[gambit-list] changing the ld options on dynamically loaded files

[Bradley Lucier]

Marc:

I have the following code that used to work in an older beta of gambit:

> (define-macro (setup-loader)
>   (set! ##ld-cmd "/usr/ccs/bin/ld -G %s.o libfftw.so.2.0.5 -o %s")
>   '(begin))
>
> (setup-loader)
>
> (c-declare
> "
> #include \"fftw.h\"
>
> fftwnd_plan p;
>
> ")
>
> (define fftw2d_create_plan_backward
>   (c-lambda ()
>         void
>         "p = fftw2d_create_plan(64,
>                                     64,
>                                     FFTW_BACKWARD,
>                                     FFTW_ESTIMATE | FFTW_IN_PLACE);
>             "))
>
> (define fftw2d_create_plan_forward
>   (c-lambda ()
>         void
>         "p = fftw2d_create_plan(64,
>                                     64,
>                                     FFTW_FORWARD,
>                                     FFTW_ESTIMATE | FFTW_IN_PLACE);
>             "))
>
> ;;; Both forward and backward ffts, depends on which way the plan  
> was created.
>
> (define fftwc
>   (c-lambda (scheme-object)
>         void
>         "
> int j; double *fp = (double *)((___WORD)___BODY_AS 
> (___arg1,___tSUBTYPED));
>   fftwnd_one(p,
>              (fftw_complex *)(fp),
>              NULL);
>   for (j = 0; j < 64 * 64 * 2; j++)
>     fp[j] *= .015625;
> "))

Now I get

Gambit Version 4.0 beta 13

 >  (compile-file "all.scm")
*** ERROR IN #<procedure #2> -- Unbound variable: ##ld-cmd

and there's no ##ld-cmd in gambc40b14, either.

How can I set things up to link all dynamically loaded files against  
libfftw.so.2.0.5?

Brad