[cfe-dev] C++ Language Support Library

[Chris Lattner]

On Nov 10, 2008, at 4:50 AM, Doug Gregor wrote:

> Hi Sebastian,
>
> On Sun, Nov 9, 2008 at 11:23 AM, Sebastian Redl
> <sebastian.redl at getdesigned.at> wrote:
>> Hi,
>>
>> Regarding the C++ language support library, there are a few issues  
>> that
>> I'd like to raise. Please note that this is only about the language
>> support part of the C++ standard library.
>>
>> 1) Which support library do we use?
>> There are basically two options here. We can write our own, or we can
>> use libsupc++ from GCC.
>
> The licensing issues dominate, so we'll have to write out own. The
> good news is that the primary entry points to libsupc++ are mainly
> those functions required by the Itanium C++ ABI that GCC implements,
> which is specified here:
>
>  http://www.codesourcery.com/public/cxx-abi/abi.html
>
> If we follow that, and allow for some tweaking, we should be able to
> maintain compatibility with GCC.

What are the potential license issues of using libstdc++?  While we  
could require a different implementation, it would really be nice for  
clang to also/optionally support libstdc++.  Is there some strange  
wording in the library license?

-Chris