[cffi-devel] Recommended way to specify libraries

[Luke Crook]

I don't think that this is such a burden. This is how libs are loaded in
lisp builder-sdl.


(cffi:define-foreign-library sdl
  (:darwin (:or (:framework "SDL")
                (:default "libSDL")))
  (:windows "SDL.dll")
  (:unix (:or "libSDL-1.2.so.0.7.2"
              "libSDL-1.2.so.0"
              "libSDL-1.2.so"
              "libSDL.so"
              "libSDL")))


On Tuesday, December 31, 2013, Luís Oliveira wrote:

> On Tue, Dec 31, 2013 at 6:58 PM, Elliott Slaughter
> <elliottslaughter at gmail.com <javascript:;>> wrote:
> > with the comment "the define-foreign-library clause (t (:default
> "libcurl"))
> > [...] will adapt to various operating systems".
> >
> > I'm wondering exactly how smart is this automatic handling?
>
> Right now, it simply appends an extension like ".dll" or ".dylib". It
> doesn't handle versions or anything like that.
>
>
> > On Windows, for example, the conventions are not always followed so
> closely,
> > and as a result I keep adding more special cases to my
> > define-foreign-library clauses when users complain they can't load the
> > libraries.
> >
> > For example, libpng might be png.dll or libpng.dll or libpng12.dll or
> > libpng12-0.dll or libpng15-15.dll.
> >
> > Will I be required to maintain a list of all possible names for the rest
> of
> > eternity or is there some better way to manage this situation?
>
> Yeah, that sucks. I'm not aware of a better general solution. In some
> cases, you might get away with searching for "*png*.dll" then loading
> that using load-foreign-library, but I suppose you need to be careful
> where you search.
>
> HTH,
>
> --
> Luís Oliveira
> http://kerno.org/~luis/
>
>
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