i386 is little-endian.
m68k is big-endian (most significant byte comes first)
int is_big_endian(void)
{
union {
uint32_t i;
uint8_t c[4];
} e = { 0x01000000 };
return e.c[0];
}
int main(void)
{
printf("System is %s-endian.\n", is_big_endian()?"big":"little");
return 0;
}