C :: Declaring Array Within Function Argument

I have a function

Code:

int exec_program(char * arguments[])
{
...
}

I can call it like this without a problem:

Code: char * uselessvariable[] = {"/bin/echo", "Testing", NULL};exec_program(uselessvariable);

However I get an error if I try to compile it like this:

Code: exec_program({"/bin/echo", "Testing", NULL});

How, in c, I can put this array inside of the argument in one line without having to name a new variable name?