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) 1992-2002, 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,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, 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 Osint;          use Osint;
  30 with Output;         use Output;
  31 with System.WCh_Con; use System.WCh_Con;
  32
  33 procedure Usage is
  34
  35    procedure Write_Switch_Char (Sw : String; Prefix : String := "gnat");
  36    --  Output two spaces followed by the switch character minus followed
  37    --  Prefix, followed by the string given as the argument, and then
  38    --  enough blanks to tab to column 13, i.e. assuming Sw is not longer
  39    --  than 5 characters, the maximum allowed, Write_Switch_Char will
  40    --  always output exactly 12 characters.
  41
  42    procedure Write_Switch_Char (Sw : String; Prefix : String := "gnat") is
  43    begin
  44       Write_Str ("  -");
  45       Write_Str (Prefix);
  46       Write_Str (Sw);
  47
  48       for J in 1 .. 12 - 3 - Prefix'Length - Sw'Length loop
  49          Write_Char (' ');
  50       end loop;
  51    end Write_Switch_Char;
  52
  53 --  Start of processing for Usage
  54
  55 begin
  56    Find_Program_Name;
  57
  58    --  For gnatmake, we are appending this information to the end of
  59    --  the normal gnatmake output, so generate appropriate header
  60
  61    if Name_Len >= 8
  62      and then (Name_Buffer (Name_Len - 7 .. Name_Len) = "gnatmake"
  63                  or else
  64                Name_Buffer (Name_Len - 7 .. Name_Len) = "GNATMAKE")
  65    then
  66       Write_Eol;
  67       Write_Line ("Compiler switches (passed to the compiler by gnatmake):");
  68
  69    else
  70       --  Usage line
  71
  72       Write_Str ("Usage: ");
  73       Write_Program_Name;
  74       Write_Char (' ');
  75       Write_Str ("switches sfile");
  76       Write_Eol;
  77       Write_Eol;
  78
  79       --  Line for sfile
  80
  81       Write_Line ("  sfile     Source file name");
  82    end if;
  83
  84    Write_Eol;
  85
  86    --  Common GCC switches not available in JGNAT
  87
  88    if not Hostparm.Java_VM then
  89       Write_Switch_Char ("fstack-check ", "");
  90       Write_Line ("Generate stack checking code");
  91
  92       Write_Switch_Char ("fno-inline   ", "");
  93       Write_Line ("Inhibit all inlining (makes executable smaller)");
  94    end if;
  95
  96    --  Common switches available to both GCC and JGNAT
  97
  98    Write_Switch_Char ("g            ", "");
  99    Write_Line ("Generate debugging information");
 100
 101    Write_Switch_Char ("Idir         ", "");
 102    Write_Line ("Specify source files search path");
 103
 104    Write_Switch_Char ("I-           ", "");
 105    Write_Line ("Do not look for sources in current directory");
 106
 107    Write_Switch_Char ("O[0123]      ", "");
 108    Write_Line ("Control the optimization level");
 109
 110    Write_Eol;
 111
 112    --  Individual lines for switches. Write_Switch_Char outputs fourteen
 113    --  characters, so the remaining message is allowed to be a maximum
 114    --  of 65 characters to be comfortable on an 80 character device.
 115    --  If the Write_Str fits on one line, it is short enough!
 116
 117    --  Line for -gnata switch
 118
 119    Write_Switch_Char ("a");
 120    Write_Line ("Assertions enabled. Pragma Assert/Debug to be activated");
 121
 122    --  Line for -gnatA switch
 123
 124    Write_Switch_Char ("A");
 125    Write_Line ("Avoid processing gnat.adc, if present file will be ignored");
 126
 127    --  Line for -gnatb switch
 128
 129    Write_Switch_Char ("b");
 130    Write_Line ("Generate brief messages to stderr even if verbose mode set");
 131
 132    --  Line for -gnatc switch
 133
 134    Write_Switch_Char ("c");
 135    Write_Line ("Check syntax and semantics only (no code generation)");
 136
 137    Write_Switch_Char ("C");
 138    Write_Line ("Compress names in external names and debug info tables");
 139
 140    --  Line for -gnatd switch
 141
 142    Write_Switch_Char ("d?");
 143    Write_Line ("Compiler debug option ? (a-z,A-Z,0-9), see debug.adb");
 144
 145    --  Line for -gnatD switch
 146
 147    Write_Switch_Char ("D");
 148    Write_Line ("Debug expanded generated code rather than source code");
 149
 150    --  Line for -gnatec switch
 151
 152    Write_Switch_Char ("ec?");
 153    Write_Line ("Specify configuration pragmas file, e.g. -gnatec/x/f.adc");
 154
 155    --  Line for -gnatem switch
 156
 157    Write_Switch_Char ("em?");
 158    Write_Line ("Specify mapping file, e.g. -gnatemmapping");
 159
 160    --  Line for -gnatE switch
 161
 162    Write_Switch_Char ("E");
 163    Write_Line ("Dynamic elaboration checking mode enabled");
 164
 165    --  Line for -gnatf switch
 166
 167    Write_Switch_Char ("f");
 168    Write_Line ("Full errors. Verbose details, all undefined references");
 169
 170    --  Line for -gnatF switch
 171
 172    Write_Switch_Char ("F");
 173    Write_Line ("Force all import/export external names to all uppercase");
 174
 175    --  Line for -gnatg switch
 176
 177    Write_Switch_Char ("g");
 178    Write_Line ("GNAT implementation mode (used for compiling GNAT units)");
 179
 180    --  Line for -gnatG switch
 181
 182    Write_Switch_Char ("G");
 183    Write_Line ("Output generated expanded code in source form");
 184
 185    --  Line for -gnath switch
 186
 187    Write_Switch_Char ("h");
 188    Write_Line ("Output this usage (help) information");
 189
 190    --  Line for -gnati switch
 191
 192    Write_Switch_Char ("i?");
 193    Write_Line ("Identifier char set (?=1/2/3/4/5/8/9/p/f/n/w)");
 194
 195    --  Line for -gnatk switch
 196
 197    Write_Switch_Char ("k");
 198    Write_Line ("Limit file names to nnn characters (k = krunch)");
 199
 200    --  Line for -gnatl switch
 201
 202    Write_Switch_Char ("l");
 203    Write_Line ("Output full source listing with embedded error messages");
 204
 205    --  Line for -gnatL switch
 206
 207    Write_Switch_Char ("L");
 208    Write_Line ("Use longjmp/setjmp for exception handling");
 209
 210    --  Line for -gnatm switch
 211
 212    Write_Switch_Char ("mnnn");
 213    Write_Line ("Limit number of detected errors to nnn (1-999)");
 214
 215    --  Line for -gnatn switch
 216
 217    Write_Switch_Char ("n");
 218    Write_Line ("Inlining of subprograms (apply pragma Inline across units)");
 219
 220    --  Line for -gnatN switch
 221
 222    Write_Switch_Char ("N");
 223    Write_Line ("Full (frontend) inlining of subprograqms");
 224
 225    --  Line for -gnato switch
 226
 227    Write_Switch_Char ("o");
 228    Write_Line ("Enable overflow checking (off by default)");
 229
 230    --  Line for -gnatO switch
 231
 232    Write_Switch_Char ("O nm ");
 233    Write_Line ("Set name of output ali file (internal switch)");
 234
 235    --  Line for -gnatp switch
 236
 237    Write_Switch_Char ("p");
 238    Write_Line ("Suppress all checks");
 239
 240    --  Line for -gnatP switch
 241
 242    Write_Switch_Char ("P");
 243    Write_Line ("Generate periodic calls to System.Polling.Poll");
 244
 245    --  Line for -gnatq switch
 246
 247    Write_Switch_Char ("q");
 248    Write_Line ("Don't quit, try semantics, even if parse errors");
 249
 250    --  Line for -gnatQ switch
 251
 252    Write_Switch_Char ("Q");
 253    Write_Line ("Don't quit, write ali/tree file even if compile errors");
 254
 255    --  Line for -gnatR switch
 256
 257    Write_Switch_Char ("R?");
 258    Write_Line ("List rep inf (?=0/1/2/3 for none/types/all/variable)");
 259
 260    --  Lines for -gnats switch
 261
 262    Write_Switch_Char ("s");
 263    Write_Line ("Syntax check only");
 264
 265    --  Lines for -gnatt switch
 266
 267    Write_Switch_Char ("t");
 268    Write_Line ("Tree output file to be generated");
 269
 270    --  Line for -gnatT switch
 271
 272    Write_Switch_Char ("Tnnn");
 273    Write_Line ("All compiler tables start at nnn times usual starting size");
 274
 275    --  Line for -gnatu switch
 276
 277    Write_Switch_Char ("u");
 278    Write_Line ("List units for this compilation");
 279
 280    --  Line for -gnatU switch
 281
 282    Write_Switch_Char ("U");
 283    Write_Line ("Enable unique tag for error messages");
 284
 285    --  Line for -gnatv switch
 286
 287    Write_Switch_Char ("v");
 288    Write_Line ("Verbose mode. Full error output with source lines to stdout");
 289
 290    --  Line for -gnatV switch
 291
 292    Write_Switch_Char ("Vxx");
 293    Write_Line
 294      ("Enable selected validity checking mode, xx = list of parameters:");
 295    Write_Line ("        a    turn on all validity checking options");
 296    Write_Line ("        c    turn on checking for copies");
 297    Write_Line ("        C    turn off checking for copies");
 298    Write_Line ("        d    turn on default (RM) checking");
 299    Write_Line ("        D    turn off default (RM) checking");
 300    Write_Line ("        f    turn on checking for floating-point");
 301    Write_Line ("        F    turn off checking for floating-point");
 302    Write_Line ("        i    turn on checking for in params");
 303    Write_Line ("        I    turn off checking for in params");
 304    Write_Line ("        m    turn on checking for in out params");
 305    Write_Line ("        M    turn off checking for in out params");
 306    Write_Line ("        o    turn on checking for operators/attributes");
 307    Write_Line ("        O    turn off checking for operators/attributes");
 308    Write_Line ("        r    turn on checking for returns");
 309    Write_Line ("        R    turn off checking for returns");
 310    Write_Line ("        s    turn on checking for subscripts");
 311    Write_Line ("        S    turn off checking for subscripts");
 312    Write_Line ("        t    turn on checking for tests");
 313    Write_Line ("        T    turn off checking for tests");
 314    Write_Line ("        n    turn off all validity checks (including RM)");
 315
 316    --  Lines for -gnatw switch
 317
 318    Write_Switch_Char ("wxx");
 319    Write_Line ("Enable selected warning modes, xx = list of parameters:");
 320    Write_Line ("        a    turn on all optional warnings (except b,d,h)");
 321    Write_Line ("        A    turn off all optional warnings");
 322    Write_Line ("        b    turn on biased rounding warnings");
 323    Write_Line ("        B    turn off biased rounding warnings");
 324    Write_Line ("        c    turn on constant conditional warnings");
 325    Write_Line ("        C*   turn off constant conditional warnings");
 326    Write_Line ("        d    turn on implicit dereference warnings");
 327    Write_Line ("        D*   turn off implicit dereference warnings");
 328    Write_Line ("        e    treat all warnings as errors");
 329    Write_Line ("        f    turn on unreferenced formal warnings");
 330    Write_Line ("        F*   turn off unreferenced formal warnings");
 331    Write_Line ("        h    turn on warnings for hiding variables");
 332    Write_Line ("        H*   turn off warnings for hiding variables");
 333    Write_Line ("        i*   turn on warnings for implementation units");
 334    Write_Line ("        I    turn off warnings for implementation units");
 335    Write_Line ("        l    turn on elaboration warnings");
 336    Write_Line ("        L*   turn off elaboration warnings");
 337    Write_Line ("        o*   turn on address clause overlay warnings");
 338    Write_Line ("        O    turn off address clause overlay warnings");
 339    Write_Line ("        p    turn on warnings for ineffective pragma inline");
 340    Write_Line ("        P*   turn off warnings for ineffective pragma inline");
 341    Write_Line ("        r    turn on redundant construct warnings");
 342    Write_Line ("        R*   turn off redundant construct warnings");
 343    Write_Line ("        s    suppress all warnings");
 344    Write_Line ("        u    turn on warnings for unused entities");
 345    Write_Line ("        U*   turn off warnings for unused entities");
 346    Write_Line ("        *    indicates default in above list");
 347
 348    --  Line for -gnatW switch
 349
 350    Write_Switch_Char ("W");
 351    Write_Str ("Wide character encoding method (");
 352
 353    for J in WC_Encoding_Method loop
 354       Write_Char (WC_Encoding_Letters (J));
 355
 356       if J = WC_Encoding_Method'Last then
 357          Write_Char (')');
 358       else
 359          Write_Char ('/');
 360       end if;
 361    end loop;
 362
 363    Write_Eol;
 364
 365    --  Line for -gnatx switch
 366
 367    Write_Switch_Char ("x");
 368    Write_Line ("Suppress output of cross-reference information");
 369
 370    --  Line for -gnatX switch
 371
 372    Write_Switch_Char ("X");
 373    Write_Line ("Language extensions permitted");
 374
 375    --  Lines for -gnaty switch
 376
 377    Write_Switch_Char ("y");
 378    Write_Line ("Enable all style checks except 'o', indent=3");
 379
 380    Write_Switch_Char ("yxx");
 381    Write_Line ("Enable selected style checks xx = list of parameters:");
 382    Write_Line ("        1-9  check indentation");
 383    Write_Line ("        a    check attribute casing");
 384    Write_Line ("        b    check no blanks at end of lines");
 385    Write_Line ("        c    check comment format");
 386    Write_Line ("        e    check end/exit labels present");
 387    Write_Line ("        f    check no form feeds/vertical tabs in source");
 388    Write_Line ("        h    check no horizontal tabs in source");
 389    Write_Line ("        i    check if-then layout");
 390    Write_Line ("        k    check casing rules for keywords, identifiers");
 391    Write_Line ("        l    check reference manual layout");
 392    Write_Line ("        m    check line length <= 79 characters");
 393    Write_Line ("        n    check casing of package Standard identifiers");
 394    Write_Line ("        Mnnn check line length <= nnn characters");
 395    Write_Line ("        o    check subprogram bodies in alphabetical order");
 396    Write_Line ("        p    check pragma casing");
 397    Write_Line ("        r    check RM column layout");
 398    Write_Line ("        s    check separate subprogram specs present");
 399    Write_Line ("        t    check token separation rules");
 400
 401    --  Lines for -gnatz switch
 402
 403    Write_Switch_Char ("z");
 404    Write_Line ("Distribution stub generation (r/s for receiver/sender stubs)");
 405
 406    --  Line for -gnatZ switch
 407
 408    Write_Switch_Char ("Z");
 409    Write_Line ("Use zero cost exception handling");
 410
 411    --  Line for -gnat83 switch
 412
 413    Write_Switch_Char ("83");
 414    Write_Line ("Enforce Ada 83 restrictions");
 415
 416 end Usage;