Write_Switch_Char ("eS");
244 Write_Line ("Generate SCO (Source Coverage Obligation) information");
245
246 -- Line for -gnatet switch
247
248 Write_Switch_Char ("et=?");
249 Write_Line ("Write target dependent information file ?, e.g. gnatet=tdf");
250
251 -- Line for -gnateT switch
252
253 Write_Switch_Char ("eT=?");
254 Write_Line ("Read target dependent information file ?, e.g. gnateT=tdf");
255
256 -- Line for -gnateu switch
257
258 Write_Switch_Char ("eu");
259 Write_Line ("Ignore unrecognized style/validity/warning switches");
260
261 -- Line for -gnateV switch
262
263 Write_Switch_Char ("eV");
264 Write_Line ("Validity checks on subprogram parameters");
265
266 -- Line for -gnateY switch
267
268 Write_Switch_Char ("eY");
269 Write_Line ("Ignore all Style_Checks pragmas in source");
270
271 -- No line for -gnatez : internal switch
272
273 -- Line for -gnatE switch
274
275 Write_Switch_Char ("E");
276 Write_Line ("Dynamic elaboration checking mode enabled");
277
278 -- Line for -gnatf switch
279
280 Write_Switch_Char ("f");
281 Write_Line ("Full errors. Verbose details, all undefined references");
282
283 -- Line for -gnatF switch
284
285 Write_Switch_Char ("F");
286 Write_Line ("Force all import/export external names to all uppercase");
287
288 -- Line for -gnatg switch
289
290 Write_Switch_Char ("g");
291 Write_Line ("GNAT implementation mode (used for compiling GNAT units)");
292
293 -- Lines for -gnatG switch
294
295 Write_Switch_Char ("G");
296 Write_Line ("Output generated expanded code (max line length = 72)");
297 Write_Switch_Char ("Gnn");
298 Write_Line ("Output generated expanded code (max line length = nn)");
299
300 -- Line for -gnath switch
301
302 Write_Switch_Char ("h");
303 Write_Line ("Output this usage (help) information");
304
305 -- Line for -gnati switch
306
307 Write_Switch_Char ("i?");
308 Write_Line ("Identifier char set (?=1/2/3/4/5/8/9/p/f/n/w)");
309
310 -- Line for -gnatI switch
311
312 Write_Switch_Char ("I");
313 Write_Line ("Ignore all representation clauses");
314
315 -- Line for -gnatj switch
316
317 Write_Switch_Char ("jnn");
318 Write_Line ("Format error and warning messages to fit nn character lines");
319
320 -- Line for -gnatk switch
321
322 Write_Switch_Char ("k");
323 Write_Line ("Limit file names to nn characters (k = krunch)");
324
325 -- Lines for -gnatl switch
326
327 Write_Switch_Char ("l");
328 Write_Line ("Output full source listing with embedded error messages");
329 Write_Switch_Char ("l=f");
330 Write_Line ("Output full source listing to specified file");
331
332 -- Line for -gnatL switch
333
334 Write_Switch_Char ("L");
335 Write_Line ("List corresponding source text in -gnatG or -gnatD output");
336
337 -- Line for -gnatm switch
338
339 Write_Switch_Char ("mnn");
340 Write_Line ("Limit number of detected errors/warnings to nn (1-999999)");
341
342 -- Line for -gnatn switch
343
344 Write_Switch_Char ("n[?]");
345 Write_Line ("Enable pragma Inline (both within and across units, ?=1/2)");
346
347 -- Line for -gnato switch
348
349 Write_Switch_Char ("o0");
350 Write_Line ("Disable overflow checking");
351
352 Write_Switch_Char ("o");
353 Write_Line ("Enable overflow checking in STRICT (-gnato1) mode (default)");
354
355 -- Lines for -gnato? switches
356
357 Write_Switch_Char ("o?");
358 Write_Line
359 ("Enable overflow checks in STRICT/MINIMIZED/ELIMINATED (1/2/3) mode ");
360 Write_Switch_Char ("o??");
361 Write_Line
362 ("Set mode for general/assertion expressions separately");
363
364 -- No line for -gnatO : internal switch
365
366 -- Line for -gnatp switch
367
368 Write_Switch_Char ("p");
369 Write_Line ("Suppress all checks");
370
371 -- Line for -gnatP switch
372
373 Write_Switch_Char ("P");
374 Write_Line ("Generate periodic calls to System.Polling.Poll");
375
376 -- Line for -gnatq switch
377
378 Write_Switch_Char ("q");
379 Write_Line ("Don't quit, try semantics, even if parse errors");
380
381 -- Line for -gnatQ switch
382
383 Write_Switch_Char ("Q");
384 Write_Line ("Don't quit, write ali/tree file even if compile errors");
385
386 -- Line for -gnatr switch
387
388 Write_Switch_Char ("r");
389 Write_Line ("Treat pragma Restrictions as Restriction_Warnings");
390
391 -- Lines for -gnatR switch
392
393 Write_Switch_Char ("R?");
394 Write_Line
395 ("List rep info (?=0/1/2/3/e/m for none/types/all/symbolic/ext/mech)");
396 Write_Switch_Char ("R?s");
397 Write_Line ("List rep info to file.rep instead of standard output");
398
399 -- Line for -gnats switch
400
401 Write_Switch_Char ("s");
402 Write_Line ("Syntax check only");
403
404 -- Line for -gnatS switch
405
406 Write_Switch_Char ("S");
407 Write_Line ("Print listing of package Standard");
408
409 -- Line for -gnatt switch
410
411 Write_Switch_Char ("t");
412 Write_Line ("Tree output file to be generated");
413
414 -- Line for -gnatTnn switch
415
416 Write_Switch_Char ("Tnn");
417 Write_Line ("All compiler tables start at nn times usual starting size");
418
419 -- Line for -gnatu switch
420
421 Write_Switch_Char ("u");
422 Write_Line ("List units for this compilation");
423
424 -- Line for -gnatU switch
425
426 Write_Switch_Char ("U");
427 Write_Line ("Enable unique tag for error messages");
428
429 -- Line for -gnatv switch
430
431 Write_Switch_Char ("v");
432 Write_Line ("Verbose mode. Full error output with source lines to stdout");
433
434 -- Lines for -gnatV switch
435
436 Write_Switch_Char ("Vxx");
437 Write_Line
438 ("Enable selected validity checking mode, xx = list of parameters:");
439 Write_Line (" a turn on all validity checking options");
440 Write_Line (" c turn on checking for copies");
441 Write_Line (" C turn off checking for copies");
442 Write_Line (" d turn on default (RM) checking");
443 Write_Line (" D turn off default (RM) checking");
444 Write_Line (" e turn on checking for elementary components");
445 Write_Line (" E turn off checking for elementary components");
446 Write_Line (" f turn on checking for floating-point");
447 Write_Line (" F turn off checking for floating-point");
448 Write_Line (" i turn on checking for in params");
449 Write_Line (" I turn off checking for in params");
450 Write_Line (" m turn on checking for in out params");
451 Write_Line (" M turn off checking for in out params");
452 Write_Line (" o turn on checking for operators/attributes");
453 Write_Line (" O turn off checking for operators/attributes");
454 Write_Line (" p turn on checking for parameters");
455 Write_Line (" P turn off checking for parameters");
456 Write_Line (" r turn on checking for returns");
457 Write_Line (" R turn off checking for returns");
458 Write_Line (" s turn on checking for subscripts");
459 Write_Line (" S turn off checking for subscripts");
460 Write_Line (" t turn on checking for tests");
461 Write_Line (" T turn off checking for tests");
462 Write_Line (" n turn off all validity checks (including RM)");
463
464 -- Lines for -gnatw switch
465
466 Write_Switch_Char ("wxx");
467 Write_Line ("Enable selected warning modes, xx = list of parameters:");
468 Write_Line (" * indicates default setting");
469 Write_Line (" + indicates warning flag included in -gnatwa");
470 Write_Line (" a turn on all info/warnings marked below with +");
471 Write_Line (" A turn off all optional info/warnings");
472 Write_Line (" .a*+ turn on warnings for failing assertion");
473 Write_Line (" .A turn off warnings for failing assertion");
474 Write_Line (" b+ turn on warnings for bad fixed value " &
475 "(not multiple of small)");
476 Write_Line (" B* turn off warnings for bad fixed value " &
477 "(not multiple of small)");
478 Write_Line (" .b*+ turn on warnings for biased representation");
479 Write_Line (" .B turn off warnings for biased representation");
480 Write_Line (" c+ turn on warnings for constant conditional");
481 Write_Line (" C* turn off warnings for constant conditional");
482 Write_Line (" .c+ turn on warnings for unrepped components");
483 Write_Line (" .C* turn off warnings for unrepped components");
484 Write_Line (" d turn on warnings for implicit dereference");
485 Write_Line (" D* turn off warnings for implicit dereference");
486 Write_Line (" .d turn on tagging of warnings with -gnatw switch");
487 Write_Line (" .D* turn off tagging of warnings with -gnatw switch");
488 Write_Line (" e treat all warnings (but not info) as errors");
489 Write_Line (" .e turn on every optional info/warning " &
490 "(no exceptions)");
491 Write_Line (" E treat all run-time warnings as errors");
492 Write_Line (" f+ turn on warnings for unreferenced formal");
493 Write_Line (" F* turn off warnings for unreferenced formal");
494 Write_Line (" .f turn on warnings for suspicious Subp'Access");
495 Write_Line (" .F* turn off warnings for suspicious Subp'Access");
496 Write_Line (" g*+ turn on warnings for unrecognized pragma");
497 Write_Line (" G turn off warnings for unrecognized pragma");
498 Write_Line (" .g turn on GNAT warnings");
499 Write_Line (" h turn on warnings for hiding declarations");
500 Write_Line (" H* turn off warnings for hiding declarations");
501 Write_Line (" .h turn on warnings for holes in records");
502 Write_Line (" .H* turn off warnings for holes in records");
503 Write_Line (" i*+ turn on warnings for implementation unit");
504 Write_Line (" I turn off warnings for implementation unit");
505 Write_Line (" .i*+ turn on warnings for overlapping actuals");
506 Write_Line (" .I turn off warnings for overlapping actuals");
507 Write_Line (" j+ turn on warnings for obsolescent " &
508 "(annex J) feature");
509 Write_Line (" J* turn off warnings for obsolescent " &
510 "(annex J) feature");
511 Write_Line (" .j+ turn on warnings for late dispatching " &
512 "primitives");
513 Write_Line (" .J* turn off warnings for late dispatching " &
514 "primitives");
515 Write_Line (" k+ turn on warnings on constant variable");
516 Write_Line (" K* turn off warnings on constant variable");
517 Write_Line (" .k turn on warnings for standard redefinition");
518 Write_Line (" .K* turn off warnings for standard redefinition");
519 Write_Line (" l turn on warnings for elaboration problems");
520 Write_Line (" L* turn off warnings for elaboration problems");
521 Write_Line (" .l turn on info messages for inherited aspects");
522 Write_Line (" .L* turn off info messages for inherited aspects");
523 Write_Line (" m+ turn on warnings for variable assigned " &
524 "but not read");
525 Write_Line (" M* turn off warnings for variable assigned " &
526 "but not read");
527 Write_Line (" .m*+ turn on warnings for suspicious modulus value");
528 Write_Line (" .M turn off warnings for suspicious modulus value");
529 Write_Line (" n* normal warning mode (cancels -gnatws/-gnatwe)");
530 Write_Line (" .n turn on info messages for atomic " &
531 "synchronization");
532 Write_Line (" .N* turn off info messages for atomic " &
533 "synchronization");
534 Write_Line (" o* turn on warnings for address clause overlay");
535 Write_Line (" O turn off warnings for address clause overlay");
536 Write_Line (" .o turn on warnings for out parameters assigned " &
537 "but not read");
538 Write_Line (" .O* turn off warnings for out parameters assigned " &
539 "but not read");
540 Write_Line (" p+ turn on warnings for ineffective pragma " &
541 "Inline in frontend");
542 Write_Line (" P* turn off warnings for ineffective pragma " &
543 "Inline in frontend");
544 Write_Line (" .p+ turn on warnings for suspicious parameter " &
545 "order");
546 Write_Line (" .P* turn off warnings for suspicious parameter " &
547 "order");
548 Write_Line (" q*+ turn on warnings for questionable " &
549 "missing parenthesis");
550 Write_Line (" Q turn off warnings for questionable " &
551 "missing parenthesis");
552 Write_Line (" .q+ turn on warnings for questionable layout of " &
553 "record types");
554 Write_Line (" .Q* turn off warnings for questionable layout of " &
555 "record types");
556 Write_Line (" r+ turn on warnings for redundant construct");
557 Write_Line (" R* turn off warnings for redundant construct");
558 Write_Line (" .r+ turn on warnings for object renaming function");
559 Write_Line (" .R* turn off warnings for object renaming function");
560 Write_Line (" s suppress all info/warnings");
561 Write_Line (" .s turn on warnings for overridden size clause");
562 Write_Line (" .S* turn off warnings for overridden size clause");
563 Write_Line (" t turn on warnings for tracking deleted code");
564 Write_Line (" T* turn off warnings for tracking deleted code");
565 Write_Line (" .t*+ turn on warnings for suspicious contract");
566 Write_Line (" .T turn off warnings for suspicious contract");
567 Write_Line (" u+ turn on warnings for unused entity");
568 Write_Line (" U* turn off warnings for unused entity");
569 Write_Line (" .u turn on warnings for unordered enumeration");
570 Write_Line (" .U* turn off warnings for unordered enumeration");
571 Write_Line (" v*+ turn on warnings for unassigned variable");
572 Write_Line (" V turn off warnings for unassigned variable");
573 Write_Line (" .v*+ turn on info messages for reverse bit order");
574 Write_Line (" .V turn off info messages for reverse bit order");
575 Write_Line (" w*+ turn on warnings for wrong low bound assumption");
576 Write_Line (" W turn off warnings for wrong low bound " &
577 "assumption");
578 Write_Line (" .w turn on warnings on pragma Warnings Off");
579 Write_Line (" .W* turn off warnings on pragma Warnings Off");
580 Write_Line (" x*+ turn on warnings for export/import");
581 Write_Line (" X turn off warnings for export/import");
582 Write_Line (" .x+ turn on warnings for non-local exception");
583 Write_Line (" .X* turn off warnings for non-local exception");
584 Write_Line (" y*+ turn on warnings for Ada compatibility issues");
585 Write_Line (" Y turn off warnings for Ada compatibility issues");
586 Write_Line (" .y turn on info messages for why pkg body needed");
587 Write_Line (" .Y* turn off info messages for why pkg body needed");
588 Write_Line (" z*+ turn on warnings for suspicious " &
589 "unchecked conversion");
590 Write_Line (" Z turn off warnings for suspicious " &
591 "unchecked conversion");
592 Write_Line (" .z*+ turn on warnings for record size not a " &
593 "multiple of alignment");
594 Write_Line (" .Z turn off warnings for record size not a " &
595 "multiple of alignment");
596
597 -- Line for -gnatW switch
598
599 Write_Switch_Char ("W?");
600 Write_Str ("Wide character encoding method (?=");
601
602 for J in WC_Encoding_Method loop
603 Write_Char (WC_Encoding_Letters (J));
604
605 if J = WC_Encoding_Method'Last then
606 Write_Char (')');
607 else
608 Write_Char ('/');
609 end if;
610 end loop;
611
612 Write_Eol;
613
614 -- Line for -gnatx switch
615
616 Write_Switch_Char ("x");
617 Write_Line ("Suppress output of cross-reference information");
618
619 -- Line for -gnatX switch
620
621 Write_Switch_Char ("X");
622 Write_Line ("Language extensions permitted");
623
624 -- Lines for -gnaty switch
625
626 Write_Switch_Char ("y");
627 Write_Line ("Enable default style checks (same as -gnaty3abcefhiklmnprst)");
628 Write_Switch_Char ("yxx");
629 Write_Line ("Enable selected style checks xx = list of parameters:");
630 Write_Line (" 1-9 check indentation");
631 Write_Line (" a check attribute casing");
632 Write_Line (" A check array attribute indexes");
633 Write_Line (" b check no blanks at end of lines");
634 Write_Line (" B check no use of AND/OR for boolean expressions");
635 Write_Line (" c check comment format (two spaces)");
636 Write_Line (" C check comment format (one space)");
637 Write_Line (" d check no DOS line terminators");
638 Write_Line (" e check end/exit labels present");
639 Write_Line (" f check no form feeds/vertical tabs in source");
640 Write_Line (" g check standard GNAT style rules, same as ydISux");
641 Write_Line (" h check no horizontal tabs in source");
642 Write_Line (" i check if-then layout");
643 Write_Line (" I check mode in");
644 Write_Line (" k check casing rules for keywords");
645 Write_Line (" l check reference manual layout");
646 Write_Line (" Lnn check max nest level < nn ");
647 Write_Line (" m check line length <= 79 characters");
648 Write_Line (" Mnn check line length <= nn characters");
649 Write_Line (" n check casing of package Standard identifiers");
650 Write_Line (" N turn off all checks");
651 Write_Line (" o check subprogram bodies in alphabetical order");
652 Write_Line (" O check overriding indicators");
653 Write_Line (" p check pragma casing");
654 Write_Line (" r check casing for identifier references");
655 Write_Line (" s check separate subprogram specs present");
656 Write_Line (" S check separate lines after THEN or ELSE");
657 Write_Line (" t check token separation rules");
658 Write_Line (" u check no unnecessary blank lines");
659 Write_Line (" x check extra parentheses around conditionals");
660 Write_Line (" y turn on default style checks");
661 Write_Line (" - subtract (turn off) subsequent checks");
662 Write_Line (" + add (turn on) subsequent checks");
663
664 -- Lines for -gnatyN switch
665
666 Write_Switch_Char ("yN");
667 Write_Line ("Cancel all previously set style checks");
668
669 -- Lines for -gnatzc switch
670
671 Write_Switch_Char ("zc");
672 Write_Line ("Distribution stub generation for caller stubs");
673
674 -- Lines for -gnatzr switch
675
676 Write_Switch_Char ("zr");
677 Write_Line ("Distribution stub generation for receiver stubs");
678
679 if not Latest_Ada_Only then
680
681 -- Line for -gnat83 switch
682
683 Write_Switch_Char ("83");
684 Write_Line ("Ada 83 mode");
685
686 -- Line for -gnat95 switch
687
688 Write_Switch_Char ("95");
689
690 if Ada_Version_Default = Ada_95 then
691 Write_Line ("Ada 95 mode (default)");
692 else
693 Write_Line ("Ada 95 mode");
694 end if;
695
696 -- Line for -gnat2005 switch
697
698 Write_Switch_Char ("2005");
699
700 if Ada_Version_Default = Ada_2005 then
701 Write_Line ("Ada 2005 mode (default)");
702 else
703 Write_Line ("Ada 2005 mode");
704 end if;
705 end if;
706
707 -- Line for -gnat2012 switch
708
709 Write_Switch_Char ("2012");
710
711 if Ada_Version_Default = Ada_2012 then
712 Write_Line ("Ada 2012 mode (default)");
713 else
714 Write_Line ("Ada 2012 mode");
715 end if;
716
717 -- Line for -gnat-p switch
718
719 Write_Switch_Char ("-p");
720 Write_Line ("Cancel effect of previous -gnatp switch");
721
722 end Usage;
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