-/* Copyright (C) 1992, 93, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
+/* Copyright (C) 1992,93,94,95,96,97,98,99, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
#ifndef _SYS_CDEFS_H
#define _SYS_CDEFS_H 1
-#include <features.h>
+/* 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_MINOR__ >= 8
+# if defined __cplusplus && __GNUC_PREREQ (2,8)
# define __THROW throw ()
# else
# define __THROW
/* This macro will be used for functions which might take C++ callback
functions. */
# define __PMT(args) args
-# define __DOTS , ...
#else /* Not GCC. */
# define __inline /* No inline functions. */
-# if (defined __STDC__ && __STDC__) || defined __cplusplus
-
-# define __P(args) args
-# define __PMT(args) args
-# define __const const
-# define __signed signed
-# define __volatile volatile
-# define __DOTS , ...
-
-# else /* Not ANSI C or C++. */
-
-# define __P(args) () /* No prototypes. */
-# define __PMT(args) ()
-# define __const /* No ANSI C keywords. */
-# define __signed
-# define __volatile
-# define __DOTS
+# define __THROW
+# define __P(args) args
+# define __PMT(args) args
-# endif /* ANSI C or C++. */
+# 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. */
-#if defined __STDC__ && __STDC__
-
-# define __CONCAT(x,y) x ## y
-# define __STRING(x) #x
+#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
-
-#else
-
-# define __CONCAT(x,y) x/**/y
-# define __STRING(x) "x"
-
-# define __ptr_t char *
-# define __long_double_t long double
-
-/* The BSD header files use the ANSI keywords unmodified (this means that
- old programs may lose if they use the new keywords as identifiers), but
- those names are not available under -traditional. We define them to
- their __ versions, which are taken care of above. */
-#ifdef __USE_BSD
-# define const __const
-# define signed __signed
-# define volatile __volatile
-#endif
-
-#endif /* __STDC__ */
+#define __ptr_t void *
+#define __long_double_t long double
/* C++ needs to know that types and declarations are C, not C++. */
# define __END_DECLS
#endif
+
+/* Support for bounded pointers. */
+#ifndef __BOUNDED_POINTERS__
+# define __bounded /* nothing */
+# define __unbounded /* nothing */
+# define __ptrvalue /* nothing */
+#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
semantics, but it's the best we can do).
Example:
- int __REDIRECT(setpgrp, __P((__pid_t pid, __pid_t pgrp)), setpgid); */
+ int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid); */
#if defined __GNUC__ && __GNUC__ >= 2
/*
#elif __SOME_OTHER_COMPILER__
-# define __attribute__(xyz)
# define __REDIRECT(name, proto, alias) name proto; \
_Pragma("let " #name " = " #alias)
*/
`__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 __attribute_malloc__ /* Ignore */
+#endif
-# define __attribute__(xyz) /* Ignore. */
+/* 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
+/* 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 __GNUC_PREREQ (2,8)
+# define __attribute_format_arg__(x) __attribute__ ((__format_arg__ (x)))
+#else
+# define __attribute_format_arg__(x) /* 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 !defined __GNUC__ || __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 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
-/* No current version of gcc knows the `restrict' keyword. Define it
- for now unconditionally to the empty string. */
-#define __restrict
+/* ISO C99 also allows to declare arrays as non-overlapping. The syntax is
+ array_name[restrict]
+ But gcc so far does not support this syntax. We define a separate macro
+ for this which can be enabled if the underlying compiler supports it. */
+#define __restrict_arr
#endif /* sys/cdefs.h */
projects / thirdparty / glibc.git / blobdiff