Merge "compiler.h: give up __compiletime_assert_fallback()"

#endif

#ifndef __compiletime_error

# define __compiletime_error(message)

/*

 * Sparse complains of variable sized arrays due to the temporary variable in

 * __compiletime_assert. Unfortunately we can't just expand it out to make

 * sparse see a constant array size without breaking compiletime_assert on old

 * versions of GCC (e.g. 4.2.4), so hide the array from sparse altogether.

 */

# ifndef __CHECKER__

#  define __compiletime_error_fallback(condition) \

	do { ((void)sizeof(char[1 - 2 * condition])); } while (0)

# endif

#endif

#ifndef __compiletime_error_fallback

# define __compiletime_error_fallback(condition) do { } while (0)

#endif

#ifdef __OPTIMIZE__

# define __compiletime_assert(condition, msg, prefix, suffix)		\

	do {								\

		int __cond = !(condition);				\

		extern void prefix ## suffix(void) __compiletime_error(msg); \

		if (__cond)						\

		if (!(condition))						\

			prefix ## suffix();				\

		__compiletime_error_fallback(__cond);			\

	} while (0)

#else

# define __compiletime_assert(condition, msg, prefix, suffix) do { } while (0)