Re: [Haskell-cafe] global variables for foreign C functions

I would find a ForeignData extension incredibly helpful. This will be crucial if Haskell ever wants to target out of the ordinary systems. /jve On Mon, Dec 1, 2008 at 8:38 PM, John Meacham wrote:

On Mon, Dec 01, 2008 at 04:55:14PM -0800, Evan Laforge wrote:

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On Mon, Dec 1, 2008 at 4:39 PM, Andrea Rossato wrote:

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Hello,

I'm writing the bindings to a C library which uses, in some functions, global variables.

To make it clearer, those functions need a global variable to be defined. A C program using my_function, one of the library functions, would look like:

I don't think you can use the FFI to declare symbols for C. One not-so-pretty but effective way to do it is create a stub.c with the variables declared along with setting functions, then bind those functions like any other.

Yes, it is unfortunate this is the case. my ForeignData proposal was meant to address this:

http://hackage.haskell.org/trac/haskell-prime/wiki/ForeignData

I am not entirely sure about the proposal as described, but I think something like it should be done.

John

-- John Meacham - ⑆repetae.net⑆john⑈ _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe