Comment 5 for bug 1459706

There is an updated build of grub in the wily daily images, compared with the 15.04 release. The source changes to grub should not be an issue, but there have been toolchain updates between the two builds of grub, which may come into play.

From the ppc64el build log of grub2 2.02~beta2-22ubuntu1:
Toolchain package versions: libc6-dev_2.21-0ubuntu4 make_4.0-8.1 dpkg-dev_1.17.24ubuntu1 gcc-4.9_4.9.2-10ubuntu12 g++-4.9_4.9.2-10ubuntu12 binutils_2.25-5ubuntu6 libstdc++-4.9-dev_4.9.2-10ubuntu12 libstdc++6_4.9.2-10ubuntu12

From the ppc64el build log of grub2 2.02~beta2-23:
Toolchain package versions: libc6-dev_2.21-0ubuntu4 make_4.0-8.1 dpkg-dev_1.17.25ubuntu1 gcc-4.9_4.9.2-17ubuntu1 g++-4.9_4.9.2-17ubuntu1 binutils_2.25-5ubuntu7 libstdc++-4.9-dev_4.9.2-17ubuntu1 libstdc++6_5.1.1-5ubuntu4