Dominic Steinitz
So I added
Ghc-options: -fglasgow-exts
You might look at the Extensions field to see if your exstension is explicitly listed there.
to the cabal file. Now this module compiles but I still get the same error on a different module and I know -fglasgow-exts allows this to compile when I do it by hand.
It's perhaps because it's trying to build an executable at this point and you didn't add that flag to the executables. I take it that the executables depend on the library? (snip)
Why is cabal recompiling sources and why am I getting errors on the second compilation?
Executables that depend on their own libraries are slightly awkward right now; we hope to improve support for that in the future. For now, you should add that flag to both executables. You should also list the depended-upon modules to the other-modules field for that executable.
The sources and the cabal file are available via:
I couldn't build it because I don't have the NewBinary package. peace, isaac