That did it. I've added ":set -package applicative-numbers" to my .ghci and am back in business. Thanks!
IIUC, there's an inconsistency in ghci's treatment of modules vs include files, in that modules will be found without -package, but include files won't. Room for improvement, perhaps. - Conal On Sun, Mar 15, 2009 at 5:27 AM, Duncan Coutts <duncan.cou...@worc.ox.ac.uk>wrote: > On Sat, 2009-03-14 at 23:43 -0700, Conal Elliott wrote: > > The applicative-numbers package [1] provides an include file. With > > ghci, the include file isn't being found, though with cabal+ghc it is > > found. > > > > My test source is just two lines: > > > > {-# LANGUAGE CPP #-} > > #include "ApplicativeNumeric-inc.hs" > > > > I'd sure appreciate it if someone could take a look at the .cabal file > > [2] and tell me if I'm doing something wrong. And/or point me to one > > or more working examples of cabal packages that export include files > > that are then findable via ghci. > > This sounds like a chicken and egg problem. To know which package > include directories to use GHCi needs to know which packages your module > uses. However to work out which packages it needs it has to load the > module which means pre-processing it! > > With cabal we get round this problem because Cabal calls ghc with > -package this -package that etc and so when ghc cpp's the module it does > know which package include directories to look in. > > So if you did ghci -package applicative-numbers then it should work. I'm > afraid I don't have any good suggestion for how to make it work with > ghci without having to specify any options at all. > > Duncan > >
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