include/sys/cdefs.h needs updating for GCC 4.x

[psmedley]

With the included cdefs.h, GCC 4.x breaks when building the JS code in mozilla with an error 'error: array bound is not an integer constant'

The problem comes from mozilla includes that use offsetof

cdefs.h needs to be updated for GCC 4.x, the following diff based on updated BSD headers fixes the problem:

--- u:\usr\include\sys\cdefs.h 2009-01-18 18:54:06.000000000 +0945 +++ u:\usr\local432\include\sys\cdefs.h 2009-01-18 18:55:24.000000000 +0945 @@ -251,9 +251,21 @@

• We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
• require it. */

-#define offsetof(type, field) ((size_t)(&((type *)0)->field)) -#define rangeof(type, start, end) \

• (offsetof(type, end) - offsetof(type, start))

+#if GNUC_PREREQ(4, 1) +#define offsetof(type, field) builtin_offsetof(type, field) +#else +#ifndef cplusplus +#define offsetof(type, field) ((size_t)(&((type *)0)->field)) +#else +#define offsetof(type, field) \ + (offsetof (reinterpret_cast <size_t> \ + (&reinterpret_cast <const volatile char &> \ + (static_cast<type *> (0)->field)))) +#endif +#endif +#define rangeof(type, start, end) \ + (offsetof(type, end) - offsetof(type, start)) +

/*

• Compiler-dependent macros to declare that functions take printf-like

[psmedley]

cdefs.h diff