[cfe-dev] Build-bot host compiler upgrades and C++11!

Eli Bendersky eliben at google.com
Tue Jan 14 09:39:13 PST 2014

On Sun, Jan 12, 2014 at 10:02 PM, Chandler Carruth <chandlerc at gmail.com>wrote:

> On Sun, Jan 12, 2014 at 9:42 PM, Nico Weber <thakis at chromium.org> wrote:
>> On Tue, Jan 7, 2014 at 5:09 PM, Nico Weber <thakis at chromium.org> wrote:
>>> On Tue, Jan 7, 2014 at 1:44 AM, Chandler Carruth <chandlerc at gmail.com>wrote:
>>>> Greetings, I'm trying CC-ing all the folks I could think of that are
>>>> likely running bots for Clang. If I've missed any, sorry, please add them.
>>>> As you may have heard on various lists, it's time to switch Clang (and
>>>> LLVM) to use C++11. The first step is establishing a new baseline of
>>>> compiler versions that are supported[1]:
>>>> MSVC 2012
>>>> GCC 4.7
>>> Does this mean clang with require libstdc++4.7 too? Or can gcc 4.7
>>> target libstdc++ 4.6 somehow?
>> ^ ping
> Yes. Part of the reason to pick GCC 4.7 is because its standard C++
> library has a reasonably well tested and correct implementation of a large
> amount of the C++11 standard library. The standard library improvements wil
> lbe among the most dramatic as those have been widely implemented for
> longer in MSVC.

Chandler, as of this morning ToT builds fine when I point CC and CXX to the
Clang 3.4 release binaries. However, it's unlikely that Clang 3.4 picks up
libstdc++4.7, because I did not install it.

Are you going to force the libstdc++ version too in the configure/cmake
checks at some point?

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