1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 with Targparm; use Targparm;
28 with Namet; use Namet;
30 with Osint; use Osint;
31 with Output; use Output;
33 with System.WCh_Con; use System.WCh_Con;
37 procedure Write_Switch_Char (Sw : String; Prefix : String := "gnat");
38 -- Output two spaces followed by the switch character minus followed
39 -- Prefix, followed by the string given as the argument, and then
40 -- enough blanks to tab to column 13, i.e. assuming Sw is not longer
41 -- than 5 characters, the maximum allowed, Write_Switch_Char will
42 -- always output exactly 12 characters.
44 -----------------------
45 -- Write_Switch_Char --
46 -----------------------
48 procedure Write_Switch_Char (Sw : String; Prefix : String := "gnat") is
54 for J in 1 .. 12 - 3 - Prefix'Length - Sw'Length loop
57 end Write_Switch_Char;
59 -- Start of processing for Usage
64 -- For gnatmake, we are appending this information to the end of
65 -- the normal gnatmake output, so generate appropriate header
68 and then (Name_Buffer (Name_Len - 7 .. Name_Len) = "gnatmake"
70 Name_Buffer (Name_Len - 7 .. Name_Len) = "GNATMAKE")
73 Write_Line ("Compiler switches (passed to the compiler by gnatmake):");
78 Write_Str ("Usage: ");
81 Write_Str ("switches sfile");
87 Write_Line (" sfile Source file name");
92 -- Common GCC switches not available in JGNAT/MGNAT
94 if VM_Target = No_VM then
95 Write_Switch_Char ("fstack-check ", "");
96 Write_Line ("Generate stack checking code");
98 Write_Switch_Char ("fno-inline ", "");
99 Write_Line ("Inhibit all inlining (makes executable smaller)");
102 -- Common switches available to both GCC and JGNAT
104 Write_Switch_Char ("g ", "");
105 Write_Line ("Generate debugging information");
107 Write_Switch_Char ("Idir ", "");
108 Write_Line ("Specify source files search path");
110 Write_Switch_Char ("I- ", "");
111 Write_Line ("Do not look for sources in current directory");
113 Write_Switch_Char ("O[0123] ", "");
114 Write_Line ("Control the optimization level");
118 -- Individual lines for switches. Write_Switch_Char outputs fourteen
119 -- characters, so the remaining message is allowed to be a maximum
120 -- of 65 characters to be comfortable on an 80 character device.
121 -- If the Write_Str fits on one line, it is short enough!
123 -- Line for -gnata switch
125 Write_Switch_Char ("a");
126 Write_Line ("Assertions enabled. Pragma Assert/Debug to be activated");
128 -- Line for -gnatA switch
130 Write_Switch_Char ("A");
131 Write_Line ("Avoid processing gnat.adc, if present file will be ignored");
133 -- Line for -gnatb switch
135 Write_Switch_Char ("b");
136 Write_Line ("Generate brief messages to stderr even if verbose mode set");
138 -- Line for -gnatc switch
140 Write_Switch_Char ("c");
141 Write_Line ("Check syntax and semantics only (no code generation)");
143 -- Line for -gnatd switch
145 Write_Switch_Char ("d?");
146 Write_Line ("Compiler debug option ? ([.]a-z,A-Z,0-9), see debug.adb");
148 -- Line for -gnatD switch
150 Write_Switch_Char ("D");
151 Write_Line ("Debug expanded generated code rather than source code");
153 -- Line for -gnatec switch
155 Write_Switch_Char ("ec=?");
156 Write_Line ("Specify configuration pragmas file, e.g. -gnatec=/x/f.adc");
158 -- Line for -gnateD switch
160 Write_Switch_Char ("eD?");
161 Write_Line ("Define or redefine preprocessing symbol, e.g. -gnateDsym=val");
163 -- Line for -gnatef switch
165 Write_Switch_Char ("ef");
166 Write_Line ("Full source path in brief error messages");
168 -- Line for -gnateI switch
170 Write_Switch_Char ("eInn");
171 Write_Line ("Index in multi-unit source, e.g. -gnateI2");
173 -- Line for -gnatem switch
175 Write_Switch_Char ("em=?");
176 Write_Line ("Specify mapping file, e.g. -gnatem=mapping");
178 -- Line for -gnatep switch
180 Write_Switch_Char ("ep=?");
181 Write_Line ("Specify preprocessing data file, e.g. -gnatep=prep.data");
183 -- Line for -gnatE switch
185 Write_Switch_Char ("E");
186 Write_Line ("Dynamic elaboration checking mode enabled");
188 -- Line for -gnatf switch
190 Write_Switch_Char ("f");
191 Write_Line ("Full errors. Verbose details, all undefined references");
193 -- Line for -gnatF switch
195 Write_Switch_Char ("F");
196 Write_Line ("Force all import/export external names to all uppercase");
198 -- Line for -gnatg switch
200 Write_Switch_Char ("g");
201 Write_Line ("GNAT implementation mode (used for compiling GNAT units)");
203 -- Line for -gnatG switch
205 Write_Switch_Char ("G");
206 Write_Line ("Output generated expanded code in source form");
208 -- Line for -gnath switch
210 Write_Switch_Char ("h");
211 Write_Line ("Output this usage (help) information");
213 -- Line for -gnati switch
215 Write_Switch_Char ("i?");
216 Write_Line ("Identifier char set (?=1/2/3/4/5/8/9/p/f/n/w)");
218 -- Line for -gnatI switch
220 Write_Switch_Char ("I");
221 Write_Line ("Ignore all representation clauses");
223 -- Line for -gnatj switch
225 Write_Switch_Char ("jnn");
226 Write_Line ("Format error and warning messages to fit nn character lines");
228 -- Line for -gnatk switch
230 Write_Switch_Char ("k");
231 Write_Line ("Limit file names to nn characters (k = krunch)");
233 -- Lines for -gnatl switch
235 Write_Switch_Char ("l");
236 Write_Line ("Output full source listing with embedded error messages");
237 Write_Switch_Char ("l=f");
238 Write_Line ("Output full source listing to specified file");
240 -- Line for -gnatL switch
242 Write_Switch_Char ("L");
243 Write_Line ("List corresponding source text in -gnatG or -gnatD output");
245 -- Line for -gnatm switch
247 Write_Switch_Char ("mnn");
248 Write_Line ("Limit number of detected errors to nn (1-999999)");
250 -- Line for -gnatn switch
252 Write_Switch_Char ("n");
253 Write_Line ("Inlining of subprograms (apply pragma Inline across units)");
255 -- Line for -gnatN switch
257 Write_Switch_Char ("N");
258 Write_Line ("Full (frontend) inlining of subprograms");
260 -- Line for -gnato switch
262 Write_Switch_Char ("o");
263 Write_Line ("Enable overflow checking (off by default)");
265 -- Line for -gnatO switch
267 Write_Switch_Char ("O nm ");
268 Write_Line ("Set name of output ali file (internal switch)");
270 -- Line for -gnatp switch
272 Write_Switch_Char ("p");
273 Write_Line ("Suppress all checks");
275 -- Line for -gnatP switch
277 Write_Switch_Char ("P");
278 Write_Line ("Generate periodic calls to System.Polling.Poll");
280 -- Line for -gnatq switch
282 Write_Switch_Char ("q");
283 Write_Line ("Don't quit, try semantics, even if parse errors");
285 -- Line for -gnatQ switch
287 Write_Switch_Char ("Q");
288 Write_Line ("Don't quit, write ali/tree file even if compile errors");
290 -- Lines for -gnatR switch
292 Write_Switch_Char ("R?");
293 Write_Line ("List rep info (?=0/1/2/3 for none/types/all/variable)");
294 Write_Switch_Char ("R?s");
295 Write_Line ("List rep info to file.rep instead of standard output");
297 -- Lines for -gnats switch
299 Write_Switch_Char ("s");
300 Write_Line ("Syntax check only");
302 -- Lines for -gnatS switch
304 Write_Switch_Char ("S");
305 Write_Line ("Print listing of package Standard");
307 -- Lines for -gnatt switch
309 Write_Switch_Char ("t");
310 Write_Line ("Tree output file to be generated");
312 -- Line for -gnatT switch
314 Write_Switch_Char ("Tnn");
315 Write_Line ("All compiler tables start at nn times usual starting size");
317 -- Line for -gnatu switch
319 Write_Switch_Char ("u");
320 Write_Line ("List units for this compilation");
322 -- Line for -gnatU switch
324 Write_Switch_Char ("U");
325 Write_Line ("Enable unique tag for error messages");
327 -- Line for -gnatv switch
329 Write_Switch_Char ("v");
330 Write_Line ("Verbose mode. Full error output with source lines to stdout");
332 -- Line for -gnatV switch
334 Write_Switch_Char ("Vxx");
336 ("Enable selected validity checking mode, xx = list of parameters:");
337 Write_Line (" a turn on all validity checking options");
338 Write_Line (" c turn on checking for copies");
339 Write_Line (" C turn off checking for copies");
340 Write_Line (" d turn on default (RM) checking");
341 Write_Line (" D turn off default (RM) checking");
342 Write_Line (" e turn on checking for elementary components");
343 Write_Line (" E turn off checking for elementary components");
344 Write_Line (" f turn on checking for floating-point");
345 Write_Line (" F turn off checking for floating-point");
346 Write_Line (" i turn on checking for in params");
347 Write_Line (" I turn off checking for in params");
348 Write_Line (" m turn on checking for in out params");
349 Write_Line (" M turn off checking for in out params");
350 Write_Line (" o turn on checking for operators/attributes");
351 Write_Line (" O turn off checking for operators/attributes");
352 Write_Line (" p turn on checking for parameters");
353 Write_Line (" P turn off checking for parameters");
354 Write_Line (" r turn on checking for returns");
355 Write_Line (" R turn off checking for returns");
356 Write_Line (" s turn on checking for subscripts");
357 Write_Line (" S turn off checking for subscripts");
358 Write_Line (" t turn on checking for tests");
359 Write_Line (" T turn off checking for tests");
360 Write_Line (" n turn off all validity checks (including RM)");
362 -- Lines for -gnatw switch
364 Write_Switch_Char ("wxx");
365 Write_Line ("Enable selected warning modes, xx = list of parameters:");
366 Write_Line (" a turn on all optional warnings (except d,h,l,t)");
367 Write_Line (" A turn off all optional warnings");
368 Write_Line (" b turn on warnings for bad fixed value " &
369 "(not multiple of small)");
370 Write_Line (" B* turn off warnings for bad fixed value " &
371 "(not multiple of small)");
372 Write_Line (" c turn on warnings for constant conditional");
373 Write_Line (" C* turn off warnings for constant conditional");
374 Write_Line (" .c turn on warnings for unrepped components");
375 Write_Line (" .C* turn off warnings for unrepped components");
376 Write_Line (" d turn on warnings for implicit dereference");
377 Write_Line (" D* turn off warnings for implicit dereference");
378 Write_Line (" e treat all warnings as errors");
379 Write_Line (" f turn on warnings for unreferenced formal");
380 Write_Line (" F* turn off warnings for unreferenced formal");
381 Write_Line (" g* turn on warnings for unrecognized pragma");
382 Write_Line (" G turn off warnings for unrecognized pragma");
383 Write_Line (" h turn on warnings for hiding variable ");
384 Write_Line (" H* turn off warnings for hiding variable");
385 Write_Line (" i* turn on warnings for implementation unit");
386 Write_Line (" I turn off warnings for implementation unit");
387 Write_Line (" j turn on warnings for obsolescent " &
388 "(annex J) feature");
389 Write_Line (" J* turn off warnings for obsolescent " &
390 "(annex J) feature");
391 Write_Line (" k turn on warnings on constant variable");
392 Write_Line (" K* turn off warnings on constant variable");
393 Write_Line (" l turn on warnings for missing " &
394 "elaboration pragma");
395 Write_Line (" L* turn off warnings for missing " &
396 "elaboration pragma");
397 Write_Line (" m turn on warnings for variable assigned " &
399 Write_Line (" M* turn off warnings for variable assigned " &
401 Write_Line (" n* normal warning mode (cancels -gnatws/-gnatwe)");
402 Write_Line (" o* turn on warnings for address clause overlay");
403 Write_Line (" O turn off warnings for address clause overlay");
404 Write_Line (" p turn on warnings for ineffective pragma " &
405 "Inline in frontend");
406 Write_Line (" P* turn off warnings for ineffective pragma " &
407 "Inline in frontend");
408 Write_Line (" q* turn on warnings for questionable " &
409 "missing parentheses");
410 Write_Line (" Q turn off warnings for questionable " &
411 "missing parentheses");
412 Write_Line (" r turn on warnings for redundant construct");
413 Write_Line (" R* turn off warnings for redundant construct");
414 Write_Line (" .r turn on warnings for object renaming function");
415 Write_Line (" .R* turn off warnings for object renaming function");
416 Write_Line (" s suppress all warnings");
417 Write_Line (" t turn on warnings for tracking deleted code");
418 Write_Line (" T* turn off warnings for tracking deleted code");
419 Write_Line (" u turn on warnings for unused entity");
420 Write_Line (" U* turn off warnings for unused entity");
421 Write_Line (" v* turn on warnings for unassigned variable");
422 Write_Line (" V turn off warnings for unassigned variable");
423 Write_Line (" w* turn on warnings for wrong low bound assumption");
424 Write_Line (" W turn off warnings for wrong low bound " &
426 Write_Line (" x* turn on warnings for export/import");
427 Write_Line (" X turn off warnings for export/import");
428 Write_Line (" .x turn on warnings for non-local exceptions");
429 Write_Line (" .X* turn off warnings for non-local exceptions");
430 Write_Line (" y* turn on warnings for Ada 2005 incompatibility");
431 Write_Line (" Y turn off warnings for Ada 2005 incompatibility");
432 Write_Line (" z* turn on convention/size/align warnings for " &
433 "unchecked conversion");
434 Write_Line (" Z turn off convention/size/align warnings for " &
435 "unchecked conversion");
436 Write_Line (" * indicates default in above list");
438 -- Line for -gnatW switch
440 Write_Switch_Char ("W");
441 Write_Str ("Wide character encoding method (");
443 for J in WC_Encoding_Method loop
444 Write_Char (WC_Encoding_Letters (J));
446 if J = WC_Encoding_Method'Last then
455 -- Line for -gnatx switch
457 Write_Switch_Char ("x");
458 Write_Line ("Suppress output of cross-reference information");
460 -- Line for -gnatX switch
462 Write_Switch_Char ("X");
463 Write_Line ("Language extensions permitted");
465 -- Lines for -gnaty switch
467 Write_Switch_Char ("y");
468 Write_Line ("Enable default style checks (same as -gnaty3abcefhiklmnprst)");
469 Write_Switch_Char ("yxx");
470 Write_Line ("Enable selected style checks xx = list of parameters:");
471 Write_Line (" 1-9 check indentation");
472 Write_Line (" a check attribute casing");
473 Write_Line (" A check array attribute indexes");
474 Write_Line (" b check no blanks at end of lines");
475 Write_Line (" c check comment format");
476 Write_Line (" d check no DOS line terminators");
477 Write_Line (" e check end/exit labels present");
478 Write_Line (" f check no form feeds/vertical tabs in source");
479 Write_Line (" g check standard GNAT style rules");
480 Write_Line (" h check no horizontal tabs in source");
481 Write_Line (" i check if-then layout");
482 Write_Line (" I check mode in");
483 Write_Line (" k check casing rules for keywords");
484 Write_Line (" l check reference manual layout");
485 Write_Line (" Lnn check max nest level < nn ");
486 Write_Line (" m check line length <= 79 characters");
487 Write_Line (" n check casing of package Standard identifiers");
488 Write_Line (" Mnn check line length <= nn characters");
489 Write_Line (" o check subprogram bodies in alphabetical order");
490 Write_Line (" p check pragma casing");
491 Write_Line (" r check casing for identifier references");
492 Write_Line (" s check separate subprogram specs present");
493 Write_Line (" S check separate lines after THEN or ELSE");
494 Write_Line (" t check token separation rules");
495 Write_Line (" u check no unnecessary blank lines");
496 Write_Line (" x check extra parentheses around conditionals");
498 -- Lines for -gnatyN switch
500 Write_Switch_Char ("yN");
501 Write_Line ("Cancel all previously set style checks");
503 -- Lines for -gnatz switch
505 Write_Switch_Char ("z");
506 Write_Line ("Distribution stub generation (r/c for receiver/caller stubs)");
508 -- Line for -gnat83 switch
510 Write_Switch_Char ("83");
511 Write_Line ("Enforce Ada 83 restrictions");
513 -- Line for -gnat95 switch
515 Write_Switch_Char ("95");
517 if Ada_Version_Default = Ada_95 then
518 Write_Line ("Ada 95 mode (default)");
520 Write_Line ("Enforce Ada 95 restrictions");
523 -- Line for -gnat05 switch
525 Write_Switch_Char ("05");
527 if Ada_Version_Default = Ada_05 then
528 Write_Line ("Ada 2005 mode (default)");
530 Write_Line ("Allow Ada 2005 extensions");