Feature request: dlopen(NULL, ...

I would like to be able to call functions using dynamic FFI in the program into which ECL has been embedded.

In Linux, you can do this by calling dlopen with NULL for the filename.

If filename is NULL, then the returned handle is for the main program.

http://man7.org/linux/man-pages/man3/dlopen.3.html

Looking at ECL source code, it does not seem to be supported. dlopen is called in c/ffi/libraries.d like this:

  char *filename_string = (char*)filename->base_string.self;
#ifdef HAVE_DLFCN_H
  block->cblock.handle = dlopen(filename_string, RTLD_NOW|RTLD_GLOBAL);

So, I guess there's no way to set filename_string = NULL.

One way to do it would be to say if you call

(ffi:load-foreign-library "")

Then it will skip the checks to see if the file exists and just call dlopen(NULL, ...

Another way would be to make a new function ffi:load-main-program. I don't have any suggestions as to which would be better as I am very new to Lisp.

Thank you for your attention.