Re: [Haskell-cafe] can't build module with ffi 'wrapper' by cabal (or ghc): unknown symbol

On 7/4/05, Evgeny Chukreev wrote:

On Wed, 29 Jun 2005 22:05:49 +0400 /Evgeny/ /Chukreev/ wrote me:

EC> gcc src/Codec/Mhash_stub.c -o ... EC> /usr/bin/ar qv dist/build/libHSHMhash-0.1.a dist/build/src/Codec/Mhash.o EC> /usr/bin/ar: creating dist/build/libHSHMhash-0.1.a EC> a - dist/build/src/Codec/Mhash.o (why mhash_stub.o did not archived?)

Does no answer to my question mean that there is no-one who knows what kind of bug it is (ghc/cabal/mine) or it is the fact that nobody cares (even the developers of ghc/cabal)?

Without answer I can't continue developing that wrapper for mhash library.

The problem lies in GHC. $fptools/ghc/compiler/main/DriverPipeline.hs:514 to be exact. You can link 'dist/build/WrapperMod.o' to 'dist/build/Your/Hierarchy/WrapperMod.o' as a dirty fix. Perhaps copying it after builds with a Cabal hook would be cleaner. -- Friendly, Lemmih