Why central builds are performed on 10.1 with broken/different compared to 10, 3 compiler?

[Dimitry Andric]

On 18 Jun 2016, at 19:13, Yuri <yuri at rawbw.com> wrote:
> 
> I regularly get the fallout messages for my net-im/ring-daemon port. It breaks on 10.1 with the c++11 -related message:
> 
> In file included from /wrkdirs/usr/ports/net-im/ring-daemon/work/ring-daemon-56ec56f/src/manager.h:45:
> /wrkdirs/usr/ports/net-im/ring-daemon/work/ring-daemon-56ec56f/src/account_factory.h:121:107: error: chosen constructor is explicit in copy-initialization
>        std::map<std::string, std::function<std::shared_ptr<Account>(const std::string&)> > generators_ = {};
>                                                                                                          ^~
> /usr/include/c++/v1/map:838:14: note: constructor declared here
>    explicit map(const key_compare& __comp = key_compare())
> 
> 
> net-im/ring-daemon doesn't break on 10.3 system though. It has USES=compiler:c++14-lang.
> 
> There are two questions:
> 1. Why clang36 works differently on 10.1 and 10.3?

In this particular case, because 10.1 doesn't have r278724 [1], which
updated libc++ in stable/10 to the latest version in head.

This was an upstream libc++ bug [2], fixed in upstream r202994 [3].

I think this can be worked around by removing the '=' sign, but I can't
verify it at the moment.

-Dimitry

[1] https://svnweb.freebsd.org/changeset/base/278724
[2] https://llvm.org/bugs/show_bug.cgi?id=15724
[3] http://llvm.org/viewvc/llvm-project?view=revision&revision=202994

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