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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 >

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