[haiku-bugs] Re: [Haiku] #6793: Issues with __cxa_atexit
- From: "bonefish" <trac@xxxxxxxxxxxx>
- Date: Thu, 18 Nov 2010 12:34:09 -0000
#6793: Issues with __cxa_atexit
---------------------------+------------------------------
Reporter: kaliber | Owner: axeld
Type: bug | Status: reopened
Priority: normal | Milestone: R1
Component: Build System | Version: R1/Development
Resolution: | Keywords: gcc
Blocked By: | Has a Patch: 1
Platform: All | Blocking:
---------------------------+------------------------------
Changes (by bonefish):
* keywords: => gcc
* component: System/libroot.so => Build System
Comment:
Replying to [comment:10 kaliber]:
> Replying to [comment:9 bonefish]:
> > I see two issues with the patches:
> > - I doubt the gcc patch is sufficient. By using the shared library
glue code `__cxa_finalize()` will be called, but since gcc hasn't ever
output code using `__cxa_atexit()` I suspect it won't do that now either.
So it probably has to be enabled explicitly.
>
> I think that `--enable-__cxa_atexit` is sufficient. I've enabled it by
default for Haiku in gcc/config.gcc
Uh, sorry, I don't know how I missed that.
> > - Selecting the glue code depending on the `shared` option has the
problem that it won't work for executable add-ons -- `__cxa_finalize()`
will not be called for them.
>
> Are there executable and non-executable add-ons? For example filetype
add-on for tracker is build with `-nostart` (`-shared`), so it will work.
Replicants come to mind. They are usually implemented directly in
executables, but need to be loaded as an add-on by the host application.
There are also regular add-ons that are executable. Most of those don't
provide any actual functionality this way, though, but only show an about
box or some alert.
> If there are executable add-ons, we can introduce -addon flag for gcc.
I haven't read up on that, but `-pie` might already be supposed to have
the desired semantics. It's just not properly implemented in the gcc specs
yet.
--
Ticket URL: <http://dev.haiku-os.org/ticket/6793#comment:13>
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