gcc/ada/usage.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                               U S A G E                                  --
   6 --                                                                          --
   7 --                                B o d y                                   --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2006, 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 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.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 with Hostparm;
  28 with Namet;          use Namet;
  29 with Opt;            use Opt;
  30 with Osint;          use Osint;
  31 with Output;         use Output;
  32 with System.WCh_Con; use System.WCh_Con;
  33
  34 procedure Usage is
  35
  36    procedure Write_Switch_Char (Sw : String; Prefix : String := "gnat");
  37    --  Output two spaces followed by the switch character minus followed
  38    --  Prefix, followed by the string given as the argument, and then
  39    --  enough blanks to tab to column 13, i.e. assuming Sw is not longer
  40    --  than 5 characters, the maximum allowed, Write_Switch_Char will
  41    --  always output exactly 12 characters.
  42
  43    procedure Write_Switch_Char (Sw : String; Prefix : String := "gnat") is
  44    begin
  45       Write_Str ("  -");
  46       Write_Str (Prefix);
  47       Write_Str (Sw);
  48
  49       for J in 1 .. 12 - 3 - Prefix'Length - Sw'Length loop
  50          Write_Char (' ');
  51       end loop;
  52    end Write_Switch_Char;
  53
  54 --  Start of processing for Usage
  55
  56 begin
  57    Find_Program_Name;
  58
  59    --  For gnatmake, we are appending this information to the end of
  60    --  the normal gnatmake output, so generate appropriate header
  61
  62    if Name_Len >= 8
  63      and then (Name_Buffer (Name_Len - 7 .. Name_Len) = "gnatmake"
  64                  or else
  65                Name_Buffer (Name_Len - 7 .. Name_Len) = "GNATMAKE")
  66    then
  67       Write_Eol;
  68       Write_Line ("Compiler switches (passed to the compiler by gnatmake):");
  69
  70    else
  71       --  Usage line
  72
  73       Write_Str ("Usage: ");
  74       Write_Program_Name;
  75       Write_Char (' ');
  76       Write_Str ("switches sfile");
  77       Write_Eol;
  78       Write_Eol;
  79
  80       --  Line for sfile
  81
  82       Write_Line ("  sfile     Source file name");
  83    end if;
  84
  85    Write_Eol;
  86
  87    --  Common GCC switches not available in JGNAT
  88
  89    if not Hostparm.Java_VM then
  90       Write_Switch_Char ("fstack-check ", "");
  91       Write_Line ("Generate stack checking code");
  92
  93       Write_Switch_Char ("fno-inline   ", "");
  94       Write_Line ("Inhibit all inlining (makes executable smaller)");
  95    end if;
  96
  97    --  Common switches available to both GCC and JGNAT
  98
  99    Write_Switch_Char ("g            ", "");
 100    Write_Line ("Generate debugging information");
 101
 102    Write_Switch_Char ("Idir         ", "");
 103    Write_Line ("Specify source files search path");
 104
 105    Write_Switch_Char ("I-           ", "");
 106    Write_Line ("Do not look for sources in current directory");
 107
 108    Write_Switch_Char ("O[0123]      ", "");
 109    Write_Line ("Control the optimization level");
 110
 111    Write_Eol;
 112
 113    --  Individual lines for switches. Write_Switch_Char outputs fourteen
 114    --  characters, so the remaining message is allowed to be a maximum
 115    --  of 65 characters to be comfortable on an 80 character device.
 116    --  If the Write_Str fits on one line, it is short enough!
 117
 118    --  Line for -gnata switch
 119
 120    Write_Switch_Char ("a");
 121    Write_Line ("Assertions enabled. Pragma Assert/Debug to be activated");
 122
 123    --  Line for -gnatA switch
 124
 125    Write_Switch_Char ("A");
 126    Write_Line ("Avoid processing gnat.adc, if present file will be ignored");
 127
 128    --  Line for -gnatb switch
 129
 130    Write_Switch_Char ("b");
 131    Write_Line ("Generate brief messages to stderr even if verbose mode set");
 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 -gnatd switch
 139
 140    Write_Switch_Char ("d?");
 141    Write_Line ("Compiler debug option ? ([.]a-z,A-Z,0-9), see debug.adb");
 142
 143    --  Line for -gnatD switch
 144
 145    Write_Switch_Char ("D");
 146    Write_Line ("Debug expanded generated code rather than source code");
 147
 148    --  Line for -gnatec switch
 149
 150    Write_Switch_Char ("ec=?");
 151    Write_Line ("Specify configuration pragmas file, e.g. -gnatec=/x/f.adc");
 152
 153    --  Line for -gnateD switch
 154
 155    Write_Switch_Char ("eD?");
 156    Write_Line ("Define or redefine preprocessing symbol, e.g. -gnateDsym=val");
 157
 158    --  Line for -gnatef switch
 159
 160    Write_Switch_Char ("ef");
 161    Write_Line ("Full source path in brief error messages");
 162
 163    --  Line for -gnateI switch
 164
 165    Write_Switch_Char ("eInn");
 166    Write_Line ("Index in multi-unit source, e.g. -gnateI2");
 167
 168    --  Line for -gnatem switch
 169
 170    Write_Switch_Char ("em=?");
 171    Write_Line ("Specify mapping file, e.g. -gnatem=mapping");
 172
 173    --  Line for -gnatep switch
 174
 175    Write_Switch_Char ("ep=?");
 176    Write_Line ("Specify preprocessing data file, e.g. -gnatep=prep.data");
 177
 178    --  Line for -gnatE switch
 179
 180    Write_Switch_Char ("E");
 181    Write_Line ("Dynamic elaboration checking mode enabled");
 182
 183    --  Line for -gnatf switch
 184
 185    Write_Switch_Char ("f");
 186    Write_Line ("Full errors. Verbose details, all undefined references");
 187
 188    --  Line for -gnatF switch
 189
 190    Write_Switch_Char ("F");
 191    Write_Line ("Force all import/export external names to all uppercase");
 192
 193    --  Line for -gnatg switch
 194
 195    Write_Switch_Char ("g");
 196    Write_Line ("GNAT implementation mode (used for compiling GNAT units)");
 197
 198    --  Line for -gnatG switch
 199
 200    Write_Switch_Char ("G");
 201    Write_Line ("Output generated expanded code in source form");
 202
 203    --  Line for -gnath switch
 204
 205    Write_Switch_Char ("h");
 206    Write_Line ("Output this usage (help) information");
 207
 208    --  Line for -gnati switch
 209
 210    Write_Switch_Char ("i?");
 211    Write_Line ("Identifier char set (?=1/2/3/4/5/8/9/p/f/n/w)");
 212
 213    --  Line for -gnatk switch
 214
 215    Write_Switch_Char ("k");
 216    Write_Line ("Limit file names to nn characters (k = krunch)");
 217
 218    --  Line for -gnatl switch
 219
 220    Write_Switch_Char ("l");
 221    Write_Line ("Output full source listing with embedded error messages");
 222
 223    --  Line for -gnatm switch
 224
 225    Write_Switch_Char ("mnn");
 226    Write_Line ("Limit number of detected errors to nn (1-999999)");
 227
 228    --  Line for -gnatn switch
 229
 230    Write_Switch_Char ("n");
 231    Write_Line ("Inlining of subprograms (apply pragma Inline across units)");
 232
 233    --  Line for -gnatN switch
 234
 235    Write_Switch_Char ("N");
 236    Write_Line ("Full (frontend) inlining of subprograms");
 237
 238    --  Line for -gnato switch
 239
 240    Write_Switch_Char ("o");
 241    Write_Line ("Enable overflow checking (off by default)");
 242
 243    --  Line for -gnatO switch
 244
 245    Write_Switch_Char ("O nm ");
 246    Write_Line ("Set name of output ali file (internal switch)");
 247
 248    --  Line for -gnatp switch
 249
 250    Write_Switch_Char ("p");
 251    Write_Line ("Suppress all checks");
 252
 253    --  Line for -gnatP switch
 254
 255    Write_Switch_Char ("P");
 256    Write_Line ("Generate periodic calls to System.Polling.Poll");
 257
 258    --  Line for -gnatq switch
 259
 260    Write_Switch_Char ("q");
 261    Write_Line ("Don't quit, try semantics, even if parse errors");
 262
 263    --  Line for -gnatQ switch
 264
 265    Write_Switch_Char ("Q");
 266    Write_Line ("Don't quit, write ali/tree file even if compile errors");
 267
 268    --  Lines for -gnatR switch
 269
 270    Write_Switch_Char ("R?");
 271    Write_Line ("List rep info (?=0/1/2/3 for none/types/all/variable)");
 272    Write_Switch_Char ("R?s");
 273    Write_Line ("List rep info to file.rep instead of standard output");
 274
 275    --  Lines for -gnats switch
 276
 277    Write_Switch_Char ("s");
 278    Write_Line ("Syntax check only");
 279
 280    --  Lines for -gnatS switch
 281
 282    Write_Switch_Char ("S");
 283    Write_Line ("Print listing of package Standard");
 284
 285    --  Lines for -gnatt switch
 286
 287    Write_Switch_Char ("t");
 288    Write_Line ("Tree output file to be generated");
 289
 290    --  Line for -gnatT switch
 291
 292    Write_Switch_Char ("Tnn");
 293    Write_Line ("All compiler tables start at nn times usual starting size");
 294
 295    --  Line for -gnatu switch
 296
 297    Write_Switch_Char ("u");
 298    Write_Line ("List units for this compilation");
 299
 300    --  Line for -gnatU switch
 301
 302    Write_Switch_Char ("U");
 303    Write_Line ("Enable unique tag for error messages");
 304
 305    --  Line for -gnatv switch
 306
 307    Write_Switch_Char ("v");
 308    Write_Line ("Verbose mode. Full error output with source lines to stdout");
 309
 310    --  Line for -gnatV switch
 311
 312    Write_Switch_Char ("Vxx");
 313    Write_Line
 314      ("Enable selected validity checking mode, xx = list of parameters:");
 315    Write_Line ("        a    turn on all validity checking options");
 316    Write_Line ("        c    turn on checking for copies");
 317    Write_Line ("        C    turn off checking for copies");
 318    Write_Line ("        d    turn on default (RM) checking");
 319    Write_Line ("        D    turn off default (RM) checking");
 320    Write_Line ("        f    turn on checking for floating-point");
 321    Write_Line ("        F    turn off checking for floating-point");
 322    Write_Line ("        i    turn on checking for in params");
 323    Write_Line ("        I    turn off checking for in params");
 324    Write_Line ("        m    turn on checking for in out params");
 325    Write_Line ("        M    turn off checking for in out params");
 326    Write_Line ("        o    turn on checking for operators/attributes");
 327    Write_Line ("        O    turn off checking for operators/attributes");
 328    Write_Line ("        p    turn on checking for parameters");
 329    Write_Line ("        P    turn off checking for parameters");
 330    Write_Line ("        r    turn on checking for returns");
 331    Write_Line ("        R    turn off checking for returns");
 332    Write_Line ("        s    turn on checking for subscripts");
 333    Write_Line ("        S    turn off checking for subscripts");
 334    Write_Line ("        t    turn on checking for tests");
 335    Write_Line ("        T    turn off checking for tests");
 336    Write_Line ("        n    turn off all validity checks (including RM)");
 337
 338    --  Lines for -gnatw switch
 339
 340    Write_Switch_Char ("wxx");
 341    Write_Line ("Enable selected warning modes, xx = list of parameters:");
 342    Write_Line ("        a    turn on all optional warnings (except d,h,l)");
 343    Write_Line ("        A    turn off all optional warnings");
 344    Write_Line ("        b    turn on warnings for bad fixed value " &
 345                                                   "(not multiple of small)");
 346    Write_Line ("        B*   turn off warnings for bad fixed value " &
 347                                                   "(not multiple of small)");
 348    Write_Line ("        c    turn on warnings for constant conditional");
 349    Write_Line ("        C*   turn off warnings for constant conditional");
 350    Write_Line ("        d    turn on warnings for implicit dereference");
 351    Write_Line ("        D*   turn off warnings for implicit dereference");
 352    Write_Line ("        e    treat all warnings as errors");
 353    Write_Line ("        f    turn on warnings for unreferenced formal");
 354    Write_Line ("        F*   turn off warnings for unreferenced formal");
 355    Write_Line ("        g*   turn on warnings for unrecognized pragma");
 356    Write_Line ("        G    turn off warnings for unrecognized pragma");
 357    Write_Line ("        h    turn on warnings for hiding variable ");
 358    Write_Line ("        H*   turn off warnings for hiding variable");
 359    Write_Line ("        i*   turn on warnings for implementation unit");
 360    Write_Line ("        I    turn off warnings for implementation unit");
 361    Write_Line ("        j    turn on warnings for obsolescent " &
 362                                                   "(annex J) feature");
 363    Write_Line ("        J*   turn off warnings for obsolescent " &
 364                                                   "(annex J) feature");
 365    Write_Line ("        k    turn on warnings on constant variable");
 366    Write_Line ("        K*   turn off warnings on constant variable");
 367    Write_Line ("        l    turn on warnings for missing " &
 368                                                   "elaboration pragma");
 369    Write_Line ("        L*   turn off warnings for missing " &
 370                                                   "elaboration pragma");
 371    Write_Line ("        m    turn on warnings for variable assigned " &
 372                                                   "but not read");
 373    Write_Line ("        M*   turn off warnings for variable assigned " &
 374                                                   "but not read");
 375    Write_Line ("        n*   normal warning mode (cancels -gnatws/-gnatwe)");
 376    Write_Line ("        o*   turn on warnings for address clause overlay");
 377    Write_Line ("        O    turn off warnings for address clause overlay");
 378    Write_Line ("        p    turn on warnings for ineffective pragma Inline");
 379    Write_Line ("        P*   turn off warnings for ineffective pragma Inline");
 380    Write_Line ("        r    turn on warnings for redundant construct");
 381    Write_Line ("        R*   turn off warnings for redundant construct");
 382    Write_Line ("        s    suppress all warnings");
 383    Write_Line ("        u    turn on warnings for unused entity");
 384    Write_Line ("        U*   turn off warnings for unused entity");
 385    Write_Line ("        v*   turn on warnings for unassigned variable");
 386    Write_Line ("        V    turn off warnings for unassigned variable");
 387    Write_Line ("        x*   turn on warnings for export/import");
 388    Write_Line ("        X    turn off warnings for export/import");
 389    Write_Line ("        y*   turn on warnings for Ada 2005 incompatibility");
 390    Write_Line ("        Y    turn off warnings for Ada 2005 incompatibility");
 391    Write_Line ("        z*   turn on size/align warnings for " &
 392                                                   "unchecked conversion");
 393    Write_Line ("        Z    turn off size/align warnings for " &
 394                                                   "unchecked conversion");
 395    Write_Line ("        *    indicates default in above list");
 396
 397    --  Line for -gnatW switch
 398
 399    Write_Switch_Char ("W");
 400    Write_Str ("Wide character encoding method (");
 401
 402    for J in WC_Encoding_Method loop
 403       Write_Char (WC_Encoding_Letters (J));
 404
 405       if J = WC_Encoding_Method'Last then
 406          Write_Char (')');
 407       else
 408          Write_Char ('/');
 409       end if;
 410    end loop;
 411
 412    Write_Eol;
 413
 414    --  Line for -gnatx switch
 415
 416    Write_Switch_Char ("x");
 417    Write_Line ("Suppress output of cross-reference information");
 418
 419    --  Line for -gnatX switch
 420
 421    Write_Switch_Char ("X");
 422    Write_Line ("Language extensions permitted");
 423
 424    --  Lines for -gnaty switch
 425
 426    Write_Switch_Char ("y");
 427    Write_Line ("Enable default style checks (same as -gnaty3abcefhiklmnprst)");
 428    Write_Switch_Char ("yxx");
 429    Write_Line ("Enable selected style checks xx = list of parameters:");
 430    Write_Line ("        1-9  check indentation");
 431    Write_Line ("        a    check attribute casing");
 432    Write_Line ("        b    check no blanks at end of lines");
 433    Write_Line ("        c    check comment format");
 434    Write_Line ("        d    check no DOS line terminators");
 435    Write_Line ("        e    check end/exit labels present");
 436    Write_Line ("        f    check no form feeds/vertical tabs in source");
 437    Write_Line ("        h    check no horizontal tabs in source");
 438    Write_Line ("        i    check if-then layout");
 439    Write_Line ("        I    check mode in");
 440    Write_Line ("        k    check casing rules for keywords");
 441    Write_Line ("        l    check reference manual layout");
 442    Write_Line ("        Lnn  check max nest level < nn ");
 443    Write_Line ("        m    check line length <= 79 characters");
 444    Write_Line ("        n    check casing of package Standard identifiers");
 445    Write_Line ("        Mnn  check line length <= nn  characters");
 446    Write_Line ("        o    check subprogram bodies in alphabetical order");
 447    Write_Line ("        p    check pragma casing");
 448    Write_Line ("        r    check casing for identifier references");
 449    Write_Line ("        s    check separate subprogram specs present");
 450    Write_Line ("        t    check token separation rules");
 451    Write_Line ("        u    check no unnecessary blank lines");
 452    Write_Line ("        x    check extra parens around conditionals");
 453
 454    --  Lines for -gnatyN switch
 455
 456    Write_Switch_Char ("yN");
 457    Write_Line ("Cancel all previously set style checks");
 458
 459    --  Lines for -gnatz switch
 460
 461    Write_Switch_Char ("z");
 462    Write_Line ("Distribution stub generation (r/c for receiver/caller stubs)");
 463
 464    --  Line for -gnat83 switch
 465
 466    Write_Switch_Char ("83");
 467    Write_Line ("Enforce Ada 83 restrictions");
 468
 469    --  Line for -gnat95 switch
 470
 471    Write_Switch_Char ("95");
 472
 473    if Ada_Version_Default = Ada_95 then
 474       Write_Line ("Ada 95 mode (default)");
 475    else
 476       Write_Line ("Enforce Ada 95 restrictions");
 477    end if;
 478
 479    --  Line for -gnat05 switch
 480
 481    Write_Switch_Char ("05");
 482
 483    if Ada_Version_Default = Ada_05 then
 484       Write_Line ("Ada 2005 mode (default)");
 485    else
 486       Write_Line ("Allow Ada 2005 extensions");
 487    end if;
 488
 489 end Usage;