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 /* As a special exception, if you link this library with other files,
  23    some of which are compiled with GCC, to produce an executable,
  24    this library does not by itself cause the resulting executable
  25    to be covered by the GNU General Public License.
  26    This exception does not however invalidate any other reasons why
  27    the executable file might be covered by the GNU General Public License.  */
  28
  29 #ifndef GCC_TSYSTEM_H
  30 #define GCC_TSYSTEM_H
  31
  32 /* System headers (e.g. stdio.h, stdlib.h, unistd.h) sometimes
  33    indirectly include getopt.h.  Our -I flags will cause gcc's gnu
  34    getopt.h to be included, not the platform's copy.  In the default
  35    case, gnu getopt.h will provide us with a no-argument prototype
  36    which will generate -Wstrict-prototypes warnings.  None of the
  37    target files actually use getopt, so it is safe to tell gnu
  38    getopt.h we never need this prototype.  */
  39 #ifndef HAVE_DECL_GETOPT
  40 #define HAVE_DECL_GETOPT 1
  41 #endif
  42
  43 /* GCC supplies these headers.  */
  44 #include <stddef.h>
  45 #include <float.h>
  46
  47 #ifdef inhibit_libc
  48
  49 #ifndef malloc
  50 extern void *malloc (size_t);
  51 #endif
  52
  53 #ifndef free
  54 extern void free (void *);
  55 #endif
  56
  57 #ifndef atexit
  58 extern int atexit (void (*)(void));
  59 #endif
  60
  61 #ifndef abort
  62 extern void abort (void) __attribute__ ((__noreturn__));
  63 #endif
  64
  65 #else /* ! inhibit_libc */
  66 /* We disable this when inhibit_libc, so that gcc can still be built without
  67    needing header files first.  */
  68 /* ??? This is not a good solution, since prototypes may be required in
  69    some cases for correct code.  */
  70
  71 /* GCC supplies this header.  */
  72 #include <stdarg.h>
  73
  74 /* All systems have this header.  */
  75 #include <stdio.h>
  76
  77 /* All systems have this header.  */
  78 #include <sys/types.h>
  79
  80 /* All systems have this header.  */
  81 #include <errno.h>
  82
  83 #ifndef errno
  84 extern int errno;
  85 #endif
  86
  87 /* GCC (fixproto) guarantees these system headers exist.  */
  88 #include <string.h>
  89 #include <stdlib.h>
  90 #include <unistd.h>
  91
  92 /* GCC supplies this header.  */
  93 #include <limits.h>
  94
  95 /* GCC (fixproto) guarantees this system headers exists.  */
  96 #include <time.h>
  97
  98 #endif /* inhibit_libc */
  99
 100 /* Define a generic NULL if one hasn't already been defined.  */
 101 #ifndef NULL
 102 #define NULL 0
 103 #endif
 104
 105 #endif /* ! GCC_TSYSTEM_H */