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   expandargv (&argc, &argv);
 631
 632   saved_argv = (char **) xmalloc (argc * sizeof (char*));
 633   dlltool_arg_indices = (int *) xmalloc (argc * sizeof (int));
 634   driver_arg_indices = (int *) xmalloc (argc * sizeof (int));
 635   for (i = 0; i < argc; ++i)
 636     {
 637       size_t len = strlen (argv[i]);
 638       char *arg = (char *) xmalloc (len + 1);
 639       strcpy (arg, argv[i]);
 640       cmdline_len += len;
 641       saved_argv[i] = arg;
 642       dlltool_arg_indices[i] = 0;
 643       driver_arg_indices[i] = 1;
 644     }
 645   cmdline_len++;
 646
 647   /* We recognize dllwrap and dlltool options, and everything else is
 648      passed onto the language driver (eg., to GCC). We collect options
 649      to dlltool and driver in dlltool_args and driver_args.  */
 650
 651   opterr = 0;
 652   while ((c = getopt_long_only (argc, argv, "nkAqve:Uho:l:L:I:",
 653                                 long_options, (int *) 0)) != EOF)
 654     {
 655       int dlltool_arg;
 656       int driver_arg;
 657       int single_word_option_value_pair;
 658
 659       dlltool_arg = 0;
 660       driver_arg = 1;
 661       single_word_option_value_pair = 0;
 662
 663       if (c != '?')
 664         {
 665           /* We recognize this option, so it has to be either dllwrap or
 666              dlltool option. Do not pass to driver unless it's one of the
 667              generic options that are passed to all the tools (such as -v)
 668              which are dealt with later.  */
 669           driver_arg = 0;
 670         }
 671
 672       /* deal with generic and dllwrap options first.  */
 673       switch (c)
 674         {
 675         case 'h':
 676           usage (stdout, 0);
 677           break;
 678         case 'q':
 679           verbose = 0;
 680           break;
 681         case 'v':
 682           verbose = 1;
 683           break;
 684         case OPTION_VERSION:
 685           print_version (prog_name);
 686           break;
 687         case 'e':
 688           entry_point = optarg;
 689           break;
 690         case OPTION_IMAGE_BASE:
 691           image_base_str = optarg;
 692           break;
 693         case OPTION_DEF:
 694           def_file_name = optarg;
 695           def_file_seen = 1;
 696           delete_def_file = 0;
 697           break;
 698         case 'n':
 699           dontdeltemps = 1;
 700           dlltool_arg = 1;
 701           break;
 702         case 'o':
 703           dll_file_name = optarg;
 704           break;
 705         case 'I':
 706         case 'l':
 707         case 'L':
 708           driver_arg = 1;
 709           break;
 710         case OPTION_DLLNAME:
 711           dll_name = optarg;
 712           break;
 713         case OPTION_DRY_RUN:
 714           dry_run = 1;
 715           break;
 716         case OPTION_DRIVER_NAME:
 717           driver_name = optarg;
 718           break;
 719         case OPTION_DRIVER_FLAGS:
 720           driver_flags = optarg;
 721           break;
 722         case OPTION_DLLTOOL_NAME:
 723           dlltool_name = optarg;
 724           break;
 725         case OPTION_TARGET:
 726           target = optarg;
 727           break;
 728         case OPTION_MNO_CYGWIN:
 729           target = "i386-mingw32";
 730           break;
 731         case OPTION_BASE_FILE:
 732           base_file_name = optarg;
 733           delete_base_file = 0;
 734           break;
 735         case OPTION_OUTPUT_EXP:
 736           exp_file_name = optarg;
 737           delete_exp_file = 0;
 738           break;
 739         case OPTION_EXPORT_ALL_SYMS:
 740           export_all = 1;
 741           break;
 742         case OPTION_OUTPUT_LIB:
 743           output_lib_file_name = optarg;
 744           break;
 745         case '?':
 746           break;
 747         default:
 748           dlltool_arg = 1;
 749           break;
 750         }
 751
 752       /* Handle passing through --option=value case.  */
 753       if (optarg
 754           && saved_argv[optind-1][0] == '-'
 755           && saved_argv[optind-1][1] == '-'
 756           && strchr (saved_argv[optind-1], '='))
 757         single_word_option_value_pair = 1;
 758
 759       if (dlltool_arg)
 760         {
 761           dlltool_arg_indices[optind-1] = 1;
 762           if (optarg && ! single_word_option_value_pair)
 763             {
 764               dlltool_arg_indices[optind-2] = 1;
 765             }
 766         }
 767
 768       if (! driver_arg)
 769         {
 770           driver_arg_indices[optind-1] = 0;
 771           if (optarg && ! single_word_option_value_pair)
 772             {
 773               driver_arg_indices[optind-2] = 0;
 774             }
 775         }
 776     }
 777
 778   /* Sanity checks.  */
 779   if (! dll_name && ! dll_file_name)
 780     {
 781       warn (_("Must provide at least one of -o or --dllname options"));
 782       exit (1);
 783     }
 784   else if (! dll_name)
 785     {
 786       dll_name = xstrdup (mybasename (dll_file_name));
 787     }
 788   else if (! dll_file_name)
 789     {
 790       dll_file_name = xstrdup (dll_name);
 791     }
 792
 793   /* Deduce driver-name and dlltool-name from our own.  */
 794   if (driver_name == NULL)
 795     driver_name = deduce_name ("gcc");
 796
 797   if (dlltool_name == NULL)
 798     dlltool_name = deduce_name ("dlltool");
 799
 800   if (! def_file_seen)
 801     {
 802       char *fileprefix = choose_temp_base ();
 803
 804       def_file_name = (char *) xmalloc (strlen (fileprefix) + 5);
 805       sprintf (def_file_name, "%s.def",
 806                (dontdeltemps) ? mybasename (fileprefix) : fileprefix);
 807       delete_def_file = 1;
 808       free (fileprefix);
 809       delete_def_file = 1;
 810       warn (_("no export definition file provided.\n\
 811 Creating one, but that may not be what you want"));
 812     }
 813
 814   /* Set the target platform.  */
 815   if (strstr (target, "cygwin"))
 816     which_target = CYGWIN_TARGET;
 817   else if (strstr (target, "mingw"))
 818     which_target = MINGW_TARGET;
 819   else
 820     which_target = UNKNOWN_TARGET;
 821
 822   /* Re-create the command lines as a string, taking care to quote stuff.  */
 823   dlltool_cmdline = dyn_string_new (cmdline_len);
 824   if (verbose)
 825     dyn_string_append_cstr (dlltool_cmdline, " -v");
 826
 827   dyn_string_append_cstr (dlltool_cmdline, " --dllname ");
 828   dyn_string_append_cstr (dlltool_cmdline, dll_name);
 829
 830   for (i = 1; i < argc; ++i)
 831     {
 832       if (dlltool_arg_indices[i])
 833         {
 834           char *arg = saved_argv[i];
 835           int quote = (strchr (arg, ' ') || strchr (arg, '\t'));
 836           dyn_string_append_cstr (dlltool_cmdline,
 837                              (quote) ? " \"" : " ");
 838           dyn_string_append_cstr (dlltool_cmdline, arg);
 839           dyn_string_append_cstr (dlltool_cmdline,
 840                              (quote) ? "\"" : "");
 841         }
 842     }
 843
 844   driver_cmdline = dyn_string_new (cmdline_len);
 845   if (! driver_flags || strlen (driver_flags) == 0)
 846     {
 847       switch (which_target)
 848         {
 849         case CYGWIN_TARGET:
 850           driver_flags = cygwin_driver_flags;
 851           break;
 852
 853         case MINGW_TARGET:
 854           driver_flags = mingw32_driver_flags;
 855           break;
 856
 857         default:
 858           driver_flags = generic_driver_flags;
 859           break;
 860         }
 861     }
 862   dyn_string_append_cstr (driver_cmdline, driver_flags);
 863   dyn_string_append_cstr (driver_cmdline, " -o ");
 864   dyn_string_append_cstr (driver_cmdline, dll_file_name);
 865
 866   if (! entry_point || strlen (entry_point) == 0)
 867     {
 868       switch (which_target)
 869         {
 870         case CYGWIN_TARGET:
 871           entry_point = "__cygwin_dll_entry@12";
 872           break;
 873
 874         case MINGW_TARGET:
 875           entry_point = "_DllMainCRTStartup@12";
 876           break;
 877
 878         default:
 879           entry_point = "_DllMain@12";
 880           break;
 881         }
 882     }
 883   dyn_string_append_cstr (driver_cmdline, " -Wl,-e,");
 884   dyn_string_append_cstr (driver_cmdline, entry_point);
 885   dyn_string_append_cstr (dlltool_cmdline, " --exclude-symbol=");
 886   dyn_string_append_cstr (dlltool_cmdline,
 887                     (entry_point[0] == '_') ? entry_point+1 : entry_point);
 888
 889   if (! image_base_str || strlen (image_base_str) == 0)
 890     {
 891       char *tmpbuf = (char *) xmalloc (sizeof ("0x12345678") + 1);
 892       unsigned long hash = strhash (dll_file_name);
 893       sprintf (tmpbuf, "0x%.8lX", 0x60000000|((hash<<16)&0xFFC0000));
 894       image_base_str = tmpbuf;
 895     }
 896
 897   dyn_string_append_cstr (driver_cmdline, " -Wl,--image-base,");
 898   dyn_string_append_cstr (driver_cmdline, image_base_str);
 899
 900   if (verbose)
 901     {
 902       dyn_string_append_cstr (driver_cmdline, " -v");
 903     }
 904
 905   for (i = 1; i < argc; ++i)
 906     {
 907       if (driver_arg_indices[i])
 908         {
 909           char *arg = saved_argv[i];
 910           int quote = (strchr (arg, ' ') || strchr (arg, '\t'));
 911           dyn_string_append_cstr (driver_cmdline,
 912                              (quote) ? " \"" : " ");
 913           dyn_string_append_cstr (driver_cmdline, arg);
 914           dyn_string_append_cstr (driver_cmdline,
 915                              (quote) ? "\"" : "");
 916         }
 917     }
 918
 919   /* Step pre-1. If no --def <EXPORT_DEF> is specified,
 920      then create it and then pass it on.  */
 921
 922   if (! def_file_seen)
 923     {
 924       int i;
 925       dyn_string_t step_pre1;
 926
 927       step_pre1 = dyn_string_new (1024);
 928
 929       dyn_string_append_cstr (step_pre1, dlltool_cmdline->s);
 930       if (export_all)
 931         {
 932           dyn_string_append_cstr (step_pre1, " --export-all --exclude-symbol=");
 933           dyn_string_append_cstr (step_pre1,
 934           "_cygwin_dll_entry@12,DllMainCRTStartup@12,DllMain@12,DllEntryPoint@12");
 935         }
 936       dyn_string_append_cstr (step_pre1, " --output-def ");
 937       dyn_string_append_cstr (step_pre1, def_file_name);
 938
 939       for (i = 1; i < argc; ++i)
 940         {
 941           if (driver_arg_indices[i])
 942             {
 943               char *arg = saved_argv[i];
 944               size_t len = strlen (arg);
 945               if (len >= 2 && arg[len-2] == '.'
 946                   && (arg[len-1] == 'o' || arg[len-1] == 'a'))
 947                 {
 948                   int quote = (strchr (arg, ' ') || strchr (arg, '\t'));
 949                   dyn_string_append_cstr (step_pre1,
 950                                      (quote) ? " \"" : " ");
 951                   dyn_string_append_cstr (step_pre1, arg);
 952                   dyn_string_append_cstr (step_pre1,
 953                                      (quote) ? "\"" : "");
 954                 }
 955             }
 956         }
 957
 958       if (run (dlltool_name, step_pre1->s))
 959         cleanup_and_exit (1);
 960
 961       dyn_string_delete (step_pre1);
 962     }
 963
 964   dyn_string_append_cstr (dlltool_cmdline, " --def ");
 965   dyn_string_append_cstr (dlltool_cmdline, def_file_name);
 966
 967   if (verbose)
 968     {
 969       fprintf (stderr, _("DLLTOOL name    : %s\n"), dlltool_name);
 970       fprintf (stderr, _("DLLTOOL options : %s\n"), dlltool_cmdline->s);
 971       fprintf (stderr, _("DRIVER name     : %s\n"), driver_name);
 972       fprintf (stderr, _("DRIVER options  : %s\n"), driver_cmdline->s);
 973     }
 974
 975   /* Step 1. Call GCC/LD to create base relocation file. If using GCC, the
 976      driver command line will look like the following:
 977
 978         % gcc -Wl,--dll --Wl,--base-file,foo.base [rest of command line]
 979
 980      If the user does not specify a base name, create temporary one that
 981      is deleted at exit.  */
 982
 983   if (! base_file_name)
 984     {
 985       char *fileprefix = choose_temp_base ();
 986       base_file_name = (char *) xmalloc (strlen (fileprefix) + 6);
 987       sprintf (base_file_name, "%s.base",
 988                (dontdeltemps) ? mybasename (fileprefix) : fileprefix);
 989       delete_base_file = 1;
 990       free (fileprefix);
 991     }
 992
 993   {
 994     int quote;
 995
 996     dyn_string_t step1 = dyn_string_new (driver_cmdline->length
 997                                          + strlen (base_file_name)
 998                                          + 20);
 999     dyn_string_append_cstr (step1, "-Wl,--base-file,");
1000     quote = (strchr (base_file_name, ' ')
1001              || strchr (base_file_name, '\t'));
1002     dyn_string_append_cstr (step1,
1003                        (quote) ? "\"" : "");
1004     dyn_string_append_cstr (step1, base_file_name);
1005     dyn_string_append_cstr (step1,
1006                        (quote) ? "\"" : "");
1007     if (driver_cmdline->length)
1008       {
1009         dyn_string_append_cstr (step1, " ");
1010         dyn_string_append_cstr (step1, driver_cmdline->s);
1011       }
1012
1013     if (run (driver_name, step1->s))
1014       cleanup_and_exit (1);
1015
1016     dyn_string_delete (step1);
1017   }
1018
1019   /* Step 2. generate the exp file by running dlltool.
1020      dlltool command line will look like the following:
1021
1022         % dlltool -Wl,--dll --Wl,--base-file,foo.base [rest of command line]
1023
1024      If the user does not specify a base name, create temporary one that
1025      is deleted at exit.  */
1026
1027   if (! exp_file_name)
1028     {
1029       char *p = strrchr (dll_name, '.');
1030       size_t prefix_len = (p) ? (size_t) (p - dll_name) : strlen (dll_name);
1031
1032       exp_file_name = (char *) xmalloc (prefix_len + 4 + 1);
1033       strncpy (exp_file_name, dll_name, prefix_len);
1034       exp_file_name[prefix_len] = '\0';
1035       strcat (exp_file_name, ".exp");
1036       delete_exp_file = 1;
1037     }
1038
1039   {
1040     int quote;
1041
1042     dyn_string_t step2 = dyn_string_new (dlltool_cmdline->length
1043                                          + strlen (base_file_name)
1044                                          + strlen (exp_file_name)
1045                                          + 20);
1046
1047     dyn_string_append_cstr (step2, "--base-file ");
1048     quote = (strchr (base_file_name, ' ')
1049              || strchr (base_file_name, '\t'));
1050     dyn_string_append_cstr (step2,
1051                        (quote) ? "\"" : "");
1052     dyn_string_append_cstr (step2, base_file_name);
1053     dyn_string_append_cstr (step2,
1054                        (quote) ? "\" " : " ");
1055
1056     dyn_string_append_cstr (step2, "--output-exp ");
1057     quote = (strchr (exp_file_name, ' ')
1058              || strchr (exp_file_name, '\t'));
1059     dyn_string_append_cstr (step2,
1060                        (quote) ? "\"" : "");
1061     dyn_string_append_cstr (step2, exp_file_name);
1062     dyn_string_append_cstr (step2,
1063                        (quote) ? "\"" : "");
1064
1065     if (dlltool_cmdline->length)
1066       {
1067         dyn_string_append_cstr (step2, " ");
1068         dyn_string_append_cstr (step2, dlltool_cmdline->s);
1069       }
1070
1071     if (run (dlltool_name, step2->s))
1072       cleanup_and_exit (1);
1073
1074     dyn_string_delete (step2);
1075   }
1076
1077   /*
1078    * Step 3. Call GCC/LD to again, adding the exp file this time.
1079    * driver command line will look like the following:
1080    *
1081    *    % gcc -Wl,--dll --Wl,--base-file,foo.base foo.exp [rest ...]
1082    */
1083
1084   {
1085     int quote;
1086
1087     dyn_string_t step3 = dyn_string_new (driver_cmdline->length
1088                                          + strlen (exp_file_name)
1089                                          + strlen (base_file_name)
1090                                          + 20);
1091     dyn_string_append_cstr (step3, "-Wl,--base-file,");
1092     quote = (strchr (base_file_name, ' ')
1093              || strchr (base_file_name, '\t'));
1094     dyn_string_append_cstr (step3,
1095                        (quote) ? "\"" : "");
1096     dyn_string_append_cstr (step3, base_file_name);
1097     dyn_string_append_cstr (step3,
1098                        (quote) ? "\" " : " ");
1099
1100     quote = (strchr (exp_file_name, ' ')
1101              || strchr (exp_file_name, '\t'));
1102     dyn_string_append_cstr (step3,
1103                        (quote) ? "\"" : "");
1104     dyn_string_append_cstr (step3, exp_file_name);
1105     dyn_string_append_cstr (step3,
1106                        (quote) ? "\"" : "");
1107
1108     if (driver_cmdline->length)
1109       {
1110         dyn_string_append_cstr (step3, " ");
1111         dyn_string_append_cstr (step3, driver_cmdline->s);
1112       }
1113
1114     if (run (driver_name, step3->s))
1115       cleanup_and_exit (1);
1116
1117     dyn_string_delete (step3);
1118   }
1119
1120
1121   /*
1122    * Step 4. Run DLLTOOL again using the same command line.
1123    */
1124
1125   {
1126     int quote;
1127     dyn_string_t step4 = dyn_string_new (dlltool_cmdline->length
1128                                          + strlen (base_file_name)
1129                                          + strlen (exp_file_name)
1130                                          + 20);
1131
1132     dyn_string_append_cstr (step4, "--base-file ");
1133     quote = (strchr (base_file_name, ' ')
1134              || strchr (base_file_name, '\t'));
1135     dyn_string_append_cstr (step4,
1136                        (quote) ? "\"" : "");
1137     dyn_string_append_cstr (step4, base_file_name);
1138     dyn_string_append_cstr (step4,
1139                        (quote) ? "\" " : " ");
1140
1141     dyn_string_append_cstr (step4, "--output-exp ");
1142     quote = (strchr (exp_file_name, ' ')
1143              || strchr (exp_file_name, '\t'));
1144     dyn_string_append_cstr (step4,
1145                        (quote) ? "\"" : "");
1146     dyn_string_append_cstr (step4, exp_file_name);
1147     dyn_string_append_cstr (step4,
1148                        (quote) ? "\"" : "");
1149
1150     if (dlltool_cmdline->length)
1151       {
1152         dyn_string_append_cstr (step4, " ");
1153         dyn_string_append_cstr (step4, dlltool_cmdline->s);
1154       }
1155
1156     if (output_lib_file_name)
1157       {
1158         dyn_string_append_cstr (step4, " --output-lib ");
1159         dyn_string_append_cstr (step4, output_lib_file_name);
1160       }
1161
1162     if (run (dlltool_name, step4->s))
1163       cleanup_and_exit (1);
1164
1165     dyn_string_delete (step4);
1166   }
1167
1168
1169   /*
1170    * Step 5. Link it all together and be done with it.
1171    * driver command line will look like the following:
1172    *
1173    *    % gcc -Wl,--dll foo.exp [rest ...]
1174    *
1175    */
1176
1177   {
1178     int quote;
1179
1180     dyn_string_t step5 = dyn_string_new (driver_cmdline->length
1181                                          + strlen (exp_file_name)
1182                                          + 20);
1183     quote = (strchr (exp_file_name, ' ')
1184              || strchr (exp_file_name, '\t'));
1185     dyn_string_append_cstr (step5,
1186                        (quote) ? "\"" : "");
1187     dyn_string_append_cstr (step5, exp_file_name);
1188     dyn_string_append_cstr (step5,
1189                        (quote) ? "\"" : "");
1190
1191     if (driver_cmdline->length)
1192       {
1193         dyn_string_append_cstr (step5, " ");
1194         dyn_string_append_cstr (step5, driver_cmdline->s);
1195       }
1196
1197     if (run (driver_name, step5->s))
1198       cleanup_and_exit (1);
1199
1200     dyn_string_delete (step5);
1201   }
1202
1203   cleanup_and_exit (0);
1204
1205   return 0;
1206 }