Re: "arm64: Silence gcc warnings about arch ABI drift" breaks clang

[Will Deacon]

On Fri, Jun 07, 2019 at 11:22:45AM -0400, Qian Cai wrote:
> The linux-next commit "arm64: Silence gcc warnings about arch ABI drift" [1]
> breaks clang build where it screams that unknown option "-Wno-psabi" and
> generates errors below,

So that can be easily fixed with cc-option...

> [1] https://lore.kernel.org/linux-arm-kernel/1559817223-32585-1-git-send-email-D
> ave.Martin@xxxxxxx/
> 
> ./drivers/firmware/efi/libstub/arm-stub.stub.o: In function
> `install_memreserve_table':
> ./linux/drivers/firmware/efi/libstub/arm-stub.c:73: undefined reference to
> `__efistub___stack_chk_guard'
> ./linux/drivers/firmware/efi/libstub/arm-stub.c:73: undefined reference to
> `__efistub___stack_chk_guard'
> ./linux/drivers/firmware/efi/libstub/arm-stub.c:93: undefined reference to
> `__efistub___stack_chk_guard'
> ./linux/drivers/firmware/efi/libstub/arm-stub.c:93: undefined reference to
> `__efistub___stack_chk_guard'
> ./linux/drivers/firmware/efi/libstub/arm-stub.c:94: undefined reference to
> `__efistub___stack_chk_fail

... but this looks unrelated. Are you saying you don't see these errors if
you revert Dave's patch?

Will