echo 'const int main[]={1208,114434,2370306048,2101,834048,84869120,1818577091,1461743468,1684828783,10};'|cc -xc -ot -&&./t
The trick is to use retq instead of a sys call to exit and to strip some of the code that the compiler create when you call a function (pushq %rpb; moveq %rsp, %rbp; movl $0x0, eax;)
