Date: Sun, 8 Sep 2013 14:57:01 +0200 From: Dimitry Andric <dim@FreeBSD.org> To: O. Hartmann <ohartman@zedat.fu-berlin.de> Cc: freebsd-current@freebsd.org, kde@FreeBSD.org, freebsd-ports@freebsd.org, rakuco@FreeBSD.org Subject: Re: ports/181913: devel/qt4-script: /usr/include/c++/v1/type_traits:3175:22: error: call to 'swap' is ambiguous Message-ID: <0F2C94E4-A544-482F-A479-B7E70D49E615@FreeBSD.org> In-Reply-To: <20130908081445.242f77c7@thor.walstatt.dyndns.org> References: <201309072249.r87MnsLP052803@freefall.freebsd.org> <20130908081445.242f77c7@thor.walstatt.dyndns.org>
next in thread | previous in thread | raw e-mail | index | archive | help
--Apple-Mail=_C8BC834B-D4B4-499A-B3FB-15B8AF6524A7 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii On Sep 8, 2013, at 08:14, O. Hartmann <ohartman@zedat.fu-berlin.de> wrote: > On Sat, 7 Sep 2013 22:49:54 GMT > rakuco@FreeBSD.org wrote: > >> Synopsis: devel/qt4-script: /usr/include/c++/v1/type_traits:3175:22: >> error: call to 'swap' is ambiguous >> >> State-Changed-From-To: open->patched >> State-Changed-By: rakuco >> State-Changed-When: Sat Sep 7 22:47:43 UTC 2013 >> State-Changed-Why: >> I don't think the previous version worked. >> >> From your description, it looks like you've switched to building with >> libc++ whereas libstdc++ was being used before. >> >> The upcoming Qt 4.8.5 plus a few patches which only made it to 4.8.6 >> (but we've backported) will finally make Qt build with libc++. >> >> We've just sent an exp-run request for Qt 4.8.5, and will hopefully >> fix all these errors once it is committed. >> >> http://www.freebsd.org/cgi/query-pr.cgi?pr=181913 > > I build the world/kernel since early this year with > > CXXFLAGS+= -stdlib=libc++ > CXXFLAGS+= -std=c++11 > > > in /etc/src.conf. I do not use those flags > in /etc/make.conf! /etc/src.conf is supposed to target ONLY > the /usr/src world, not the ports - this is as I interpret the man page > for /etc/src.conf and it would be logical. But this rule/thinking seems > to be broken by some includes from /usr/ports/Mk ingredients. Since r255321, -stdlib=libc++ is effectively the default, at least when you haven't set gcc as the default compiler. So it also applies to ports, which unavoidably will lead to a bit of fallout. My personal experience is that most C++-based ports compile fine with libc++ instead of libstdc++, except for a few that rely on internal libstdc++ details. However, -std=c++11 is *not* yet the default, and C++11 has different rules here and there, so some ports might fail to compile due to this. For some ports, too much hacking may be required to make them work with C++11. So in case of trouble, try removing -std=, or setting it to different values (c++0x, c++98, gnu++98, etc), to get the port to compile. Note the base system should have no problems with -std=c++11, so please continue to use the option in src.conf, and report any problems if you encounter them, so we can fix them. :-) -Dimitry --Apple-Mail=_C8BC834B-D4B4-499A-B3FB-15B8AF6524A7 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 v2.0.20 (Darwin) iEYEARECAAYFAlIsdCkACgkQsF6jCi4glqPYZACglByQgm4RM9TvDepRBC7a4YCt pSwAn0nuDJ0yz18iVzHCe0NBGs7AV3EQ =qYED -----END PGP SIGNATURE----- --Apple-Mail=_C8BC834B-D4B4-499A-B3FB-15B8AF6524A7--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?0F2C94E4-A544-482F-A479-B7E70D49E615>