[PATCH v2 09/21] Makefile: add barebox.elf build target

[Sascha Hauer <s.hauer@pengutronix.de>]

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@pengutronix.de>
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
---
 Makefile | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 3b31cecc22c431a063b8d2d3c387da487b698e74..aa12b385c779512fe20d33792f4968fed2eec29a 100644
--- a/Makefile
+++ b/Makefile
@@ -853,6 +853,9 @@ all: barebox-flash-images
 endif
 
 all: $(symlink-y)
+ifeq ($(CONFIG_PBL_IMAGE)-$(CONFIG_PBL_IMAGE_NO_PIGGY),y-)
+all: barebox.elf
+endif
 
 .SECONDEXPANSION:
 $(symlink-y): $$(or $$(SYMLINK_DEP_$$(@F)),$$(SYMLINK_TARGET_$$(@F))) FORCE
@@ -1096,6 +1099,14 @@ barebox.fit: images/barebox-$(CONFIG_ARCH_LINUX_NAME).fit
 barebox.srec: barebox
 	$(OBJCOPY) -O srec $< $@
 
+OBJCOPYFLAGS_barebox.elf = --strip-debug --strip-unneeded \
+			   --remove-section=.comment \
+			   --remove-section=.note* \
+			   --remove-section=.gnu.hash
+
+barebox.elf: barebox FORCE
+	$(call if_changed,objcopy)
+
 quiet_cmd_barebox_proper__ = CC      $@
       cmd_barebox_proper__ = $(CC) -r -o $@ -Wl,--whole-archive $(BAREBOX_OBJS)
 
@@ -1378,7 +1389,7 @@ CLEAN_FILES +=	barebox System.map include/generated/barebox_default_env.h \
                 .tmp_version .tmp_barebox* barebox.bin barebox.map \
 		.tmp_kallsyms* compile_commands.json \
 		.tmp_barebox.o barebox.o barebox-flash-image \
-		barebox.srec barebox.efi
+		barebox.srec barebox.efi barebox.elf
 
 CLEAN_FILES +=	scripts/bareboxenv-target scripts/kernel-install-target \
 		scripts/bareboxcrc32-target scripts/bareboximd-target \

-- 
2.47.3