[osg-users] [build] OSG 3.4.0 Build with Visual C++ 2015

[Sebastian Messerschmidt]

Am 18.04.2016 um 08:59 schrieb Stuart Mentzer:
> Hi,
>
> After some struggle I have managed to make a cookbook for building OSG with Visual C++ 2015. This is very exciting because I should finally be able to build our structural impact modeling application on Windows. There are a few items that would be great to get some feedback on:
>
> For best (release build) performance would it make sense to use /fp:fast (along with /O2 /GS-) or could this create problems with propagation of the NaNs that can arise in OSG?
That might cause precision problems at least I think I noticed some 
rounding errors when using geocentric databases.

>
> Would trying to build with Intel C++ likely to give significantly better performance? This is probably a question of whether OSG would benefit from its better auto-vectorization.
It makes more to activate AVX. This gave me some noticeable speed-up 
even with the MS-compiler. It will totally depend on your scene-graph 
too. So without benchmarking it is hard to tell.
> If I stick with the VC++ 2015 OSG build I should be OK linking my application built with Intel C++ 2016 to it since they seem to be binary compatible, right?
Usually the Intel compiler beats the MS-compiler by a few percent, but 
they use different ABI (at least they did a year ago), If they are still 
incompatible you cannot link them. You have to build everything with the 
same compiler chain.
>
>
> Since I'll need to build future OSG releases I am willing to host the Windows OSG (starting with 3.4.0) binary packages on our company website if someone on the OSG team wants to add a link to it on the Stable Releases page. Just let me know who best to contact.

>
> Thank you!
>
> Cheers,
> Stuart[/list]

Cheers
Sebastian
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=66848#66848
>
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