Upstream git shows some GCC 5.1 related fixes, so it seems likely that this will be fixed in the next upstream release.
commit 71c917e00ad5de5161e1576073c088cfeb762be5 Merge: ed2a7a8 d2e5f9d Author: Matt McCormick <matt.mccorm...@kitware.com> Date: Mon Jun 22 14:10:52 2015 -0400 Merge topic 'gcc51' -- Martin Michlmayr Linux for HP Helion OpenStack, Hewlett-Packard -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org