What I meant was there is a problem with the compiler tools on your system. The error is happening to a source code that is part of the PHP package, not LiteSpeed.
Our wiki is designed to work on almost all unix based systems but we cannot control the version of tools used on different oses. Some os distributions contains too "new" or too "old" compiler tools that break the process.
Try to compile something with your PHP code, minus LiteSpeed module and see if that works.
Just do "../configure" and "make all". See if those 2 work.