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