[LLVMdev] Switching to the new MingW ABI

[Reid Kleckner]

It's worth noting that gcc chose *not* to support any ABI changing flags.

I'm in favor of avoiding flags here.  We can simply document that clang 3.3
and earlier works with gcc 4.6 and earlier, and clang 3.4+ works with gcc
4.7+.


On Mon, Dec 9, 2013 at 5:18 PM, Rafael Espíndola <rafael.espindola at gmail.com
> wrote:

> Mingw switched abis with the release of gcc 4.7
> (http://gcc.gnu.org/gcc-4.7/changes.html). The main change is that now
> mingw (like msvc) given thiscall calling convention to methods by
> default.
>
> I think the last bug blocking us to support the new abi has just been
> fixed. The question now is how to switch.
>
> The attached patches simply switch llvm and clang to the new ABI. This
> is similar to what gcc did on 4.7. The timing is also good as we will
> not build with 4.6 anymore when we switch to c++11.
>
> Is anyone depending on targeting the 4.6 mingw ABI even after we drop
> support for building with 4.6?
>
> Cheers,
> Rafael
>
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