我正在使用 Poco 开发一个 SDK（作为动态和静态库），我想将 Poco 静态库嵌入到我的 SDK 中，以避免最终用户设置和链接 Poco 环境。MySDKd.LIB 的 C/C++ 设置为：
/I"..\..\..\include"
/I"..\..\..\src"
/I"D:\lib\boost_1_53_0\"
/I"..\..\..\thirdparty"
/I"..\..\..\thirdparty\protobuf\include\"
/ZI /nologo /W3 /WX- /Od /Oy-
/D "WIN32" /D "_DEBUG" /D "_LIB"
/D "WIN32_LEAN_AND_MEAN" /D "_MBCS"
/D "POCO_STATIC" /D "POCO_NO_AUTOMATIC_LIBS"
/D "IBPP_WINDOWS"
/Gm /EHa /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope
/Fp"Debug\MySDKd.pch" /Fa"Debug\" /Fo"Debug\" /Fd"Debug\vc100.pdb"
/Gd /analyze- /errorReport:queue
链接器设置是：
/OUT:"D:\src\MySDK\win32\VS2010\..\..\..\bin\static\MySDKd.lib"
"libprotobufd.lib"
"PocoFoundationmdd.lib"
"PocoUtilmdd.lib"
"PocoNetmdd.lib"
"PocoXMLmdd.lib"
/LIBPATH:"D:\lib\boost_1_53_0\stage\lib"
/LIBPATH:"D:\lib\poco-1.5.1-all\lib"
/LIBPATH:"D:\src\MySDK\lib"
/NOLOGO /NODEFAULTLIB
现在，当我构建一个简单的测试项目（使用 sdk）时，我得到了链接器错误：
LINK : fatal error LNK1104: cannot open file 'PocoFoundationmdd.lib'
除非我将 Poco\lib 文件夹添加到我的测试项目的链接器路径中。
但是这个库现在应该是我的 MySDKd.lib 的一部分，对吧？
此外，当我构建我的 SDK 时，我收到此链接器警告：
PocoFoundationmdd.lib(ByteOrder.obj) : warning LNK4221: This object file does not define any previously undefined public symbols, so it will not be used by any link operation that consumes this library
PocoFoundationmdd.lib(String.obj) : warning LNK4221: This object file does not define any previously undefined public symbols, so it will not be used by any link operation that consumes this library
PocoFoundationmdd.lib(SignalHandler.obj) : warning LNK4221: This object file does not define any previously undefined public symbols, so it will not be used by any link operation that consumes this library
PocoFoundationmdd.lib(WS2_32.dll) : warning LNK4006: __NULL_IMPORT_DESCRIPTOR already defined in PocoFoundationmdd.lib(IPHLPAPI.DLL); second definition ignored
PocoFoundationmdd.lib(WS2_32.dll) : warning LNK4221: This object file does not define any previously undefined public symbols, so it will not be used by any link operation that consumes this library
PocoXMLmdd.lib(XMLString.obj) : warning LNK4221: This object file does not define any previously undefined public symbols, so it will not be used by any link operation that consumes this library
环顾四周，我找到了这篇文章 （参见“使用其他静态库构建静态库”部分），但提到这个案例，我不明白为什么会发生这种情况。
这个警告可能是我的问题的原因吗？
问候，
丹尼尔