1 #ifndef __has_builtin 2 __has_builtin()??? Quesako? 3 #define __has_builtin(x) 0 4 #else 5 "has __has_builtin(), yeah!" 6 #endif 7 8 #if __has_builtin(nothing) 9 #error "not a builtin!" 10 #endif 11 12 #if __has_builtin(__builtin_offsetof) \ 13 || __has_builtin(__builtin_types_compatible_p) 14 #error "builtin ops are not builtin functions!" 15 #endif 16 17 #if __has_builtin(__builtin_va_list) \ 18 || __has_builtin(__builtin_ms_va_list) 19 #error "builtin types are not builtin functions!" 20 #endif 21 22 #if __has_builtin(__builtin_abs) 23 abs 24 #endif 25 26 #if __has_builtin(__builtin_constant_p) 27 constant_p 28 #endif 29 30 123 __has_builtin(abc) def 31 32 /* 33 * check-name: has-builtin 34 * check-command: sparse -E $file 35 * 36 * check-output-start 37 38 "has __has_builtin(), yeah!" 39 abs 40 constant_p 41 123 0 def 42 * check-output-end 43 */ 44