[foreign] road to posix

[Florian Weimer]

On 05/29/2018 03:12 PM, Maurizio Cimadamore wrote:
> There was a minor surprise though: the dlfcn header defines a bunch of 
> constants which are necessary in order to work with the library; my 
> example above uses RTLD_DEFAULT. Unfortunately, such constants are 
> (unsurprisignly) defined as this:
> 
> ```
> # define RTLD_DEFAULT   ((void *) 0)
> ```
> 
> Since Jextract doesn't understand these, these constants are omitted 
> from the jextract output.

It's not entirely unlikely that RTLD_DEFAULT will turn into a function 
call in the future.  MB_CUR_MAX is an existing example for that.

Furthermore, <dlfcn.h> is very special because functions like dlopen and 
(particularly) dlsym are expected to be caller-sensitive in the sense 
that they give different results depending on which DSO calls them.  So 
they are very difficult to wrap properly.

Thanks,
Florian