How about -pgmF runghc -optF PreProc?
On Mon, Dec 9, 2013 at 12:48 AM, Peter Selinger <selin...@mathstat.dal.ca>wrote: > Thanks for the suggestion! However, it is not portable: it doesn't > work on Windows. > > Similarly, giving "runhaskell ./PreProc.hs" as the preprocessor > command to GHC doesn't work either, because GHC will try to run a > program with that exact name (including the space), rather than > interpreting it as a command with an argument. > > In addition, even on Posix systems, where the above method does work, > it is nevertheless extremely slow: runhaskell will have to interpret > or compile ./PreProc.hs separately for each source file, of which > there could be many. > > Another solution I thought of is to include > > import Preproc > > at the beginning of Setup.hs. This way compiling Setup.hs would have > the side effect of compiling Preproc.hs. It would not work with the > "runhaskell Setup.hs" method, though. > > -- Peter > > Erik Hesselink wrote: > > > > On Sun, Dec 8, 2013 at 7:50 PM, Peter Selinger <selin...@mathstat.dal.ca> > 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 > > > > _______________________________________________ > cabal-devel mailing list > cabal-devel@haskell.org > http://www.haskell.org/mailman/listinfo/cabal-devel >
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