Some packages (e.g.
haskus-system) use these binary modules to provide
bindings to C libraries. We don’t want to rely on external tools such as C2HS to
provide bindings to C libraries because:
We don’t want to depend on .h files;
.h files often contain pecularities that are difficult to handle automatically;
Documentation and code of the resulting Haskell files are often very bad:
Very low-level (e.g. #define are not transformed into ADTs with Enum instances)
haskus-binary lets you write bindings in pure Haskell code and
provides many useful things to make this process easy.