[cmucl-imp] ignore-errors for missing foreign functions

[Raymond Toy]

It would be great if you could file an issue for this at
https://gitlab.common-lisp.net/cmucl/cmucl/issues.

Then it won't get lost.  If you can't, that's ok.  I'll try to fill out an
issue.

It will take me a couple days to get around to looking at this.

On Sun, Jan 27, 2019 at 6:41 PM Anton Vodonosov <avodonosov at yandex.ru>
wrote:

> Hello CMUCL list,
>
> Code like this:
>
>     (ignore-errors
>      (cffi:defcfun ("SSL_CTX_set_default_verify_dir"
> ssl-ctx-set-default-verify-dir)
>          :int
>        (ctx :pointer)))
>
> fails despite ignore-errors if the foreign function is absent (the
> libssl.so version loaded doesn't have it).
>
> It fails when the fasl file containing this code is loaded:
>
>    KERNEL:SIMPLE-PROGRAM-ERROR: Undefined foreign symbol:
> "SSL_CTX_set_default_verify_dir"
>
> I wanted to look in the manual, but the manual links provided at
> https://www.cons.org/cmucl/doc/index.html are broken (e.g.
> http://common-lisp.net/project/cmucl/doc/cmu-user/,
> http://common-lisp.net/project/cmucl/doc/cmu-user-html.tgz)
>
> The same failure even if we modify the code this way:
>
>     (when nil
>      (cffi:defcfun ("SSL_CTX_set_default_verify_dir"
> ssl-ctx-set-default-verify-dir)
>          :int
>        (ctx :pointer)))
>
> Is there a way to not fail when the function is absent?
>
> Best regards,
> - Anton
>
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>


-- 
Ray