True servers are running Linux but developers may run Windows in dev environment :p
Thank you for your answer, I will try your extension in prod server once the development of the project I'm going to start will be ready.
It uses icicle with websocket packages to handle async PHP tasks and the lib owner highly recommend the use of pecl-ev extension.
Unfortunately I am quite busy those days, did you try other Microsoft Visual Studio version to compile? Normally it should be the same version as the one used to build the PHP version. Anyway thanks for working on a Windows support.
I don't know why PECL's remote server fails to compile it: http://windows.php.net/downloads/pecl/releases/ev/1.0.0rc9/logs/
I've managed to build PHP7 version successfully on my local Windows 7, x86, MSVC14. Now I don't feel like proceeding - the whole thing on Windows rather looks like dancing with a tambourine, just like good old school days, huh.