Gentoo has announced stable support for the AArch64 (ARM64) architecture.

Gentoo Project announced for the stabilization of the profile for the architecture AArch64 (ARM64), which has been promoted to the category of primary architectures, now receiving full support and updates to address vulnerabilities. Supported ARM64 platforms include Raspberry Pi 3 (Model B), Odroid C2, Pine (A64+, Pinebook, Rock64, Sopine64, RockPro64), DragonBoard 410c, and Firefly AIO-3399J.

Source: opennet.ru