validation/preprocessor/has-builtin.c

   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  */