#!/usr/bin/perl
use warnings;
use strict;

my %versions;

while (my $line = <DATA>)
{
   next if $line =~ /^\s*$/; #skip blank lines
   $line =~ s/\s*$//;
     
   my ($name, $version, $platform) = 
       $line =~ /^([a-zA-Z-]+)-([\d\._-]+)\.(.*)$/;
   
   # set a default value if needed.
   $versions{"$name:$platform"} //= "0.0.0-0";
      
   if (cmp_verA2B ($versions{"$name:$platform"}, $version)<0) 
   {                                                        
      $versions{"$name:$platform"} = $version;
   }
}

foreach my $version (sort keys %versions) #print results
{
   my $max_ver = $versions{$version};
   my ($prefix,$suffix) =split ':', $version;
   print "$prefix\-$max_ver\.$suffix\n";
}

sub cmp_verA2B
{
  my ($verA, $verB) = @_; 
  
  my ($majorA,$minorA,$subVerA) = split /\./,$verA;
  my ($majorB,$minorB,$subVerB) = split /\./,$verB;
  my ($subVerA1, $subVerA2) = split ('-',$subVerA);
  my ($subVerB1, $subVerB2) = split ('-',$subVerB);
  
     $majorA <=> $majorB
              or
     $minorA <=> $minorB
              or
     $subVerA1 <=> $subVerB1
               or
     $subVerA2 <=> $subVerB2
}

=Prints:
abc-4.2.11-8.el7_2.x86_64
samba-common-libs-4.2.12-7.el7_2.x86_64
xyz-libs-4.2.13-7.el7_2.x86_64
=cut


__DATA__
samba-common-libs-4.2.12-7.el7_2.x86_64
samba-common-libs-4.2.10-3.el7_2.x86_64
xyz-libs-4.2.10-7.el7_2.x86_64
samba-common-libs-4.2.10-6.el7_2.x86_64
abc-4.2.11-7.el7_2.x86_64
xyz-libs-4.2.11-7.el7_2.x86_64
abc-4.2.11-8.el7_2.x86_64
samba-common-libs-4.2.10-6.2.el7_2.x86_64
xyz-libs-4.2.12-7.el7_2.x86_64
xyz-libs-4.2.13-7.el7_2.x86_64
samba-common-libs-4.2.10-8.el7_2.x86_64