linux-kernel - [PATCH] kbuild: reuse this-makefile to define abs

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Message-Id: <20210221165019.293769-1-masahiroy@kernel.org>
Date:   Mon, 22 Feb 2021 01:50:19 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: [PATCH] kbuild: reuse this-makefile to define abs_srctree

Move this-makefile up, and reuse it to define abs_srctree.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 Makefile | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index ade44ac4cc2f..b127881e6bf0 100644
--- a/Makefile
+++ b/Makefile
@@ -145,7 +145,8 @@ else
 need-sub-make := 1
 endif
 
-abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
+this-makefile := $(lastword $(MAKEFILE_LIST))
+abs_srctree := $(realpath $(dir $(this-makefile)))
 
 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
 $(error source directory cannot contain spaces or colons)
@@ -160,8 +161,6 @@ MAKEFLAGS += --include-dir=$(abs_srctree)
 need-sub-make := 1
 endif
 
-this-makefile := $(lastword $(MAKEFILE_LIST))
-
 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
-- 
2.27.0