+# Need at least 2.64 for PACKAGE_URL
+AC_PREREQ([2.64])
AC_INIT(darkstat, 3.0.0-git, , , http://unix4lyfe.org/darkstat/)
AC_CONFIG_SRCDIR([darkstat.c])
AC_CONFIG_HEADER([config.h])
AC_CHECK_HEADERS(sys/filio.h)
# This is the modern way. Older systems use the ioctl method.
-AC_CHECK_HEADERS(ifaddrs.h)
+AC_SEARCH_LIBS(getifaddrs, [c],
+ [AC_CHECK_HEADERS(ifaddrs.h)])
+
+
# Some OSes (Solaris) need sys/sockio.h for SIOCGIFADDR
AC_CHECK_HEADERS(sys/sockio.h)