BUILD_BUG_ON
#define BUILD_BUG_ON(condition) \
#define BUILD_BUG_ON(condition) \
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
#define BUILD_BUG_ON(e) ((void)(sizeof(struct { int:(-!!(e)); })))
#define BUILD_BUG_ON(x)