[Buildroot] [git commit branch/next] grub2: prepare and install El Torito image

Thomas Petazzoni thomas.petazzoni at free-electrons.com
Sat Aug 8 10:56:34 UTC 2015


commit: http://git.buildroot.net/buildroot/commit/?id=8decd25477fe5a8bb314e65c9b1a2c9d54bc9124
branch: http://git.buildroot.net/buildroot/commit/?id=refs/heads/next

In order to support ISO9660 bootable images that rely on Grub 2, this
commit modifies thr Grub 2 makefile to generate and install an El
Torito image. Such an image is simply produced by concatenating the
cdboot.img provided by Grub 2, and the Grub 2 image generated by
Buildroot using grub-mkimage.

Since this action is so simple and cost-free, we don't bother adding a
Grub 2 sub-option for that, and simply generate the El Torito image
unconditionally.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
---
 boot/grub2/grub2.mk |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/boot/grub2/grub2.mk b/boot/grub2/grub2.mk
index 697f0ad..280b4d6 100644
--- a/boot/grub2/grub2.mk
+++ b/boot/grub2/grub2.mk
@@ -76,6 +76,8 @@ define GRUB2_IMAGE_INSTALLATION
 		-p "$(GRUB2_PREFIX)" \
 		$(if $(GRUB2_BUILTIN_CONFIG),-c $(GRUB2_BUILTIN_CONFIG)) \
 		$(GRUB2_BUILTIN_MODULES)
+	cat $(HOST_DIR)/usr/lib/grub/$(GRUB2_TUPLE)/cdboot.img $(GRUB2_IMAGE) > \
+		$(BINARIES_DIR)/grub-eltorito.img
 	mkdir -p $(dir $(GRUB2_CFG))
 	$(INSTALL) -D -m 0644 boot/grub2/grub.cfg $(GRUB2_CFG)
 endef


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