Re: FFI c-union crash (was: catch 22 compiling clisp for maxima)

[Bruno H. <br...@cl...>]

Joerg wrote:

>     (:arguments (first (c-union (c1 (c-ptr character))
>                                 (s (c-array-ptr character))))

Support for unions as argument/result types is not implemented in ffcall.
I.e. avcall and vacall support structs as arg/result types halfway (it
works on some platforms and doesn't on others), and unions are your
own bet. I don't even know what parameter passing conventions are used
by the C compiler for unions. The recommended workaround is to pass
pointers to unions or structs; this is fully supported.

Bruno