[cffi-devel] running examples - errors?

[Luis Oliveira]

On 26/set/2005, at 05:51, Surendra Singhi wrote:
> When I load the file through slime I get the error
> FFI::FOREIGN-LIBRARY-FUNCTION: no dynamic object named "sqrtf" in 
> library
> :DEFAULT
>
> but loading on the command line works fine.

That's probably because SLIME tried to compile the file. And at 
load-time, for compiled code, CLISP will try to lookup the foreign 
function (and it understandably fails, see below).

(By the way Kenny, if we remove that LOAD-TIME-VALUE in 
cffi-clisp.lisp's %FOREIGN-FUNCALL, CLISP will probably work 
dynamically like you like. Need to see how slower that would be before 
making such a change though. Although I'm still not convinced this much 
necessary.)


> But if from the command line I execute,

I suppose here you just used the interpreter, this way CLISP will only 
lookup the foreign functions when trying to execute.


> [3]> (cffi-examples:sqrtf 5)
>
> *** - FFI::FOREIGN-LIBRARY-FUNCTION: no dynamic object named "sqrtf" in
>       library :DEFAULT
>
> *** - FFI::FOREIGN-LIBRARY-FUNCTION: no dynamic object named 
> "gettimeofday" in
>       library :DEFAULT

But the real problem is that sqrtf and gettimeofday are UNIX only, they 
don't exist in Windows. Well at least not in the C library your CLISP 
is using.

Thanks for your interest in CFFI!

-- 
Luís Oliveira
http://student.dei.uc.pt/~lmoliv/
Equipa Portuguesa do Translation Project
http://www.iro.umontreal.ca/translation/registry.cgi?team=pt