[Gsll-devel] clisp&cffi: broken foreign functions in saved images

[Sam Steingold]

Hi,

I do this:

$ clisp -x '(asdf:operate 'asdf:load-op :gsll)
(saveinitmem "gsll" :executable t)'
$ ./gsll
 >
 > (gsll:make-chebyshev 1)
FFI::FOREIGN-CALL-OUT: no dynamic object named "gsl_cheb_alloc" in library
      :DEFAULT

this indicates a bug somewhere between cffi and gsll.
specifically, the definition of the foreign function gsl_cheb_alloc should 
specify that it is to be found in "libgsl.so", not in :default.

moreover, when I do the (not so) trivial thing:

(ffi:default-foreign-language :stdc)
(ffi:open-foreign-library "libgslcblas.so")
(ffi:def-call-out gsl_cheb_alloc (:library "libgsl.so")
  (:arguments (n ffi:int)) (:return-type ffi:c-pointer))
(gsl_cheb_alloc 10)
;; ==> #<FOREIGN-ADDRESS #x0000000005503380>
(saveinitmem "foo" :executable t)
(quit)

./foo
(ffi:open-foreign-library "libgslcblas.so")
(gsl_cheb_alloc 10)
#<FOREIGN-ADDRESS #x0000000001D9F4C0>

i.e., if the foreign function definition includes the correct library name,
the function will work automatically[*] even in the saved image.

So, since I am not quite sure where the bug is hiding,
I am reporting this to both gsll and cffi lists.

Thanks.
Sam.

[*] apparently, libgsl.so cannot be loaded before libgslcblas.so is.
how do people specify such dependencies?!