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From: Dimitry Andric <dim@FreeBSD.org>
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To: David Chisnall <theraven@theravensnest.org>
Subject: Re: [patch][libc++]using some undeclared functions with -std=c++98,
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On 2012-11-24 11:45, David Chisnall wrote:
> On 23 Nov 2012, at 21:27, Dimitry Andric wrote:
>> Note there are also other problems when compiling libc++ with -std=c++98
>> and -std=c++03, such as complaints about namespacing and such.  I am not
>> entirely sure libc++ is fully supported yet under those restrictions. :)
>
> In theory, the libc++ headers that are part of the C++03 spec (i.e. not things like <stdatomic>) should work in C++98 / C++03 mode, however the implementation in libc++ must be compiled in C++11 mode.
>
> To upstream this patch, the __LONG_LONG_SUPPORTED flag should be unconditionally set for non-FreeBSD flags in the __config file in libc++.  This will have no functionality change on other platforms.

I have posted a proposed patch to the upstream mailing list here:

http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20121119/068587.html

If it is accepted as-is, I will merge it immediately.