ghc-hpp

hpp is a Haskell pre-processor that is also a C90-compatible pre-processor
(with the addition of a --cpp flag). It is packaged as both a library and an
executable.
To use as a Haskell preprocessor for resolving #ifdef conditionals and macro
hpp -DDEBUG Foo.hs


To use as a C preprocessor, an invocation might look like,
hpp -DDEBUG --cpp foo.c


To have GHC use hpp as the C pre-processor, add this line to the top of a
Haskell source file that makes use of the CPP LANGUAGE pragma,
{-# OPTIONS_GHC -cpp -pgmPhpp #-}


Or add this line to your .cabal file:
ghc-options: -pgmPhpp


Note that you will need to ensure that the hpp executable is available in your
build environment (e.g. you can add hpp as a build-depends in your .cabal
file).

          

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License: BSD-3-Clause
URL: https://hackage.haskell.org/package/hpp