$NetBSD$

--- configure.ac.orig	2015-10-27 21:04:21.000000000 +0000
+++ configure.ac
@@ -12,6 +12,7 @@ AC_CONFIG_SRCDIR(src/cairo.h)
 AC_CONFIG_HEADERS(config.h)
 
 AC_CHECK_HEADERS([unistd.h sys/ioctl.h])
+AC_C_TYPEOF
 
 AM_INIT_AUTOMAKE([1.11 foreign -Wall no-define no-dist-gzip dist-xz])
 AM_SILENT_RULES([yes])