1 #if defined __X32_SYSCALL_BIT && defined __NR_read \ 2 && (__X32_SYSCALL_BIT & __NR_read) == __X32_SYSCALL_BIT 3 # define SYSCALL_BIT __X32_SYSCALL_BIT 4 #else 5 # define SYSCALL_BIT 0 6 #endif 7