Re: [boost] [filesystem] 1.49 linking with c++0x

Subject: Re: [boost] [filesystem] 1.49 linking with c++0x
From: Sebastian Redl (sebastian.redl_at_[hidden])
Date: 2012-07-12 07:55:14

On 12.07.2012 12:01, Andrey Semashev wrote:
> On Thursday 12 July 2012 10:21:12 Sebastian Redl wrote:
>> You cannot safely mix and match C++03 and C++11 code with GCC no 
>> matter what libraries you use. The standard library itself breaks 
>> binary compatibility between the two versions. Boost builds on the 
>> standard library. So no change in Filesystem is going to rescue 
>> binary compatibility for you. 
> But you can build and link both C++03 and C++11 programs against libstdc++,
> can't you? So it must either contain both ABIs or have some compatibility
> layer. Why is it not possible to use both ABIs then?
>
Just did a bit of searching and found that the GCC developers actually 
delayed the ABI split so far, so it was actually possible to have 
compatible 03 and 11 versions, except that a breakage now slipped into 
4.7 (apparently earlier than indented). The reason why you can still use 
the same libstdc++ is that the breakage is in std::list, and there is no 
precompiled std::list code in the dynamic library.

http://docs.redhat.com/docs/en-US/Red_Hat_Developer_Toolset/1/html/1.0_Release_Notes/ch-Known_Issues.html

Sebastian