Re: CUDA and MinGW compilation trouble

> On Fri, May 2, 2008 at 5:31 AM, Timothy M. Shead <tshead@...> wrote:
> >  > 1. Put all functions that use CUDA in a .h/.c file, declaring them
> >  > using __declspec(dllexport) in the .h file.
> >  This would need to be conditional based on the platform, que no?
>
> Yes, we need to wrap it in a macro that evaluates to nothing on
> non-win32 platforms.
>
> >  > For a more elegant solution, I suggest putting the cuda library of
> >  > step 2 in a subdir of k3dsdk, i.e. k3dsdk/cuda. That way, any modules
> >  > that want to use CUDA can simply include it in the
> >  > TARGET_LINK_LIBRARIES command. I think this has to be a C library,
> >  > otherwise the exported symbols are mangled in a way MinGW can't read.
> >  >
> >  How could this be part of the SDK?  These are the plugin-specific
> >  implementations we're talking-about, right?
>
> Well, I was thinking we could put generic methods in this lib, such as:
> bitmap_to_device(const k3d bitmap, pointer to device memory)
> bitmap_add_constant(pointer  to device memory, const scalar)
> bitmap_to_host(const pointer to device memory, k3d bitmap)
>
> Later on, we can add some operations for meshes, like point linear
> transformation and so on.
>
> This would mean we only need one k3dsdk-cuda.dll on windows. The
> alternative (win32 only) would be to have one dll that has to be in
> the search path for each module, often duplicating a lot of code. This
> is purely a consequence of MinGW not being able to link in the objects
> generated by nvcc, or compile its C output.
>
> The advantage, even on linux, is that operations to move K-3D
> structures to and from the device only need to be defined once.
>
> regards,
>
> --
> Bart
>
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