Date: Wed, 13 Nov 2013 20:40:25 +0100 From: Dimitry Andric <dim@FreeBSD.org> To: Andriy Gapon <avg@freebsd.org> Cc: FreeBSD Current <freebsd-current@FreeBSD.org>, Ryan Stone <rysto32@gmail.com> Subject: Re: libc++ vs. libstdc++ usage in the ports tree Message-ID: <352D9465-9840-43F0-A3A9-327DC12B0967@FreeBSD.org> In-Reply-To: <5283CA3C.3080201@FreeBSD.org> References: <20131112163219.GA2834@troutmask.apl.washington.edu> <77CB2B92-216A-4C80-B033-7E582B5F0DFC@FreeBSD.org> <20131112165422.GA2939@troutmask.apl.washington.edu> <E0FE40D9-726C-4501-B31A-3622510C1C68@FreeBSD.org> <20131112175556.GA3319@troutmask.apl.washington.edu> <20131112201922.GA4330@troutmask.apl.washington.edu> <20131113173143.Horde.a-9M7JQ_vHo3tpDIMsGK6g1@webmail.df.eu> <CAFMmRNxk25AJ3TMuceSG=EmL3qSE9Xhk_wpL5pAD8YvZrA6gkg@mail.gmail.com> <5283CA3C.3080201@FreeBSD.org>
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--Apple-Mail=_483127B8-4ABE-4B28-984B-78383E7B1CC2 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On 13 Nov 2013, at 19:51, Andriy Gapon <avg@freebsd.org> wrote: > on 13/11/2013 19:52 Ryan Stone said the following: >> In my experience libstdc++ does not have good ABI stability between = versions >=20 > In my experience it does. > In either case compatibility between different versions of relatively = modern > libstdc++ version is no doubt much better than between libstdc++ and = libc++. Well, GNU libstdc++ is backwards compatible, so you can run programs originally linked against our 4.2.1 version of libstdc++.so, using the latest ports version of libstdc++.so, and they should work. (Not vice versa, but that is not a supported use case.)=20 On the other hand, different C++ standard libraries simply cannot be mixed. The internal implementations are usually completely different. This is not really news at all, certainly not to the ports people. :-) -Dimitry --Apple-Mail=_483127B8-4ABE-4B28-984B-78383E7B1CC2 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.22 (Darwin) iEYEARECAAYFAlKD1a4ACgkQsF6jCi4glqM1nQCeKCI49CEuI9/BWwOYHLHJSKAF RAUAnApgzxrwD1QYig0yMlNUxEPNBoIg =rHvu -----END PGP SIGNATURE----- --Apple-Mail=_483127B8-4ABE-4B28-984B-78383E7B1CC2--
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