Re: Calling Lisp from C (SBCL as a shared object)

Try SBCL-LIBRARIAN:

https://github.com/quil-lang/sbcl-librarian

https://lispcookbook.github.io/cl-cookbook/dynamic-libraries.html

Robert



On Fri, Jan 17, 2025 at 21:02 J. Gareth Williams <[email protected]>
wrote:

> Hi,
>
> I have been struggling to get even a trivial example of
> DEFINE-ALIEN-CALLABLE to work, and was wondering if anyone could take a
> look at what I might be doing wrong.
>
> Full source:
>     git clone https://gitlab.com/garethw14/simple-sbcl-alien-callable.git
>
> It compiles okay and links, but on initialize_lisp(), I land in the
> debugger:
>
> ---
> In main, about to initialize_lisp()
>
> debugger invoked on a SB-KERNEL::UNDEFINED-ALIEN-VARIABLE-ERROR in thread
> #<THREAD "main thread" RUNNING {10013A8003}>:
>
> *  Attempt to access an undefined alien variable.*
> Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.
>
> restarts (invokable by number or by possibly-abbreviated name):
>   0: [ABORT] Exit from the current thread.
>
> ("foreign function: call_into_lisp_")
> 0]
> ---
>
> I've tried some other examples I've found around the web, but they seem to
> yield the same result.
>
> Tested on Debian 12.9, SBCL versions 2.5.0 and 2.3.2
>
> Would appreciate any insight!
>
> gareth
>
>
>
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