I'm looking for a document which describes common changes which do not
change the ABI of a library. There are a few possible changes listed under:
<http://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html>
, but I hope there are more possibilities, such as adding a virtual
member function at the end of the class definition, assuming that the
class had any virtual member functions before, and there are no classes
deriving from it.
Recommendations for increasing the range of ABI-preserving changes
(mainly the pImpl idiom) would be welcome as well.
Does such a document exist already?
--
Florian Weimer / Red Hat Product Security Team
