golang exec.Command无法运行C二进制文件

Question

I executing a C executable using exec.Command and exec.Start(). My C executable is in the current directory and this is my code

cmd := exec.Command("./a.out")
// stdout,err := cmd.StderrPipe()
stderr,_ := cmd.StderrPipe()

err := cmd.Start()
if err != nil {
    log.Fatal(err)
}

log.Printf("Waiting for command to finish...")
s,err := ioutil.ReadAll(stderr)
log.Printf(string(s))
err = cmd.Wait()
log.Printf("Command finished with error: %v", err)

When i run this code, this is the output i get

2014/12/10 07:49:39 Waiting for command to finish...
2014/12/10 07:49:39 Command finished with error: exit status 11

My C hello world program is

#include <stdio.h>
int main(){
printf("hello world");
}

The C code is compiled with gcc version 4.8.2 and executable is a.out.

The C executable a.out is a simple hello world program, i am getting the correct output, but i can't understand why exec.Wait() is exiting with status code 11 and not with 0.

The executable('a.out') is running normally when i run on a linux terminal without any faults or errors

Answer 1

I got the answer from github here

It is returning 11 because the output length is 11 and there is no return statement in my hello world program. So main returns from AX register when it ended.