libflang-dev 1:16.0-57~exp4 (amd64 binary) in ubuntu mantic

 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.
 .
 This is a dependency package providing the default libflang-dev package.