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    Subject[PATCH 3/6] ARC: build: add boot_targets to PHONY
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    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@kernel.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
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