This is the mail archive of the mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: (C++) mangling vector types

Jason Merrill wrote:

> I think that a linear progression is sufficient, but I want an
> additional point between 2 and 3 since 2 is the current default and 3
> already has meaning.  Thus the 2.1 suggestion.

But, there's no longer a total ordering on ABIs; 3 isn't "bigger than"
2.1 anymore.  (Presumably 4 would contain both the change in 3 and the
change in 2.1, so the ordering becomes sensible from that point forward

>> Do we have another libstdc++ ABI change coming?  I'd suggest doing this
>> as -fabi-version=4, and making that the default at that point.
> We do; once C++0x is finalized we will need to switch to non-refcounted
> strings and support constant time list.size().  But I believe the plan
> is to manage that transition with namespace versioning so that old and
> new code can continue to coexist as long as they aren't actually trying
> to share affected data structures.

So, do you consider ABIv3 there only as a theoretical conformance
option?  In other words, not something we're going to make the default
in any forseeable future?  (Those aren't meant to be rhetorical
questions -- I'm just asking.)


Mark Mitchell
(650) 331-3385 x713

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]