Remove some <sys/cdefs.h> cruft.
In particular, we don't need to record the peculiarities of every
version of GCC ever shipped. It just makes this file harder to follow.
Change-Id: Ie9035d78eae86b4aed9dff3576c6f54e268aaced
diff --git a/libc/include/sys/cdefs.h b/libc/include/sys/cdefs.h
index 3ad4f42..58038cd 100644
--- a/libc/include/sys/cdefs.h
+++ b/libc/include/sys/cdefs.h
@@ -130,30 +130,9 @@
#define __volatile
#endif /* !__GNUC__ */
-/*
- * In non-ANSI C environments, new programs will want ANSI-only C keywords
- * deleted from the program and old programs will want them left alone.
- * Programs using the ANSI C keywords const, inline etc. as normal
- * identifiers should define -DNO_ANSI_KEYWORDS.
- */
-#ifndef NO_ANSI_KEYWORDS
-#define const __const /* convert ANSI C keywords */
-#define inline __inline
-#define signed __signed
-#define volatile __volatile
-#endif /* !NO_ANSI_KEYWORDS */
#endif /* !(__STDC__ || __cplusplus) */
/*
- * Used for internal auditing of the NetBSD source tree.
- */
-#ifdef __AUDIT__
-#define __aconst __const
-#else
-#define __aconst
-#endif
-
-/*
* The following macro is used to remove const cast-away warnings
* from gcc -Wcast-qual; it should be used with caution because it
* can hide valid errors; in particular most valid uses are in
@@ -164,75 +143,19 @@
*/
#define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
-/*
- * GCC2 provides __extension__ to suppress warnings for various GNU C
- * language extensions under "-ansi -pedantic".
- */
-#if !__GNUC_PREREQ(2, 0)
-#define __extension__ /* delete __extension__ if non-gcc or gcc1 */
-#endif
-
-/*
- * GCC1 and some versions of GCC2 declare dead (non-returning) and
- * pure (no side effects) functions using "volatile" and "const";
- * unfortunately, these then cause warnings under "-ansi -pedantic".
- * GCC2 uses a new, peculiar __attribute__((attrs)) style. All of
- * these work for GNU C++ (modulo a slight glitch in the C++ grammar
- * in the distribution version of 2.5.5).
- */
-#if !__GNUC_PREREQ(2, 5)
-#define __attribute__(x) /* delete __attribute__ if non-gcc or gcc1 */
-#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
-#define __dead __volatile
-#define __pure __const
-#endif
-#endif
-
-/* Delete pseudo-keywords wherever they are not available or needed. */
-#ifndef __dead
-#define __dead
-#define __pure
-#endif
-
-#if __GNUC_PREREQ(2, 7)
-#define __unused __attribute__((__unused__))
-#else
-#define __unused /* delete */
-#endif
-
+#define __dead __attribute__((__noreturn__))
+#define __pure __attribute__((__const__))
#define __pure2 __attribute__((__const__)) /* Android-added: used by FreeBSD libm */
-#if __GNUC_PREREQ(3, 1)
-#define __used __attribute__((__used__))
-#else
-#define __used /* delete */
-#endif
+#define __unused __attribute__((__unused__))
-#if __GNUC_PREREQ(2, 7)
+#define __used __attribute__((__used__))
+
#define __packed __attribute__((__packed__))
#define __aligned(x) __attribute__((__aligned__(x)))
#define __section(x) __attribute__((__section__(x)))
-#elif defined(__lint__)
-#define __packed /* delete */
-#define __aligned(x) /* delete */
-#define __section(x) /* delete */
-#else
-#define __packed error: no __packed for this compiler
-#define __aligned(x) error: no __aligned for this compiler
-#define __section(x) error: no __section for this compiler
-#endif
-#if !__GNUC_PREREQ(2, 8)
-#define __extension__
-#endif
-
-#if __GNUC_PREREQ(2, 8)
#define __statement(x) __extension__(x)
-#elif defined(lint)
-#define __statement(x) (0)
-#else
-#define __statement(x) (x)
-#endif
#define __nonnull(args) __attribute__((__nonnull__ args))
@@ -240,43 +163,20 @@
#define __scanflike(x, y) __attribute__((__format__(scanf, x, y))) __nonnull((x))
/*
- * C99 defines the restrict type qualifier keyword, which was made available
- * in GCC 2.92.
+ * C99 defines the restrict type qualifier keyword.
*/
#if defined(__STDC__VERSION__) && __STDC_VERSION__ >= 199901L
#define __restrict restrict
-#else
-#if !__GNUC_PREREQ(2, 92)
-#define __restrict /* delete __restrict when not supported */
-#endif
#endif
/*
- * C99 defines __func__ predefined identifier, which was made available
- * in GCC 2.95.
+ * C99 defines __func__ predefined identifier.
*/
#if !defined(__STDC_VERSION__) || !(__STDC_VERSION__ >= 199901L)
-#if __GNUC_PREREQ(2, 6)
#define __func__ __PRETTY_FUNCTION__
-#elif __GNUC_PREREQ(2, 4)
-#define __func__ __FUNCTION__
-#else
-#define __func__ ""
-#endif
#endif /* !(__STDC_VERSION__ >= 199901L) */
/*
- * A barrier to stop the optimizer from moving code or assume live
- * register values. This is gcc specific, the version is more or less
- * arbitrary, might work with older compilers.
- */
-#if __GNUC_PREREQ(2, 95)
-#define __insn_barrier() __asm __volatile("":::"memory")
-#else
-#define __insn_barrier() /* */
-#endif
-
-/*
* GNU C version 2.96 adds explicit branch prediction so that
* the CPU back-end can hint the processor and also so that
* code blocks can be reordered such that the predicted path
@@ -304,43 +204,19 @@
* basic block reordering that this affects can often generate
* larger code.
*/
-#if __GNUC_PREREQ(2, 96)
#define __predict_true(exp) __builtin_expect((exp) != 0, 1)
#define __predict_false(exp) __builtin_expect((exp) != 0, 0)
-#else
-#define __predict_true(exp) (exp)
-#define __predict_false(exp) (exp)
-#endif
-#if __GNUC_PREREQ(2, 96)
#define __noreturn __attribute__((__noreturn__))
#define __mallocfunc __attribute__((malloc))
#define __purefunc __attribute__((pure))
-#else
-#define __noreturn
-#define __mallocfunc
-#define __purefunc
-#endif
-#if __GNUC_PREREQ(3, 1)
#define __always_inline __attribute__((__always_inline__))
-#else
-#define __always_inline
-#endif
-#if __GNUC_PREREQ(3, 4)
#define __wur __attribute__((__warn_unused_result__))
-#else
-#define __wur
-#endif
-#if __GNUC_PREREQ(4, 3)
#define __errorattr(msg) __attribute__((__error__(msg)))
#define __warnattr(msg) __attribute__((__warning__(msg)))
-#else
-#define __errorattr(msg)
-#define __warnattr(msg)
-#endif
#define __errordecl(name, msg) extern void name(void) __errorattr(msg)
@@ -540,19 +416,14 @@
* http://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html for details.
*/
#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
-#define __BIONIC_FORTIFY 1
-#if _FORTIFY_SOURCE == 2
-#define __bos(s) __builtin_object_size((s), 1)
-#else
-#define __bos(s) __builtin_object_size((s), 0)
-#endif
-#define __bos0(s) __builtin_object_size((s), 0)
-
-#if __GNUC_PREREQ(4,3) || __has_attribute(__artificial__)
-#define __BIONIC_FORTIFY_INLINE extern __inline__ __always_inline __attribute__((gnu_inline)) __attribute__((__artificial__))
-#else
-#define __BIONIC_FORTIFY_INLINE extern __inline__ __always_inline __attribute__((gnu_inline))
-#endif
+# define __BIONIC_FORTIFY 1
+# if _FORTIFY_SOURCE == 2
+# define __bos(s) __builtin_object_size((s), 1)
+# else
+# define __bos(s) __builtin_object_size((s), 0)
+# endif
+# define __bos0(s) __builtin_object_size((s), 0)
+# define __BIONIC_FORTIFY_INLINE extern __inline__ __always_inline __attribute__((gnu_inline)) __attribute__((__artificial__))
#endif
#define __BIONIC_FORTIFY_UNKNOWN_SIZE ((size_t) -1)