The package gcc-riscv64-unknown-elf 8.3.0.2019.08+dfsg-1 has been added to kali-rolling. It has been imported from Debian: https://tracker.debian.org/pkg/gcc-riscv64-unknown-elf -- More information about gcc-riscv64-unknown-elf: http://pkg.kali.org/pkg/gcc-riscv64-unknown-elf
