Can't install Phalcon

Hello. I try to install Phalcon, but I got errors:

sudo ./install

Configuring for: PHP Api Version: 20090626 Zend Module Api No: 20090626 Zend Extension Api No: 220090626 autoconf: Undefined macros: BUG in Autoconf--please report ACCHECKDECL BUG in Autoconf--please report ACCHECKHEADERS BUG in Autoconf--please report ACDEFINE *BUG in Autoconf--please report* ACCHECKDECL *BUG in Autoconf--please report* ACCHECKHEADERS *BUG in Autoconf--please report* ACDEFINE BUG in Autoconf--please report ACCHECKDECL BUG in Autoconf--please report ACCHECKHEADERS BUG in Autoconf--please report AC_DEFINE

What is this?