Debian Works Towards Upstream Qt4 ARM 64-bit Support
Dmitry Shachnev on the behalf of Debian package maintainers has offered up Qt patches to support AArch64, the 64-bit ARM architecture that will be soon appearing in more mobile devices where Qt is beginning to play an important role with its Android, iOS, and (current out of tree) Tizen support, among other targets.
Dmitry wrote, "In Debian/Ubuntu, we have been working to enable AArch64 (aka ARM64) support for Qt packages. We would like to forward those patches upstream...We understand that these patches might be seen as a new feature for Qt4, but the reality is that they will get applied on all distributions wanting to support arm64, so it's better to have them upstreamed."
While these patches are for Qt4 where most of the upstream toolkit developers are just centered on Qt5, from the comments so far it seems the patches have a chance of being merged to what's left of the Qt4 code's future for other ARM64 distribution vendors to utilize outside of Debian/Ubuntu.