pax and objc

[Armando Di Cianno]

Hello all, I have a quick question about something I'm kind of in the
dark about.

Back story: I'm trying to revitalize GNUstep on Gentoo.  Worked on
ebuilds/structure for a week or two, submitted something like 16
yesterday.   Getting good feedback.

One piece of feedback was that Objective-C doesn't play well with pax.
  I'm not exactly sure what pax is.  So, if anyone knows:
- What is the nature of the problem between pax and Objective-C?  (I'm
assuming it's going to have something to do with the library or the
runtime, and whatever protection PAX is supposed to offer for
stack/heap breakage.)
- The problem is between Objective-C support itself and PAX, yes?
gnustep-base offers support for libffi which doesn't use mprotect like
ffcall, which I understand to be a problem. (I'm uploading the newest
libffi that will work with gnustep-base to bugs.gentoo right now as
well). I wasn't sure if some were mixing "GNUstep" and "objc" in this
context.

Any information on this issue would be greatly appreciated.  I'd
really like GNUstep on Gentoo to be as solid as it can feasibly be.

__Armando Di Cianno