On 8/31/2011 22:12, Corinna Vinschen wrote:
> On Aug 31 09:54, Charles Wilson wrote:
>> On 8/31/2011 5:48 AM, JonY wrote:
>>> C++ ABI for 4.6.x has also changed for mingw* (including mingw.org)
>>> with the introduction of thiscall, not sure if this will affect
>>> Cygwin itself.
>> [...]
>> OTOH, the cygwin project DOES provide several precompiled C++
>> packages, so cygwin will probably need to do a flag day for them (when
>> cygwin-gcc-4.6 is released), but I don't think the cygwin package
>> ITSELF would be affected.
> 
> I don't think this is necessary, unless __thiscall will become default
> behaviour in g++.  However, I guess this is the responsibility of the
> gcc maintainer for a given target.  For 32 bit Cygwin I would not do it,
> for 64 bit it might make sense, though.
> 
> 
> Corinna
> 

I have always thought about mingw* and Cygwin as a tightly coupled
target, but good point, __thiscall is meant for better compatibility
with MSVC. It wouldn't be a big deal for Cygwin to stay with the current
ABI, while mingw* will move to the new default.