Re: cabal: question on compiling build prerequisites

On Sun, Dec 8, 2013 at 7:50 PM, Peter Selinger wrote:

thanks for your reply! So say my package directory contains two files:

Test.hs PreProc.hs

What you are suggesting is:

ghc Test.hs -F -pgmF ./PreProc

However, this gives the error message:

ghc: could not execute: ./PreProc

And indeed, while GHC is smart enough to automatically run a preprocessor, it is not smart enough to automatically *compile* the preprocessor. So it needs to be compiled beforehand, which would be Cabal's job.

Not per se. You could try making it executable, and prepending a line like: #!/usr/bin/env runhaskell That way you can run your preprocessor like a script, without compiling it. Erik