Compatibility library for extensions

Hi, Some of you may be interested by a project I just released at https://github.com/flaupretre/pecl-compat. This is a compatibility library. The objective is to minimize the pain of making a PHP extension compatible with both PHP 5 and 7, while allowing to keep a single code tree. Of course, it does not bring solutions to every cases you may encounter and some 'ifdef' will still remain, but it solves a lot of issues, especially related to changes in zend_string and zend_hash, which were the most annoying in my case. For an example of an extension using this compatibility layer, look at https://github.com/flaupretre/pecl-pcs. Feel free to comment, test, and suggest improvements. Regards François