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    Subject[PATCH 5.14 301/849] arm64: vdso32: suppress error message for make mrproper
    Date
    From: Nick Desaulniers <ndesaulniers@google.com>

    [ Upstream commit 14831fad73f5ac30ac61760487d95a538e6ab3cb ]

    When running the following command without arm-linux-gnueabi-gcc in
    one's $PATH, the following warning is observed:

    $ ARCH=arm64 CROSS_COMPILE_COMPAT=arm-linux-gnueabi- make -j72 LLVM=1 mrproper
    make[1]: arm-linux-gnueabi-gcc: No such file or directory

    This is because KCONFIG is not run for mrproper, so CONFIG_CC_IS_CLANG
    is not set, and we end up eagerly evaluating various variables that try
    to invoke CC_COMPAT.

    This is a similar problem to what was observed in
    commit dc960bfeedb0 ("h8300: suppress error messages for 'make clean'")

    Reported-by: Lucas Henneman <henneman@google.com>
    Suggested-by: Masahiro Yamada <masahiroy@kernel.org>
    Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
    Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
    Reviewed-by: Nathan Chancellor <nathan@kernel.org>
    Tested-by: Nathan Chancellor <nathan@kernel.org>
    Link: https://lore.kernel.org/r/20211019223646.1146945-4-ndesaulniers@google.com
    Signed-off-by: Will Deacon <will@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/arm64/kernel/vdso32/Makefile | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
    index 3dba0c4f8f42b..764d1900d5aab 100644
    --- a/arch/arm64/kernel/vdso32/Makefile
    +++ b/arch/arm64/kernel/vdso32/Makefile
    @@ -40,7 +40,8 @@ cc32-as-instr = $(call try-run,\
    # As a result we set our own flags here.

    # KBUILD_CPPFLAGS and NOSTDINC_FLAGS from top-level Makefile
    -VDSO_CPPFLAGS := -DBUILD_VDSO -D__KERNEL__ -nostdinc -isystem $(shell $(CC_COMPAT) -print-file-name=include)
    +VDSO_CPPFLAGS := -DBUILD_VDSO -D__KERNEL__ -nostdinc
    +VDSO_CPPFLAGS += -isystem $(shell $(CC_COMPAT) -print-file-name=include 2>/dev/null)
    VDSO_CPPFLAGS += $(LINUXINCLUDE)

    # Common C and assembly flags
    --
    2.33.0


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