[jira] [Created] (XERCESC-2033) Define _WIN32_WINNT for min supported version of Windows

["Lee Doron (JIRA)" <xe...@xml.apache.org>]

Lee Doron created XERCESC-2033:
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             Summary: Define _WIN32_WINNT for min supported version of Windows
                 Key: XERCESC-2033
                 URL: https://issues.apache.org/jira/browse/XERCESC-2033
             Project: Xerces-C++
          Issue Type: Improvement
          Components: Build
    Affects Versions: 3.1.1
         Environment: Windows
            Reporter: Lee Doron
            Priority: Minor
             Fix For: 3.1.2


Microsoft makes changes to the Windows API with each OS release. These changes are reflected in the Windows SDK header files, which contain conditional code according to the minimum version of Windows you wish to support. This can be selected by defining preprocessor symbols -- see http://msdn.microsoft.com/en-us/library/aa383745.aspx. The macro _WIN32_WINNT is sufficient, or for finer granularity (by service pack), you can also define NTDDI_VERSION. When you don't define these, they get set in sdkddkver.h to the latest version supported by the SDK; for VS 2012, that's Windows 8.0. If you use any APIs that have changed in recent versions, then the DLL might not work properly with older versions of Windows (e.g. XP).

I haven't actually seen any failures with Xerces, which is why I didn't mark this as a bug, but I think you should add this symbol to the preprocessor definitions to be on the safe side. I did it quickly in the Visual Studio configuration, or it could be done in the source code before including <windows.h>.



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