[patch] Delay __fastcall attribute checking utnil after merging declarations

[Reid Kleckner]

On Tue, Aug 19, 2014 at 10:40 AM, Nico Weber <thakis at chromium.org> wrote:
>
> I did give it a try, and rejecting stdcall fires on Windows SDK headers:
>
> ...win8sdk/Include/um\imm.h(432,13) :  error(clang): function with no
> prototype cannot use stdcall calling convention
> BOOL WINAPI ImmDisableLegacyIME();
>             ^
>

Bummer. :( We could make it a default error warning, thereby suppressing it
in system headers, I guess.


> So the same mechanism doesn't work for stdcall. We could do the same thing
> for thiscall, but if msvc rejects that in C files, we should probably just
> do that too?
>

GCC allows __attribute__((thiscall)) in C mode. I don't think it's worth
the complexity of diagnosing this differently in different modes.
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