Mystery solved. The OpenCLRaw bindings were set to use ccall but OpenCL uses stdcall. I've updated my branch of the bindings. Details on stackoverflow: http://stackoverflow.com/questions/7391634/cant-link-opencl-on-windows-with-... Jason On Mon, Sep 12, 2011 at 10:29 AM, Jason Dagit wrote:

Hello,

I'm trying to get the OpenCLRaw bindings to a point where I can use them on windows.  I've forked the the OpenCLRaw repo on github so I can make modifications as needed.  My branch is here: https://github.com/dagit/OpenCLRaw

I've been mostly working out of my "FunPtr" branch.

The issue I'm having is this:  I installed AMD's OpenCL SDK, converted their Visual Studio specific .lib file to a file that gcc can handle (.a file), but ghc can't seem to link with it.  I get undefined symbols for everything I use in the OpenCL API.

I was able to build a "trivial" C program and link it using the .a file that I generated and gcc from mingw (not from the Haskell install).  I'm using the latest windows release of the Haskell platform.

These are the steps I used for generating the .a file: http://forums.amd.com/forum/messageview.cfm?catid=390&threadid=138890

I used the commands in the example script (e.g., gendef and dlltool). I've tried to use 32bit everything as much as possible, as I know that GHC will want everything to be 32bit, so I don't think it's a 32bit vs. 64bit issue.

Does anyone know if there is something different about invoking gcc under ghc instead of the gcc that I get from mingw?

I've also played with the ghc command line (I used cabal-dev --verbose=3 to inspect the command line) and I'm still unable to massage it into a working state.

Any help would be appreciated!

Thanks, Jason