[OE-core] [v3 PATCH 0/9] Improved EFI boot support

[Jason Wessel]

V3
- Add comment about isolinux.bin required in EFI only case
- Fix typo of PCIBIOS -> PCBIOS
- Change COMPRESSISO ?= "" -> COMPRESSISO ?= "0" for the default
- Add comment to EFI/ISO syslinux.bbclass to clarify workaround
  with EFI only case and hybrid boot
- Add patch to fix syslinux serial and menu problems
- Add patch to fix boot-directdisk.bbclass
* Two new patches are 7 & 8, the zisofs patch moved from 7 -> 9


V2
- Added reference to YOCTO #1913 for per Darren
- Remove PR number from cdrtools uprev
- Added Saul's change to cdrtools to get rid of STAGE_TEMP
- made the builtin grub cfg file copied from a SRC_URI
- upreved syslinux to 6.01
- Use the new isohybrid command from syslinux which can now
  generate EFI enabled ISO's which can boot directly when
  dd'ed to a USB or HDD device.
- Dropped any references to efi or pcbios in the qemu* configs
- Added the zisofs patch to the end of the series instead
  of depending on it, in case it is dropped later.
- git -format-patch -M20% is your friend for seeing the
  delta on recipe upgrades :-)

YAY, with the new version of syslinux it is now possible to
build a single live ISO image which can boot in legacy mode
or EFI on optical media or USB devices.

We still have to create 2 ISO's one for 32bit EFI systems and one for
64bit EFI systems but this is also true of all other Linux
distributions today as well.

Jason.

---

The goal of this patch set is to put the EFI ISO boot method on par
with the ISO PCBIOS boot method.  This also allows for the creation of
a single ISO image which can boot in "legacy boot" mode or EFI boot
mode.

In order to make this possible the cdrtools needed an update to the
very latest and this brings in an license change.  Given that change
it was not entirely clear to me if we needed to leave the older
package around.  I opted to remove the older package recipe since
there was no clean way to fail in the case you wanted to build EFI
boot media.

The bbnote that was previously in the bootimg.bbclass about EFI only
media being untested was a bit of an understatement, as the images
would not even build without errors due to the call to isohybrid.  I
removed any such warnings because that path has been fully vetted now.

Cheers,
Jason.


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