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 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.
  21
  22 Java and all Java-based marks are trademarks or registered trademarks
  23 of Sun Microsystems, Inc. in the United States and other countries.
  24 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  25
  26 #include "config.h"
  27 #include "system.h"
  28 #include "gcc.h"
  29
  30 /* Name of spec file.  */
  31 #define SPEC_FILE "libgcj.spec"
  32
  33 /* This bit is set if we saw a `-xfoo' language specification.  */
  34 #define LANGSPEC        (1<<1)
  35 /* True if this arg is a parameter to the previous option-taking arg. */
  36 #define PARAM_ARG       (1<<2)
  37 /* True if this arg is a .java input file name. */
  38 #define JAVA_FILE_ARG   (1<<3)
  39 /* True if this arg is a .class input file name. */
  40 #define CLASS_FILE_ARG  (1<<4)
  41 /* True if this arg is a .zip or .jar input file name. */
  42 #define ZIP_FILE_ARG    (1<<5)
  43 /* True if this arg is @FILE - where FILE contains a list of filenames. */
  44 #define INDIRECT_FILE_ARG (1<<6)
  45 /* True if this arg is a resource file.  */
  46 #define RESOURCE_FILE_ARG (1<<7)
  47
  48 static char *find_spec_file     PARAMS ((const char *));
  49 static int verify_class_name    PARAMS ((const char *));
  50
  51 static const char *main_class_name = NULL;
  52 int lang_specific_extra_outfiles = 0;
  53
  54 /* True if we should add -shared-libgcc to the command-line.  */
  55 int shared_libgcc = 1;
  56
  57 static const char jvgenmain_spec[] =
  58   "jvgenmain %{D*} %b %{!pipe:%u.i} |\n\
  59    cc1 %{!pipe:%U.i} %1 \
  60                    %{!Q:-quiet} -dumpbase %b.c %{d*} %{m*} %{a*}\
  61                    %{g*} %{O*} \
  62                    %{v:-version} %{pg:-p} %{p}\
  63                    %{<fbounds-check} %{<fno-bounds-check}\
  64                    %{<fassume-compiled} %{<fno-assume-compiled}\
  65                    %{<fcompile-resource*}\
  66                    %{<femit-class-file} %{<femit-class-files} %{<fencoding*}\
  67                    %{<fuse-boehm-gc} %{<fhash-synchronization} %{<fjni}\
  68                    %{<findirect-dispatch} \
  69                    %{<fno-store-check} %{<foutput-class-dir}\
  70                    %{<fclasspath*} %{<fCLASSPATH*} %{<fbootclasspath*}\
  71                    %{<fuse-divide-subroutine} %{<fno-use-divide-subroutine}\
  72                    %{<fcheck-references} %{<fno-check-references}\
  73                    %{<ffilelist-file}\
  74                    %{f*} -fdollars-in-identifiers\
  75                    %{aux-info*}\
  76                    %{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\
  77                    %{S:%W{o*}%{!o*:-o %b.s}}%{!S:-o %{|!pipe:%g.s}} |\n\
  78               %{!S:as %a %Y -o %d%w%u%O %{!pipe:%g.s} %A\n }";
  79
  80 /* Return full path name of spec file if it is in DIR, or NULL if
  81    not.  */
  82 static char *
  83 find_spec_file (dir)
  84      const char *dir;
  85 {
  86   char *spec;
  87   int x;
  88   struct stat sb;
  89
  90   spec = (char *) xmalloc (strlen (dir) + sizeof (SPEC_FILE)
  91                            + sizeof ("-specs=") + 4);
  92   strcpy (spec, "-specs=");
  93   x = strlen (spec);
  94   strcat (spec, dir);
  95   strcat (spec, "/");
  96   strcat (spec, SPEC_FILE);
  97   if (! stat (spec + x, &sb))
  98     return spec;
  99   free (spec);
 100   return NULL;
 101 }
 102
 103 /* FIXME: these should come from lex.h.  */
 104 #define JAVA_START_CHAR_P(c) (c < 128 && (ISIDST (c) || c == '$'))
 105 #define JAVA_PART_CHAR_P(c) (c < 128                                          \
 106                              && (ISIDNUM (c)                                  \
 107                                  || c == '$'                                  \
 108                                  || (c >= 0x00 && c <= 0x08)                  \
 109                                  || (c >= 0x0e && c <= 0x1b)                  \
 110                                  || c == 0x7f))
 111
 112 /* Verify that NAME is a valid Java class name that might contain
 113    `main'.  Return 0 on failure.  */
 114 static int
 115 verify_class_name (name)
 116      const char *name;
 117 {
 118   /* FIXME: what encoding do we use for command-line arguments?  For
 119      now we assume plain ASCII, which of course is wrong.  */
 120   while (*name)
 121     {
 122       int ch = *name++;
 123       if (ch < 0 || ! JAVA_START_CHAR_P (ch))
 124         return 0;
 125       while (*name)
 126         {
 127           ch = *name++;
 128           if (ch < 0)
 129             return 0;
 130           /* We found a break between class names.  Next character
 131              must be an identifier start again.  */
 132           if (ch == '.')
 133             break;
 134           if (! JAVA_PART_CHAR_P (ch))
 135             return 0;
 136         }
 137     }
 138
 139   return 1;
 140 }
 141
 142 void
 143 lang_specific_driver (in_argc, in_argv, in_added_libraries)
 144      int *in_argc;
 145      const char *const **in_argv;
 146      int *in_added_libraries;
 147 {
 148   int i, j;
 149
 150   /* If non-zero, the user gave us the `-v' flag.  */
 151   int saw_verbose_flag = 0;
 152
 153   int saw_save_temps = 0;
 154
 155   /* This will be 0 if we encounter a situation where we should not
 156      link in libgcj.  */
 157   int library = 1;
 158
 159   /* This will be 1 if multiple input files (.class and/or .java)
 160      should be passed to a single jc1 invocation. */
 161   int combine_inputs = 0;
 162
 163   /* Index of last .java or .class argument. */
 164   int last_input_index;
 165
 166   /* Number of .java and .class source file arguments seen. */
 167   int java_files_count = 0;
 168   int class_files_count = 0;
 169   /* Number of .zip or .jar file arguments seen. */
 170   int zip_files_count = 0;
 171   /* Number of '@FILES' arguments seen. */
 172   int indirect_files_count = 0;
 173
 174   /* Name of file containing list of files to compile. */
 175   char *filelist_filename = 0;
 176
 177   FILE *filelist_file = 0;
 178
 179   /* The number of arguments being added to what's in argv, other than
 180      libraries.  */
 181   int added = 2;
 182
 183   /* Used to track options that take arguments, so we don't go wrapping
 184      those with -xc++/-xnone.  */
 185   const char *quote = NULL;
 186
 187   /* The new argument list will be contained in this.  */
 188   const char **arglist;
 189
 190   /* Non-zero if we saw a `-xfoo' language specification on the
 191      command line.  Used to avoid adding our own -xc++ if the user
 192      already gave a language for the file.  */
 193   int saw_speclang = 0;
 194
 195 #if 0
 196   /* "-lm" or "-lmath" if it appears on the command line.  */
 197   const char *saw_math ATTRIBUTE_UNUSED = 0;
 198
 199   /* "-lc" if it appears on the command line.  */
 200   const char *saw_libc ATTRIBUTE_UNUSED = 0;
 201
 202   /* "-lgcjgc" if it appears on the command line.  */
 203   const char *saw_gc ATTRIBUTE_UNUSED = 0;
 204
 205   /* Saw `-l' option for the thread library.  */
 206   const char *saw_threadlib ATTRIBUTE_UNUSED = 0;
 207
 208   /* Saw `-lgcj' on command line.  */
 209   int saw_libgcj ATTRIBUTE_UNUSED = 0;
 210 #endif
 211
 212   /* Saw -R, -C or -o options, respectively. */
 213   int saw_R = 0;
 214   int saw_C = 0;
 215   int saw_o = 0;
 216
 217   /* Saw some -O* or -g* option, respectively. */
 218   int saw_O = 0;
 219   int saw_g = 0;
 220
 221   /* Saw a `-D' option.  */
 222   int saw_D = 0;
 223
 224   /* An array used to flag each argument that needs a bit set for
 225      LANGSPEC, MATHLIB, WITHLIBC, or GCLIB.  */
 226   int *args;
 227
 228   /* The total number of arguments with the new stuff.  */
 229   int argc;
 230
 231   /* The argument list.  */
 232   const char *const *argv;
 233
 234   /* The number of libraries added in.  */
 235   int added_libraries;
 236
 237   /* The total number of arguments with the new stuff.  */
 238   int num_args = 1;
 239
 240   /* Non-zero if linking is supposed to happen.  */
 241   int will_link = 1;
 242
 243   /* Non-zero if we want to find the spec file.  */
 244   int want_spec_file = 1;
 245
 246   /* The argument we use to specify the spec file.  */
 247   char *spec_file = NULL;
 248
 249   argc = *in_argc;
 250   argv = *in_argv;
 251   added_libraries = *in_added_libraries;
 252
 253   args = (int *) xcalloc (argc, sizeof (int));
 254
 255   for (i = 1; i < argc; i++)
 256     {
 257       /* If the previous option took an argument, we swallow it here.  */
 258       if (quote)
 259         {
 260           quote = NULL;
 261           args[i] |= PARAM_ARG;
 262           continue;
 263         }
 264
 265       /* We don't do this anymore, since we don't get them with minus
 266          signs on them.  */
 267       if (argv[i][0] == '\0' || argv[i][1] == '\0')
 268         continue;
 269
 270       if (argv[i][0] == '-')
 271         {
 272           if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
 273                                || strcmp (argv[i], "-nodefaultlibs") == 0))
 274             {
 275               library = 0;
 276             }
 277           else if (strncmp (argv[i], "-fmain=", 7) == 0)
 278             {
 279               main_class_name = argv[i] + 7;
 280               added--;
 281             }
 282           else if (strcmp (argv[i], "-fhelp") == 0)
 283             want_spec_file = 0;
 284           else if (strcmp (argv[i], "-v") == 0)
 285             {
 286               saw_verbose_flag = 1;
 287               if (argc == 2)
 288                 {
 289                   /* If they only gave us `-v', don't try to link
 290                      in libgcj.  */
 291                   library = 0;
 292                 }
 293             }
 294           else if (strncmp (argv[i], "-x", 2) == 0)
 295             saw_speclang = 1;
 296           else if (strcmp (argv[i], "-C") == 0)
 297             {
 298               saw_C = 1;
 299               want_spec_file = 0;
 300               if (library != 0)
 301                 added -= 2;
 302               library = 0;
 303               will_link = 0;
 304             }
 305           else if (strcmp (argv[i], "-R") == 0)
 306             {
 307               saw_R = 1;
 308               quote = argv[i];
 309               want_spec_file = 0;
 310               if (library != 0)
 311                 added -= 2;
 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_R)
 385             {
 386               args[i] |= RESOURCE_FILE_ARG;
 387               last_input_index = i;
 388               added += 2;  /* for -xjava and -xnone */
 389             }
 390
 391           if (argv[i][0] == '@')
 392             {
 393               args[i] |= INDIRECT_FILE_ARG;
 394               indirect_files_count++;
 395               added += 2;  /* for -xjava and -xnone */
 396             }
 397
 398           len = strlen (argv[i]);
 399           if (len > 5 && strcmp (argv[i] + len - 5, ".java") == 0)
 400             {
 401               args[i] |= JAVA_FILE_ARG;
 402               java_files_count++;
 403               last_input_index = i;
 404             }
 405           if (len > 6 && strcmp (argv[i] + len - 6, ".class") == 0)
 406             {
 407               args[i] |= CLASS_FILE_ARG;
 408               class_files_count++;
 409               last_input_index = i;
 410             }
 411           if (len > 4
 412               && (strcmp (argv[i] + len - 4, ".zip") == 0
 413                   || strcmp (argv[i] + len - 4, ".jar") == 0))
 414             {
 415               args[i] |= ZIP_FILE_ARG;
 416               zip_files_count++;
 417               last_input_index = i;
 418             }
 419         }
 420     }
 421
 422   if (quote)
 423     fatal ("argument to `%s' missing\n", quote);
 424
 425   if (saw_D && ! main_class_name)
 426     fatal ("can't specify `-D' without `--main'\n");
 427
 428   if (main_class_name && ! verify_class_name (main_class_name))
 429     fatal ("`%s' is not a valid class name", main_class_name);
 430
 431   num_args = argc + added;
 432   if (saw_R)
 433     {
 434       if (! saw_o)
 435         fatal ("-R requires -o");
 436     }
 437   if (saw_C)
 438     {
 439       num_args += 3;
 440       if (class_files_count + zip_files_count > 0)
 441         {
 442           error ("warning: already-compiled .class files ignored with -C");
 443           num_args -= class_files_count + zip_files_count;
 444           class_files_count = 0;
 445           zip_files_count = 0;
 446         }
 447       num_args += 2;  /* For -o NONE. */
 448       if (saw_o)
 449         fatal ("cannot specify both -C and -o");
 450     }
 451   if ((saw_o && java_files_count + class_files_count + zip_files_count > 1)
 452       || (saw_C && java_files_count > 1)
 453       || (indirect_files_count > 0
 454           && java_files_count + class_files_count + zip_files_count > 0))
 455     combine_inputs = 1;
 456
 457   if (combine_inputs)
 458     {
 459       filelist_filename = make_temp_file ("jx");
 460       if (filelist_filename == NULL)
 461         fatal ("cannot create temporary file");
 462       record_temp_file (filelist_filename, ! saw_save_temps, 0);
 463       filelist_file = fopen (filelist_filename, "w");
 464       if (filelist_file == NULL)
 465         pfatal_with_name (filelist_filename);
 466       num_args -= java_files_count + class_files_count + zip_files_count;
 467       num_args += 2;  /* for the combined arg and "-xjava" */
 468     }
 469   /* If we know we don't have to do anything, bail now.  */
 470 #if 0
 471   if (! added && ! library && main_class_name == NULL && ! saw_C)
 472     {
 473       free (args);
 474       return;
 475     }
 476 #endif
 477
 478   if (main_class_name)
 479     {
 480       lang_specific_extra_outfiles++;
 481     }
 482   if (saw_g + saw_O == 0)
 483     num_args++;
 484   num_args++;
 485
 486   if (combine_inputs || indirect_files_count > 0)
 487     num_args += 1; /* for "-ffilelist-file" */
 488   if (combine_inputs && indirect_files_count > 0)
 489     fatal("using both @FILE with multiple files not implemented");
 490
 491   /* There's no point adding -shared-libgcc if we don't have a shared
 492      libgcc.  */
 493 #ifndef ENABLE_SHARED_LIBGCC
 494   shared_libgcc = 0;
 495 #endif
 496
 497   num_args += shared_libgcc;
 498
 499   arglist = (const char **) xmalloc ((num_args + 1) * sizeof (char *));
 500   j = 0;
 501
 502   for (i = 0; i < argc; i++, j++)
 503     {
 504       arglist[j] = argv[i];
 505
 506       if ((args[i] & PARAM_ARG) || i == 0)
 507         continue;
 508
 509       if ((args[i] & RESOURCE_FILE_ARG) != 0)
 510         {
 511           arglist[j++] = "-xjava";
 512           arglist[j++] = argv[i];
 513           arglist[j] = "-xnone";
 514         }
 515
 516       if (strcmp (argv[i], "-R") == 0)
 517         {
 518           arglist[j] = concat ("-fcompile-resource=",
 519                                *argv[i+1] == '/' ? "" : "/",
 520                                argv[i+1], NULL);
 521           i++;
 522           continue;
 523         }
 524
 525       if (strcmp (argv[i], "-classpath") == 0
 526           || strcmp (argv[i], "-bootclasspath") == 0
 527           || strcmp (argv[i], "-CLASSPATH") == 0)
 528         {
 529           arglist[j] = concat ("-f", argv[i]+1, "=", argv[i+1], NULL);
 530           i++;
 531           continue;
 532         }
 533
 534       if (strcmp (argv[i], "-d") == 0)
 535         {
 536           arglist[j] = concat ("-foutput-class-dir=", argv[i + 1], NULL);
 537           ++i;
 538           continue;
 539         }
 540
 541       if (spec_file == NULL && strncmp (argv[i], "-L", 2) == 0)
 542         spec_file = find_spec_file (argv[i] + 2);
 543
 544       if (strncmp (argv[i], "-fmain=", 7) == 0)
 545         {
 546           if (! will_link)
 547             fatal ("cannot specify `main' class when not linking");
 548           --j;
 549           continue;
 550         }
 551
 552       if ((args[i] & INDIRECT_FILE_ARG) != 0)
 553         {
 554           arglist[j++] = "-xjava";
 555           arglist[j++] = argv[i]+1;  /* Drop '@'. */
 556           arglist[j] = "-xnone";
 557         }
 558
 559       if ((args[i] & (CLASS_FILE_ARG|ZIP_FILE_ARG)) && saw_C)
 560         {
 561           --j;
 562           continue;
 563         }
 564
 565       if (combine_inputs
 566           && (args[i] & (CLASS_FILE_ARG|JAVA_FILE_ARG|ZIP_FILE_ARG)) != 0)
 567         {
 568           fputs (argv[i], filelist_file);
 569           fputc ('\n', filelist_file);
 570           --j;
 571           continue;
 572         }
 573   }
 574
 575   if (combine_inputs || indirect_files_count > 0)
 576     arglist[j++] = "-ffilelist-file";
 577
 578   if (combine_inputs)
 579     {
 580       if (fclose (filelist_file))
 581         pfatal_with_name (filelist_filename);
 582       arglist[j++] = "-xjava";
 583       arglist[j++] = filelist_filename;
 584     }
 585
 586   /* If we saw no -O or -g option, default to -g1, for javac compatibility. */
 587   if (saw_g + saw_O == 0)
 588     arglist[j++] = "-g1";
 589
 590   /* Read the specs file corresponding to libgcj.
 591      If we didn't find the spec file on the -L path, then we hope it
 592      is somewhere in the standard install areas.  */
 593   if (want_spec_file)
 594     arglist[j++] = spec_file == NULL ? "-specs=libgcj.spec" : spec_file;
 595
 596   if (saw_C)
 597     {
 598       arglist[j++] = "-fsyntax-only";
 599       arglist[j++] = "-femit-class-files";
 600       arglist[j++] = "-S";
 601       arglist[j++] = "-o";
 602       arglist[j++] = "NONE";
 603     }
 604
 605   if (shared_libgcc)
 606     arglist[j++] = "-shared-libgcc";
 607
 608   arglist[j] = NULL;
 609
 610   *in_argc = j;
 611   *in_argv = arglist;
 612   *in_added_libraries = added_libraries;
 613 }
 614
 615 int
 616 lang_specific_pre_link ()
 617 {
 618   int err;
 619   if (main_class_name == NULL)
 620     return 0;
 621   /* Append `main' to make the filename unique and allow
 622
 623         gcj --main=hello -save-temps hello.java
 624
 625      to work.  jvgenmain needs to strip this `main' to arrive at the correct
 626      class name.  Append dummy `.c' that can be stripped by set_input so %b
 627      is correct.  */
 628   set_input (concat (main_class_name, "main.c", NULL));
 629   err = do_spec (jvgenmain_spec);
 630   if (err == 0)
 631     {
 632       /* Shift the outfiles array so the generated main comes first.
 633          This is important when linking against (non-shared) libraries,
 634          since otherwise we risk (a) nothing getting linked or
 635          (b) 'main' getting picked up from a library. */
 636       int i = n_infiles;
 637       const char *generated = outfiles[i];
 638       while (--i >= 0)
 639         outfiles[i + 1] = outfiles[i];
 640       outfiles[0] = generated;
 641     }
 642   return err;
 643 }