Сборка под Windows XP с Qt 5.1.1 и Visual Studio 2012 - теперь и 64 бита

win32 {
    contains(QMAKE_TARGET.arch, x86_64) {
        QMAKE_LFLAGS += /SUBSYSTEM:CONSOLE,5.02
        LIBS *= -L"%ProgramFiles(x86)%/Microsoft SDKs/Windows/7.1A/Lib/x64"
    } else {
        QMAKE_LFLAGS += /SUBSYSTEM:CONSOLE,5.01
        LIBS *= -L"%ProgramFiles(x86)%/Microsoft SDKs/Windows/7.1A/Lib"
    }

    QMAKE_CXX += /D_USING_V110_SDK71_
    INCLUDEPATH += "%ProgramFiles(x86)%/Microsoft SDKs/Windows/7.1A/Include"
}