[cfe-dev] [RFC][Clang] Flag for Switching between C++ ABIs

[Leonard Chan via cfe-dev]

Should it be specific to the C++ ABI though? Or should there be an
> equivalent for C ABI? (Example: The LLVM 68000 back-end that's in progress
> currently targets the SVR4 ABI, but users of the compiler will definitely
> want support for Amiga, Atari, classic Mac OS, Sun, HP, etc. ABIs.) I
> suppose for C this is implied by the target triple, but it might be useful
> to have a separate switch for it.
>

I'm not opposed to having an equivalent C flag for controlling C ABIs. I
figured we could start off with one for C++ then incrementally add more
options as people demand them.
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