Author Name: John Dickol
Original Redmine Issue: 298 from https://www.veripool.org
Original Date: 2010-11-01
Original Assignee: Wilson Snyder (@wsnyder)

Environment variables are not being expanded when I use them in a file read in with -f. The problem appears to be due to Getopt::Long calling the subroutine associated with "<>" with a object reference, not a string for the unrecognised parameter. (See http://search.cpan.org/~jv/Getopt-Long-2.38/lib/Getopt/Long.pm#Argument_callback ) This object doesn't work as expected in the regular expression in sub file_substitute in Verilog/Getopt.pm.

To fix it: double quote the $param variable before pushing it onto the @opt_files array in vhier (and vppreproc, etc.)

sub parameter {
     my $param = shift;
     if ($param =~ /^--?/) {
         die "%Error: vhier: Unknown parameter: $param\n";
     } else {
         #push @opt_files, $param;
         push @opt_files, "$param";
     }
}