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grub2: prepare and install El Torito image

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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@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
This commit is contained in:
Thomas Petazzoni 2015-06-09 00:21:47 +02:00
parent 5bac06e881
commit 8decd25477
1 changed files with 2 additions and 0 deletions
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2
boot/grub2/grub2.mk
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@ -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