Re: Lua shared object asymmetry loading Xlib.

[Joerg Sonnenberger <joerg%bec.de@localhost>]

On Sun, Jan 20, 2019 at 11:29:29AM +0100, Marc Balmer wrote:
> 
> 
> > Am 20.01.2019 um 11:14 schrieb Kamil Rytarowski <n54%gmx.com@localhost>:
> > 
> > On 20.01.2019 11:03, Martin Husemann wrote:
> >> On Sun, Jan 20, 2019 at 10:32:43AM +0100, Kamil Rytarowski wrote:
> >>> I find it as workaround of our libc behavior.
> >> 
> >> I disagree, there is no clean way to implement the call-on-dlclose
> >> semantics (i.e. it needs disgusting ld.elf_so hacks and layer violations).
> >> 
> >> But maybe we should document the __cxa_atexit interface or provide a
> >> public version?
> >> 
> > 
> > libc++abi does not support a public interface to __cxa_atexit.
> > 
> > It's also documented as being an internal API, so in my opinion without
> > need for a documentation.  It could be mentioned in atexit(3).
> 
> 
> One could argue that libraries should not use atexit() at all, but use _fini() to their clean up tasks.  Dunno hwo portable that is, however.

That's essentially one of the two suggestion options. Using a global
destructor or using __cxa_atexit.

Joerg