Re: [PATCH v5 19/23] arm64: Enable compat vDSO support

[Mark Rutland <mark.rutland@arm.com>]

On Fri, Feb 22, 2019 at 12:24:26PM +0000, Vincenzo Frascino wrote:
> Enable compat vDSO support in the arm64 defconfig.
> 
> Note that the default compiler is set to arm-linux-gnueabihf-.
> For this to take effect and for the compat vDSO to compile correctly, it
> is required that this compiler is in the PATH.

I do not have such a compiler in my path by default.

I hope that we handle that gracefully, rather than causing a build
failure.

Can't we detect the presence of the compat compiler at config time, as
happens for the native compiler?

Thanks,
Mark.

> 
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> ---
>  arch/arm64/configs/defconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index c8432e24207e..3adebe5f3573 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -120,6 +120,7 @@ CONFIG_ACPI_APEI_MEMORY_FAILURE=y
>  CONFIG_ACPI_APEI_EINJ=y
>  CONFIG_VIRTUALIZATION=y
>  CONFIG_KVM=y
> +CONFIG_CROSS_COMPILE_COMPAT_VDSO="arm-linux-gnueabihf-"
>  CONFIG_ARM64_CRYPTO=y
>  CONFIG_CRYPTO_SHA1_ARM64_CE=y
>  CONFIG_CRYPTO_SHA2_ARM64_CE=y
> -- 
> 2.20.1
>