[PATCH v2 25/29] efi: Generate the app as a shared library

[Tom Rini]

On Sat, Feb 08, 2025 at 10:11:45AM -0700, Simon Glass wrote:

> The app should be built as a shared library, with position-independent
> code and the -shared flags. Update the Makefile to handle this.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
> 
> (no changes since v1)
> 
>  Makefile | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Makefile b/Makefile
> index f989c31073f..b3b13e29c26 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -452,9 +452,13 @@ KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
>  KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
>  endif
>  
> +ifdef CONFIG_EFI_APP
> +KBUILD_CFLAGS += -shared
> +else
>  # Don't generate position independent code
>  KBUILD_CFLAGS	+= $(call cc-option,-fno-PIE)
>  KBUILD_AFLAGS	+= $(call cc-option,-fno-PIE)
> +endif
>  
>  # Read UBOOTRELEASE from include/config/uboot.release (if it exists)
>  UBOOTRELEASE = $(shell cat include/config/uboot.release 2> /dev/null)

This should be tidied up with x86 being updated as well. In fact the
comment there isn't entirely useful as we still pass that with
CONFIG_POSITION_INDEPENDENT=y.

Setting flags should also likely be handled in board/efi/config.mk.

-- 
Tom
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