tsystem.h

/* 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 */