Doxygen not documenting main function in main.cpp

I have a main.cpp that contains a struct, some global constants and a main function.

I ran doxygen and the only documentation I am getting in the output index.html is for my struct.

I want doxygen to document into that index.html file my main() as well. What am I doing incorrectly?

    /// Definition of Pi
    const auto Pi = 3.141592653589793238462643383279502884197169399;

    /// \struct myStruc
    /// \brief myStruc description
    ///
    struct myStruc
    {
         /// Comments inside myStruc
    };

    /// \file

    /// \brief  Main function
    /// \param  argc An integer argument count of the command line arguments
    /// \param  argv An argument vector of the command line arguments
    /// \return an integer 0 upon exit success
    int main(int argc, char** argv)
    {
        /// Comments I would like to be documented in as well
        return 0;
    }