OK, here is a problem. I wanted to play a little bit with uploadprogress PECL extension. Normally installation of PECL extension is very easy, you just do
$cd /opt/lampp
$sudo ./bin/pecl install uploadprogress
form console and PECL installer would do the rest, which was my case also - extension was downloaded from Internet and compiled successfully. After adding extension="uploadprogress.so" to php.ini and restarting XAMPP I've got next error