[PATCH v3 12/14] efi/riscv: libstub: mark when compiling libstub

[Andrew Jones]

On Wed, Nov 30, 2022 at 11:56:12PM +0100, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner at vrull.eu>
> 
> We may want to runtime-optimize some core functions (str*, mem*),
> but not have this leak into libstub and cause build issues.
> Instead libstub, for the short while it's running, should just use
> the generic implementation.
> 
> So, to be able to determine whether functions, that are used both in
> libstub and the main kernel, are getting compiled as part of libstub or
> not, add a compile-flag we can check via #ifdef.
> 
> Reviewed-by: Conor Dooley <conor.dooley at microchip.com>
> Signed-off-by: Heiko Stuebner <heiko.stuebner at vrull.eu>
> ---
>  drivers/firmware/efi/libstub/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
> index ef5045a53ce0..777d1ab059e3 100644
> --- a/drivers/firmware/efi/libstub/Makefile
> +++ b/drivers/firmware/efi/libstub/Makefile
> @@ -25,7 +25,7 @@ cflags-$(CONFIG_ARM)		:= $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
>  				   -fno-builtin -fpic \
>  				   $(call cc-option,-mno-single-pic-base)
>  cflags-$(CONFIG_RISCV)		:= $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
> -				   -fpic
> +				   -fpic -DRISCV_EFISTUB
>  cflags-$(CONFIG_LOONGARCH)	:= $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
>  				   -fpie
>  
> -- 
> 2.35.1
>

Reviewed-by: Andrew Jones <ajones at ventanamicro.com>