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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 AC_CHECK_DECL BUG in Autoconf--please report AC_CHECK_HEADERS BUG in Autoconf--please report AC_DEFINE BUG in Autoconf--please report AC_CHECK_DECL BUG in Autoconf--please report AC_CHECK_HEADERS BUG in Autoconf--please report AC_DEFINE BUG in Autoconf--please report AC_CHECK_DECL BUG in Autoconf--please report AC_CHECK_HEADERS BUG in Autoconf--please report AC_DEFINE

What is this?