Compiler/TM4C123GH6PZ: how to declare a packed struct in tivac?

Tool/software: TI C/C++ Compiler

how to declare a packed struct in tivac?

like:

struct __packed struct {

uint8_t data0;
uint8_t data1; 
uint32_t data2; 
uint8_t data5;
uint8_t data6[8]; 
uint8_t data7;
};

thanks