--- configure.ac.orig	2017-12-23 08:35:07.079096342 +0000
+++ configure.ac	2017-12-23 08:35:36.903643912 +0000
@@ -7,6 +7,9 @@
 AC_GNU_SOURCE
 AC_CONFIG_HEADERS([config.h])
 
+# avoid rebuilding documentation
+AM_MAINTAINER_MODE
+
 ##########################################################################
 #
 # Try to figure out if we are building from git sources.