Index: tools/prettyprinter/Makefile.am
===================================================================
--- tools/prettyprinter/Makefile.am	(revision 534e4e460878f8a2e7d24b4a0413515e6acd1dae)
+++ tools/prettyprinter/Makefile.am	(revision 0c1b5660b6f5a0957c905780ecc5883a812e52a7)
@@ -1,11 +1,11 @@
 ######################## -*- Mode: Makefile-Automake -*- ######################
-## 
+##
 ## Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
 ##
 ## The contents of this file are covered under the licence agreement in the
 ## file "LICENCE" distributed with Cforall.
-## 
-## Makefile.am -- 
-## 
+##
+## Makefile.am --
+##
 ## Author           : Peter A. Buhr
 ## Created On       : Wed Jun 28 12:07:10 2017
@@ -14,4 +14,6 @@
 ## Update Count     : 20
 ###############################################################################
+
+AUTOMAKE_OPTIONS = foreign    # do not require all the GNU file names
 
 BUILT_SOURCES = parser.hh
Index: tools/prettyprinter/Makefile.in
===================================================================
--- tools/prettyprinter/Makefile.in	(revision 534e4e460878f8a2e7d24b4a0413515e6acd1dae)
+++ tools/prettyprinter/Makefile.in	(revision 0c1b5660b6f5a0957c905780ecc5883a812e52a7)
@@ -327,4 +327,5 @@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
+AUTOMAKE_OPTIONS = foreign    # do not require all the GNU file names
 BUILT_SOURCES = parser.hh
 AM_YFLAGS = -d -t -v