Packages with the multilib use flag

Global definition: On 64bit systems, if you want to be able to compile 32bit and 64bit binaries.

dev-lang / gnat-gpl : GNAT Ada Compiler - GPL version

dev-util / rr : Record and Replay Framework

media-gfx / nvidia-cg-toolkit : NVIDIA's C graphics compiler toolkit

net-voip / mumble : Mumble is an open source, low-latency, high quality voice chat software

sys-devel / gcc : The GNU Compiler Collection

sys-libs / glibc : GNU libc C library

sys-libs / libstdc++-v3 : Compatibility package for binaries linked against a pre gcc 3.4 libstdc++

www-plugins / gosuslugi-plugin : Crypto-provider browser plugin for russian e-gov site https://gosuslugi.ru/