gcc/java/jvspec.c

   1 /* Specific flags and argument handling of the front-end of the
   2    GNU compiler for the Java(TM) language.
   3    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.
  22
  23 Java and all Java-based marks are trademarks or registered trademarks
  24 of Sun Microsystems, Inc. in the United States and other countries.
  25 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  26
  27 #include "config.h"
  28 #include "system.h"
  29 #include "coretypes.h"
  30 #include "tm.h"
  31 #include "gcc.h"
  32
  33 /* Name of spec file.  */
  34 #define SPEC_FILE "libgcj.spec"
  35
  36 /* This bit is set if we saw a `-xfoo' language specification.  */
  37 #define LANGSPEC        (1<<1)
  38 /* True if this arg is a parameter to the previous option-taking arg. */
  39 #define PARAM_ARG       (1<<2)
  40 /* True if this arg is a .java input file name. */
  41 #define JAVA_FILE_ARG   (1<<3)
  42 /* True if this arg is a .class input file name. */
  43 #define CLASS_FILE_ARG  (1<<4)
  44 /* True if this arg is a .zip or .jar input file name. */
  45 #define ZIP_FILE_ARG    (1<<5)
  46 /* True if this arg is @FILE - where FILE contains a list of filenames. */
  47 #define INDIRECT_FILE_ARG (1<<6)
  48 /* True if this arg is a resource file.  */
  49 #define RESOURCE_FILE_ARG (1<<7)
  50
  51 static char *find_spec_file     PARAMS ((const char *));
  52 static int verify_class_name    PARAMS ((const char *));
  53
  54 static const char *main_class_name = NULL;
  55 int lang_specific_extra_outfiles = 0;
  56
  57 /* True if we should add -shared-libgcc to the command-line.  */
  58 int shared_libgcc = 1;
  59
  60 static const char jvgenmain_spec[] =
  61   "jvgenmain %{D*} %b %m.i |\n\
  62    cc1 %m.i %1 \
  63                    %{!Q:-quiet} -dumpbase %b.c %{d*} %{m*} %{a*}\
  64                    %{g*} %{O*} \
  65                    %{v:-version} %{pg:-p} %{p}\
  66                    %<fbounds-check %<fno-bounds-check\
  67                    %<fassume-compiled %<fno-assume-compiled\
  68                    %<fcompile-resource* %<fassert %<fno-assert \
  69                    %<femit-class-file %<femit-class-files %<fencoding*\
  70                    %<fuse-boehm-gc %<fhash-synchronization %<fjni\
  71                    %<findirect-dispatch \
  72                    %<fno-store-check %<foutput-class-dir\
  73                    %<fclasspath* %<fCLASSPATH* %<fbootclasspath*\
  74                    %<fextdirs*\
  75                    %<fuse-divide-subroutine %<fno-use-divide-subroutine\
  76                    %<fcheck-references %<fno-check-references\
  77                    %<ffilelist-file\
  78                    %{f*} -fdollars-in-identifiers\
  79                    %{aux-info*}\
  80                    %{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\
  81                    %{S:%W{o*}%{!o*:-o %b.s}}\
  82    %(invoke_as)";
  83
  84 /* Return full path name of spec file if it is in DIR, or NULL if
  85    not.  */
  86 static char *
  87 find_spec_file (dir)
  88      const char *dir;
  89 {
  90   char *spec;
  91   int x;
  92   struct stat sb;
  93
  94   spec = xmalloc (strlen (dir) + sizeof (SPEC_FILE)
  95                   + sizeof ("-specs=") + 4);
  96   strcpy (spec, "-specs=");
  97   x = strlen (spec);
  98   strcat (spec, dir);
  99   strcat (spec, "/");
 100   strcat (spec, SPEC_FILE);
 101   if (! stat (spec + x, &sb))
 102     return spec;
 103   free (spec);
 104   return NULL;
 105 }
 106
 107 /* FIXME: these should come from lex.h.  */
 108 #define JAVA_START_CHAR_P(c) (c < 128 && (ISIDST (c) || c == '$'))
 109 #define JAVA_PART_CHAR_P(c) (c < 128                                          \
 110                              && (ISIDNUM (c)                                  \
 111                                  || c == '$'                                  \
 112                                  || (c >= 0x00 && c <= 0x08)                  \
 113                                  || (c >= 0x0e && c <= 0x1b)                  \
 114                                  || c == 0x7f))
 115
 116 /* Verify that NAME is a valid Java class name that might contain
 117    `main'.  Return 0 on failure.  */
 118 static int
 119 verify_class_name (name)
 120      const char *name;
 121 {
 122   /* FIXME: what encoding do we use for command-line arguments?  For
 123      now we assume plain ASCII, which of course is wrong.  */
 124   while (*name)
 125     {
 126       int ch = *name++;
 127       if (ch < 0 || ! JAVA_START_CHAR_P (ch))
 128         return 0;
 129       while (*name)
 130         {
 131           ch = *name++;
 132           if (ch < 0)
 133             return 0;
 134           /* We found a break between class names.  Next character
 135              must be an identifier start again.  */
 136           if (ch == '.')
 137             break;
 138           if (! JAVA_PART_CHAR_P (ch))
 139             return 0;
 140         }
 141     }
 142
 143   return 1;
 144 }
 145
 146 void
 147 lang_specific_driver (in_argc, in_argv, in_added_libraries)
 148      int *in_argc;
 149      const char *const **in_argv;
 150      int *in_added_libraries;
 151 {
 152   int i, j;
 153
 154   /* If nonzero, the user gave us the `-v' flag.  */
 155   int saw_verbose_flag = 0;
 156
 157   int saw_save_temps = 0;
 158
 159   /* This will be 0 if we encounter a situation where we should not
 160      link in libgcj.  */
 161   int library = 1;
 162
 163   /* This will be 1 if multiple input files (.class and/or .java)
 164      should be passed to a single jc1 invocation. */
 165   int combine_inputs = 0;
 166
 167   /* Number of .java and .class source file arguments seen. */
 168   int java_files_count = 0;
 169   int class_files_count = 0;
 170   /* Number of .zip or .jar file arguments seen. */
 171   int zip_files_count = 0;
 172   /* Number of '@FILES' arguments seen. */
 173   int indirect_files_count = 0;
 174
 175   /* Name of file containing list of files to compile. */
 176   char *filelist_filename = 0;
 177
 178   FILE *filelist_file = 0;
 179
 180   /* The number of arguments being added to what's in argv, other than
 181      libraries.  */
 182   int added = 2;
 183
 184   /* Used to track options that take arguments, so we don't go wrapping
 185      those with -xc++/-xnone.  */
 186   const char *quote = NULL;
 187
 188   /* The new argument list will be contained in this.  */
 189   const char **arglist;
 190
 191   /* Nonzero if we saw a `-xfoo' language specification on the
 192      command line.  Used to avoid adding our own -xc++ if the user
 193      already gave a language for the file.  */
 194   int saw_speclang = 0;
 195
 196 #if 0
 197   /* "-lm" or "-lmath" if it appears on the command line.  */
 198   const char *saw_math ATTRIBUTE_UNUSED = 0;
 199
 200   /* "-lc" if it appears on the command line.  */
 201   const char *saw_libc ATTRIBUTE_UNUSED = 0;
 202
 203   /* "-lgcjgc" if it appears on the command line.  */
 204   const char *saw_gc ATTRIBUTE_UNUSED = 0;
 205
 206   /* Saw `-l' option for the thread library.  */
 207   const char *saw_threadlib ATTRIBUTE_UNUSED = 0;
 208
 209   /* Saw `-lgcj' on command line.  */
 210   int saw_libgcj ATTRIBUTE_UNUSED = 0;
 211 #endif
 212
 213   /* Saw --resource, -C or -o options, respectively. */
 214   int saw_resource = 0;
 215   int saw_C = 0;
 216   int saw_o = 0;
 217
 218   /* Saw some -O* or -g* option, respectively. */
 219   int saw_O = 0;
 220   int saw_g = 0;
 221
 222   /* Saw a `-D' option.  */
 223   int saw_D = 0;
 224
 225   /* An array used to flag each argument that needs a bit set for
 226      LANGSPEC, MATHLIB, WITHLIBC, or GCLIB.  */
 227   int *args;
 228
 229   /* The total number of arguments with the new stuff.  */
 230   int argc;
 231
 232   /* The argument list.  */
 233   const char *const *argv;
 234
 235   /* The number of libraries added in.  */
 236   int added_libraries;
 237
 238   /* The total number of arguments with the new stuff.  */
 239   int num_args = 1;
 240
 241   /* Nonzero if linking is supposed to happen.  */
 242   int will_link = 1;
 243
 244   /* Nonzero if we want to find the spec file.  */
 245   int want_spec_file = 1;
 246
 247   /* The argument we use to specify the spec file.  */
 248   char *spec_file = NULL;
 249
 250   argc = *in_argc;
 251   argv = *in_argv;
 252   added_libraries = *in_added_libraries;
 253
 254   args = xcalloc (argc, sizeof (int));
 255
 256   for (i = 1; i < argc; i++)
 257     {
 258       /* If the previous option took an argument, we swallow it here.  */
 259       if (quote)
 260         {
 261           quote = NULL;
 262           args[i] |= PARAM_ARG;
 263           continue;
 264         }
 265
 266       /* We don't do this anymore, since we don't get them with minus
 267          signs on them.  */
 268       if (argv[i][0] == '\0' || argv[i][1] == '\0')
 269         continue;
 270
 271       if (argv[i][0] == '-')
 272         {
 273           if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
 274                                || strcmp (argv[i], "-nodefaultlibs") == 0))
 275             {
 276               library = 0;
 277             }
 278           else if (strncmp (argv[i], "-fmain=", 7) == 0)
 279             {
 280               main_class_name = argv[i] + 7;
 281               added--;
 282             }
 283           else if (strcmp (argv[i], "-fhelp") == 0)
 284             want_spec_file = 0;
 285           else if (strcmp (argv[i], "-v") == 0)
 286             {
 287               saw_verbose_flag = 1;
 288               if (argc == 2)
 289                 {
 290                   /* If they only gave us `-v', don't try to link
 291                      in libgcj.  */
 292                   library = 0;
 293                 }
 294             }
 295           else if (strncmp (argv[i], "-x", 2) == 0)
 296             saw_speclang = 1;
 297           else if (strcmp (argv[i], "-C") == 0)
 298             {
 299               saw_C = 1;
 300               want_spec_file = 0;
 301               if (library != 0)
 302                 added -= 2;
 303               library = 0;
 304               will_link = 0;
 305             }
 306           else if (strncmp (argv[i], "-fcompile-resource=", 19) == 0)
 307             {
 308               saw_resource = 1;
 309               want_spec_file = 0;
 310               if (library != 0)
 311                 --added;
 312               library = 0;
 313               will_link = 0;
 314             }
 315           else if (argv[i][1] == 'D')
 316             saw_D = 1;
 317           else if (argv[i][1] == 'g')
 318             saw_g = 1;
 319           else if (argv[i][1] == 'O')
 320             saw_O = 1;
 321           else if ((argv[i][2] == '\0'
 322                     && (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
 323                    || strcmp (argv[i], "-Tdata") == 0
 324                    || strcmp (argv[i], "-MT") == 0
 325                    || strcmp (argv[i], "-MF") == 0)
 326             {
 327               if (strcmp (argv[i], "-o") == 0)
 328                 saw_o = 1;
 329               quote = argv[i];
 330             }
 331           else if (strcmp(argv[i], "-classpath") == 0
 332                    || strcmp(argv[i], "-bootclasspath") == 0
 333                    || strcmp(argv[i], "-CLASSPATH") == 0)
 334             {
 335               quote = argv[i];
 336               added -= 1;
 337             }
 338           else if (library != 0
 339                    && ((argv[i][2] == '\0'
 340                         && (char *) strchr ("cSEM", argv[i][1]) != NULL)
 341                        || strcmp (argv[i], "-MM") == 0))
 342             {
 343               /* Don't specify libraries if we won't link, since that would
 344                  cause a warning.  */
 345               library = 0;
 346               added -= 2;
 347
 348               /* Remember this so we can confirm -fmain option.  */
 349               will_link = 0;
 350             }
 351           else if (strcmp (argv[i], "-d") == 0)
 352             {
 353               /* `-d' option is for javac compatibility.  */
 354               quote = argv[i];
 355               added -= 1;
 356             }
 357           else if (strcmp (argv[i], "-fsyntax-only") == 0
 358                    || strcmp (argv[i], "--syntax-only") == 0)
 359             {
 360               want_spec_file = 0;
 361               library = 0;
 362               will_link = 0;
 363               continue;
 364             }
 365           else if (strcmp (argv[i], "-save-temps") == 0)
 366             saw_save_temps = 1;
 367           else if (strcmp (argv[i], "-static-libgcc") == 0
 368                    || strcmp (argv[i], "-static") == 0)
 369             shared_libgcc = 0;
 370           else
 371             /* Pass other options through.  */
 372             continue;
 373         }
 374       else
 375         {
 376           int len;
 377
 378           if (saw_speclang)
 379             {
 380               saw_speclang = 0;
 381               continue;
 382             }
 383
 384           if (saw_resource)
 385             {
 386               args[i] |= RESOURCE_FILE_ARG;
 387               added += 2;  /* for -xjava and -xnone */
 388             }
 389
 390           if (argv[i][0] == '@')
 391             {
 392               args[i] |= INDIRECT_FILE_ARG;
 393               indirect_files_count++;
 394               added += 2;  /* for -xjava and -xnone */
 395             }
 396
 397           len = strlen (argv[i]);
 398           if (len > 5 && strcmp (argv[i] + len - 5, ".java") == 0)
 399             {
 400               args[i] |= JAVA_FILE_ARG;
 401               java_files_count++;
 402             }
 403           if (len > 6 && strcmp (argv[i] + len - 6, ".class") == 0)
 404             {
 405               args[i] |= CLASS_FILE_ARG;
 406               class_files_count++;
 407             }
 408           if (len > 4
 409               && (strcmp (argv[i] + len - 4, ".zip") == 0
 410                   || strcmp (argv[i] + len - 4, ".jar") == 0))
 411             {
 412               args[i] |= ZIP_FILE_ARG;
 413               zip_files_count++;
 414             }
 415         }
 416     }
 417
 418   if (quote)
 419     fatal ("argument to `%s' missing\n", quote);
 420
 421   if (saw_D && ! main_class_name)
 422     fatal ("can't specify `-D' without `--main'\n");
 423
 424   if (main_class_name && ! verify_class_name (main_class_name))
 425     fatal ("`%s' is not a valid class name", main_class_name);
 426
 427   num_args = argc + added;
 428   if (saw_resource)
 429     {
 430       if (! saw_o)
 431         fatal ("--resource requires -o");
 432     }
 433   if (saw_C)
 434     {
 435       num_args += 3;
 436       if (class_files_count + zip_files_count > 0)
 437         {
 438           error ("warning: already-compiled .class files ignored with -C");
 439           num_args -= class_files_count + zip_files_count;
 440           class_files_count = 0;
 441           zip_files_count = 0;
 442         }
 443       num_args += 2;  /* For -o NONE. */
 444       if (saw_o)
 445         fatal ("cannot specify both -C and -o");
 446     }
 447   if ((saw_o && java_files_count + class_files_count + zip_files_count > 1)
 448       || (saw_C && java_files_count > 1)
 449       || (indirect_files_count > 0
 450           && java_files_count + class_files_count + zip_files_count > 0))
 451     combine_inputs = 1;
 452
 453   if (combine_inputs)
 454     {
 455       filelist_filename = make_temp_file ("jx");
 456       if (filelist_filename == NULL)
 457         fatal ("cannot create temporary file");
 458       record_temp_file (filelist_filename, ! saw_save_temps, 0);
 459       filelist_file = fopen (filelist_filename, "w");
 460       if (filelist_file == NULL)
 461         pfatal_with_name (filelist_filename);
 462       num_args -= java_files_count + class_files_count + zip_files_count;
 463       num_args += 2;  /* for the combined arg and "-xjava" */
 464     }
 465   /* If we know we don't have to do anything, bail now.  */
 466 #if 0
 467   if (! added && ! library && main_class_name == NULL && ! saw_C)
 468     {
 469       free (args);
 470       return;
 471     }
 472 #endif
 473
 474   if (main_class_name)
 475     {
 476       lang_specific_extra_outfiles++;
 477     }
 478   if (saw_g + saw_O == 0)
 479     num_args++;
 480   num_args++;
 481
 482   if (combine_inputs || indirect_files_count > 0)
 483     num_args += 1; /* for "-ffilelist-file" */
 484   if (combine_inputs && indirect_files_count > 0)
 485     fatal("using both @FILE with multiple files not implemented");
 486
 487   /* There's no point adding -shared-libgcc if we don't have a shared
 488      libgcc.  */
 489 #ifndef ENABLE_SHARED_LIBGCC
 490   shared_libgcc = 0;
 491 #endif
 492
 493   num_args += shared_libgcc;
 494
 495   arglist = xmalloc ((num_args + 1) * sizeof (char *));
 496   j = 0;
 497
 498   for (i = 0; i < argc; i++, j++)
 499     {
 500       arglist[j] = argv[i];
 501
 502       if ((args[i] & PARAM_ARG) || i == 0)
 503         continue;
 504
 505       if ((args[i] & RESOURCE_FILE_ARG) != 0)
 506         {
 507           arglist[j++] = "-xjava";
 508           arglist[j++] = argv[i];
 509           arglist[j] = "-xnone";
 510         }
 511
 512       if (strcmp (argv[i], "-classpath") == 0
 513           || strcmp (argv[i], "-bootclasspath") == 0
 514           || strcmp (argv[i], "-CLASSPATH") == 0)
 515         {
 516           arglist[j] = concat ("-f", argv[i]+1, "=", argv[i+1], NULL);
 517           i++;
 518           continue;
 519         }
 520
 521       if (strcmp (argv[i], "-d") == 0)
 522         {
 523           arglist[j] = concat ("-foutput-class-dir=", argv[i + 1], NULL);
 524           ++i;
 525           continue;
 526         }
 527
 528       if (spec_file == NULL && strncmp (argv[i], "-L", 2) == 0)
 529         spec_file = find_spec_file (argv[i] + 2);
 530
 531       if (strncmp (argv[i], "-fmain=", 7) == 0)
 532         {
 533           if (! will_link)
 534             fatal ("cannot specify `main' class when not linking");
 535           --j;
 536           continue;
 537         }
 538
 539       if ((args[i] & INDIRECT_FILE_ARG) != 0)
 540         {
 541           arglist[j++] = "-xjava";
 542           arglist[j++] = argv[i]+1;  /* Drop '@'. */
 543           arglist[j] = "-xnone";
 544         }
 545
 546       if ((args[i] & (CLASS_FILE_ARG|ZIP_FILE_ARG)) && saw_C)
 547         {
 548           --j;
 549           continue;
 550         }
 551
 552       if (combine_inputs
 553           && (args[i] & (CLASS_FILE_ARG|JAVA_FILE_ARG|ZIP_FILE_ARG)) != 0)
 554         {
 555           fputs (argv[i], filelist_file);
 556           fputc ('\n', filelist_file);
 557           --j;
 558           continue;
 559         }
 560   }
 561
 562   if (combine_inputs || indirect_files_count > 0)
 563     arglist[j++] = "-ffilelist-file";
 564
 565   if (combine_inputs)
 566     {
 567       if (fclose (filelist_file))
 568         pfatal_with_name (filelist_filename);
 569       arglist[j++] = "-xjava";
 570       arglist[j++] = filelist_filename;
 571     }
 572
 573   /* If we saw no -O or -g option, default to -g1, for javac compatibility. */
 574   if (saw_g + saw_O == 0)
 575     arglist[j++] = "-g1";
 576
 577   /* Read the specs file corresponding to libgcj.
 578      If we didn't find the spec file on the -L path, then we hope it
 579      is somewhere in the standard install areas.  */
 580   if (want_spec_file)
 581     arglist[j++] = spec_file == NULL ? "-specs=libgcj.spec" : spec_file;
 582
 583   if (saw_C)
 584     {
 585       arglist[j++] = "-fsyntax-only";
 586       arglist[j++] = "-femit-class-files";
 587       arglist[j++] = "-S";
 588       arglist[j++] = "-o";
 589       arglist[j++] = "NONE";
 590     }
 591
 592   if (shared_libgcc)
 593     arglist[j++] = "-shared-libgcc";
 594
 595   arglist[j] = NULL;
 596
 597   *in_argc = j;
 598   *in_argv = arglist;
 599   *in_added_libraries = added_libraries;
 600 }
 601
 602 int
 603 lang_specific_pre_link ()
 604 {
 605   int err;
 606   if (main_class_name == NULL)
 607     return 0;
 608   /* Append `main' to make the filename unique and allow
 609
 610         gcj --main=hello -save-temps hello.java
 611
 612      to work.  jvgenmain needs to strip this `main' to arrive at the correct
 613      class name.  Append dummy `.c' that can be stripped by set_input so %b
 614      is correct.  */
 615   set_input (concat (main_class_name, "main.c", NULL));
 616   err = do_spec (jvgenmain_spec);
 617   if (err == 0)
 618     {
 619       /* Shift the outfiles array so the generated main comes first.
 620          This is important when linking against (non-shared) libraries,
 621          since otherwise we risk (a) nothing getting linked or
 622          (b) 'main' getting picked up from a library. */
 623       int i = n_infiles;
 624       const char *generated = outfiles[i];
 625       while (--i >= 0)
 626         outfiles[i + 1] = outfiles[i];
 627       outfiles[0] = generated;
 628     }
 629   return err;
 630 }
 631
 632 /* Table of language-specific spec functions.  */
 633 const struct spec_function lang_specific_spec_functions[] =
 634 {
 635   { 0, 0 }
 636 };