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/* Get common system includes and various definitions and declarations

   based on target macros.

   Copyright (C) 2000, 2001, 2004, 2005, 2009, 2011

   Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under

the terms of the GNU General Public License as published by the Free

Software Foundation; either version 3, or (at your option) any later

version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY

WARRANTY; without even the implied warranty of MERCHANTABILITY or

FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

for more details.

Under Section 7 of GPL version 3, you are granted additional

permissions described in the GCC Runtime Library Exception, version

3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and

a copy of the GCC Runtime Library Exception along with this program;

see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

<http://www.gnu.org/licenses/>.  */

#ifndef GCC_TSYSTEM_H

#define GCC_TSYSTEM_H

/* System headers (e.g. stdio.h, stdlib.h, unistd.h) sometimes

   indirectly include getopt.h.  Our -I flags will cause gcc's gnu

   getopt.h to be included, not the platform's copy.  In the default

   case, gnu getopt.h will provide us with a no-argument prototype

   which will generate -Wstrict-prototypes warnings.  None of the

   target files actually use getopt, so it is safe to tell gnu

   getopt.h we never need this prototype.  */

#ifndef HAVE_DECL_GETOPT

#define HAVE_DECL_GETOPT 1

#endif

/* We want everything from the glibc headers.  */

#define _GNU_SOURCE 1

/* GCC supplies these headers.  */

#include <stddef.h>

#include <float.h>

#ifdef inhibit_libc

#ifndef malloc

extern void *malloc (size_t);

#endif

#ifndef free

extern void free (void *);

#endif

#ifndef atexit

extern int atexit (void (*)(void));

#endif

#ifndef abort

extern void abort (void) __attribute__ ((__noreturn__));

#endif

#ifndef strlen

extern size_t strlen (const char *);

#endif

#ifndef memcpy

extern void *memcpy (void *, const void *, size_t);

#endif

#ifndef memset

extern void *memset (void *, int, size_t);

#endif

#else /* ! inhibit_libc */

/* We disable this when inhibit_libc, so that gcc can still be built without

   needing header files first.  */

/* ??? This is not a good solution, since prototypes may be required in

   some cases for correct code.  */

/* GCC supplies this header.  */

#include <stdarg.h>

/* All systems have this header.  */

#include <stdio.h>

/* All systems have this header.  */

#include <sys/types.h>

/* All systems have this header.  */

#include <errno.h>

#ifndef errno

extern int errno;

#endif

/* If these system headers do not exist, fixincludes must create them.  */

#include <string.h>

#include <stdlib.h>

#include <unistd.h>

/* GCC supplies this header.  */

#include <limits.h>

/* If these system headers do not exist, fixincludes must create them.  */

#include <time.h>

#endif /* inhibit_libc */

/* Define a generic NULL if one hasn't already been defined.  */

#ifndef NULL

#define NULL 0

#endif

/* GCC always provides __builtin_alloca(x).  */

#undef alloca

#define alloca(x) __builtin_alloca(x)

#ifdef ENABLE_RUNTIME_CHECKING

#define gcc_assert(EXPR) ((void)(!(EXPR) ? abort (), 0 : 0))

#else

/* Include EXPR, so that unused variable warnings do not occur.  */

#define gcc_assert(EXPR) ((void)(0 && (EXPR)))

#endif

/* Use gcc_unreachable() to mark unreachable locations (like an

   unreachable default case of a switch.  Do not use gcc_assert(0).  */

#define gcc_unreachable() (abort ())

#define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)

#define CONST_CAST(TYPE,X) CONST_CAST2(TYPE, const TYPE, (X))

/* Filename handling macros.  */

#include "filenames.h"

#endif /* ! GCC_TSYSTEM_H */