gcc/config/i386/xm-djgpp.h

   1 /* Configuration for GNU C-compiler for Intel 80386 running DJGPP.
   2    Copyright (C) 1988, 1996, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* Use semicolons to separate elements of a path.  */
  22 #define PATH_SEPARATOR ';'
  23
  24 #define HOST_EXECUTABLE_SUFFIX ".exe"
  25
  26 /* Even though we support "/", allow "\" since everybody tests both.  */
  27 #define DIR_SEPARATOR '/'
  28 #define DIR_SEPARATOR_2 '\\'
  29
  30 /* Allow test for DOS drive names.  */
  31 #define HAVE_DOS_BASED_FILE_SYSTEM
  32
  33 /* System dependent initialization for collect2
  34    to tell system() to act like Unix.  */
  35 #define COLLECT2_HOST_INITIALIZATION \
  36   do { __system_flags |= (__system_allow_multiple_cmds                  \
  37                           | __system_emulate_chdir); } while (0)
  38
  39 /* Define a version appropriate for DOS.  */
  40 #undef XREF_FILE_NAME
  41 #define XREF_FILE_NAME(xref_file, file) \
  42   do { \
  43     const char xref_ext[] = ".gxref"; \
  44     strcpy (xref_file, file); \
  45     s = basename (xref_file); \
  46     t = strchr (s, '.'); \
  47     if (t) \
  48       strcpy (t, xref_ext); \
  49     else \
  50       strcat (xref_file, xref_ext); \
  51   } while (0)
  52
  53 /* Change /dev/env/DJDIR/prefix/dir/ to canonical form so gcc_exec_prefix
  54    is set properly in 'gcc.c'. It also helps to cut down the number of times
  55    the value of the DJGPP environment variable 'DJDIR' is evaluated.  */
  56 #undef GCC_DRIVER_HOST_INITIALIZATION
  57 #define GCC_DRIVER_HOST_INITIALIZATION \
  58   do { \
  59     /* If the environment variable DJDIR is not defined, then DJGPP is not \
  60        installed correctly and GCC will quickly become confused with the \
  61        default prefix settings. Report the problem now so the user doesn't \
  62        receive deceptive "file not found" error messages later.  */ \
  63     char *djdir = getenv ("DJDIR"); \
  64     if (djdir == NULL) \
  65       { \
  66         /* DJDIR is automatically defined by the DJGPP environment config \
  67            file pointed to by the environment variable DJGPP. Examine DJGPP \
  68            to try and figure out what's wrong.  */ \
  69         char *djgpp = getenv ("DJGPP"); \
  70         if (djgpp == NULL) \
  71           fatal ("environment variable DJGPP not defined"); \
  72         else if (access (djgpp, R_OK) == 0) \
  73           fatal ("environment variable DJGPP points to missing file '%s'", \
  74                  djgpp); \
  75         else \
  76           fatal ("environment variable DJGPP points to corrupt file '%s'", \
  77                   djgpp); \
  78       } \
  79     standard_exec_prefix = update_path (standard_exec_prefix, NULL); \
  80     standard_bindir_prefix = update_path (standard_bindir_prefix, NULL); \
  81     standard_startfile_prefix = update_path (standard_startfile_prefix, NULL); \
  82   } while (0)
  83
  84 /* Canonicalize paths containing '/dev/env/'; used in prefix.c.
  85    _fixpath is a djgpp-specific function to canonicalize a path.
  86    "/dev/env/DJDIR" evaluates to "c:/djgpp" if DJDIR is "c:/djgpp" for
  87    example.  It removes any trailing '/', so add it back.  */
  88 /* We cannot free PATH below as it can point to string constant  */
  89 #define UPDATE_PATH_HOST_CANONICALIZE(PATH) \
  90   if (memcmp ((PATH), "/dev/env/", sizeof("/dev/env/") - 1) == 0) \
  91     {                                           \
  92       static char fixed_path[FILENAME_MAX + 1]; \
  93                                                 \
  94       _fixpath ((PATH), fixed_path);            \
  95       strcat (fixed_path, "/");                 \
  96       (PATH) = xstrdup (fixed_path);            \
  97     }