kit

kit
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attr_p2_02_packed_member_offset.c (212B)

      1 /* Phase 2: packed struct → offsetof(S, b) == 1.
      2  * Unpacked offset would be 4. */
      3 struct __attribute__((packed)) S {
      4   char a;
      5   int b;
      6 };
      7 
      8 int test_main(void) { return (int)__builtin_offsetof(struct S, b); }