/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
*/
#if defined(__MWERKS__) && (__MWERKS__ > 0x2400)
/* newer Metrowerks compilers support __attribute__() */
-#elif !defined(__GNUC__) || __GNUC__ < 2 || \
- (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
+#elif __GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 5
+#define __dead2 __attribute__((__noreturn__))
+#define __pure2 __attribute__((__const__))
+#if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7
+#define __unused /* no attribute */
+#else
+#define __unused __attribute__((__unused__))
+#endif
+#else
#define __attribute__(x) /* delete __attribute__ if non-gcc or gcc1 */
#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
+/* __dead and __pure are depreciated. Use __dead2 and __pure2 instead */
#define __dead __volatile
#define __pure __const
#endif
#define __dead
#define __pure
#endif
+#ifndef __dead2
+#define __dead2
+#define __pure2
+#define __unused
+#endif
+
+/*
+ * GCC 2.95 provides `__restrict' as an extension to C90 to support the
+ * C99-specific `restrict' type qualifier. We happen to use `__restrict' as
+ * a way to define the `restrict' type qualifier without disturbing older
+ * software that is unaware of C99 keywords.
+ */
+#if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)
+#if __STDC_VERSION__ < 199901
+#define __restrict
+#else
+#define __restrict restrict
+#endif
+#endif
+
+/*
+ * Compiler-dependent macros to declare that functions take printf-like
+ * or scanf-like arguments. They are null except for versions of gcc
+ * that are known to support the features properly. Functions declared
+ * with these attributes will cause compilation warnings if there is a
+ * mismatch between the format string and subsequent function parameter
+ * types.
+ */
+#if __GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 7
+#define __printflike(fmtarg, firstvararg) \
+ __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
+#define __scanflike(fmtarg, firstvararg) \
+ __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
+#else
+#define __printflike(fmtarg, firstvararg)
+#define __scanflike(fmtarg, firstvararg)
+#endif
-#define __IDSTRING(name,string) \
- static const char name[] __attribute__((__unused__)) = string
+#define __IDSTRING(name,string) static const char name[] __unused = string
#ifndef __COPYRIGHT
#define __COPYRIGHT(s) __IDSTRING(copyright,s)
#define __PROJECT_VERSION(s) __IDSTRING(project_version,s)
#endif
+/*
+ * The __DARWIN_ALIAS macros is used to do symbol renaming,
+ * they allow old code to use the old symbol thus maintiang binary
+ * compatability while new code can use a new improved version of the
+ * same function.
+ *
+ * By default newly complied code will actually get the same symbols
+ * that the old code did. Defining any of _APPLE_C_SOURCE, _XOPEN_SOURCE,
+ * or _POSIX_C_SOURCE will give you the new symbols. Defining _XOPEN_SOURCE
+ * or _POSIX_C_SOURCE also restricts the avilable symbols to a subset of
+ * Apple's APIs.
+ *
+ * __DARWIN_ALIAS is used by itself if the function signature has not
+ * changed, it is used along with a #ifdef check for __DARWIN_UNIX03
+ * if the signature has changed. Because the __LP64__ enviroment
+ * only supports UNIX03 sementics it causes __DARWIN_UNIX03 to be
+ * defined, but causes __DARWIN_ALIAS to do no symbol mangling.
+ */
+
+#if !defined(__DARWIN_UNIX03)
+#if defined(_APPLE_C_SOURCE) || defined(_XOPEN_SOURCE) || defined(_POSIX_C_SOURCE) || defined(__LP64__)
+#if defined(_NONSTD_SOURCE)
+#error "Can't define both _NONSTD_SOURCE and any of _APPLE_C_SOURCE, _XOPEN_SOURCE, _POSIX_C_SOURCE, or __LP64__"
+#endif /* _NONSTD_SOURCE */
+#define __DARWIN_UNIX03 1
+#elif defined(_NONSTD_SOURCE)
+#define __DARWIN_UNIX03 0
+#else /* default */
+#define __DARWIN_UNIX03 0
+#endif /* _APPLE_C_SOURCE || _XOPEN_SOURCE || _POSIX_C_SOURCE || __LP64__ */
+#endif /* !__DARWIN_UNIX03 */
+
+#if __DARWIN_UNIX03 && !defined(__LP64__)
+#define __DARWIN_ALIAS(sym) __asm("_" __STRING(sym) "$UNIX2003")
+#else
+#define __DARWIN_ALIAS(sym)
+#endif
+
+
+/*
+ * POSIX.1 requires that the macros we test be defined before any standard
+ * header file is included. This permits us to convert values for feature
+ * testing, as necessary, using only _POSIX_C_SOURCE.
+ *
+ * Here's a quick run-down of the versions:
+ * defined(_POSIX_SOURCE) 1003.1-1988
+ * _POSIX_C_SOURCE == 1L 1003.1-1990
+ * _POSIX_C_SOURCE == 2L 1003.2-1992 C Language Binding Option
+ * _POSIX_C_SOURCE == 199309L 1003.1b-1993
+ * _POSIX_C_SOURCE == 199506L 1003.1c-1995, 1003.1i-1995,
+ * and the omnibus ISO/IEC 9945-1: 1996
+ * _POSIX_C_SOURCE == 200112L 1003.1-2001
+ *
+ * In addition, the X/Open Portability Guide, which is now the Single UNIX
+ * Specification, defines a feature-test macro which indicates the version of
+ * that specification, and which subsumes _POSIX_C_SOURCE.
+ */
+
+/* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1L. */
+#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1L
+#undef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 199009L
+#endif
+
+/* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2L. */
+#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2L
+#undef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 199209L
+#endif
+
+/* Deal with various X/Open Portability Guides and Single UNIX Spec. */
+#ifdef _XOPEN_SOURCE
+#if _XOPEN_SOURCE - 0L >= 600L
+#undef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 200112L
+#elif _XOPEN_SOURCE - 0L >= 500L
+#undef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 199506L
+#endif
+#endif
+
+/*
+ * Deal with all versions of POSIX. The ordering relative to the tests above is
+ * important.
+ */
+#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
+#define _POSIX_C_SOURCE 198808L
+#endif
+
+/*
+ * long long is not supported in c89 (__STRICT_ANSI__), but g++ -ansi and
+ * c99 still want long longs. While not perfect, we allow long longs for
+ * g++.
+ */
+#define __DARWIN_NO_LONG_LONG (defined(__STRICT_ANSI__) \
+ && (__STDC_VERSION__-0 < 199901L) \
+ && !defined(__GNUG__))
+
+/*
+ * Long double compatibility macro allow selecting variant symbols based
+ * on the old (compatible) 64-bit long doubles, or the new 128-bit
+ * long doubles. This applies only to ppc; i386 already has long double
+ * support, while ppc64 doesn't have any backwards history.
+ */
+#if defined(__ppc__)
+# if defined(__LDBL_MANT_DIG__) && defined(__DBL_MANT_DIG__) && \
+ __LDBL_MANT_DIG__ > __DBL_MANT_DIG__
+# if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__-0 < 1040
+# define __DARWIN_LDBL_COMPAT(x) __asm("_" __STRING(x) "$LDBLStub")
+# else
+# define __DARWIN_LDBL_COMPAT(x) __asm("_" __STRING(x) "$LDBL128")
+# endif
+# define __DARWIN_LDBL_COMPAT2(x) __asm("_" __STRING(x) "$LDBL128")
+# define __DARWIN_LONG_DOUBLE_IS_DOUBLE 0
+# else
+# define __DARWIN_LDBL_COMPAT(x) /* nothing */
+# define __DARWIN_LDBL_COMPAT2(x) /* nothing */
+# define __DARWIN_LONG_DOUBLE_IS_DOUBLE 1
+# endif
+#elif defined(__i386__) || defined(__ppc64__)
+# define __DARWIN_LDBL_COMPAT(x) /* nothing */
+# define __DARWIN_LDBL_COMPAT2(x) /* nothing */
+# define __DARWIN_LONG_DOUBLE_IS_DOUBLE 0
+#else
+# error Unknown architecture
+#endif
+
+/*
+ * Structure alignment control macros. These specify how certain
+ * shared structures should be aligned. Some may need backward
+ * compatible legacy (POWER) alignment, while others may need
+ * forward compatible (NATURAL) alignment.
+ */
+#if !defined(__DARWIN_ALIGN_POWER)
+#if defined(__ppc64__)
+#define __DARWIN_ALIGN_POWER 1
+#else
+#define __DARWIN_ALIGN_POWER 0
+#endif
+#endif /* __DARWIN_ALIGN_POWER */
+
+#if !defined(__DARWIN_ALIGN_NATURAL)
+#if defined(__ppc__) && defined(KERNEL)
+#define __DARWIN_ALIGN_NATURAL 1
+#else
+#define __DARWIN_ALIGN_NATURAL 0
+#endif
+#endif /* __DARWIN_ALIGN_NATURAL */
+
#endif /* !_CDEFS_H_ */
projects / apple / xnu.git / blobdiff