title: GCC plugin architecture and GPL
body: <p>I am trying to do build a plugin to gcc (possible with version 4.5) onwards. I wish to deliver this plugin to a customer along with some software in source code form. This source code can be compiled by any GCC, when the aforementioned plugin is provided.</p>
  
  <p>It says that the plugin has to be under GPL. I am not selling GCC, but the software. Do I have to send the source code of plugin to the customer? Is it enforced in GPL?</p>