binutils/dllwrap.c

   1 /* dllwrap.c -- wrapper for DLLTOOL and GCC to generate PE style DLLs
   2    Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
   3    Contributed by Mumit Khan (khan@xraylith.wisc.edu).
   4
   5    This file is part of GNU Binutils.
   6
   7    This program 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 of the License, or
  10    (at your option) any later version.
  11
  12    This program 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 this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 /* AIX requires this to be the first thing in the file.  */
  23 #ifndef __GNUC__
  24 # ifdef _AIX
  25  #pragma alloca
  26 #endif
  27 #endif
  28
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #include "bfd.h"
  34 #include "libiberty.h"
  35 #include "bucomm.h"
  36 #include "getopt.h"
  37 #include "dyn-string.h"
  38
  39 #include <time.h>
  40 #include <sys/stat.h>
  41 #include <stdarg.h>
  42
  43 #ifdef HAVE_SYS_WAIT_H
  44 #include <sys/wait.h>
  45 #else /* ! HAVE_SYS_WAIT_H */
  46 #if ! defined (_WIN32) || defined (__CYGWIN32__)
  47 #ifndef WIFEXITED
  48 #define WIFEXITED(w)    (((w)&0377) == 0)
  49 #endif
  50 #ifndef WIFSIGNALED
  51 #define WIFSIGNALED(w)  (((w)&0377) != 0177 && ((w)&~0377) == 0)
  52 #endif
  53 #ifndef WTERMSIG
  54 #define WTERMSIG(w)     ((w) & 0177)
  55 #endif
  56 #ifndef WEXITSTATUS
  57 #define WEXITSTATUS(w)  (((w) >> 8) & 0377)
  58 #endif
  59 #else /* defined (_WIN32) && ! defined (__CYGWIN32__) */
  60 #ifndef WIFEXITED
  61 #define WIFEXITED(w)    (((w) & 0xff) == 0)
  62 #endif
  63 #ifndef WIFSIGNALED
  64 #define WIFSIGNALED(w)  (((w) & 0xff) != 0 && ((w) & 0xff) != 0x7f)
  65 #endif
  66 #ifndef WTERMSIG
  67 #define WTERMSIG(w)     ((w) & 0x7f)
  68 #endif
  69 #ifndef WEXITSTATUS
  70 #define WEXITSTATUS(w)  (((w) & 0xff00) >> 8)
  71 #endif
  72 #endif /* defined (_WIN32) && ! defined (__CYGWIN32__) */
  73 #endif /* ! HAVE_SYS_WAIT_H */
  74
  75 static char *driver_name = NULL;
  76 static char *cygwin_driver_flags =
  77   "-Wl,--dll -nostartfiles";
  78 static char *mingw32_driver_flags = "-mdll";
  79 static char *generic_driver_flags = "-Wl,--dll";
  80
  81 static char *entry_point;
  82
  83 static char *dlltool_name = NULL;
  84
  85 static char *target = TARGET;
  86
  87 typedef enum {
  88   UNKNOWN_TARGET,
  89   CYGWIN_TARGET,
  90   MINGW_TARGET
  91 }
  92 target_type;
  93
  94 static target_type which_target = UNKNOWN_TARGET;
  95
  96 static int dontdeltemps = 0;
  97 static int dry_run = 0;
  98
  99 static char *prog_name;
 100
 101 static int verbose = 0;
 102
 103 static char *dll_file_name;
 104 static char *dll_name;
 105 static char *base_file_name;
 106 static char *exp_file_name;
 107 static char *def_file_name;
 108 static int delete_base_file = 1;
 109 static int delete_exp_file = 1;
 110 static int delete_def_file = 1;
 111
 112 static int run (const char *, char *);
 113 static char *mybasename (const char *);
 114 static int strhash (const char *);
 115 static void usage (FILE *, int);
 116 static void display (const char *, va_list) ATTRIBUTE_PRINTF(1,0);
 117 static void inform (const char *, ...) ATTRIBUTE_PRINTF_1;
 118 static void warn (const char *, ...) ATTRIBUTE_PRINTF_1;
 119 static char *look_for_prog (const char *, const char *, int);
 120 static char *deduce_name (const char *);
 121 static void delete_temp_files (void);
 122 static void cleanup_and_exit (int);
 123
 124 /**********************************************************************/
 125
 126 /* Please keep the following 4 routines in sync with dlltool.c:
 127      display ()
 128      inform ()
 129      look_for_prog ()
 130      deduce_name ()
 131    It's not worth the hassle to break these out since dllwrap will
 132    (hopefully) soon be retired in favor of `ld --shared.  */
 133
 134 static void
 135 display (const char * message, va_list args)
 136 {
 137   if (prog_name != NULL)
 138     fprintf (stderr, "%s: ", prog_name);
 139
 140   vfprintf (stderr, message, args);
 141   fputc ('\n', stderr);
 142 }
 143
 144
 145 static void
 146 inform VPARAMS ((const char *message, ...))
 147 {
 148   VA_OPEN (args, message);
 149   VA_FIXEDARG (args, const char *, message);
 150
 151   if (!verbose)
 152     return;
 153
 154   display (message, args);
 155
 156   VA_CLOSE (args);
 157 }
 158
 159 static void
 160 warn VPARAMS ((const char *format, ...))
 161 {
 162   VA_OPEN (args, format);
 163   VA_FIXEDARG (args, const char *, format);
 164
 165   display (format, args);
 166
 167   VA_CLOSE (args);
 168 }
 169
 170 /* Look for the program formed by concatenating PROG_NAME and the
 171    string running from PREFIX to END_PREFIX.  If the concatenated
 172    string contains a '/', try appending EXECUTABLE_SUFFIX if it is
 173    appropriate.  */
 174
 175 static char *
 176 look_for_prog (const char *prog_name, const char *prefix, int end_prefix)
 177 {
 178   struct stat s;
 179   char *cmd;
 180
 181   cmd = xmalloc (strlen (prefix)
 182                  + strlen (prog_name)
 183 #ifdef HAVE_EXECUTABLE_SUFFIX
 184                  + strlen (EXECUTABLE_SUFFIX)
 185 #endif
 186                  + 10);
 187   strcpy (cmd, prefix);
 188
 189   sprintf (cmd + end_prefix, "%s", prog_name);
 190
 191   if (strchr (cmd, '/') != NULL)
 192     {
 193       int found;
 194
 195       found = (stat (cmd, &s) == 0
 196 #ifdef HAVE_EXECUTABLE_SUFFIX
 197                || stat (strcat (cmd, EXECUTABLE_SUFFIX), &s) == 0
 198 #endif
 199                );
 200
 201       if (! found)
 202         {
 203           /* xgettext:c-format */
 204           inform (_("Tried file: %s"), cmd);
 205           free (cmd);
 206           return NULL;
 207         }
 208     }
 209
 210   /* xgettext:c-format */
 211   inform (_("Using file: %s"), cmd);
 212
 213   return cmd;
 214 }
 215
 216 /* Deduce the name of the program we are want to invoke.
 217    PROG_NAME is the basic name of the program we want to run,
 218    eg "as" or "ld".  The catch is that we might want actually
 219    run "i386-pe-as" or "ppc-pe-ld".
 220
 221    If argv[0] contains the full path, then try to find the program
 222    in the same place, with and then without a target-like prefix.
 223
 224    Given, argv[0] = /usr/local/bin/i586-cygwin32-dlltool,
 225    deduce_name("as") uses the following search order:
 226
 227      /usr/local/bin/i586-cygwin32-as
 228      /usr/local/bin/as
 229      as
 230
 231    If there's an EXECUTABLE_SUFFIX, it'll use that as well; for each
 232    name, it'll try without and then with EXECUTABLE_SUFFIX.
 233
 234    Given, argv[0] = i586-cygwin32-dlltool, it will not even try "as"
 235    as the fallback, but rather return i586-cygwin32-as.
 236
 237    Oh, and given, argv[0] = dlltool, it'll return "as".
 238
 239    Returns a dynamically allocated string.  */
 240
 241 static char *
 242 deduce_name (const char * name)
 243 {
 244   char *cmd;
 245   const char *dash;
 246   const char *slash;
 247   const char *cp;
 248
 249   dash = NULL;
 250   slash = NULL;
 251   for (cp = prog_name; *cp != '\0'; ++cp)
 252     {
 253       if (*cp == '-')
 254         dash = cp;
 255
 256       if (
 257 #if defined(__DJGPP__) || defined (__CYGWIN__) || defined(__WIN32__)
 258           *cp == ':' || *cp == '\\' ||
 259 #endif
 260           *cp == '/')
 261         {
 262           slash = cp;
 263           dash = NULL;
 264         }
 265     }
 266
 267   cmd = NULL;
 268
 269   if (dash != NULL)
 270     /* First, try looking for a prefixed NAME in the
 271        PROG_NAME directory, with the same prefix as PROG_NAME.  */
 272     cmd = look_for_prog (name, prog_name, dash - prog_name + 1);
 273
 274   if (slash != NULL && cmd == NULL)
 275     /* Next, try looking for a NAME in the same directory as
 276        that of this program.  */
 277     cmd = look_for_prog (name, prog_name, slash - prog_name + 1);
 278
 279   if (cmd == NULL)
 280     /* Just return NAME as is.  */
 281     cmd = xstrdup (name);
 282
 283   return cmd;
 284 }
 285
 286 static void
 287 delete_temp_files (void)
 288 {
 289   if (delete_base_file && base_file_name)
 290     {
 291       if (verbose)
 292         {
 293           if (dontdeltemps)
 294             warn (_("Keeping temporary base file %s"), base_file_name);
 295           else
 296             warn (_("Deleting temporary base file %s"), base_file_name);
 297         }
 298       if (! dontdeltemps)
 299         {
 300           unlink (base_file_name);
 301           free (base_file_name);
 302         }
 303     }
 304
 305   if (delete_exp_file && exp_file_name)
 306     {
 307       if (verbose)
 308         {
 309           if (dontdeltemps)
 310             warn (_("Keeping temporary exp file %s"), exp_file_name);
 311           else
 312             warn (_("Deleting temporary exp file %s"), exp_file_name);
 313         }
 314       if (! dontdeltemps)
 315         {
 316           unlink (exp_file_name);
 317           free (exp_file_name);
 318         }
 319     }
 320   if (delete_def_file && def_file_name)
 321     {
 322       if (verbose)
 323         {
 324           if (dontdeltemps)
 325             warn (_("Keeping temporary def file %s"), def_file_name);
 326           else
 327             warn (_("Deleting temporary def file %s"), def_file_name);
 328         }
 329       if (! dontdeltemps)
 330         {
 331           unlink (def_file_name);
 332           free (def_file_name);
 333         }
 334     }
 335 }
 336
 337 static void
 338 cleanup_and_exit (int status)
 339 {
 340   delete_temp_files ();
 341   exit (status);
 342 }
 343
 344 static int
 345 run (const char *what, char *args)
 346 {
 347   char *s;
 348   int pid, wait_status, retcode;
 349   int i;
 350   const char **argv;
 351   char *errmsg_fmt, *errmsg_arg;
 352   char *temp_base = choose_temp_base ();
 353   int in_quote;
 354   char sep;
 355
 356   if (verbose || dry_run)
 357     fprintf (stderr, "%s %s\n", what, args);
 358
 359   /* Count the args */
 360   i = 0;
 361   for (s = args; *s; s++)
 362     if (*s == ' ')
 363       i++;
 364   i++;
 365   argv = alloca (sizeof (char *) * (i + 3));
 366   i = 0;
 367   argv[i++] = what;
 368   s = args;
 369   while (1)
 370     {
 371       while (*s == ' ' && *s != 0)
 372         s++;
 373       if (*s == 0)
 374         break;
 375       in_quote = (*s == '\'' || *s == '"');
 376       sep = (in_quote) ? *s++ : ' ';
 377       argv[i++] = s;
 378       while (*s != sep && *s != 0)
 379         s++;
 380       if (*s == 0)
 381         break;
 382       *s++ = 0;
 383       if (in_quote)
 384         s++;
 385     }
 386   argv[i++] = NULL;
 387
 388   if (dry_run)
 389     return 0;
 390
 391   pid = pexecute (argv[0], (char * const *) argv, prog_name, temp_base,
 392                   &errmsg_fmt, &errmsg_arg, PEXECUTE_ONE | PEXECUTE_SEARCH);
 393
 394   if (pid == -1)
 395     {
 396       int errno_val = errno;
 397
 398       fprintf (stderr, "%s: ", prog_name);
 399       fprintf (stderr, errmsg_fmt, errmsg_arg);
 400       fprintf (stderr, ": %s\n", strerror (errno_val));
 401       return 1;
 402     }
 403
 404   retcode = 0;
 405   pid = pwait (pid, &wait_status, 0);
 406   if (pid == -1)
 407     {
 408       warn ("wait: %s", strerror (errno));
 409       retcode = 1;
 410     }
 411   else if (WIFSIGNALED (wait_status))
 412     {
 413       warn (_("subprocess got fatal signal %d"), WTERMSIG (wait_status));
 414       retcode = 1;
 415     }
 416   else if (WIFEXITED (wait_status))
 417     {
 418       if (WEXITSTATUS (wait_status) != 0)
 419         {
 420           warn (_("%s exited with status %d"), what, WEXITSTATUS (wait_status));
 421           retcode = 1;
 422         }
 423     }
 424   else
 425     retcode = 1;
 426
 427   return retcode;
 428 }
 429
 430 static char *
 431 mybasename (const char *name)
 432 {
 433   const char *base = name;
 434
 435   while (*name)
 436     {
 437       if (*name == '/' || *name == '\\')
 438         {
 439           base = name + 1;
 440         }
 441       ++name;
 442     }
 443   return (char *) base;
 444 }
 445
 446 static int
 447 strhash (const char *str)
 448 {
 449   const unsigned char *s;
 450   unsigned long hash;
 451   unsigned int c;
 452   unsigned int len;
 453
 454   hash = 0;
 455   len = 0;
 456   s = (const unsigned char *) str;
 457   while ((c = *s++) != '\0')
 458     {
 459       hash += c + (c << 17);
 460       hash ^= hash >> 2;
 461       ++len;
 462     }
 463   hash += len + (len << 17);
 464   hash ^= hash >> 2;
 465
 466   return hash;
 467 }
 468
 469 /**********************************************************************/
 470
 471 static void
 472 usage (FILE *file, int status)
 473 {
 474   fprintf (file, _("Usage %s <option(s)> <object-file(s)>\n"), prog_name);
 475   fprintf (file, _("  Generic options:\n"));
 476   fprintf (file, _("   --quiet, -q            Work quietly\n"));
 477   fprintf (file, _("   --verbose, -v          Verbose\n"));
 478   fprintf (file, _("   --version              Print dllwrap version\n"));
 479   fprintf (file, _("   --implib <outname>     Synonym for --output-lib\n"));
 480   fprintf (file, _("  Options for %s:\n"), prog_name);
 481   fprintf (file, _("   --driver-name <driver> Defaults to \"gcc\"\n"));
 482   fprintf (file, _("   --driver-flags <flags> Override default ld flags\n"));
 483   fprintf (file, _("   --dlltool-name <dlltool> Defaults to \"dlltool\"\n"));
 484   fprintf (file, _("   --entry <entry>        Specify alternate DLL entry point\n"));
 485   fprintf (file, _("   --image-base <base>    Specify image base address\n"));
 486   fprintf (file, _("   --target <machine>     i386-cygwin32 or i386-mingw32\n"));
 487   fprintf (file, _("   --dry-run              Show what needs to be run\n"));
 488   fprintf (file, _("   --mno-cygwin           Create Mingw DLL\n"));
 489   fprintf (file, _("  Options passed to DLLTOOL:\n"));
 490   fprintf (file, _("   --machine <machine>\n"));
 491   fprintf (file, _("   --output-exp <outname> Generate export file.\n"));
 492   fprintf (file, _("   --output-lib <outname> Generate input library.\n"));
 493   fprintf (file, _("   --add-indirect         Add dll indirects to export file.\n"));
 494   fprintf (file, _("   --dllname <name>       Name of input dll to put into output lib.\n"));
 495   fprintf (file, _("   --def <deffile>        Name input .def file\n"));
 496   fprintf (file, _("   --output-def <deffile> Name output .def file\n"));
 497   fprintf (file, _("   --export-all-symbols     Export all symbols to .def\n"));
 498   fprintf (file, _("   --no-export-all-symbols  Only export .drectve symbols\n"));
 499   fprintf (file, _("   --exclude-symbols <list> Exclude <list> from .def\n"));
 500   fprintf (file, _("   --no-default-excludes    Zap default exclude symbols\n"));
 501   fprintf (file, _("   --base-file <basefile> Read linker generated base file\n"));
 502   fprintf (file, _("   --no-idata4           Don't generate idata$4 section\n"));
 503   fprintf (file, _("   --no-idata5           Don't generate idata$5 section\n"));
 504   fprintf (file, _("   -U                     Add underscores to .lib\n"));
 505   fprintf (file, _("   -k                     Kill @<n> from exported names\n"));
 506   fprintf (file, _("   --add-stdcall-alias    Add aliases without @<n>\n"));
 507   fprintf (file, _("   --as <name>            Use <name> for assembler\n"));
 508   fprintf (file, _("   --nodelete             Keep temp files.\n"));
 509   fprintf (file, _("  Rest are passed unmodified to the language driver\n"));
 510   fprintf (file, "\n\n");
 511   exit (status);
 512 }
 513
 514 #define OPTION_START            149
 515
 516 /* GENERIC options.  */
 517 #define OPTION_QUIET            (OPTION_START + 1)
 518 #define OPTION_VERBOSE          (OPTION_QUIET + 1)
 519 #define OPTION_VERSION          (OPTION_VERBOSE + 1)
 520
 521 /* DLLWRAP options.  */
 522 #define OPTION_DRY_RUN          (OPTION_VERSION + 1)
 523 #define OPTION_DRIVER_NAME      (OPTION_DRY_RUN + 1)
 524 #define OPTION_DRIVER_FLAGS     (OPTION_DRIVER_NAME + 1)
 525 #define OPTION_DLLTOOL_NAME     (OPTION_DRIVER_FLAGS + 1)
 526 #define OPTION_ENTRY            (OPTION_DLLTOOL_NAME + 1)
 527 #define OPTION_IMAGE_BASE       (OPTION_ENTRY + 1)
 528 #define OPTION_TARGET           (OPTION_IMAGE_BASE + 1)
 529 #define OPTION_MNO_CYGWIN       (OPTION_TARGET + 1)
 530
 531 /* DLLTOOL options.  */
 532 #define OPTION_NODELETE         (OPTION_MNO_CYGWIN + 1)
 533 #define OPTION_DLLNAME          (OPTION_NODELETE + 1)
 534 #define OPTION_NO_IDATA4        (OPTION_DLLNAME + 1)
 535 #define OPTION_NO_IDATA5        (OPTION_NO_IDATA4 + 1)
 536 #define OPTION_OUTPUT_EXP       (OPTION_NO_IDATA5 + 1)
 537 #define OPTION_OUTPUT_DEF       (OPTION_OUTPUT_EXP + 1)
 538 #define OPTION_EXPORT_ALL_SYMS  (OPTION_OUTPUT_DEF + 1)
 539 #define OPTION_NO_EXPORT_ALL_SYMS (OPTION_EXPORT_ALL_SYMS + 1)
 540 #define OPTION_EXCLUDE_SYMS     (OPTION_NO_EXPORT_ALL_SYMS + 1)
 541 #define OPTION_NO_DEFAULT_EXCLUDES (OPTION_EXCLUDE_SYMS + 1)
 542 #define OPTION_OUTPUT_LIB       (OPTION_NO_DEFAULT_EXCLUDES + 1)
 543 #define OPTION_DEF              (OPTION_OUTPUT_LIB + 1)
 544 #define OPTION_ADD_UNDERSCORE   (OPTION_DEF + 1)
 545 #define OPTION_KILLAT           (OPTION_ADD_UNDERSCORE + 1)
 546 #define OPTION_HELP             (OPTION_KILLAT + 1)
 547 #define OPTION_MACHINE          (OPTION_HELP + 1)
 548 #define OPTION_ADD_INDIRECT     (OPTION_MACHINE + 1)
 549 #define OPTION_BASE_FILE        (OPTION_ADD_INDIRECT + 1)
 550 #define OPTION_AS               (OPTION_BASE_FILE + 1)
 551
 552 static const struct option long_options[] =
 553 {
 554   /* generic options.  */
 555   {"quiet", no_argument, NULL, 'q'},
 556   {"verbose", no_argument, NULL, 'v'},
 557   {"version", no_argument, NULL, OPTION_VERSION},
 558   {"implib", required_argument, NULL, OPTION_OUTPUT_LIB},
 559
 560   /* dllwrap options.  */
 561   {"dry-run", no_argument, NULL, OPTION_DRY_RUN},
 562   {"driver-name", required_argument, NULL, OPTION_DRIVER_NAME},
 563   {"driver-flags", required_argument, NULL, OPTION_DRIVER_FLAGS},
 564   {"dlltool-name", required_argument, NULL, OPTION_DLLTOOL_NAME},
 565   {"entry", required_argument, NULL, 'e'},
 566   {"image-base", required_argument, NULL, OPTION_IMAGE_BASE},
 567   {"target", required_argument, NULL, OPTION_TARGET},
 568
 569   /* dlltool options.  */
 570   {"no-delete", no_argument, NULL, 'n'},
 571   {"dllname", required_argument, NULL, OPTION_DLLNAME},
 572   {"no-idata4", no_argument, NULL, OPTION_NO_IDATA4},
 573   {"no-idata5", no_argument, NULL, OPTION_NO_IDATA5},
 574   {"output-exp", required_argument, NULL, OPTION_OUTPUT_EXP},
 575   {"output-def", required_argument, NULL, OPTION_OUTPUT_DEF},
 576   {"export-all-symbols", no_argument, NULL, OPTION_EXPORT_ALL_SYMS},
 577   {"no-export-all-symbols", no_argument, NULL, OPTION_NO_EXPORT_ALL_SYMS},
 578   {"exclude-symbols", required_argument, NULL, OPTION_EXCLUDE_SYMS},
 579   {"no-default-excludes", no_argument, NULL, OPTION_NO_DEFAULT_EXCLUDES},
 580   {"output-lib", required_argument, NULL, OPTION_OUTPUT_LIB},
 581   {"def", required_argument, NULL, OPTION_DEF},
 582   {"add-underscore", no_argument, NULL, 'U'},
 583   {"killat", no_argument, NULL, 'k'},
 584   {"add-stdcall-alias", no_argument, NULL, 'A'},
 585   {"help", no_argument, NULL, 'h'},
 586   {"machine", required_argument, NULL, OPTION_MACHINE},
 587   {"add-indirect", no_argument, NULL, OPTION_ADD_INDIRECT},
 588   {"base-file", required_argument, NULL, OPTION_BASE_FILE},
 589   {"as", required_argument, NULL, OPTION_AS},
 590   {0, 0, 0, 0}
 591 };
 592
 593 int main (int, char **);
 594
 595 int
 596 main (int argc, char **argv)
 597 {
 598   int c;
 599   int i;
 600
 601   char **saved_argv = 0;
 602   int cmdline_len = 0;
 603
 604   int export_all = 0;
 605
 606   int *dlltool_arg_indices;
 607   int *driver_arg_indices;
 608
 609   char *driver_flags = 0;
 610   char *output_lib_file_name = 0;
 611
 612   dyn_string_t dlltool_cmdline;
 613   dyn_string_t driver_cmdline;
 614
 615   int def_file_seen = 0;
 616
 617   char *image_base_str = 0;
 618
 619   prog_name = argv[0];
 620
 621 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
 622   setlocale (LC_MESSAGES, "");
 623 #endif
 624 #if defined (HAVE_SETLOCALE)
 625   setlocale (LC_CTYPE, "");
 626 #endif
 627   bindtextdomain (PACKAGE, LOCALEDIR);
 628   textdomain (PACKAGE);
 629
 630   saved_argv = (char **) xmalloc (argc * sizeof (char*));
 631   dlltool_arg_indices = (int *) xmalloc (argc * sizeof (int));
 632   driver_arg_indices = (int *) xmalloc (argc * sizeof (int));
 633   for (i = 0; i < argc; ++i)
 634     {
 635       size_t len = strlen (argv[i]);
 636       char *arg = (char *) xmalloc (len + 1);
 637       strcpy (arg, argv[i]);
 638       cmdline_len += len;
 639       saved_argv[i] = arg;
 640       dlltool_arg_indices[i] = 0;
 641       driver_arg_indices[i] = 1;
 642     }
 643   cmdline_len++;
 644
 645   /* We recognize dllwrap and dlltool options, and everything else is
 646      passed onto the language driver (eg., to GCC). We collect options
 647      to dlltool and driver in dlltool_args and driver_args.  */
 648
 649   opterr = 0;
 650   while ((c = getopt_long_only (argc, argv, "nkAqve:Uho:l:L:I:",
 651                                 long_options, (int *) 0)) != EOF)
 652     {
 653       int dlltool_arg;
 654       int driver_arg;
 655       int single_word_option_value_pair;
 656
 657       dlltool_arg = 0;
 658       driver_arg = 1;
 659       single_word_option_value_pair = 0;
 660
 661       if (c != '?')
 662         {
 663           /* We recognize this option, so it has to be either dllwrap or
 664              dlltool option. Do not pass to driver unless it's one of the
 665              generic options that are passed to all the tools (such as -v)
 666              which are dealt with later.  */
 667           driver_arg = 0;
 668         }
 669
 670       /* deal with generic and dllwrap options first.  */
 671       switch (c)
 672         {
 673         case 'h':
 674           usage (stdout, 0);
 675           break;
 676         case 'q':
 677           verbose = 0;
 678           break;
 679         case 'v':
 680           verbose = 1;
 681           break;
 682         case OPTION_VERSION:
 683           print_version (prog_name);
 684           break;
 685         case 'e':
 686           entry_point = optarg;
 687           break;
 688         case OPTION_IMAGE_BASE:
 689           image_base_str = optarg;
 690           break;
 691         case OPTION_DEF:
 692           def_file_name = optarg;
 693           def_file_seen = 1;
 694           delete_def_file = 0;
 695           break;
 696         case 'n':
 697           dontdeltemps = 1;
 698           dlltool_arg = 1;
 699           break;
 700         case 'o':
 701           dll_file_name = optarg;
 702           break;
 703         case 'I':
 704         case 'l':
 705         case 'L':
 706           driver_arg = 1;
 707           break;
 708         case OPTION_DLLNAME:
 709           dll_name = optarg;
 710           break;
 711         case OPTION_DRY_RUN:
 712           dry_run = 1;
 713           break;
 714         case OPTION_DRIVER_NAME:
 715           driver_name = optarg;
 716           break;
 717         case OPTION_DRIVER_FLAGS:
 718           driver_flags = optarg;
 719           break;
 720         case OPTION_DLLTOOL_NAME:
 721           dlltool_name = optarg;
 722           break;
 723         case OPTION_TARGET:
 724           target = optarg;
 725           break;
 726         case OPTION_MNO_CYGWIN:
 727           target = "i386-mingw32";
 728           break;
 729         case OPTION_BASE_FILE:
 730           base_file_name = optarg;
 731           delete_base_file = 0;
 732           break;
 733         case OPTION_OUTPUT_EXP:
 734           exp_file_name = optarg;
 735           delete_exp_file = 0;
 736           break;
 737         case OPTION_EXPORT_ALL_SYMS:
 738           export_all = 1;
 739           break;
 740         case OPTION_OUTPUT_LIB:
 741           output_lib_file_name = optarg;
 742           break;
 743         case '?':
 744           break;
 745         default:
 746           dlltool_arg = 1;
 747           break;
 748         }
 749
 750       /* Handle passing through --option=value case.  */
 751       if (optarg
 752           && saved_argv[optind-1][0] == '-'
 753           && saved_argv[optind-1][1] == '-'
 754           && strchr (saved_argv[optind-1], '='))
 755         single_word_option_value_pair = 1;
 756
 757       if (dlltool_arg)
 758         {
 759           dlltool_arg_indices[optind-1] = 1;
 760           if (optarg && ! single_word_option_value_pair)
 761             {
 762               dlltool_arg_indices[optind-2] = 1;
 763             }
 764         }
 765
 766       if (! driver_arg)
 767         {
 768           driver_arg_indices[optind-1] = 0;
 769           if (optarg && ! single_word_option_value_pair)
 770             {
 771               driver_arg_indices[optind-2] = 0;
 772             }
 773         }
 774     }
 775
 776   /* Sanity checks.  */
 777   if (! dll_name && ! dll_file_name)
 778     {
 779       warn (_("Must provide at least one of -o or --dllname options"));
 780       exit (1);
 781     }
 782   else if (! dll_name)
 783     {
 784       dll_name = xstrdup (mybasename (dll_file_name));
 785     }
 786   else if (! dll_file_name)
 787     {
 788       dll_file_name = xstrdup (dll_name);
 789     }
 790
 791   /* Deduce driver-name and dlltool-name from our own.  */
 792   if (driver_name == NULL)
 793     driver_name = deduce_name ("gcc");
 794
 795   if (dlltool_name == NULL)
 796     dlltool_name = deduce_name ("dlltool");
 797
 798   if (! def_file_seen)
 799     {
 800       char *fileprefix = choose_temp_base ();
 801
 802       def_file_name = (char *) xmalloc (strlen (fileprefix) + 5);
 803       sprintf (def_file_name, "%s.def",
 804                (dontdeltemps) ? mybasename (fileprefix) : fileprefix);
 805       delete_def_file = 1;
 806       free (fileprefix);
 807       delete_def_file = 1;
 808       warn (_("no export definition file provided.\n\
 809 Creating one, but that may not be what you want"));
 810     }
 811
 812   /* Set the target platform.  */
 813   if (strstr (target, "cygwin"))
 814     which_target = CYGWIN_TARGET;
 815   else if (strstr (target, "mingw"))
 816     which_target = MINGW_TARGET;
 817   else
 818     which_target = UNKNOWN_TARGET;
 819
 820   /* Re-create the command lines as a string, taking care to quote stuff.  */
 821   dlltool_cmdline = dyn_string_new (cmdline_len);
 822   if (verbose)
 823     dyn_string_append_cstr (dlltool_cmdline, " -v");
 824
 825   dyn_string_append_cstr (dlltool_cmdline, " --dllname ");
 826   dyn_string_append_cstr (dlltool_cmdline, dll_name);
 827
 828   for (i = 1; i < argc; ++i)
 829     {
 830       if (dlltool_arg_indices[i])
 831         {
 832           char *arg = saved_argv[i];
 833           int quote = (strchr (arg, ' ') || strchr (arg, '\t'));
 834           dyn_string_append_cstr (dlltool_cmdline,
 835                              (quote) ? " \"" : " ");
 836           dyn_string_append_cstr (dlltool_cmdline, arg);
 837           dyn_string_append_cstr (dlltool_cmdline,
 838                              (quote) ? "\"" : "");
 839         }
 840     }
 841
 842   driver_cmdline = dyn_string_new (cmdline_len);
 843   if (! driver_flags || strlen (driver_flags) == 0)
 844     {
 845       switch (which_target)
 846         {
 847         case CYGWIN_TARGET:
 848           driver_flags = cygwin_driver_flags;
 849           break;
 850
 851         case MINGW_TARGET:
 852           driver_flags = mingw32_driver_flags;
 853           break;
 854
 855         default:
 856           driver_flags = generic_driver_flags;
 857           break;
 858         }
 859     }
 860   dyn_string_append_cstr (driver_cmdline, driver_flags);
 861   dyn_string_append_cstr (driver_cmdline, " -o ");
 862   dyn_string_append_cstr (driver_cmdline, dll_file_name);
 863
 864   if (! entry_point || strlen (entry_point) == 0)
 865     {
 866       switch (which_target)
 867         {
 868         case CYGWIN_TARGET:
 869           entry_point = "__cygwin_dll_entry@12";
 870           break;
 871
 872         case MINGW_TARGET:
 873           entry_point = "_DllMainCRTStartup@12";
 874           break;
 875
 876         default:
 877           entry_point = "_DllMain@12";
 878           break;
 879         }
 880     }
 881   dyn_string_append_cstr (driver_cmdline, " -Wl,-e,");
 882   dyn_string_append_cstr (driver_cmdline, entry_point);
 883   dyn_string_append_cstr (dlltool_cmdline, " --exclude-symbol=");
 884   dyn_string_append_cstr (dlltool_cmdline,
 885                     (entry_point[0] == '_') ? entry_point+1 : entry_point);
 886
 887   if (! image_base_str || strlen (image_base_str) == 0)
 888     {
 889       char *tmpbuf = (char *) xmalloc (sizeof ("0x12345678") + 1);
 890       unsigned long hash = strhash (dll_file_name);
 891       sprintf (tmpbuf, "0x%.8lX", 0x60000000|((hash<<16)&0xFFC0000));
 892       image_base_str = tmpbuf;
 893     }
 894
 895   dyn_string_append_cstr (driver_cmdline, " -Wl,--image-base,");
 896   dyn_string_append_cstr (driver_cmdline, image_base_str);
 897
 898   if (verbose)
 899     {
 900       dyn_string_append_cstr (driver_cmdline, " -v");
 901     }
 902
 903   for (i = 1; i < argc; ++i)
 904     {
 905       if (driver_arg_indices[i])
 906         {
 907           char *arg = saved_argv[i];
 908           int quote = (strchr (arg, ' ') || strchr (arg, '\t'));
 909           dyn_string_append_cstr (driver_cmdline,
 910                              (quote) ? " \"" : " ");
 911           dyn_string_append_cstr (driver_cmdline, arg);
 912           dyn_string_append_cstr (driver_cmdline,
 913                              (quote) ? "\"" : "");
 914         }
 915     }
 916
 917   /* Step pre-1. If no --def <EXPORT_DEF> is specified,
 918      then create it and then pass it on.  */
 919
 920   if (! def_file_seen)
 921     {
 922       int i;
 923       dyn_string_t step_pre1;
 924
 925       step_pre1 = dyn_string_new (1024);
 926
 927       dyn_string_append_cstr (step_pre1, dlltool_cmdline->s);
 928       if (export_all)
 929         {
 930           dyn_string_append_cstr (step_pre1, " --export-all --exclude-symbol=");
 931           dyn_string_append_cstr (step_pre1,
 932           "_cygwin_dll_entry@12,DllMainCRTStartup@12,DllMain@12,DllEntryPoint@12");
 933         }
 934       dyn_string_append_cstr (step_pre1, " --output-def ");
 935       dyn_string_append_cstr (step_pre1, def_file_name);
 936
 937       for (i = 1; i < argc; ++i)
 938         {
 939           if (driver_arg_indices[i])
 940             {
 941               char *arg = saved_argv[i];
 942               size_t len = strlen (arg);
 943               if (len >= 2 && arg[len-2] == '.'
 944                   && (arg[len-1] == 'o' || arg[len-1] == 'a'))
 945                 {
 946                   int quote = (strchr (arg, ' ') || strchr (arg, '\t'));
 947                   dyn_string_append_cstr (step_pre1,
 948                                      (quote) ? " \"" : " ");
 949                   dyn_string_append_cstr (step_pre1, arg);
 950                   dyn_string_append_cstr (step_pre1,
 951                                      (quote) ? "\"" : "");
 952                 }
 953             }
 954         }
 955
 956       if (run (dlltool_name, step_pre1->s))
 957         cleanup_and_exit (1);
 958
 959       dyn_string_delete (step_pre1);
 960     }
 961
 962   dyn_string_append_cstr (dlltool_cmdline, " --def ");
 963   dyn_string_append_cstr (dlltool_cmdline, def_file_name);
 964
 965   if (verbose)
 966     {
 967       fprintf (stderr, _("DLLTOOL name    : %s\n"), dlltool_name);
 968       fprintf (stderr, _("DLLTOOL options : %s\n"), dlltool_cmdline->s);
 969       fprintf (stderr, _("DRIVER name     : %s\n"), driver_name);
 970       fprintf (stderr, _("DRIVER options  : %s\n"), driver_cmdline->s);
 971     }
 972
 973   /* Step 1. Call GCC/LD to create base relocation file. If using GCC, the
 974      driver command line will look like the following:
 975
 976         % gcc -Wl,--dll --Wl,--base-file,foo.base [rest of command line]
 977
 978      If the user does not specify a base name, create temporary one that
 979      is deleted at exit.  */
 980
 981   if (! base_file_name)
 982     {
 983       char *fileprefix = choose_temp_base ();
 984       base_file_name = (char *) xmalloc (strlen (fileprefix) + 6);
 985       sprintf (base_file_name, "%s.base",
 986                (dontdeltemps) ? mybasename (fileprefix) : fileprefix);
 987       delete_base_file = 1;
 988       free (fileprefix);
 989     }
 990
 991   {
 992     int quote;
 993
 994     dyn_string_t step1 = dyn_string_new (driver_cmdline->length
 995                                          + strlen (base_file_name)
 996                                          + 20);
 997     dyn_string_append_cstr (step1, "-Wl,--base-file,");
 998     quote = (strchr (base_file_name, ' ')
 999              || strchr (base_file_name, '\t'));
1000     dyn_string_append_cstr (step1,
1001                        (quote) ? "\"" : "");
1002     dyn_string_append_cstr (step1, base_file_name);
1003     dyn_string_append_cstr (step1,
1004                        (quote) ? "\"" : "");
1005     if (driver_cmdline->length)
1006       {
1007         dyn_string_append_cstr (step1, " ");
1008         dyn_string_append_cstr (step1, driver_cmdline->s);
1009       }
1010
1011     if (run (driver_name, step1->s))
1012       cleanup_and_exit (1);
1013
1014     dyn_string_delete (step1);
1015   }
1016
1017   /* Step 2. generate the exp file by running dlltool.
1018      dlltool command line will look like the following:
1019
1020         % dlltool -Wl,--dll --Wl,--base-file,foo.base [rest of command line]
1021
1022      If the user does not specify a base name, create temporary one that
1023      is deleted at exit.  */
1024
1025   if (! exp_file_name)
1026     {
1027       char *p = strrchr (dll_name, '.');
1028       size_t prefix_len = (p) ? (size_t) (p - dll_name) : strlen (dll_name);
1029
1030       exp_file_name = (char *) xmalloc (prefix_len + 4 + 1);
1031       strncpy (exp_file_name, dll_name, prefix_len);
1032       exp_file_name[prefix_len] = '\0';
1033       strcat (exp_file_name, ".exp");
1034       delete_exp_file = 1;
1035     }
1036
1037   {
1038     int quote;
1039
1040     dyn_string_t step2 = dyn_string_new (dlltool_cmdline->length
1041                                          + strlen (base_file_name)
1042                                          + strlen (exp_file_name)
1043                                          + 20);
1044
1045     dyn_string_append_cstr (step2, "--base-file ");
1046     quote = (strchr (base_file_name, ' ')
1047              || strchr (base_file_name, '\t'));
1048     dyn_string_append_cstr (step2,
1049                        (quote) ? "\"" : "");
1050     dyn_string_append_cstr (step2, base_file_name);
1051     dyn_string_append_cstr (step2,
1052                        (quote) ? "\" " : " ");
1053
1054     dyn_string_append_cstr (step2, "--output-exp ");
1055     quote = (strchr (exp_file_name, ' ')
1056              || strchr (exp_file_name, '\t'));
1057     dyn_string_append_cstr (step2,
1058                        (quote) ? "\"" : "");
1059     dyn_string_append_cstr (step2, exp_file_name);
1060     dyn_string_append_cstr (step2,
1061                        (quote) ? "\"" : "");
1062
1063     if (dlltool_cmdline->length)
1064       {
1065         dyn_string_append_cstr (step2, " ");
1066         dyn_string_append_cstr (step2, dlltool_cmdline->s);
1067       }
1068
1069     if (run (dlltool_name, step2->s))
1070       cleanup_and_exit (1);
1071
1072     dyn_string_delete (step2);
1073   }
1074
1075   /*
1076    * Step 3. Call GCC/LD to again, adding the exp file this time.
1077    * driver command line will look like the following:
1078    *
1079    *    % gcc -Wl,--dll --Wl,--base-file,foo.base foo.exp [rest ...]
1080    */
1081
1082   {
1083     int quote;
1084
1085     dyn_string_t step3 = dyn_string_new (driver_cmdline->length
1086                                          + strlen (exp_file_name)
1087                                          + strlen (base_file_name)
1088                                          + 20);
1089     dyn_string_append_cstr (step3, "-Wl,--base-file,");
1090     quote = (strchr (base_file_name, ' ')
1091              || strchr (base_file_name, '\t'));
1092     dyn_string_append_cstr (step3,
1093                        (quote) ? "\"" : "");
1094     dyn_string_append_cstr (step3, base_file_name);
1095     dyn_string_append_cstr (step3,
1096                        (quote) ? "\" " : " ");
1097
1098     quote = (strchr (exp_file_name, ' ')
1099              || strchr (exp_file_name, '\t'));
1100     dyn_string_append_cstr (step3,
1101                        (quote) ? "\"" : "");
1102     dyn_string_append_cstr (step3, exp_file_name);
1103     dyn_string_append_cstr (step3,
1104                        (quote) ? "\"" : "");
1105
1106     if (driver_cmdline->length)
1107       {
1108         dyn_string_append_cstr (step3, " ");
1109         dyn_string_append_cstr (step3, driver_cmdline->s);
1110       }
1111
1112     if (run (driver_name, step3->s))
1113       cleanup_and_exit (1);
1114
1115     dyn_string_delete (step3);
1116   }
1117
1118
1119   /*
1120    * Step 4. Run DLLTOOL again using the same command line.
1121    */
1122
1123   {
1124     int quote;
1125     dyn_string_t step4 = dyn_string_new (dlltool_cmdline->length
1126                                          + strlen (base_file_name)
1127                                          + strlen (exp_file_name)
1128                                          + 20);
1129
1130     dyn_string_append_cstr (step4, "--base-file ");
1131     quote = (strchr (base_file_name, ' ')
1132              || strchr (base_file_name, '\t'));
1133     dyn_string_append_cstr (step4,
1134                        (quote) ? "\"" : "");
1135     dyn_string_append_cstr (step4, base_file_name);
1136     dyn_string_append_cstr (step4,
1137                        (quote) ? "\" " : " ");
1138
1139     dyn_string_append_cstr (step4, "--output-exp ");
1140     quote = (strchr (exp_file_name, ' ')
1141              || strchr (exp_file_name, '\t'));
1142     dyn_string_append_cstr (step4,
1143                        (quote) ? "\"" : "");
1144     dyn_string_append_cstr (step4, exp_file_name);
1145     dyn_string_append_cstr (step4,
1146                        (quote) ? "\"" : "");
1147
1148     if (dlltool_cmdline->length)
1149       {
1150         dyn_string_append_cstr (step4, " ");
1151         dyn_string_append_cstr (step4, dlltool_cmdline->s);
1152       }
1153
1154     if (output_lib_file_name)
1155       {
1156         dyn_string_append_cstr (step4, " --output-lib ");
1157         dyn_string_append_cstr (step4, output_lib_file_name);
1158       }
1159
1160     if (run (dlltool_name, step4->s))
1161       cleanup_and_exit (1);
1162
1163     dyn_string_delete (step4);
1164   }
1165
1166
1167   /*
1168    * Step 5. Link it all together and be done with it.
1169    * driver command line will look like the following:
1170    *
1171    *    % gcc -Wl,--dll foo.exp [rest ...]
1172    *
1173    */
1174
1175   {
1176     int quote;
1177
1178     dyn_string_t step5 = dyn_string_new (driver_cmdline->length
1179                                          + strlen (exp_file_name)
1180                                          + 20);
1181     quote = (strchr (exp_file_name, ' ')
1182              || strchr (exp_file_name, '\t'));
1183     dyn_string_append_cstr (step5,
1184                        (quote) ? "\"" : "");
1185     dyn_string_append_cstr (step5, exp_file_name);
1186     dyn_string_append_cstr (step5,
1187                        (quote) ? "\"" : "");
1188
1189     if (driver_cmdline->length)
1190       {
1191         dyn_string_append_cstr (step5, " ");
1192         dyn_string_append_cstr (step5, driver_cmdline->s);
1193       }
1194
1195     if (run (driver_name, step5->s))
1196       cleanup_and_exit (1);
1197
1198     dyn_string_delete (step5);
1199   }
1200
1201   cleanup_and_exit (0);
1202
1203   return 0;
1204 }