1/* Get common system includes and various definitions and declarations
2   based on target macros.
3   Copyright (C) 2000, 2001, 2004, 2005 Free Software Foundation, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING.  If not, write to the Free
19Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
2002110-1301, 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/* We want everything from the glibc headers.  */
44#define _GNU_SOURCE 1
45
46/* GCC supplies these headers.  */
47#include <stddef.h>
48#include <float.h>
49
50#ifdef inhibit_libc
51
52#ifndef malloc
53extern void *malloc (size_t);
54#endif
55
56#ifndef free
57extern void free (void *);
58#endif
59
60#ifndef atexit
61extern int atexit (void (*)(void));
62#endif
63
64#ifndef abort
65extern void abort (void) __attribute__ ((__noreturn__));
66#endif
67
68#ifndef strlen
69extern size_t strlen (const char *);
70#endif
71
72#ifndef memcpy
73extern void *memcpy (void *, const void *, size_t);
74#endif
75
76#ifndef memset
77extern void *memset (void *, int, size_t);
78#endif
79
80#else /* ! inhibit_libc */
81/* We disable this when inhibit_libc, so that gcc can still be built without
82   needing header files first.  */
83/* ??? This is not a good solution, since prototypes may be required in
84   some cases for correct code.  */
85
86/* GCC supplies this header.  */
87#include <stdarg.h>
88
89/* All systems have this header.  */
90#include <stdio.h>
91
92/* All systems have this header.  */
93#include <sys/types.h>
94
95/* All systems have this header.  */
96#include <errno.h>
97
98#ifndef errno
99extern int errno;
100#endif
101
102/* GCC (fixproto) guarantees these system headers exist.  */
103#include <string.h>
104#include <stdlib.h>
105#include <unistd.h>
106
107/* GCC supplies this header.  */
108#include <limits.h>
109
110/* GCC (fixproto) guarantees this system headers exists.  */
111#include <time.h>
112
113#endif /* inhibit_libc */
114
115/* Define a generic NULL if one hasn't already been defined.  */
116#ifndef NULL
117#define NULL 0
118#endif
119
120/* GCC always provides __builtin_alloca(x).  */
121#undef alloca
122#define alloca(x) __builtin_alloca(x)
123
124#ifdef ENABLE_RUNTIME_CHECKING
125#define gcc_assert(EXPR) ((void)(!(EXPR) ? abort (), 0 : 0))
126#else
127/* Include EXPR, so that unused variable warnings do not occur.  */
128#define gcc_assert(EXPR) ((void)(0 && (EXPR)))
129#endif
130/* Use gcc_unreachable() to mark unreachable locations (like an
131   unreachable default case of a switch.  Do not use gcc_assert(0).  */
132#define gcc_unreachable() (abort ())
133
134/* Filename handling macros.  */
135#include "filenames.h"
136
137#endif /* ! GCC_TSYSTEM_H */
138