AC_DEFUN([PECL_CHECK_LIBEVENT], [
	PECL_CHECK_PKGCONFIG(libevent, [$1])
	PECL_HAVE_VERSION(libevent, 2.0, [
		PECL_DEFINE([HAVE_LIBEVENT2])
	])
	ifelse([$2],,,[PECL_HAVE_VERSION(libevent, [$2])])
	AC_CHECK_FUNC(event_base_new,,[
		AC_DEFINE([event_base_new], [event_init], [missing event_base_new() in libevent1])
	])
	AC_CHECK_FUNC(event_assign,,[
		AC_DEFINE([event_assign(e, b, s, a, cb, d)], [do {\
			event_set(e, s, a, cb, d); \
			event_base_set(b, e);\
		} while(0)], [missing event_assign() in libevent1])
	])
])