Can't pass extra arguments to c2hs

[bos]

(Imported from Trac #863, reported by guest on 2011-07-16)

With cabal-install 0.10.2, I am no longer able to pass extra arguments to c2hs. When invoked as:

cabal install -O --c2hs-option=--cppopts=-U__BLOCKS__  --c2hs-options="--dump=trace" -v

c2hs is then called as

/Users/localuser/.cabal/bin/c2hs --cpp=/usr/bin/gcc --cppopts=-E --cppopts=-D__GLASGOW_HASKELL__=700 --cppopts=-Ddarwin_BUILD_OS --cppopts=-Ddarwin_HOST_OS --cppopts=-Dx86_64_BUILD_ARCH --cppopts=-Dx86_64_HOST_ARCH --cppopts=-Icbits --cppopts=-DUSE_SSE2 --include=dist/build --cppopts=-I/Users/localuser/.cabal/lib/vector-0.7.0.1/ghc-7.0.4/include --cppopts=-I/Users/localuser/.cabal/lib/primitive-0.3.1/ghc-7.0.4/include --cppopts=-I/opt/local/include/ --cppopts=-I/usr/local/lib/ghc-7.0.4/base-4.3.1.0/include --cppopts=-I/usr/local/lib/ghc-7.0.4/include --cppopts=-I/usr/local/lib/ghc-7.0.4/include --output-dir=dist/build --output=Sound/Barnet/BandedLib.hs src/Sound/Barnet/BandedLib.chs --cppopts=-U__BLOCKS__ --dump=trace

The extra arguments are appended to the end of the call, however c2hs (at least c2hs-0.16.3) requires that the .chs binding file come after all options.

[bos]

(Imported comment by @dcoutts on 2011-07-16)

Mm, interesting. Yes, we changed it so that user-supplied arguments go at the end, because that way they override whatever other params that cabal passes.

We do also have internally a way to specify arguments that are prepended. We might need to expose this. Of course c2hs should also just be fixed so it's not so picky.

[mietek]

This is still an issue with c2hs. (haskell/c2hs#86)

[mietek]

As of 3728e1e5dce5cd116aa39209fea03aef90a90cd1, this is no longer an issue with c2hs.