"stack ghci" doesn't honor configured cpp flags #970
Description
The project https://github.com/peti/nix-paths uses Cabal's extension hooks to register additional flags for CPP in the build process. Both cabal-install and stack can build the project fine. The interactive REPL, however, works only for cabal-install. When I use stack to interpret the source code, I get the following error:
/tmp$ git clone git://github.com/peti/nix-paths.git
Cloning into 'nix-paths'...
remote: Counting objects: 34, done.
remote: Compressing objects: 100% (21/21), done.
remote: Total 34 (delta 10), reused 33 (delta 9), pack-reused 0
Receiving objects: 100% (34/34), 6.14 KiB | 0 bytes/s, done.
Resolving deltas: 100% (10/10), done.
Checking connectivity... done.
/tmp$ cd nix-paths
/tmp/nix-paths$ stack init
Writing default config file to: /tmp/nix-paths/stack.yaml
Basing on cabal files:
- /tmp/nix-paths/nix-paths.cabal
Checking against build plan lts-3.4
Selected resolver: lts-3.4
Wrote project config to: /tmp/nix-paths/stack.yaml
/tmp/nix-paths$ stack build
nix-paths-1: configure
Configuring nix-paths-1...
nix-paths-1: build
Preprocessing library nix-paths-1...
[1 of 2] Compiling Nix.Paths ( src/Nix/Paths.hs, .stack-work/dist/x86_64-linux/Cabal-1.22.4.0/build/Nix/Paths.o )
[2 of 2] Compiling Nix.FindFile ( src/Nix/FindFile.hs, .stack-work/dist/x86_64-linux/Cabal-1.22.4.0/build/Nix/FindFile.o )
In-place registering nix-paths-1...
nix-paths-1: install
Installing library in
/tmp/nix-paths/.stack-work/install/x86_64-linux/lts-3.4/7.10.2/lib/x86_64-linux-ghc-7.10.2/nix-paths-1-CYictmtGnnPASIdBC8IhC0
Registering nix-paths-1...
/tmp/nix-paths$ stack ghci
nix-paths-1-75cbca45d7eb4d1f9747e6dd01e83080: unregistering (local file changes)
Configuring GHCi with the following packages: nix-paths
GHCi, version 7.10.2: http://www.haskell.org/ghc/ :? for help
[1 of 2] Compiling Nix.Paths ( /tmp/nix-paths/src/Nix/Paths.hs, interpreted )
/tmp/nix-paths/src/Nix/Paths.hs:7:18:
Not in scope: data constructor ‘PATH_TO_NIX_INSTANTIATE’
/tmp/nix-paths/src/Nix/Paths.hs:11:12:
Not in scope: data constructor ‘PATH_TO_NIX_BUILD’
/tmp/nix-paths/src/Nix/Paths.hs:15:10:
Not in scope: data constructor ‘PATH_TO_NIX_ENV’
/tmp/nix-paths/src/Nix/Paths.hs:19:12:
Not in scope: data constructor ‘PATH_TO_NIX_STORE’
Failed, modules loaded: none.
Prelude>
cabal-install, on the other hand, works just fine:
/tmp/nix-paths$ cabal repl
Package has never been configured. Configuring with default flags. If this
fails, please run configure manually.
Resolving dependencies...
[1 of 1] Compiling Main ( dist/setup/setup.hs, dist/setup/Main.o )
Linking ./dist/setup/setup ...
Configuring nix-paths-1...
Preprocessing library nix-paths-1...
GHCi, version 7.10.2: http://www.haskell.org/ghc/ :? for help
[1 of 2] Compiling Nix.Paths ( src/Nix/Paths.hs, interpreted )
[2 of 2] Compiling Nix.FindFile ( src/Nix/FindFile.hs, interpreted )
Ok, modules loaded: Nix.Paths, Nix.FindFile.
*Nix.Paths>
I suppose this means that stack doesn't correctly pick up the extra flags provided by Setup.lhs. I'm using Stack version 0.1.4.