passing arguments to a Make file using perl script

[rockzzz]

Hi Guys
I am a beginner to perl. i have a make file which takes arguments and creates a exe file but I wonder how could i pass arguments to the makefile

I found a small snippet of code. could someone help me in explaining me how did it do

 
       $gmakeopt;
       $outputdir .= "_$random_seed" if($random_seed ne "none");
           unless (-d $outputdir) {
       mkdir($outputdir, 0777);
    }
 
    if($random_seed ne "none")
    {
        system "gmake RANDOM_SEED=$random_seed $gmakeopt";
    }
    else
    {
        system "gmake $gmakeopt";
    }