config BR2_TARGET_ROOTFS_ISO9660
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bool "iso image"
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depends on (BR2_i386 || BR2_x86_64)
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depends on BR2_LINUX_KERNEL
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depends on BR2_TARGET_GRUB2_I386_PC || \
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BR2_TARGET_SYSLINUX_ISOLINUX
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select BR2_LINUX_KERNEL_INSTALL_TARGET \
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if (!BR2_TARGET_ROOTFS_ISO9660_INITRD && !BR2_TARGET_ROOTFS_INITRAMFS)
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help
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Build a bootable ISO9660 image. By default, the root
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filesystem is directly packed as the ISO9660 filesystem,
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which means the root filesystem will be read-only. It
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requires ISO9660 filesystem support and CDROM support in the
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kernel.
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However, if BR2_TARGET_ROOTFS_INITRAMFS or
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BR2_TARGET_ROOTFS_ISO9660_INITRD have been enabled, the
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ISO9660 filesystem will only contain a kernel image and
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optionally an external initrd image. In this case, the
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filesystem being in RAM, it will be read/write. No ISO9660
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or CDROM support is needed in the kernel.
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if BR2_TARGET_ROOTFS_ISO9660
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choice
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prompt "Bootloader"
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config BR2_TARGET_ROOTFS_ISO9660_GRUB2
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bool "grub2"
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depends on BR2_TARGET_GRUB2_I386_PC
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help
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Use Grub 2 as the bootloader for the ISO9660 image. Make
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sure to enable the 'iso9660' module in
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BR2_TARGET_GRUB2_BUILTIN_MODULES and to use 'cd' as the boot
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partition in BR2_TARGET_GRUB2_BOOT_PARTITION=.
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config BR2_TARGET_ROOTFS_ISO9660_ISOLINUX
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bool "isolinux"
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depends on BR2_TARGET_SYSLINUX_ISOLINUX
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endchoice
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config BR2_TARGET_ROOTFS_ISO9660_BOOT_MENU
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string "Boot menu config file"
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default "fs/iso9660/grub.cfg" if BR2_TARGET_ROOTFS_ISO9660_GRUB2
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default "fs/iso9660/isolinux.cfg" if BR2_TARGET_ROOTFS_ISO9660_ISOLINUX
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help
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Use this option to provide a custom bootloader configuration
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file (grub.cfg for Grub 2, isolinux.cfg for isolinux).
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Note that the strings __KERNEL_PATH__ and __INITRD_PATH__
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will automatically be replaced by the path to the kernel and
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initrd images respectively.
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config BR2_TARGET_ROOTFS_ISO9660_INITRD
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bool "Use initrd"
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default y
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select BR2_TARGET_ROOTFS_CPIO
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help
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Enable this option to have the root filesystem bundled as an
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initrd/initramfs rather than directly as the ISO9660
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filesystem. With this option enabled, the ISO9660 will only
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contain a kernel image, an initrd image (unless an initramfs
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linked into the kernel is used) and the bootloader.
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config BR2_TARGET_ROOTFS_ISO9660_TRANSPARENT_COMPRESSION
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bool "transparent compression"
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depends on !BR2_TARGET_ROOTFS_ISO9660_INITRD
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depends on !BR2_TARGET_ROOTFS_INITRAMFS
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help
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Say 'y' to enable use of transparent (de)compression. Files
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are stored compressed and will be decompressed on-the-fly
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upon access at runtime.
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config BR2_TARGET_ROOTFS_ISO9660_HYBRID
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bool "Build hybrid image"
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depends on BR2_TARGET_ROOTFS_ISO9660_ISOLINUX
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help
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Enable this option to build an hybrid image, i.e an image
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which can either be booted from a CD-ROM or from a device
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which BIOS considers a hard disk or ZIP disk, e.g. a USB key
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or similar.
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endif
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comment "iso image needs a Linux kernel and either grub2 i386-pc or isolinux to be built"
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depends on BR2_i386 || BR2_x86_64
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depends on !BR2_LINUX_KERNEL || \
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!(BR2_TARGET_GRUB2_I386_PC || BR2_TARGET_SYSLINUX_ISOLINUX)
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