linux-kernel - [PATCH] kbuild: fix warning "overriding recipe for target 'Makefile'"

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Date:   Tue, 26 Mar 2019 15:32:16 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-kbuild@...r.kernel.org
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] kbuild: fix warning "overriding recipe for target 'Makefile'"

If you do "make Makefile" with GNU Make 3.x, the following warning
is displayed:

  $ make Makefile
  Makefile:165: warning: overriding recipe for target 'Makefile'
  Makefile:51: warning: ignoring old recipe for target 'Makefile'
  make[1]: Nothing to be done for 'Makefile'.
  make: Nothing to be done for 'Makefile'.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

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

diff --git a/Makefile b/Makefile
index 70fc778..1b361bd 100644
--- a/Makefile
+++ b/Makefile
@@ -161,7 +161,7 @@ ifeq ($(need-sub-make),1)
 
 PHONY += $(MAKECMDGOALS) sub-make
 
-$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
+$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
 	@:
 
 # Invoke a second make in the output directory, passing relevant variables
-- 
2.7.4