From cbb8c01412c9c348731c7dae38a1fafa0802dd49 Mon Sep 17 00:00:00 2001
From: Marco Vedovati <mvedovati@suse.com>
Date: Tue, 18 Jun 2019 13:25:27 +0200
Subject: [PATCH] make: add print-% target printing variable value

Add a print-% make target, to be able to retrieve the value of make
variables.
E.g. "make print-MY_MAKE_VAR MY_MAKE_VAR=1" will print "1"

Signed-off-by: Marco Vedovati <mvedovati@suse.com>
---
 Makefile | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Makefile b/Makefile
index a51dd79e8..25fb2770c 100644
--- a/Makefile
+++ b/Makefile
@@ -125,3 +125,12 @@ install-scripts:
 .PHONY: clean
 clean:
 	rm -rf $(DISTRO_ROOTFS_MARKER) $(DISTRO_ROOTFS) $(DISTRO_IMAGE) $(DISTRO_INITRD)
+
+# Prints the name of the variable passed as suffix to the print- target,
+# E.g., if Makefile contains:
+# MY_MAKE_VAR := foobar
+# Then:
+# $ make printf-MY_MAKE_VAR
+# Will print "foobar"
+print-%:
+	@echo $($*)