From 10f5101af3ea207e34e12af417009422777d2bcb Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Sun, 10 Oct 2010 22:40:44 +0000
Subject: [PATCH] Add two debug rules the examine the values of runtime make
 variables. Based on patch by Philip Prindeville
 <philipp@redfish-solutions.com>

SVN-Revision: 23389
---
 rules.mk | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/rules.mk b/rules.mk
index 49044c8cfb..7d3516bc42 100644
--- a/rules.mk
+++ b/rules.mk
@@ -254,4 +254,16 @@ all:
 FORCE: ;
 .PHONY: FORCE
 
+val.%:
+	@$(if $(filter undefined,$(origin $*)),\
+		echo "$* undefined" >&2, \
+		echo '$(subst ','"'"',$($*))' \
+	)
+
+var.%:
+	@$(if $(filter undefined,$(origin $*)),\
+		echo "$* undefined" >&2, \
+		echo "$*='"'$(subst ','"'\"'\"'"',$($*))'"'" \
+	)
+
 endif #__rules_inc