Date: Wed, 13 Nov 2013 12:52:16 -0500 From: Ryan Stone <rysto32@gmail.com> To: mva@freebsd.org Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: libc++ vs. libstdc++ usage in the ports tree (was: Re: Are clang++ and libc++ compatible?) Message-ID: <CAFMmRNxk25AJ3TMuceSG=EmL3qSE9Xhk_wpL5pAD8YvZrA6gkg@mail.gmail.com> In-Reply-To: <20131113173143.Horde.a-9M7JQ_vHo3tpDIMsGK6g1@webmail.df.eu> 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>
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On Wed, Nov 13, 2013 at 11:31 AM, Marcus von Appen <mva@freebsd.org> wrote: > This brings up another point into which I am running with the previously > discussed blender issue. > > Let's assume port A_defcompiler does not specify a compiler and c++ lib, it > will default to libc++ and clang++ on 10.x or newer, correct? > If now a port B_gnuish depends on port A_defcompiler, but at the same > defines > GCC + libstdc++, the resulting binary might link against libc++ and > libstdc++ > at the same time. This in turn makes the port unusable. The same applies > to the other way around. > > Right now we do not have mechanism to detect and handle those flaws. > Maintainers > might be even less aware of those issues. Does anyone know a proper way to > deal > with this at the moment on 10.x+ or is this something that was missed until > now? How different is this from the previous situation? As I understand it previously A_defcompiler would be linked against the system libstdc++ and B_gnuish would be linked against the gccXX port libstdc++. In my experience libstdc++ does not have good ABI stability between versions so shouldn't you have the same potential for problems?
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