Windows and "error C2872: 'byte' : ambiguous symbol"

[noloader]

We are experiencing the following when compiling under Visual Studio 2012 with a Windows Kit installed. test.cpp has a using namespace CryptoPP.

The practical problem for us is, main must not be in a namespace. It looks like we need to proxy main. That is, we provide an global main for C++, and then a CryptoPP::Test::main to avoid using namespace CryptoPP. Also see Windows and "error C2872: 'byte' : ambiguous symbol" on the user list.

2>  test.cpp
2>test.cpp(461): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(480): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(566): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(584): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(595): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(618): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(630): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(631): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(632): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(636): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(686): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(687): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(688): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(692): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'
2>test.cpp(863): error C2872: 'byte' : ambiguous symbol
2>          could be 'c:\program files (x86)\windows kits\8.0\include\shared\rpcndr.h(164) : unsigned char byte'
2>          or       'c:\users\cryptopp-fork\config.h(203) : CryptoPP::byte'

Also see Test C++17 byte change with dry runs from various projects

[noloader]

Triaged at Commit 00e133745663.

Cleared by proxying main at Commit 34c4c9f1bd6a.