#define I (__extension__ 1.0iF) #define Pi 3.1415927f struct __attribute__((scalar_storage_order("little-endian"))) R1 { _Complex float F; }; struct __attribute__((scalar_storage_order("big-endian"))) R2 { _Complex float F; }; struct R1 My_R1 = { Pi - Pi * I }; struct R2 My_R2 = { Pi - Pi * I };