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 GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 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 these headers.  */
  37 #include <stddef.h>
  38 #include <float.h>
  39
  40 #ifdef inhibit_libc
  41
  42 #ifndef malloc
  43 extern void *malloc (size_t);
  44 #endif
  45
  46 #ifndef free
  47 extern void free (void *);
  48 #endif
  49
  50 #ifndef atexit
  51 extern int atexit (void (*)(void));
  52 #endif
  53
  54 #else /* ! inhibit_libc */
  55 /* We disable this when inhibit_libc, so that gcc can still be built without
  56    needing header files first.  */
  57 /* ??? This is not a good solution, since prototypes may be required in
  58    some cases for correct code.  */
  59
  60 /* GCC supplies this header.  */
  61 #include <stdarg.h>
  62
  63 /* All systems have this header.  */
  64 #include <stdio.h>
  65
  66 /* All systems have this header.  */
  67 #include <sys/types.h>
  68
  69 /* All systems have this header.  */
  70 #include <errno.h>
  71
  72 #ifndef errno
  73 extern int errno;
  74 #endif
  75
  76 #ifdef POSIX
  77 #include <string.h>
  78 #endif
  79
  80 /* GCC (fixproto) guarantees these system headers exist.  */
  81 #include <stdlib.h>
  82 #include <unistd.h>
  83
  84 /* GCC supplies this header.  */
  85 #include <limits.h>
  86
  87 #ifdef POSIX
  88 #include <time.h>
  89 #endif
  90
  91 #endif /* inhibit_libc */
  92
  93 /* Define a generic NULL if one hasn't already been defined.  */
  94 #ifndef NULL
  95 #define NULL 0
  96 #endif
  97
  98 #endif /* ! GCC_TSYSTEM_H */