Quoting Stephen Tetley
This is actually due to a missing header file included *by* system_encoding.h rather than Cabal not finding system_encoding.h. It took to me a while to spot that one! [note to self - always check for this in future].
The missing header is
- where it originates I don't know, as I don't have it with either Msys/MinGW or Cygwin and my Cygwin is pretty large these days.
Ah, nice catch.
Generally I'd be advise building with "runhaskell Setup.hs ..." from MinGW, the first step of which would be something like:
runhaskell Setup.hs configure --extra-include-dirs=C:\\msys\\1.0\\home\\stephen\\encoding-0.6.3 --extra-lib-dirs=C:\\msys\\1.0\\home\\stephen\\encoding-0.6.3
Whooo, boy, I sure don't fancy explaining Msys/MinGW or Cygwin to a non-technical person and giving sufficiently detailed installation/usage instructions. It looks like langinfo.h is all about detecting the user's locale. I'm using the encoding library for a task where the encoding is always specified exactly, so maybe the right thing to do here is figure out if I can get away with a gutted version of the library that doesn't need system_encoding.h, and if so, add a build flag that can disable it. In any case, thanks for the pointers! ~d