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/* VMS linker wrapper.

   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2007

   Free Software Foundation, Inc.

   Contributed by Douglas B. Rupp (rupp@gnat.com).

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3, or (at your option)

any later version.

GCC is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with GCC; see the file COPYING3.  If not see

<http://www.gnu.org/licenses/>.  */

/* This program is a wrapper around the VMS linker.

   It translates Unix style command line options into corresponding

   VMS style qualifiers and then spawns the VMS linker.  */

#include "config.h"

#include "system.h"

#include "coretypes.h"

#include "tm.h"

typedef struct dsc {unsigned short len, mbz; char *adr; } Descr;

#undef PATH_SEPARATOR

#undef PATH_SEPARATOR_STR

#define PATH_SEPARATOR ','

#define PATH_SEPARATOR_STR ","

/* Local variable declarations.  */

/* File specification for vms-dwarf2.o.  */

static char *vmsdwarf2spec = 0;

/* File specification for vms-dwarf2eh.o.  */

static char *vmsdwarf2ehspec = 0;

/* verbose = 1 if -v passed.  */

static int verbose = 0;

/* save_temps = 1 if -save-temps passed.  */

static int save_temps = 0;

/* By default don't generate executable file if there are errors

   in the link. Override with --noinhibit-exec.  */

static int inhibit_exec = 1;

/* debug = 1 if -g passed.  */

static int debug = 0;

/* By default prefer to link with shareable image libraries.

   Override with -static.  */

static int staticp = 0;

/* By default generate an executable, not a shareable image library.

   Override with -shared.  */

static int share = 0;

/* Remember if IDENTIFICATION given on command line.  */

static int ident = 0;

/* Keep track of arg translations.  */

static int link_arg_max = -1;

static const char **link_args = 0;

static int link_arg_index = -1;

/* Keep track of filenames */

static char optfilefullname [267];

static char *sharefilename = 0;

static char *exefilename = 0;

/* System search dir list. Leave blank since link handles this

   internally.  */

static char *system_search_dirs = "";

/* Search dir list passed on command line (with -L).  */

static char *search_dirs;

/* Local function declarations.  */

/* Add STR to the list of arguments to pass to the linker. Expand the list as

   necessary to accommodate.  */

static void addarg (const char *);

/* Check to see if NAME is a regular file, i.e. not a directory */

static int is_regular_file (char *);

/* Translate a Unix syntax file specification FILESPEC into VMS syntax.

   If indicators of VMS syntax found, return input string.  */

static char *to_host_file_spec (char *);

/* Locate the library named LIB_NAME in the set of paths PATH_VAL.  */

static char *locate_lib (char *, char *);

/* Given a library name NAME, i.e. foo,  Look for libfoo.lib and then

   libfoo.a in the set of directories we are allowed to search in.  */

static const char *expand_lib (char *);

/* Preprocess the number of args P_ARGC in ARGV.

   Look for special flags, etc. that must be handled first.  */

static void preprocess_args (int *, char **);

/* Preprocess the number of args P_ARGC in ARGV.  Look for

   special flags, etc. that must be handled for the VMS linker.  */

static void process_args (int *, char **);

/* Action routine called by decc$to_vms. NAME is a file name or

   directory name. TYPE is unused.  */

static int translate_unix (char *, int);

int main (int, char **);

static void

addarg (const char *str)

{

  int i;

  if (++link_arg_index >= link_arg_max)

    {

      const char **new_link_args

        = (const char **) xcalloc (link_arg_max + 1000, sizeof (char *));

      for (i = 0; i <= link_arg_max; i++)

        new_link_args [i] = link_args [i];

      if (link_args)

        free (link_args);

      link_arg_max += 1000;

      link_args = new_link_args;

    }

  link_args [link_arg_index] = str;

}

static char *

locate_lib (char *lib_name, char *path_val)

{

  int lib_len = strlen (lib_name);

  char *eptr, *sptr;

  for (sptr = path_val; *sptr; sptr = eptr)

    {

      char *buf, *ptr;

      while (*sptr == PATH_SEPARATOR)

        sptr ++;

      eptr = strchr (sptr, PATH_SEPARATOR);

      if (eptr == 0)

        eptr = strchr (sptr, 0);

      buf = alloca ((eptr-sptr) + lib_len + 4 + 2);

      strncpy (buf, sptr, eptr-sptr);

      buf [eptr-sptr] = 0;

      strcat (buf, "/");

      strcat (buf, lib_name);

      ptr = strchr (buf, 0);

      if (debug || staticp)

        {

          /* For debug or static links, look for shareable image libraries

             last.  */

          strcpy (ptr, ".a");

          if (is_regular_file (buf))

            return xstrdup (to_host_file_spec (buf));

          strcpy (ptr, ".olb");

          if (is_regular_file (buf))

            return xstrdup (to_host_file_spec (buf));

          strcpy (ptr, ".exe");

          if (is_regular_file (buf))

            return xstrdup (to_host_file_spec (buf));

        }

      else

        {

          /* Otherwise look for shareable image libraries first.  */

          strcpy (ptr, ".exe");

          if (is_regular_file (buf))

            return xstrdup (to_host_file_spec (buf));

          strcpy (ptr, ".a");

          if (is_regular_file (buf))

            return xstrdup (to_host_file_spec (buf));

          strcpy (ptr, ".olb");

          if (is_regular_file (buf))

            return xstrdup (to_host_file_spec (buf));

        }

    }

  return 0;

}

static const char *

expand_lib (char *name)

{

  char *lib, *lib_path;

  if (strcmp (name, "c") == 0)

    /* IEEE VAX C compatible library for non-prefixed (e.g. no DECC$)

       C RTL functions.  */

    return "sys$library:vaxcrtltx.olb";

  else if (strcmp (name, "m") == 0)

    /* No separate library for math functions */

    return "";

  else

    {

      lib = xmalloc (strlen (name) + 14);

      strcpy (lib, "lib");

      strcat (lib, name);

      lib_path = locate_lib (lib, search_dirs);

      if (lib_path)

        return lib_path;

    }

  fprintf (stderr,

           "Couldn't locate library: lib%s.exe, lib%s.a or lib%s.olb\n",

           name, name, name);

  exit (1);

}

static int

is_regular_file (char *name)

{

  int ret;

  struct stat statbuf;

  ret = stat (name, &statbuf);

  return !ret && S_ISREG (statbuf.st_mode);

}

static void

preprocess_args (int *p_argc, char **argv)

{

  int i;

  for (i = 1; i < *p_argc; i++)

    if (strlen (argv[i]) >= 6 && strncmp (argv[i], "-shared", 7) == 0)

      share = 1;

  for (i = 1; i < *p_argc; i++)

    if (strcmp (argv[i], "-o") == 0)

      {

        char *buff, *ptr;

        int out_len;

        int len;

        i++;

        ptr = to_host_file_spec (argv[i]);

        exefilename = xstrdup (ptr);

        out_len = strlen (ptr);

        buff = xmalloc (out_len + 18);

        if (share)

          strcpy (buff, "/share=");

        else

          strcpy (buff, "/exe=");

        strcat (buff, ptr);

        addarg (buff);

        if (share)

          {

            sharefilename = xmalloc (out_len+5);

            if (ptr == strchr (argv[i], ']'))

              strcpy (sharefilename, ++ptr);

            else if (ptr == strchr (argv[i], ':'))

              strcpy (sharefilename, ++ptr);

            else if (ptr == strrchr (argv[i], '/'))

              strcpy (sharefilename, ++ptr);

            else

              strcpy (sharefilename, argv[i]);

            len = strlen (sharefilename);

            if (strncasecmp (&sharefilename[len-4], ".exe", 4) == 0)

              sharefilename[len-4] = 0;

            for (ptr = sharefilename; *ptr; ptr++)

              *ptr = TOUPPER (*ptr);

          }

      }

}

static void

process_args (int *p_argc, char **argv)

{

  int i;

  for (i = 1; i < *p_argc; i++)

    {

      if (strlen (argv[i]) < 2)

        continue;

      if (strncmp (argv[i], "-L", 2) == 0)

        {

          char *nbuff, *ptr;

          int new_len, search_dirs_len;

          ptr = &argv[i][2];

          new_len = strlen (ptr);

          search_dirs_len = strlen (search_dirs);

          nbuff = xmalloc (new_len + 1);

          strcpy (nbuff, ptr);

          /* Remove trailing slashes.  */

          while (new_len > 1 && nbuff [new_len - 1] == '/')

            {

              nbuff [new_len - 1] = 0;

              new_len--;

            }

          search_dirs = xrealloc (search_dirs, search_dirs_len + new_len + 2);

          if (search_dirs_len > 0)

            strcat (search_dirs, PATH_SEPARATOR_STR);

          strcat (search_dirs, nbuff);

          free (nbuff);

        }

      /* -v turns on verbose option here and is passed on to gcc.  */

      else if (strcmp (argv[i], "-v") == 0)

        verbose = 1;

      else if (strcmp (argv[i], "-g0") == 0)

        addarg ("/notraceback");

      else if (strncmp (argv[i], "-g", 2) == 0)

        {

          addarg ("/debug");

          debug = 1;

        }

      else if (strcmp (argv[i], "-static") == 0)

        staticp = 1;

      else if (strcmp (argv[i], "-map") == 0)

        {

          char *buff, *ptr;

          buff = xmalloc (strlen (exefilename) + 5);

          strcpy (buff, exefilename);

          ptr = strchr (buff, '.');

          if (ptr)

            *ptr = 0;

          strcat (buff, ".map");

          addarg ("/map=");

          addarg (buff);

          addarg ("/full");

        }

      else if (strcmp (argv[i], "-save-temps") == 0)

        save_temps = 1;

      else if (strcmp (argv[i], "--noinhibit-exec") == 0)

        inhibit_exec = 0;

    }

}

/* The main program.  Spawn the VMS linker after fixing up the Unix-like flags

   and args to be what the VMS linker wants.  */

int

main (int argc, char **argv)

{

  int i;

  char cwdev [128], *devptr;

  int devlen;

  int optfd;

  FILE *optfile;

  char *cwd = getcwd (0, 1024);

  char *optfilename;

  devptr = strchr (cwd, ':');

  devlen = (devptr - cwd) + 1;

  strncpy (cwdev, cwd, devlen);

  cwdev [devlen] = '\0';

  search_dirs = xstrdup (system_search_dirs);

  addarg ("link");

  /* Pass to find args that have to be append first.  */

  preprocess_args (&argc , argv);

  /* Pass to find the rest of the args.  */

  process_args (&argc , argv);

  /* Create a temp file to hold args, otherwise we can easily exceed the VMS

     command line length limits.  */

  optfilename = alloca (strlen ("LDXXXXXX") + 1);

  strcpy (optfilename, "LDXXXXXX");

  optfd = mkstemp (optfilename);

  getcwd (optfilefullname, 256, 1); /* VMS style cwd.  */

  strcat (optfilefullname, optfilename);

  strcat (optfilefullname, ".");

  optfile = fdopen (optfd, "w");

  /* Write out the IDENTIFICATION argument first so that it can be overridden

     by an options file.  */

  for (i = 1; i < argc; i++)

    {

      int arg_len = strlen (argv[i]);

      if (arg_len > 6 && strncasecmp (argv[i], "IDENT=", 6) == 0)

        {

          /* Comes from command line. If present will always appear before

             IDENTIFICATION=... and will override.  */

          if (!ident)

            ident = 1;

        }

      else if (arg_len > 15

               && strncasecmp (argv[i], "IDENTIFICATION=", 15) == 0)

        {

          /* Comes from pragma Ident ().  */

          if (!ident)

            {

              fprintf (optfile, "case_sensitive=yes\n");

              fprintf (optfile, "IDENTIFICATION=\"%15.15s\"\n", &argv[i][15]);

              fprintf (optfile, "case_sensitive=NO\n");

              ident = 1;

            }

        }

    }

  for (i = 1; i < argc; i++)

    {

      int arg_len = strlen (argv[i]);

      if (strcmp (argv[i], "-o") == 0)

        i++;

      else if (arg_len > 2 && strncmp (argv[i], "-l", 2) == 0)

        {

          const char *libname = expand_lib (&argv[i][2]);

          const char *ext;

          int len;

          if ((len = strlen (libname)) > 0)

            {

              char buff [256];

              if (len > 4 && strcasecmp (&libname [len-4], ".exe") == 0)

                ext = "/shareable";

              else

                ext = "/library";

              if (libname[0] == '[')

                sprintf (buff, "%s%s", cwdev, libname);

              else

                sprintf (buff, "%s", libname);

              fprintf (optfile, "%s%s\n", buff, ext);

            }

        }

      else if (strcmp (argv[i], "-v" ) == 0

               || strncmp (argv[i], "-g", 2 ) == 0

               || strcmp (argv[i], "-static" ) == 0

               || strcmp (argv[i], "-map" ) == 0

               || strcmp (argv[i], "-save-temps") == 0

               || strcmp (argv[i], "--noinhibit-exec") == 0

               || (arg_len > 2 && strncmp (argv[i], "-L", 2) == 0)

               || (arg_len >= 6 && strncmp (argv[i], "-share", 6) == 0))

        ;

      else if (arg_len > 1 && argv[i][0] == '@')

        {

          FILE *atfile;

          char *ptr, *ptr1;

          struct stat statbuf;

          char *buff;

          int len;

          if (stat (&argv[i][1], &statbuf))

            {

              fprintf (stderr, "Couldn't open linker response file: %s\n",

                       &argv[i][1]);

              exit (1);

            }

          buff = xmalloc (statbuf.st_size + 1);

          atfile = fopen (&argv[i][1], "r");

          fgets (buff, statbuf.st_size + 1, atfile);

          fclose (atfile);

          len = strlen (buff);

          if (buff [len - 1] == '\n')

            {

              buff [len - 1] = 0;

              len--;

            }

          ptr = buff;

          do

          {

             ptr1 = strchr (ptr, ' ');

             if (ptr1)

               *ptr1 = 0;

             ptr = to_host_file_spec (ptr);

             if (ptr[0] == '[')

               fprintf (optfile, "%s%s\n", cwdev, ptr);

             else

               fprintf (optfile, "%s\n", ptr);

             ptr = ptr1 + 1;

          } while (ptr1);

        }

      /* Unix style file specs and VMS style switches look alike, so assume an

         arg consisting of one and only one slash, and that being first, is

         really a switch.  */

      else if ((argv[i][0] == '/') && (strchr (&argv[i][1], '/') == 0))

        addarg (argv[i]);

      else if (arg_len > 4

               && strncasecmp (&argv[i][arg_len-4], ".OPT", 4) == 0)

        {

          FILE *optfile1;

          char buff [256];

          optfile1 = fopen (argv[i], "r");

          while (fgets (buff, 256, optfile1))

            fputs (buff, optfile);

          fclose (optfile1);

        }

      else if (arg_len > 7 && strncasecmp (argv[i], "GSMATCH", 7) == 0)

        fprintf (optfile, "%s\n", argv[i]);

      else if (arg_len > 6 && strncasecmp (argv[i], "IDENT=", 6) == 0)

        {

          /* Comes from command line and will override pragma.  */

          fprintf (optfile, "case_sensitive=yes\n");

          fprintf (optfile, "IDENT=\"%15.15s\"\n", &argv[i][6]);

          fprintf (optfile, "case_sensitive=NO\n");

          ident = 1;

        }

      else if (arg_len > 15

               && strncasecmp (argv[i], "IDENTIFICATION=", 15) == 0)

        ;

      else

        {

          /* Assume filename arg.  */

          const char *addswitch = "";

          char buff [256];

          int buff_len;

          int is_cld = 0;

          argv[i] = to_host_file_spec (argv[i]);

          arg_len = strlen (argv[i]);

          if (arg_len > 4 && strcasecmp (&argv[i][arg_len-4], ".exe") == 0)

            addswitch = "/shareable";

          if (arg_len > 4 && strcasecmp (&argv[i][arg_len-4], ".cld") == 0)

            {

              addswitch = "/shareable";

              is_cld = 1;

            }

          if (arg_len > 2 && strcasecmp (&argv[i][arg_len-2], ".a") == 0)

            addswitch = "/lib";

          if (arg_len > 4 && strcasecmp (&argv[i][arg_len-4], ".olb") == 0)

            addswitch = "/lib";

          if (argv[i][0] == '[')

            sprintf (buff, "%s%s%s\n", cwdev, argv[i], addswitch);

          else if (strchr (argv[i], ':'))

            sprintf (buff, "%s%s\n", argv[i], addswitch);

          else

            sprintf (buff, "%s%s%s\n", cwd, argv[i], addswitch);

          buff_len = strlen (buff);

          if (buff_len >= 15

              && strcasecmp (&buff[buff_len - 15], "vms-dwarf2eh.o\n") == 0)

            vmsdwarf2ehspec = xstrdup (buff);

          else if (buff_len >= 13

              && strcasecmp (&buff[buff_len - 13],"vms-dwarf2.o\n") == 0)

            vmsdwarf2spec = xstrdup (buff);

          else if (is_cld)

            {

              addarg (buff);

              addarg (",");

            }

          else

            fprintf (optfile, buff);

        }

    }

#if 0

  if (share)

    fprintf (optfile, "symbol_vector=(main=procedure)\n");

#endif

  if (vmsdwarf2ehspec)

    {

      fprintf (optfile, "case_sensitive=yes\n");

      fprintf (optfile, "cluster=DWARF2eh,,,%s", vmsdwarf2ehspec);

      fprintf (optfile, "collect=DWARF2eh,eh_frame\n");

      fprintf (optfile, "case_sensitive=NO\n");

    }

  if (debug && vmsdwarf2spec)

    {

      fprintf (optfile, "case_sensitive=yes\n");

      fprintf (optfile, "cluster=DWARF2debug,,,%s", vmsdwarf2spec);

      fprintf (optfile, "collect=DWARF2debug,debug_abbrev,debug_aranges,-\n");

      fprintf (optfile, " debug_frame,debug_info,debug_line,debug_loc,-\n");