138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
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/* Get common system includes and various definitions and declarations
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based on target macros.
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Copyright (C) 2000-2023 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_TSYSTEM_H
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#define GCC_TSYSTEM_H
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/* System headers (e.g. stdio.h, stdlib.h, unistd.h) sometimes
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indirectly include getopt.h. Our -I flags will cause gcc's gnu
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getopt.h to be included, not the platform's copy. In the default
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case, gnu getopt.h will provide us with a no-argument prototype
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which will generate -Wstrict-prototypes warnings. None of the
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target files actually use getopt, so it is safe to tell gnu
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getopt.h we never need this prototype. */
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#ifndef HAVE_DECL_GETOPT
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#define HAVE_DECL_GETOPT 1
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#endif
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/* We want everything from the glibc headers. */
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#define _GNU_SOURCE 1
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/* GCC supplies these headers. */
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#include <stddef.h>
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#include <float.h>
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#ifdef inhibit_libc
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#ifndef malloc
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extern void *malloc (size_t);
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#endif
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#ifndef free
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extern void free (void *);
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#endif
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#ifndef atexit
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extern int atexit (void (*)(void));
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#endif
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#ifndef abort
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#define abort() __builtin_trap ()
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#endif
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#ifndef strlen
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extern size_t strlen (const char *);
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#endif
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#ifndef memcpy
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extern void *memcpy (void *, const void *, size_t);
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#endif
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#ifndef memset
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extern void *memset (void *, int, size_t);
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#endif
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#else /* ! inhibit_libc */
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/* We disable this when inhibit_libc, so that gcc can still be built without
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needing header files first. */
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/* ??? This is not a good solution, since prototypes may be required in
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some cases for correct code. */
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/* GCC supplies this header. */
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#include <stdarg.h>
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/* All systems have this header. */
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#include <stdio.h>
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/* All systems have this header. */
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#include <sys/types.h>
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/* All systems have this header. */
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#include <errno.h>
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#ifndef errno
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extern int errno;
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#endif
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/* If these system headers do not exist, fixincludes must create them. */
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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/* GCC supplies this header. */
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#include <limits.h>
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/* If these system headers do not exist, fixincludes must create them. */
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#include <time.h>
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#endif /* inhibit_libc */
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/* Define a generic NULL if one hasn't already been defined. */
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#ifndef NULL
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#define NULL 0
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#endif
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/* GCC always provides __builtin_alloca(x). */
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#undef alloca
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#define alloca(x) __builtin_alloca(x)
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#ifdef ENABLE_RUNTIME_CHECKING
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#define gcc_assert(EXPR) ((void)(!(EXPR) ? abort (), 0 : 0))
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#else
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/* Include EXPR, so that unused variable warnings do not occur. */
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#define gcc_assert(EXPR) ((void)(0 && (EXPR)))
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#endif
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/* Use gcc_unreachable() to mark unreachable locations (like an
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unreachable default case of a switch. Do not use gcc_assert(0). */
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#define gcc_unreachable() (abort ())
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#define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
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#define CONST_CAST(TYPE,X) CONST_CAST2 (TYPE, const TYPE, (X))
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/* Filename handling macros. */
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#include "filenames.h"
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#endif /* ! GCC_TSYSTEM_H */
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