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-rw-r--r--include/sys/cdefs.h222
1 files changed, 195 insertions, 27 deletions
diff --git a/include/sys/cdefs.h b/include/sys/cdefs.h
index 7df9f1e52..02454ee4d 100644
--- a/include/sys/cdefs.h
+++ b/include/sys/cdefs.h
@@ -1,49 +1,217 @@
+/* Copyright (C) 1992,93,94,95,96,97,98,99,2000,2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
-#ifndef __SYS_CDEFS_H
-#define __SYS_CDEFS_H
-#include <features.h>
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
-#if defined (__STDC__) && __STDC__
+ The GNU C Library 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
+ Lesser General Public License for more details.
-#define __CONCAT(x,y) x ## y
-#define __STRING(x) #x
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _SYS_CDEFS_H
+#define _SYS_CDEFS_H 1
+
+/* We are almost always included from features.h. */
+#ifndef _FEATURES_H
+# include <features.h>
+#endif
+
+/* The GNU libc does not support any K&R compilers or the traditional mode
+ of ISO C compilers anymore. Check for some of the combinations not
+ anymore supported. */
+#if defined __GNUC__ && !defined __STDC__
+# error "You need a ISO C conforming compiler to use the glibc headers"
+#endif
+
+/* Some user header file might have defined this before. */
+#undef __P
+#undef __PMT
+
+#ifdef __GNUC__
+
+/* GCC can always grok prototypes. For C++ programs we add throw()
+ to help it optimize the function calls. But this works only with
+ gcc 2.8.x and egcs. */
+# if defined __cplusplus && __GNUC_PREREQ (2,8)
+# define __THROW throw ()
+# else
+# define __THROW
+# endif
+# define __P(args) args __THROW
+/* This macro will be used for functions which might take C++ callback
+ functions. */
+# define __PMT(args) args
+
+#else /* Not GCC. */
+
+# define __inline /* No inline functions. */
+
+# define __THROW
+# define __P(args) args
+# define __PMT(args) args
+
+# define __const const
+# define __signed signed
+# define __volatile volatile
+
+#endif /* GCC. */
+
+/* For these things, GCC behaves the ANSI way normally,
+ and the non-ANSI way under -traditional. */
+
+#define __CONCAT(x,y) x ## y
+#define __STRING(x) #x
/* This is not a typedef so `const __ptr_t' does the right thing. */
#define __ptr_t void *
+#define __long_double_t long double
+
+
+/* C++ needs to know that types and declarations are C, not C++. */
+#ifdef __cplusplus
+# define __BEGIN_DECLS extern "C" {
+# define __END_DECLS }
+#else
+# define __BEGIN_DECLS
+# define __END_DECLS
+#endif
+
+/* Support for bounded pointers. */
+#ifndef __BOUNDED_POINTERS__
+# define __bounded /* nothing */
+# define __unbounded /* nothing */
+# define __ptrvalue /* nothing */
+#endif
+
+
+/* Support for flexible arrays. */
+#if __GNUC_PREREQ (2,97)
+/* GCC 2.97 supports C99 flexible array members. */
+# define __flexarr []
#else
+# ifdef __GNUC__
+# define __flexarr [0]
+# else
+# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
+# define __flexarr []
+# else
+/* Some other non-C99 compiler. Approximate with [1]. */
+# define __flexarr [1]
+# endif
+# endif
+#endif
+
+
+/* __asm__ ("xyz") is used throughout the headers to rename functions
+ at the assembly language level. This is wrapped by the __REDIRECT
+ macro, in order to support compilers that can do this some other
+ way. When compilers don't support asm-names at all, we have to do
+ preprocessor tricks instead (which don't have exactly the right
+ semantics, but it's the best we can do).
+
+ Example:
+ int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid); */
-#define __CONCAT(x,y) x/**/y
-#define __STRING(x) "x"
+#if defined __GNUC__ && __GNUC__ >= 2
-#define __ptr_t char *
+# define __REDIRECT(name, proto, alias) name proto __asm__ (__ASMNAME (#alias))
+# define __ASMNAME(cname) __ASMNAME2 (__USER_LABEL_PREFIX__, cname)
+# define __ASMNAME2(prefix, cname) __STRING (prefix) cname
+/*
+#elif __SOME_OTHER_COMPILER__
+
+# define __REDIRECT(name, proto, alias) name proto; \
+ _Pragma("let " #name " = " #alias)
+*/
#endif
-/* C++ needs to know that types and declarations are C, not C++. */
-#ifdef __cplusplus
-# define __BEGIN_DECLS extern "C" {
-# define __END_DECLS }
+/* GCC has various useful declarations that can be made with the
+ `__attribute__' syntax. All of the ways we use this do fine if
+ they are omitted for compilers that don't understand it. */
+#if !defined __GNUC__ || __GNUC__ < 2
+# define __attribute__(xyz) /* Ignore */
+#endif
+
+/* At some point during the gcc 2.96 development the `malloc' attribute
+ for functions was introduced. We don't want to use it unconditionally
+ (although this would be possible) since it generates warnings. */
+#if __GNUC_PREREQ (2,96)
+# define __attribute_malloc__ __attribute__ ((__malloc__))
#else
-# define __BEGIN_DECLS
-# define __END_DECLS
+# define __attribute_malloc__ /* Ignore */
#endif
-/* GNUish things */
-#define __CONSTVALUE
-#define __CONSTVALUE2
+/* At some point during the gcc 2.96 development the `pure' attribute
+ for functions was introduced. We don't want to use it unconditionally
+ (although this would be possible) since it generates warnings. */
+#if __GNUC_PREREQ (2,96)
+# define __attribute_pure__ __attribute__ ((__pure__))
+#else
+# define __attribute_pure__ /* Ignore */
+#endif
-#ifdef __GNUC__
-/* GCC can always grok prototypes. For C++ programs we add throw()
- to help it optimize the function calls. But this works only with
- gcc 2.8.x and egcs. */
-#if defined __cplusplus && __GNUC_PREREQ (2,8)
-#define __THROW throw()
+/* At some point during the gcc 2.8 development the `format_arg' attribute
+ for functions was introduced. We don't want to use it unconditionally
+ (although this would be possible) since it generates warnings.
+ If several `format_arg' attributes are given for the same function, in
+ gcc-3.0 and older, all but the last one are ignored. In newer gccs,
+ all designated arguments are considered. */
+#if __GNUC_PREREQ (2,8)
+# define __attribute_format_arg__(x) __attribute__ ((__format_arg__ (x)))
#else
-#define __THROW
+# define __attribute_format_arg__(x) /* Ignore */
#endif
-#else /* GCC */
-#define __THROW
+
+/* At some point during the gcc 2.97 development the `strfmon' format
+ attribute for functions was introduced. We don't want to use it
+ unconditionally (although this would be possible) since it
+ generates warnings. */
+#if __GNUC_PREREQ (2,97)
+# define __attribute_format_strfmon__(a,b) \
+ __attribute__ ((__format__ (__strfmon__, a, b)))
+#else
+# define __attribute_format_strfmon__(a,b) /* Ignore */
#endif
+/* It is possible to compile containing GCC extensions even if GCC is
+ run in pedantic mode if the uses are carefully marked using the
+ `__extension__' keyword. But this is not generally available before
+ version 2.8. */
+#if !__GNUC_PREREQ (2,8)
+# define __extension__ /* Ignore */
#endif
+
+/* __restrict is known in EGCS 1.2 and above. */
+#if !__GNUC_PREREQ (2,92)
+# define __restrict /* Ignore */
+#endif
+
+/* ISO C99 also allows to declare arrays as non-overlapping. The syntax is
+ array_name[restrict]
+ GCC 3.1 supports this. */
+#if __GNUC_PREREQ (3,1) && !defined __GNUG__
+# define __restrict_arr __restrict
+#else
+# ifdef __GNUC__
+# define __restrict_arr /* Not supported in old GCC. */
+# else
+# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
+# define __restrict_arr restrict
+# else
+/* Some other non-C99 compiler. */
+# define __restrict_arr /* Not supported. */
+# endif
+# endif
+#endif
+
+#endif /* sys/cdefs.h */