From 14158ad5fc38836854a1a52ed03e6174a4083a96 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@sbcglobal.net>
Date: Tue, 31 May 2016 01:23:48 -0400
Subject: Makefile: run with --warn-undefined-variables

---
 build-aux/no-builtin-variables.mk | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'build-aux/no-builtin-variables.mk')

diff --git a/build-aux/no-builtin-variables.mk b/build-aux/no-builtin-variables.mk
index c236c73..c3aef58 100644
--- a/build-aux/no-builtin-variables.mk
+++ b/build-aux/no-builtin-variables.mk
@@ -9,3 +9,7 @@ $(foreach v,$(filter-out .% MAKE% SUFFIXES,$(_default_variables))\
             $(filter .LIBPATTERNS MAKEINFO,$(_default_variables)),\
   $(eval undefine $v))
 undefine _default_variables
+
+# Because Make uses .LIBPATTERNS internally, it should always be
+# defined in case --warn-undefined-variables
+.LIBPATTERNS ?=
-- 
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