Embedding K/Kona interpreter

[Greg S]

Hi,

Looking back at the list I see a little bit of effort has been made recently to make a Kona shared library with a definitive C API. I'm wondering if it's in a usable state yet. 

I'm having a bit of trouble getting my bearings in the code and haven't identified the main entry point to the interpreter yet which isn't a great start :/ Also, I tried doing "make kapi-test" and running it but I immediately got a seg fault as X(".pi") seems to be returning a 32-bit integer rather than a pointer. In fact there are a number of warnings like this that might be related:

src/kapi-test.c:72:4: warning: incompatible integer to pointer conversion assigning to 'K' (aka 'struct k0 *') from 'int' [-Wint-conversion]

        a = X(".z.y");

          ^ ~~~~~~~~~

How easy would it be to make use Kona as a simple embedded interpreter currently?

[Bakul Shah]

I added the original code for libkona about 4 years back but
haven't done anything with it since then.

kapi-test passes its tests on arm and x86 but not on x86_64.
Adding the below externs does the trick on both FreeBSD & OSX
(and should work on other platforms):

extern K X(S);
extern K show(K);
extern I attend();
extern void boilerplate();

I will try to submit a pull request with a few more fixes.
IIRC, last when I left it, there was still some issue about
the sfn() function so need to do some testing. Do let me know
if you discover any new issues.

Thanks
Bakul