456 lines
12 KiB
C
456 lines
12 KiB
C
/* Get common system includes and various definitions and declarations based
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on autoconf macros.
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Copyright (C) 1998-2021 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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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef LIBCPP_SYSTEM_H
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#define LIBCPP_SYSTEM_H
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/* We must include stdarg.h before stdio.h. */
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#include <stdarg.h>
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#ifdef HAVE_STDDEF_H
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# include <stddef.h>
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#endif
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#ifdef HAVE_STDINT_H
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# include <stdint.h>
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#endif
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#ifdef HAVE_INTTYPES_H
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# include <inttypes.h>
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#endif
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#include <stdio.h>
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#ifdef __cplusplus
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#include <new>
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#endif
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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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/* Use the unlocked open routines from libiberty. */
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/* Some of these are #define on some systems, e.g. on AIX to redirect
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the names to 64bit capable functions for LARGE_FILES support. These
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redefs are pointless here so we can override them. */
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#undef fopen
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#undef freopen
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#define fopen(PATH,MODE) fopen_unlocked(PATH,MODE)
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#define fdopen(FILDES,MODE) fdopen_unlocked(FILDES,MODE)
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#define freopen(PATH,MODE,STREAM) freopen_unlocked(PATH,MODE,STREAM)
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/* The compiler is not a multi-threaded application and therefore we
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do not have to use the locking functions. In fact, using the locking
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functions can cause the compiler to be significantly slower under
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I/O bound conditions (such as -g -O0 on very large source files).
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HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
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code is multi-thread safe by default. If it is set to 0, then do
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not worry about using the _unlocked functions.
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fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
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extensions and need to be prototyped by hand (since we do not
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define _GNU_SOURCE). */
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#if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
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# ifdef HAVE_PUTC_UNLOCKED
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# undef putc
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# define putc(C, Stream) putc_unlocked (C, Stream)
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# endif
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# ifdef HAVE_PUTCHAR_UNLOCKED
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# undef putchar
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# define putchar(C) putchar_unlocked (C)
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# endif
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# ifdef HAVE_GETC_UNLOCKED
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# undef getc
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# define getc(Stream) getc_unlocked (Stream)
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# endif
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# ifdef HAVE_GETCHAR_UNLOCKED
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# undef getchar
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# define getchar() getchar_unlocked ()
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# endif
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# ifdef HAVE_FPUTC_UNLOCKED
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# undef fputc
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# define fputc(C, Stream) fputc_unlocked (C, Stream)
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# endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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# ifdef HAVE_CLEARERR_UNLOCKED
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# undef clearerr
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# define clearerr(Stream) clearerr_unlocked (Stream)
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# if defined (HAVE_DECL_CLEARERR_UNLOCKED) && !HAVE_DECL_CLEARERR_UNLOCKED
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extern void clearerr_unlocked (FILE *);
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# endif
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# endif
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# ifdef HAVE_FEOF_UNLOCKED
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# undef feof
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# define feof(Stream) feof_unlocked (Stream)
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# if defined (HAVE_DECL_FEOF_UNLOCKED) && !HAVE_DECL_FEOF_UNLOCKED
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extern int feof_unlocked (FILE *);
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# endif
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# endif
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# ifdef HAVE_FILENO_UNLOCKED
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# undef fileno
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# define fileno(Stream) fileno_unlocked (Stream)
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# if defined (HAVE_DECL_FILENO_UNLOCKED) && !HAVE_DECL_FILENO_UNLOCKED
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extern int fileno_unlocked (FILE *);
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# endif
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# endif
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# ifdef HAVE_FFLUSH_UNLOCKED
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# undef fflush
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# define fflush(Stream) fflush_unlocked (Stream)
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# if defined (HAVE_DECL_FFLUSH_UNLOCKED) && !HAVE_DECL_FFLUSH_UNLOCKED
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extern int fflush_unlocked (FILE *);
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# endif
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# endif
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# ifdef HAVE_FGETC_UNLOCKED
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# undef fgetc
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# define fgetc(Stream) fgetc_unlocked (Stream)
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# if defined (HAVE_DECL_FGETC_UNLOCKED) && !HAVE_DECL_FGETC_UNLOCKED
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extern int fgetc_unlocked (FILE *);
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# endif
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# endif
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# ifdef HAVE_FGETS_UNLOCKED
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# undef fgets
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# define fgets(S, n, Stream) fgets_unlocked (S, n, Stream)
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# if defined (HAVE_DECL_FGETS_UNLOCKED) && !HAVE_DECL_FGETS_UNLOCKED
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extern char *fgets_unlocked (char *, int, FILE *);
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# endif
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# endif
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# ifdef HAVE_FPUTS_UNLOCKED
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# undef fputs
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# define fputs(String, Stream) fputs_unlocked (String, Stream)
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# if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
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extern int fputs_unlocked (const char *, FILE *);
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# endif
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# endif
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# ifdef HAVE_FERROR_UNLOCKED
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# undef ferror
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# define ferror(Stream) ferror_unlocked (Stream)
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# if defined (HAVE_DECL_FERROR_UNLOCKED) && !HAVE_DECL_FERROR_UNLOCKED
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extern int ferror_unlocked (FILE *);
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# endif
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# endif
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# ifdef HAVE_FREAD_UNLOCKED
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# undef fread
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# define fread(Ptr, Size, N, Stream) fread_unlocked (Ptr, Size, N, Stream)
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# if defined (HAVE_DECL_FREAD_UNLOCKED) && !HAVE_DECL_FREAD_UNLOCKED
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extern size_t fread_unlocked (void *, size_t, size_t, FILE *);
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# endif
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# endif
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# ifdef HAVE_FWRITE_UNLOCKED
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# undef fwrite
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# define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
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# if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
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extern size_t fwrite_unlocked (const void *, size_t, size_t, FILE *);
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# endif
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# endif
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# ifdef HAVE_FPRINTF_UNLOCKED
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# undef fprintf
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/* We can't use a function-like macro here because we don't know if
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we have varargs macros. */
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# define fprintf fprintf_unlocked
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# if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
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extern int fprintf_unlocked (FILE *, const char *, ...);
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# endif
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# endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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/* ??? Glibc's fwrite/fread_unlocked macros cause
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"warning: signed and unsigned type in conditional expression". */
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#undef fread_unlocked
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#undef fwrite_unlocked
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#include <sys/types.h>
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#include <errno.h>
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#if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
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extern int errno;
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#endif
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/* Some of glibc's string inlines cause warnings. Plus we'd rather
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rely on (and therefore test) GCC's string builtins. */
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#define __NO_STRING_INLINES
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#ifdef STRING_WITH_STRINGS
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# include <string.h>
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# include <strings.h>
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#else
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# ifdef HAVE_STRING_H
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# include <string.h>
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# else
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# ifdef HAVE_STRINGS_H
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# include <strings.h>
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# endif
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# endif
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#endif
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#if HAVE_LIMITS_H
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# include <limits.h>
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#endif
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/* Infrastructure for defining missing _MAX and _MIN macros. Note that
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macros defined with these cannot be used in #if. */
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/* The extra casts work around common compiler bugs. */
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#define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
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/* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
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It is necessary at least when t == time_t. */
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#define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
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? (t) 1 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
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#define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
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/* Use that infrastructure to provide a few constants. */
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#ifndef UCHAR_MAX
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# define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
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#endif
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#ifdef TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# if HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# ifdef HAVE_TIME_H
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# include <time.h>
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# endif
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# endif
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#endif
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#ifdef HAVE_FCNTL_H
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# include <fcntl.h>
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#else
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# ifdef HAVE_SYS_FILE_H
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# include <sys/file.h>
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# endif
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#endif
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#ifdef HAVE_LOCALE_H
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# include <locale.h>
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#endif
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#ifdef HAVE_LANGINFO_CODESET
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# include <langinfo.h>
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#endif
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#ifndef HAVE_SETLOCALE
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# define setlocale(category, locale) (locale)
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#endif
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#ifdef ENABLE_NLS
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#include <libintl.h>
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#else
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/* Stubs. */
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# undef dgettext
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# define dgettext(package, msgid) (msgid)
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#endif
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#ifndef _
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# define _(msgid) dgettext (PACKAGE, msgid)
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#endif
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#ifndef N_
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# define N_(msgid) msgid
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#endif
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/* Some systems define these in, e.g., param.h. We undefine these names
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here to avoid the warnings. We prefer to use our definitions since we
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know they are correct. */
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#undef MIN
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#undef MAX
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#define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
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#define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
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/* The HAVE_DECL_* macros are three-state, undefined, 0 or 1. If they
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are defined to 0 then we must provide the relevant declaration
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here. These checks will be in the undefined state while configure
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is running so be careful to test "defined (HAVE_DECL_*)". */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
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extern void abort (void);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#if HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
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/* Test if something is a normal file. */
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#ifndef S_ISREG
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#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
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#endif
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/* Test if something is a directory. */
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#ifndef S_ISDIR
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#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
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#endif
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/* Test if something is a character special file. */
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#ifndef S_ISCHR
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#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
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#endif
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/* Test if something is a block special file. */
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#ifndef S_ISBLK
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#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
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#endif
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/* Test if something is a socket. */
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#ifndef S_ISSOCK
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# ifdef S_IFSOCK
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# define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
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# else
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# define S_ISSOCK(m) 0
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# endif
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#endif
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/* Test if something is a FIFO. */
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#ifndef S_ISFIFO
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# ifdef S_IFIFO
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# define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
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# else
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# define S_ISFIFO(m) 0
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# endif
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#endif
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/* Approximate O_NOCTTY and O_BINARY. */
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#ifndef O_NOCTTY
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#define O_NOCTTY 0
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#endif
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#ifndef O_BINARY
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# define O_BINARY 0
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#endif
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/* Filename handling macros. */
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#include "filenames.h"
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/* Get libiberty declarations. */
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#include "libiberty.h"
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#include "safe-ctype.h"
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/* 1 if we have C99 designated initializers.
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??? C99 designated initializers are not supported by most C++
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compilers, including G++. -- gdr, 2005-05-18 */
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#if !defined(HAVE_DESIGNATED_INITIALIZERS)
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#ifdef __cplusplus
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#define HAVE_DESIGNATED_INITIALIZERS 0
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#else
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#define HAVE_DESIGNATED_INITIALIZERS \
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((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L))
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#endif
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#endif
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#ifndef offsetof
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
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#endif
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/* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
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the most likely value of A is B. This feature was added at some point
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between 2.95 and 3.0. Let's use 3.0 as the lower bound for now. */
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#if (GCC_VERSION < 3000)
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#define __builtin_expect(a, b) (a)
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#endif
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/* Redefine abort to report an internal error w/o coredump, and
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reporting the location of the error in the source file. */
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extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
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#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
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/* Use gcc_assert(EXPR) to test invariants. */
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#if ENABLE_ASSERT_CHECKING
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#define gcc_assert(EXPR) \
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((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
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#elif (GCC_VERSION >= 4005)
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#define gcc_assert(EXPR) \
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((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 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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#if CHECKING_P
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#define gcc_checking_assert(EXPR) gcc_assert (EXPR)
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#else
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/* N.B.: in release build EXPR is not evaluated. */
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#define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
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#endif
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/* Poison identifiers we do not want to use. */
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#if (GCC_VERSION >= 3000)
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#undef calloc
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#undef strdup
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#undef malloc
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#undef realloc
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#pragma GCC poison calloc strdup
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#pragma GCC poison malloc realloc
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/* Libiberty macros that are no longer used in GCC. */
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#undef ANSI_PROTOTYPES
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#undef PTR_CONST
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#undef LONG_DOUBLE
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#undef VPARAMS
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#undef VA_OPEN
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#undef VA_FIXEDARG
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#undef VA_CLOSE
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#undef VA_START
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#pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
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VA_FIXEDARG VA_CLOSE VA_START
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/* Note: not all uses of the `index' token (e.g. variable names and
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structure members) have been eliminated. */
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#undef bcopy
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#undef bzero
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#undef bcmp
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#undef rindex
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#pragma GCC poison bcopy bzero bcmp rindex
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#endif /* GCC >= 3.0 */
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#endif /* ! LIBCPP_SYSTEM_H */
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