libflang-16-dev 1:16.0.0~+rc4-1~exp1ubuntu2 (arm64 binary) in ubuntu lunar

 Ground-up implementation of a Fortran front end written in
 modern C++.
 .
 While it is capable of generating executables for a number
 of examples, some functionalities are still missing.
 .
 This package contains the flang libraries and headers.