On x64 MSVC platform, macro PROTOBUF_LITTLE_ENDIAN won't be set

[LitingLin]

Is this intentional?
The cause is that _M_IX86 is undefined when target x64 processor.
The relative code is in File io/coded_stream.h, Line 115

[xfxyjwf]

I'm pretty sure it's a bug. The code in io/coded_stream.h should be updated (or just removed) in favor of the definition in port.h: https://github.com/google/protobuf/blob/master/src/google/protobuf/stubs/port.h#L49

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[LitingLin]

_M_AMD64 will be defined on AMD64 platform and won't be defined on IA64 or ARM.
I think this is a perfect solution.

[LitingLin]

Okay, I signed it!

[googlebot]

CLAs look good, thanks!

[xfxyjwf]

Please update this to be the same as in port.h:
https://github.com/google/protobuf/blob/master/src/google/protobuf/stubs/port.h#L49

From what I gathered, windows always uses little-endian:
http://stackoverflow.com/questions/6449468/can-i-safely-assume-that-windows-installations-will-always-be-little-endian

[LitingLin]

OK, updated. Thanks

[xfxyjwf]

Thanks!