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 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
  42 static char *find_spec_file     PARAMS ((const char *));
  43
  44 static const char *main_class_name = NULL;
  45 int lang_specific_extra_outfiles = 0;
  46
  47 /* Once we have the proper support in jc1 (and gcc.c) working,
  48    set COMBINE_INPUTS to one.  This enables combining multiple *.java
  49    and *.class input files to be passed to a single jc1 invocation. */
  50 #define COMBINE_INPUTS 0
  51
  52 const char jvgenmain_spec[] =
  53   "jvgenmain %{D*} %i %{!pipe:%umain.i} |\n\
  54    cc1 %{!pipe:%Umain.i} %1 \
  55                    %{!Q:-quiet} -dumpbase %b.c %{d*} %{m*} %{a*}\
  56                    %{g*} %{O*} \
  57                    %{v:-version} %{pg:-p} %{p}\
  58                    %{<fbounds-check} %{<fno-bounds-check}\
  59                    %{<fassume-compiled} %{<fno-assume-compiled}\
  60                    %{<femit-class-file} %{<femit-class-files}\
  61                    %{<fuse-boehm-gc} %{<fhash-synchronization} %{<fjni}\
  62                    %{<fclasspath*} %{<fCLASSPATH*} %{<foutput-class-dir}\
  63                    %{<fuse-divide-subroutine} %{<fno-use-divide-subroutine}\
  64                    %{f*}\
  65                    %{aux-info*}\
  66                    %{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\
  67                    %{S:%W{o*}%{!o*:-o %b.s}}%{!S:-o %{|!pipe:%Umain.s}} |\n\
  68               %{!S:as %a %Y -o %d%w%umain%O %{!pipe:%Umain.s} %A\n }";
  69
  70 /* Return full path name of spec file if it is in DIR, or NULL if
  71    not.  */
  72 static char *
  73 find_spec_file (dir)
  74      const char *dir;
  75 {
  76   char *spec;
  77   int x;
  78   struct stat sb;
  79
  80   spec = (char *) xmalloc (strlen (dir) + sizeof (SPEC_FILE)
  81                            + sizeof ("-specs=") + 4);
  82   strcpy (spec, "-specs=");
  83   x = strlen (spec);
  84   strcat (spec, dir);
  85   strcat (spec, "/");
  86   strcat (spec, SPEC_FILE);
  87   if (! stat (spec + x, &sb))
  88     return spec;
  89   free (spec);
  90   return NULL;
  91 }
  92
  93 void
  94 lang_specific_driver (in_argc, in_argv, in_added_libraries)
  95      int *in_argc;
  96      const char *const **in_argv;
  97      int *in_added_libraries;
  98 {
  99   int i, j;
 100
 101   /* If non-zero, the user gave us the `-v' flag.  */
 102   int saw_verbose_flag = 0;
 103
 104   /* This will be 0 if we encounter a situation where we should not
 105      link in libgcj.  */
 106   int library = 1;
 107
 108 #if COMBINE_INPUTS
 109   /* This will be 1 if multiple input files (.class and/or .java)
 110      should be passed to a single jc1 invocation. */
 111   int combine_inputs = 0;
 112
 113   /* Index of last .java or .class argument. */
 114   int last_input_index;
 115
 116   /* A buffer containing the concatenation of the inputs files
 117      (e.g. "foo.java&bar.class&baz.class"). if combine_inputs. */
 118   char* combined_inputs_buffer;
 119
 120   /* Next available location in combined_inputs_buffer. */
 121   int combined_inputs_pos;
 122
 123   /* Number of .java and .class source file arguments seen. */
 124   int java_files_count = 0;
 125   int class_files_count = 0;
 126
 127   /* Cumulative length of the  .java and .class source file names. */
 128   int java_files_length = 0;
 129   int class_files_length = 0;
 130 #endif
 131
 132   /* The number of arguments being added to what's in argv, other than
 133      libraries.  We use this to track the number of times we've inserted
 134      -xc++/-xnone.  */
 135   int added = 2;
 136
 137   /* Used to track options that take arguments, so we don't go wrapping
 138      those with -xc++/-xnone.  */
 139   const char *quote = NULL;
 140
 141   /* The new argument list will be contained in this.  */
 142   const char **arglist;
 143
 144   /* Non-zero if we saw a `-xfoo' language specification on the
 145      command line.  Used to avoid adding our own -xc++ if the user
 146      already gave a language for the file.  */
 147   int saw_speclang = 0;
 148
 149   /* "-lm" or "-lmath" if it appears on the command line.  */
 150   const char *saw_math ATTRIBUTE_UNUSED = 0;
 151
 152   /* "-lc" if it appears on the command line.  */
 153   const char *saw_libc ATTRIBUTE_UNUSED = 0;
 154
 155   /* "-lgcjgc" if it appears on the command line.  */
 156   const char *saw_gc ATTRIBUTE_UNUSED = 0;
 157
 158   /* Saw `-l' option for the thread library.  */
 159   const char *saw_threadlib ATTRIBUTE_UNUSED = 0;
 160
 161   /* Saw `-lgcj' on command line.  */
 162   int saw_libgcj ATTRIBUTE_UNUSED = 0;
 163
 164   /* Saw -C or -o option, respectively. */
 165   int saw_C = 0;
 166   int saw_o = 0;
 167
 168   /* Saw some -O* or -g* option, respectively. */
 169   int saw_O = 0;
 170   int saw_g = 0;
 171
 172   /* Saw a `-D' option.  */
 173   int saw_D = 0;
 174
 175   /* An array used to flag each argument that needs a bit set for
 176      LANGSPEC, MATHLIB, WITHLIBC, or GCLIB.  */
 177   int *args;
 178
 179   /* The total number of arguments with the new stuff.  */
 180   int argc;
 181
 182   /* The argument list.  */
 183   const char *const *argv;
 184
 185   /* The number of libraries added in.  */
 186   int added_libraries;
 187
 188   /* The total number of arguments with the new stuff.  */
 189   int num_args = 1;
 190
 191   /* Non-zero if linking is supposed to happen.  */
 192   int will_link = 1;
 193
 194   /* Non-zero if we want to find the spec file.  */
 195   int want_spec_file = 1;
 196
 197   /* The argument we use to specify the spec file.  */
 198   char *spec_file = NULL;
 199
 200   argc = *in_argc;
 201   argv = *in_argv;
 202   added_libraries = *in_added_libraries;
 203
 204   args = (int *) xcalloc (argc, sizeof (int));
 205
 206   for (i = 1; i < argc; i++)
 207     {
 208       /* If the previous option took an argument, we swallow it here.  */
 209       if (quote)
 210         {
 211           quote = NULL;
 212           args[i] |= PARAM_ARG;
 213           continue;
 214         }
 215
 216       /* We don't do this anymore, since we don't get them with minus
 217          signs on them.  */
 218       if (argv[i][0] == '\0' || argv[i][1] == '\0')
 219         continue;
 220
 221       if (argv[i][0] == '-')
 222         {
 223           if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
 224                                || strcmp (argv[i], "-nodefaultlibs") == 0))
 225             {
 226               library = 0;
 227             }
 228           else if (strncmp (argv[i], "-fmain=", 7) == 0)
 229             {
 230               main_class_name = argv[i] + 7;
 231               added--;
 232             }
 233           else if (strcmp (argv[i], "-fhelp") == 0)
 234             want_spec_file = 0;
 235           else if (strcmp (argv[i], "-v") == 0)
 236             {
 237               saw_verbose_flag = 1;
 238               if (argc == 2)
 239                 {
 240                   /* If they only gave us `-v', don't try to link
 241                      in libgcj.  */
 242                   library = 0;
 243                 }
 244             }
 245           else if (strncmp (argv[i], "-x", 2) == 0)
 246             saw_speclang = 1;
 247           else if (strcmp (argv[i], "-C") == 0)
 248             {
 249               saw_C = 1;
 250               want_spec_file = 0;
 251 #if COMBINE_INPUTS
 252               combine_inputs = 1;
 253 #endif
 254               if (library != 0)
 255                 added -= 2;
 256               library = 0;
 257               will_link = 0;
 258             }
 259           else if (argv[i][1] == 'D')
 260             saw_D = 1;
 261           else if (argv[i][1] == 'g')
 262             saw_g = 1;
 263           else if (argv[i][1] == 'O')
 264             saw_O = 1;
 265           else if (((argv[i][2] == '\0'
 266                      && (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
 267                     || strcmp (argv[i], "-Tdata") == 0))
 268             {
 269               if (strcmp (argv[i], "-o") == 0)
 270                 saw_o = 1;
 271               quote = argv[i];
 272             }
 273           else if (strcmp(argv[i], "-classpath") == 0
 274                    || strcmp(argv[i], "-CLASSPATH") == 0)
 275             {
 276               quote = argv[i];
 277               added -= 1;
 278             }
 279           else if (library != 0
 280                    && ((argv[i][2] == '\0'
 281                         && (char *) strchr ("cSEM", argv[i][1]) != NULL)
 282                        || strcmp (argv[i], "-MM") == 0))
 283             {
 284               /* Don't specify libraries if we won't link, since that would
 285                  cause a warning.  */
 286               library = 0;
 287               added -= 2;
 288
 289               /* Remember this so we can confirm -fmain option.  */
 290               will_link = 0;
 291             }
 292           else if (strcmp (argv[i], "-d") == 0)
 293             {
 294               /* `-d' option is for javac compatibility.  */
 295               quote = argv[i];
 296               added -= 1;
 297             }
 298           else if (strcmp (argv[i], "-fsyntax-only") == 0
 299                    || strcmp (argv[i], "--syntax-only") == 0)
 300             {
 301               want_spec_file = 0;
 302               library = 0;
 303               will_link = 0;
 304               continue;
 305             }
 306           else
 307             /* Pass other options through.  */
 308             continue;
 309         }
 310       else
 311         {
 312 #if COMBINE_INPUTS
 313           int len;
 314 #endif
 315
 316           if (saw_speclang)
 317             {
 318               saw_speclang = 0;
 319               continue;
 320             }
 321
 322 #if COMBINE_INPUTS
 323           len = strlen (argv[i]);
 324           if (len > 5 && strcmp (argv[i] + len - 5, ".java") == 0)
 325             {
 326               args[i] |= JAVA_FILE_ARG;
 327               java_files_count++;
 328               java_files_length += len;
 329               last_input_index = i;
 330             }
 331           if (len > 6 && strcmp (argv[i] + len - 6, ".class") == 0)
 332             {
 333               args[i] |= CLASS_FILE_ARG;
 334               class_files_count++;
 335               class_files_length += len;
 336               last_input_index = i;
 337             }
 338 #endif
 339         }
 340     }
 341
 342   if (quote)
 343     fatal ("argument to `%s' missing\n", quote);
 344
 345   if (saw_D && ! main_class_name)
 346     fatal ("can't specify `-D' without `--main'\n");
 347
 348   num_args = argc + added;
 349   if (saw_C)
 350     {
 351       num_args += 3;
 352 #if COMBINE_INPUTS
 353       class_files_length = 0;
 354       num_args -= class_files_count;
 355       num_args += 2;  /* For -o NONE. */
 356 #endif
 357       if (saw_o)
 358         fatal ("cannot specify both -C and -o");
 359     }
 360 #if COMBINE_INPUTS
 361   if (saw_o && java_files_count + (saw_C ? 0 : class_files_count) > 1)
 362     combine_inputs = 1;
 363
 364   if (combine_inputs)
 365     {
 366       int len = java_files_length + java_files_count - 1;
 367       num_args -= java_files_count;
 368       num_args++;  /* Add one for the combined arg. */
 369       if (class_files_length > 0)
 370         {
 371           len += class_files_length + class_files_count - 1;
 372           num_args -= class_files_count;
 373         }
 374       combined_inputs_buffer = (char*) xmalloc (len);
 375       combined_inputs_pos = 0;
 376     }
 377   /* If we know we don't have to do anything, bail now.  */
 378 #endif
 379 #if 0
 380   if (! added && ! library && main_class_name == NULL && ! saw_C)
 381     {
 382       free (args);
 383       return;
 384     }
 385 #endif
 386
 387   if (main_class_name)
 388     {
 389       lang_specific_extra_outfiles++;
 390     }
 391   if (saw_g + saw_O == 0)
 392     num_args++;
 393   num_args++;
 394
 395   arglist = (const char **) xmalloc ((num_args + 1) * sizeof (char *));
 396
 397   for (i = 0, j = 0; i < argc; i++, j++)
 398     {
 399       arglist[j] = argv[i];
 400
 401       if ((args[i] & PARAM_ARG) || i == 0)
 402         continue;
 403
 404       if (strcmp (argv[i], "-classpath") == 0
 405           || strcmp (argv[i], "-CLASSPATH") == 0)
 406         {
 407           char* patharg
 408             = (char*) xmalloc (strlen (argv[i]) + strlen (argv[i+1]) + 3);
 409           sprintf (patharg, "-f%s=%s", argv[i]+1, argv[i+1]);
 410           arglist[j] = patharg;
 411           i++;
 412           continue;
 413         }
 414
 415       if (strcmp (argv[i], "-d") == 0)
 416         {
 417           char *patharg = (char *) xmalloc (sizeof ("-foutput-class-dir=")
 418                                             + strlen (argv[i + 1]) + 1);
 419           sprintf (patharg, "-foutput-class-dir=%s", argv[i + 1]);
 420           arglist[j] = patharg;
 421           ++i;
 422           continue;
 423         }
 424
 425       if (spec_file == NULL && strncmp (argv[i], "-L", 2) == 0)
 426         spec_file = find_spec_file (argv[i] + 2);
 427
 428       if (strncmp (argv[i], "-fmain=", 7) == 0)
 429         {
 430           if (! will_link)
 431             fatal ("cannot specify `main' class when not linking");
 432           --j;
 433           continue;
 434         }
 435
 436       if ((args[i] & CLASS_FILE_ARG) && saw_C)
 437         {
 438           --j;
 439           continue;
 440         }
 441
 442 #if COMBINE_INPUTS
 443       if (combine_inputs && (args[i] & (CLASS_FILE_ARG|JAVA_FILE_ARG)) != 0)
 444         {
 445           if (combined_inputs_pos > 0)
 446             combined_inputs_buffer[combined_inputs_pos++] = '&';
 447           strcpy (&combined_inputs_buffer[combined_inputs_pos], argv[i]);
 448           combined_inputs_pos += strlen (argv[i]);
 449           --j;
 450           continue;
 451         }
 452 #endif
 453   }
 454
 455 #if COMBINE_INPUTS
 456   if (combine_inputs)
 457     {
 458       combined_inputs_buffer[combined_inputs_pos] = '\0';
 459 #if 0
 460       if (! saw_C)
 461 #endif
 462       arglist[j++] = combined_inputs_buffer;
 463     }
 464 #endif
 465
 466   /* If we saw no -O or -g option, default to -g1, for javac compatibility. */
 467   if (saw_g + saw_O == 0)
 468     arglist[j++] = "-g1";
 469
 470   /* Read the specs file corresponding to libgcj.
 471      If we didn't find the spec file on the -L path, then we hope it
 472      is somewhere in the standard install areas.  */
 473   if (want_spec_file)
 474     arglist[j++] = spec_file == NULL ? "-specs=libgcj.spec" : spec_file;
 475
 476   if (saw_C)
 477     {
 478       arglist[j++] = "-fsyntax-only";
 479       arglist[j++] = "-femit-class-files";
 480       arglist[j++] = "-S";
 481 #if COMBINE_INPUTS
 482       arglist[j++] = "-o";
 483       arglist[j++] = "NONE";
 484 #endif
 485     }
 486
 487   arglist[j] = NULL;
 488
 489   *in_argc = j;
 490   *in_argv = arglist;
 491   *in_added_libraries = added_libraries;
 492 }
 493
 494 int
 495 lang_specific_pre_link ()
 496 {
 497   if (main_class_name == NULL)
 498     return 0;
 499   input_filename = main_class_name;
 500   input_filename_length = strlen (main_class_name);
 501   return do_spec (jvgenmain_spec);
 502 }