You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: compile_mex.m
    path of file: ./repos/toolkit-legacy/utilities
    
    the code of the file until where you have to start completion: function [success] = compile_mex(name, files, includes, directory, varargin)
% compile_mex Compile given source files to a MEX function
%
% Compiles or recompiles given source files to a MEX function taking
% into account source files timestamps. Also works in Octave by switching
% to mkoctfile command.
%
% Input:
% - name (string): Name of MEX function.

    
function [success] = compile_mex(name, files, includes, directory, varargin)
% compile_mex Compile given source files to a MEX function
%
% Compiles or recompiles given source files to a MEX function taking
% into account source files timestamps. Also works in Octave by switching
% to mkoctfile command.
%
% Input:
% - name (string): Name of MEX function.
% - files (cell array): Array of source files.
% - includes (cell array): Optional array of include directories.
% - directory (string): Optional path of target directory.
%
% Output:
% - success (boolean): True if successful.
%

    function datenum = file_timestamp(filename)
        if ~exist(filename, 'file')
            datenum = 0;
            return;
        end