Dear Mike Frysinger,
In message 201009210351.16288.vapier@gentoo.org you wrote:
It is my understanding that you cannot "downgrade" GPLv3 code, i. e. you cannot link it into a GPLv2 project. But then, I'm not a license expert, and IANAL.
in-my-not-a-lawyer-opinion, i think introducing GPLv3 code makes the final output GPLv3 only if the build includes it.
I guess this is correct.
so if the imported GRUB code stays at GPLv3, and is only for x86, and all of the code Graeme is using from u-boot is GPLv2+, then the final result there is under GPLv3 only. but all his GPLv3 code, assuming it's specific to x86, wont affect other architectures.
But Graeme would also have to make sure not topick up any partsof the U-Boot code that are GPLv2 (without the "or later" phrase). A license nightmare...
Best regards,
Wolfgang Denk