On 06/09/2014 04:18 AM, Konrad Rosenbaum wrote: > Hi, > > On Sunday 08 June 2014 19:28:34 Bill Crocker wrote: >> I am upgrading a project from Qt 4.7.1 to Qt 4.8.6 >> When I build this project on Windows, I now see this: >> >> c:\qt\4.8.6\include\qtcore\../../src/corelib/global/qconfig.h(46) : >> warning C4005: 'QT_LARGEFILE_SUPPORT' : macro redefinition >> command-line arguments : see previous definition of >> 'QT_LARGEFILE_SUPPORT' >> >> I am building in VisualStudio 2008 C++ >> from an import of my .pro file. >> >> Does anyone know what might be causing this? > > As the friendly warning is telling you: QT_LARGEFILE_SUPPORT is defined both > in qconfig.h and on the commandline given to your compiler.... ;-) > > Short answer: ignore this one, it is harmless. > > Long answer: > > qconfig.h contains platform configurations for Qt, most command line > parameters come from the mkspec of your platform. Both describe how your > platform behaves in regards to Qt. For some odd reason this define appears > in both without a guard. > > As said above: it is harmless. Your compiler is just a bit picky about > preprocessor symbols. > > If you absolutely and positively cannot live with this warning: > > A quickfix would be to include this _before_any_Qt_includes_(!!) in the cpp- > file that has this problem: > > #ifdef QT_LARGEFILE_SUPPORT > #undef QT_LARGEFILE_SUPPORT > #endif > > A more robust fix would be to put this into the beginning of qconfig.h. > > It's important that this #define happens at least once, otherwise you'll > have trouble handling big files. >
Thanks. I was just surprised to see this. It leads me to believe that something is not installed correctly. Why would this appear in an X.8.6 (mature?) release. Bill _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
