Hi, this was discussed while ago for different versions of Visual Studio and there was a work around (which was not forcing to use force:multiple). Might be worth to look in the archive
On Mon, Aug 8, 2016 at 10:52 AM, Sebastian Messerschmidt < sebastian.messerschm...@gmx.de> wrote: > Hi James, > > I haven't dived into the details yet, but I strongly advertise for a fix, > since this is a great polluter in our build-process too (Visual studio > doesn't let you filter some warnings). > > > Cheers > Sebastian > > > Hello, >> >> With recent MSVC versions, we’re obliged to use /FORCE_:MULTIPLE, to work >> around the fact that osgDB.lib includes symbols from std::fstream classes, >> which then causes conflicts when other object files in a target (eg >> executable) being linked use <fstream> classes. This slows down linking >> since incremental linking is disabled, and makes our build output very >> noisy. >> >> After some discussion, I came up with the following fix: >> >> https://github.com/zakalawe/osg/commit/2098c022283f1afeb4bad >> 0ffb4b682b884cc8f32 >> >> The idea is to only export the non-inlined symbols from osgDB::ofstream >> and ::ifstream, but not to export the entire class, since doing so forces >> MSVC to also export the constructor and destructor for the base class >> (std::ofstream and std::ifstream). >> >> Since we don’t use the osgDB versions of fstream in FlightGear, I can’t >> check if this is backwards compatible for other Windows OSG users, but I am >> hopeful that it is, and hence that this approach could be upstreamed. >> >> Kind regards, >> James >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- trajce nikolov nick
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