title: Cross platform file compression
body: <p>We need a cross platform solution for compressing files.  Our server runs on Windows XP/Vista/7 and 3 Unix distros, SunOS, HPUX, and AIX.  Our server creates files that needed to be zipped before being set back to the client.  Our initial thought was to compress the files with jar, as most of the servers have java installed, but apparently jar isn't included in the jre, just the jdk.  Our server is written in C and the application that needs to create a compressed file is Perl.</p>
  
  <p>I'd really like something I don't have install as our install base is LARGE and adding new required applications is generally difficult.  Is there anything that is guaranteed to be built into each of those OSes that I could use for zipping?  Even if I have to use something different for each, that would probably be okay also.</p>