[Gc] Status of gc on Mac OS X - gc_cpp issue
hans.boehm at hp.com
Thu Oct 5 12:43:44 PDT 2006
Thanks for the recipe. Unfortunately it appears that requires some work
on the part of MacOSX clients.
For now, I documented the behavior in README.darwin, with a pointer to
> -----Original Message-----
> From: Andrew Begel [mailto:abegel at eecs.berkeley.edu]
> It's not a bug. new and delete are not overrideable on MacOSX
> without a little extra work (this behavior, btw is part of
> the C++ spec.
> You're allowed to override everything but new and delete). In
> the source code for the Harmonia project you can see how we did it:
Section 188.8.131.52 of the C++ standard actually reads to me like it's
quite explicit that operator delete(void *) may be overridden. I expect
the issue here is that the C++ standard says nothing about dynamic
libraries, and the name visibility rules there vary.
It seems that things generally just work with either
- static libraries, or
- dynamic libraries with ELF visibility rules
On other systems you're sort of on your own.
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