[PATCH 08/19] Makefile: add barebox.elf build target

[Ahmad Fatoum]

Hi,

On 1/5/26 12:26 PM, Sascha Hauer wrote:
> Add a build target to create barebox.elf, which provides an ELF format
> version of barebox that can be used for debugging or alternative boot
> scenarios.
> 
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> Co-Authored-By: Claude Sonnet 4.5 <noreply at anthropic.com>

I think conceptually, the Co-Authored-By should be before your S-o-b.

> ---
>  Makefile | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/Makefile b/Makefile
> index 75e14383bcdcf987d091442adba9b053af28eae7..c1aa6935abe5c65156b812d4a0b21c6d488038ae 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -850,6 +850,9 @@ all: barebox-flash-images
>  endif
>  
>  all: $(symlink-y)
> +ifeq ($(CONFIG_PBL_IMAGE)-$(CONFIG_PBL_IMAGE_NO_PIGGY),y-)
> +all: barebox.elf
> +endif

Why not:

ifdef CONFIG_PBL_IMAGE_ELF
export BAREBOX_PROPER ?= vmbarebox # or barebox.elf
else
export BAREBOX_PROPER ?= barebox.bin
endif

>  
>  .SECONDEXPANSION:
>  $(symlink-y): $$(or $$(SYMLINK_DEP_$$(@F)),$$(SYMLINK_TARGET_$$(@F))) FORCE
> @@ -1091,6 +1094,17 @@ barebox.fit: images/barebox-$(CONFIG_ARCH_LINUX_NAME).fit
>  barebox.srec: barebox
>  	$(OBJCOPY) -O srec $< $@
>  
> +OBJCOPYFLAGS_barebox.elf = --strip-debug --strip-unneeded \

--strip-section-headers goes the farthest I think.

> +			   --remove-section=.comment \
> +			   --remove-section=.note \

--remote-section=.note*

> +			   --remove-section=.note.gnu.build-id

--remove-section=.gnu.hash?

> +
> +quiet_cmd_objcopy_elf = OBJCOPY $@
> +      cmd_objcopy_elf = $(OBJCOPY) $(OBJCOPYFLAGS_barebox.elf) $< $@
> +
> +barebox.elf: barebox FORCE
> +	$(call if_changed,objcopy_elf)

There is already cmd_objcopy. You should be able to reuse it with

OBJCOPYFLAGS_$@ = $your_options.


Sidenote: We should add --error-rwx-segments depending on
CONFIG_PBL_IMAGE_ELF.

Cheers,
Ahmad

> +
>  quiet_cmd_barebox_proper__ = CC      $@
>        cmd_barebox_proper__ = $(CC) -r -o $@ -Wl,--whole-archive $(BAREBOX_OBJS)
>  
> @@ -1388,7 +1402,7 @@ CLEAN_FILES +=	barebox System.map include/generated/barebox_default_env.h \
>                  .tmp_version .tmp_barebox* barebox.bin barebox.map \
>  		.tmp_kallsyms* barebox.ldr compile_commands.json \
>  		.tmp_barebox.o barebox.o barebox-flash-image \
> -		barebox.srec barebox.s5p barebox.ubl \
> +		barebox.srec barebox.elf barebox.s5p barebox.ubl \
>  		barebox.uimage \
>  		barebox.efi barebox.canon-a1100.bin
>  
> 

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