#!/usr/local/bin/perl -w use strict; open (FILE_MAKE_ERR, "make.err"); while(my $line = ) {   if($line =~ /(ERROR|error)/ && $line !~ /errors/)   {       $line =~ / (ERROR|error)\s+in\s+(\w+)\s+/;       $line = $2;       print "$line\n";   } }