1 // There were two related problems here, depending on the vintage. At 2 // one time: 3 // 4 // typedef struct A { ... } A __attribute__ ((aligned (16))); 5 // 6 // would cause original_types to go into an infinite loop. At other 7 // times, the attributes applied to an explicit typedef would be lost 8 // (check_b3 would have a negative size). 9 10 // First check that the declaration is accepted and has an effect. 11 typedef struct A { int i; } A __attribute__ ((aligned (16))); 12 int check_A[__alignof__ (A) >= 16 ? 1 : -1]; 13 14 // Check that the alignment is only applied to the typedef. 15 struct B { int i; }; 16 struct B b1; 17 typedef struct B B __attribute__((aligned (16))); 18 struct B b2; 19 B b3; 20 int check_b1[__alignof__ (b1) == __alignof__ (b2) ? 1 : -1]; 21 int check_b3[__alignof__ (b3) >= 16 ? 1 : -1]; 22