On 2018-04-10, at 12:02 PM, Ryan Schmidt wrote:

> 
> On Apr 10, 2018, at 13:55, Ken Cunningham wrote:

> Mixing libc++ and libstdc++ results in a link failure. Mixing old libstdc++ 
> and new libstdc++ did not previously result in a link failure; it resulted in 
> a runtime crash which was difficult to diagnose and attribute to this 
> problem. That was back before gcc5. I don't know things have changed.
> 

Mixing the old libstdc++ and the new libstdc++ usually results in a 
std::c++11__::something link failure, from what I have seen.

I have never seen a runtime crash, although I haven't been doing this for years 
and years like some of you.

Anyway, less desirable option, to be sure.

Best,

Ken

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