gcc/tsystem.h

   1 /* Get common system includes and various definitions and declarations
   2    based on target macros.
   3    Copyright (C) 2000, 2001 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef __GCC_TSYSTEM_H__
  23 #define __GCC_TSYSTEM_H__
  24
  25 /* System headers (e.g. stdio.h, stdlib.h, unistd.h) sometimes
  26    indirectly include getopt.h.  Our -I flags will cause gcc's gnu
  27    getopt.h to be included, not the platform's copy.  In the default
  28    case, gnu getopt.h will provide us with a no-argument prototype
  29    which will generate -Wstrict-prototypes warnings.  None of the
  30    target files actually use getopt, so it is safe to tell gnu
  31    getopt.h we never need this prototype.  */
  32 #ifndef HAVE_DECL_GETOPT
  33 #define HAVE_DECL_GETOPT 1
  34 #endif
  35
  36 /* GCC supplies this header. */
  37 #include <stddef.h>
  38
  39 #ifdef inhibit_libc
  40
  41 #ifndef malloc
  42 extern void *malloc (size_t);
  43 #endif
  44
  45 #ifndef free
  46 extern void free (void *);
  47 #endif
  48
  49 #ifndef atexit
  50 extern int atexit (void (*)(void));
  51 #endif
  52
  53 #else /* ! inhibit_libc */
  54 /* We disable this when inhibit_libc, so that gcc can still be built without
  55    needing header files first.  */
  56 /* ??? This is not a good solution, since prototypes may be required in
  57    some cases for correct code.  */
  58
  59 /* GCC supplies this header. */
  60 #include <stdarg.h>
  61
  62 /* All systems have this header. */
  63 #include <stdio.h>
  64
  65 /* All systems have this header. */
  66 #include <sys/types.h>
  67
  68 /* All systems have this header. */
  69 #include <errno.h>
  70
  71 #ifndef errno
  72 extern int errno;
  73 #endif
  74
  75 #if defined(POSIX) || defined(USG)
  76 #include <string.h>
  77 #endif
  78
  79 /* GCC (fixproto) guarantees these system headers exist. */
  80 #include <stdlib.h>
  81 #include <unistd.h>
  82
  83 /* GCC supplies this header. */
  84 #include <limits.h>
  85
  86 #if defined(POSIX) || defined(USG)
  87 #include <time.h>
  88 #endif
  89
  90 #endif /* inhibit_libc */
  91
  92 /* Define a generic NULL if one hasn't already been defined.  */
  93 #ifndef NULL
  94 #define NULL 0
  95 #endif
  96
  97 #endif /* __GCC_TSYSTEM_H__ */