Install c2hs-doc by entering the following commands in the terminal:
sudo apt update sudo apt install c2hs-doc
C->Haskell Interface Generator -- Documentation package
C->Haskell is an interface generator that simplifies the development of Haskell bindings to C libraries. The tool processes existing C header files that determine data layout and function signatures on the C side in conjunction with Haskell modules that specify Haskell-side type signatures and marshaling details. Hooks embedded in the Haskell code signal access to C structures and functions -- they are expanded by the interfacing tool in dependence on information from the corresponding C header file. . Haskell 98 is "the" standard lazy functional programming language. More info plus the language definition is at http://www.haskell.org/. . This package contains documentation for c2hs.