From 22ceb7401b8581439b21c8cbfe7e1410bfc37634 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=98yvind=20Harboe?= <oyvind.harboe@zylin.com>
Date: Fri, 19 Jan 2024 12:24:26 +0100
Subject: [PATCH] Makefile: add print-FOO utility target that prints the value
 of a make variable
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useful for debugging/checking value of a variable

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
---
 common.mk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/common.mk b/common.mk
index 3763584f..462f1945 100644
--- a/common.mk
+++ b/common.mk
@@ -469,3 +469,10 @@ check-submodule-status:
 # Disable all suffix rules to improve Make performance on systems running older
 # versions of Make
 .SUFFIXES:
+
+.PHONY: print-%
+# Print any variable and it's origin. This helps figure out where the
+# variable was defined and to distinguish between empty and undefined.
+print-%:
+	@echo "$*=$($*)"
+	@echo "Origin is: $(origin $*)"