---- libsndfile-1.0.20/M4/octave.m4.orig 2009-10-25 15:51:00.461732576 +0100
-+++ libsndfile-1.0.20/M4/octave.m4 2009-10-25 15:51:32.459533439 +0100
+--- libsndfile-1.0.26/M4/octave.m4.orig 2015-11-25 21:57:25.675180371 +0100
++++ libsndfile-1.0.26/M4/octave.m4 2015-11-26 15:46:34.252488392 +0100
@@ -119,7 +119,7 @@
2.*)
AC_MSG_WARN([Octave version 2.X is not supported.])
;;
-- 3.0.*)
+- 3.*)
+ 3.*|4.*)
OCTAVE_DEST_ODIR=`$OCTAVE_CONFIG --oct-site-dir | sed 's%^/usr%${prefix}%'`
OCTAVE_DEST_MDIR=`$OCTAVE_CONFIG --m-site-dir | sed 's%^/usr%${prefix}%'`