https://bugs.gentoo.org/729734

--- a/libmt_client.m4
+++ b/libmt_client.m4
@@ -9,10 +9,10 @@ AC_DEFUN([AM_LIB_MT_CLIENT],
   --with-libmt_client   path to libmt_client libraries,
       [ 
       	LIBMT_CFLAGS="-I${withval}/include"
-      	LIBMT_LIBS="-L${withval}/lib -lmt_client"
+      	LIBMT_LIBS="-L${withval}/${libdir} -lmt_client"
 	 ],[ 
-      	LIBMT_CFLAGS="-I/usr/local/include -I/usr/include"
-      	LIBMT_LIBS="-L/usr/local/lib -L/usr/lib -lmt_client"
+      	LIBMT_CFLAGS="-I/usr/include"
+      	LIBMT_LIBS="-L${libdir} -lmt_client"
 	 ])
  ac_save_CPPFLAGS="$CPPFLAGS"
  ac_save_CFLAGS="$CFLAGS"