Hey Morgan,

could you add the reference - which blog post? And post the actual code you used?

You can find sample C code here: https://github.com/earl-ducaine/stupid-ecl-tricks-1 with swank example. Also in git repository there is subdirectory examples/, although be aware that examples in directory embed/ are temporaliry broken wrt initializing ECL produced libraries[1].

Crude sample:

#include <stdio.h> #include <ecl/ecl.h>

int main (int argc, char **argv) { /* Initialize ECL */ cl_boot(argc, argv);

cl_eval(c_string_to_object("(format t "Hello world")"));

cl_shutdown(); return 0; }

Call to cl_load should look as follows (borrowed from Earl's tricks):

cl_object cl_start_swank_path = c_string_to_object("foo.lisp"); cl_object cl_load = ecl_make_symbol("LOAD","CL"); cl_funcall(2, cl_load, cl_start_swank_path);

Best regards, Daniel

[1] https://gitlab.com/embeddable-common-lisp/ecl/issues/177

Morgan Howe writes:

Hey guys,

I'm playing around with embedding ECL into a C program. I've followed the blog post which was very useful, but as far as calling lisp functions, didn't really get beyond the cl_safe_eval type operations. I'd like to be able to get a handle to a specific lisp function, and call that function passing some arguments. What I've tried is basically this series of steps (omitting boot, shutdown, etc for brevity):

• cl_safe_eval some code doing (load "foo.lisp") // From the blog

example, works fine

• ecl_make_symbol("BAR", "CL-USER") // Quite sure this is where I'm going wrong
• cl_funcall the symbol from step 2, which gives me this a few times

before dropping to debugger: Condition of type: SIMPLE-ERROR 0 is an illegal frs index. No restarts available.

I'm sure step 2 is where I'm going wrong and the symbol I try to retrieve is not valid, thus the issue in step 3. Sorry if this is too basic a question, but could someone give me a working example of doing something like this?

Thanks, Morgan