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    Subject[PATCH v4 26/26] arm64: vdso32: Enable Clang Compilation
    Date
    Enable Clang Compilation for the vdso32 library.

    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Will Deacon <will@kernel.org>
    Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
    Tested-by: Nathan Chancellor <natechancellor@gmail.com> # build
    Acked-by: Catalin Marinas <catalin.marinas@arm.com>
    Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
    ---
    arch/arm64/kernel/vdso32/Makefile | 11 +++++++++++
    1 file changed, 11 insertions(+)

    diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
    index 04df57b43cb1..3964738ebbde 100644
    --- a/arch/arm64/kernel/vdso32/Makefile
    +++ b/arch/arm64/kernel/vdso32/Makefile
    @@ -10,7 +10,18 @@ include $(srctree)/lib/vdso/Makefile

    # Same as cc-*option, but using CC_COMPAT instead of CC
    ifeq ($(CONFIG_CC_IS_CLANG), y)
    +COMPAT_GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE_COMPAT)elfedit))
    +COMPAT_GCC_TOOLCHAIN := $(realpath $(COMPAT_GCC_TOOLCHAIN_DIR)/..)
    +
    +CC_COMPAT_CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE_COMPAT:%-=%))
    +CC_COMPAT_CLANG_FLAGS += --prefix=$(COMPAT_GCC_TOOLCHAIN_DIR)
    +CC_COMPAT_CLANG_FLAGS += -no-integrated-as -Qunused-arguments
    +ifneq ($(COMPAT_GCC_TOOLCHAIN),)
    +CC_COMPAT_CLANG_FLAGS += --gcc-toolchain=$(COMPAT_GCC_TOOLCHAIN)
    +endif
    +
    CC_COMPAT ?= $(CC)
    +CC_COMPAT += $(CC_COMPAT_CLANG_FLAGS)
    else
    CC_COMPAT ?= $(CROSS_COMPILE_COMPAT)gcc
    endif
    --
    2.25.1
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