linux-kernel - [PATCH 3/6] ARC: build: add boot

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Date:   Sun, 22 Nov 2020 04:36:54 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Vineet Gupta <vgupta@...opsys.com>,
        linux-snps-arc@...ts.infradead.org
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/6] ARC: build: add boot_targets to PHONY

The top-level boot_targets (uImage and uImage.*) should be phony
targets. They just let Kbuild descend into arch/arc/boot/ and create
files there.

If a file exists in the top directory with the same name, the boot
image will not be created.

You can confirm it by the following steps:

  $ export CROSS_COMPILE=<your-arc-compiler-prefix>
  $ make -s ARCH=arc defconfig all   # vmlinux will be built
  $ touch uImage.gz
  $ make ARCH=arc uImage.gz
  CALL    scripts/atomic/check-atomics.sh
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  # arch/arc/boot/uImage.gz is not created

Specify the targets as PHONY to fix this.

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

 arch/arc/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index 61a41123ad4c..cf9da9aea12a 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -104,6 +104,7 @@ boot		:= arch/arc/boot
 
 boot_targets := uImage uImage.bin uImage.gz uImage.lzma
 
+PHONY += $(boot_targets)
 $(boot_targets): vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 
-- 
2.25.1