I am trying to compare options that can be entered on the command line for my program. for option f a user can enter c or b.

```c
int main(int argc, char** argv){
    char *i;
    char *o;
    char *f;
    int c;
    while ((c = getopt (argc, argv, "i:o:f")) != -1)
        switch (c)
        {
            case 'i':
              i = optarg;
              break;
            case 'o':
              o = optarg;
              break;
            case 'f':
              f = optarg;
              break;
        }
    if(strcmp(f, "b") == 0){
        //execute code
    }
}

```

When I run this I get the following error:

```
Program received signal SIGSEGV, Segmentation fault.

__strcmp_avx2 () at ../sysdeps/x86_64/multiarch/strcmp-avx2.S:115

115 ../sysdeps/x86_64/multiarch/strcmp-avx2.S: No such file or directory.

```

Edit: I'm using Linux and running

```bash
gcc -g program.c program
gdb --args ./program -f b

```