Re: Avoiding compiler warnings/errors with function pointers

[Gary V. Vaughan]

He Reuben,

On 4 Jun 2007, at 09:55, Reuben Thomas wrote:
> I have a line of code like this:
>
>    if ((l_fn = lt_dlsym(l_st->lth, "ladspa_descriptor")) == NULL) {
>
> where l_fn is a function pointer. gcc says:
>
> ladspa.c: In function 'sox_ladspa_getopts':
> ladspa.c:114: warning: ISO C forbids assignment between function  
> pointer and 'void *'
>
> There's no problem with this on my machine with my compiler  
> settings, but if I wanted to write strictly conforming ISO C it  
> looks like I'd have a problem; equally if I wanted this code to run  
> on a machine where void * was not compatible with a function pointer.
>
> Is there some way to avoid this problem?

What type does dlsym() return on that system?

If it is a void*, then I don't know of any portable way around it :-(

Cheers,
        Gary
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