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  1. or download this
    my $relSourcePath;
    my $inlineCFile;
    ...
    
    $ENV{MYVAR} = "my_var_value";
    print "ENV{MYVAR} = '" . qqq("MYVAR") . "'\n";
    
  2. or download this
    char * qqq(const char *envName)
    {
        return getenv(envName);
    }