From efe84d408bf41975db8506d3a1cc02e794e2309c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
Date: Sat, 19 Sep 2020 16:39:22 +0200
Subject: [PATCH] scripts/dtc: only append to HOST_EXTRACFLAGS instead of
 overwriting
Patch-mainline: v5.9-rc8
Git-commit: efe84d408bf41975db8506d3a1cc02e794e2309c
References: git-fixes


When building with

	$ HOST_EXTRACFLAGS=-g make

the expectation is that host tools are built with debug informations.
This however doesn't happen if the Makefile assigns a new value to the
HOST_EXTRACFLAGS instead of appending to it. So use += instead of := for
the first assignment.

Fixes: e3fd9b5384f3 ("scripts/dtc: consolidate include path options in Makefile")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Dirk Mueller <dmueller@suse.de>

---
 scripts/dtc/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/scripts/dtc/Makefile
+++ b/scripts/dtc/Makefile
@@ -9,7 +9,7 @@ dtc-objs	:= dtc.o flattree.o fstree.o da
 dtc-objs	+= dtc-lexer.lex.o dtc-parser.tab.o
 
 # Source files need to get at the userspace version of libfdt_env.h to compile
-HOST_EXTRACFLAGS := -I $(srctree)/$(src)/libfdt
+HOST_EXTRACFLAGS += -I $(srctree)/$(src)/libfdt
 
 ifeq ($(wildcard /usr/include/yaml.h),)
 ifneq ($(CHECK_DTBS),)