Comments on: How to compile OpenSceneGraph 2.x using MinGW/MSYS

By: Laurence Muller

Laurence Muller — Thu, 11 Mar 2010 22:09:34 +0000

Hi dashesy,

it would be nice if OSG would provide offical binaries build with MinGW (Qt/Trolltech are providing both VS and MinGW binaries for windows users)

For the time being I will just post my own builds build with GCC 4.4.0 (from Trolltech).

About your error, it is not possible to mix C++ libraries from different compilers.

By: dashesy

dashesy — Tue, 23 Feb 2010 20:37:27 +0000

Thanks for the info!
I was going to use dlltools to make some .a files from .lib files before I found your blog in the same link that you provided. I think similar to VS9 and VS8 there should be an official release for MingWin specially because many people like me use OSG with QT and are lazy not to build from the source themselves!

When I use the release version from here:
http://www.openscenegraph.org/downloads/stable_releases/OpenSceneGraph-2.8.2/binaries/Windows/VisualStudio9/
I get so many “undefined reference to” problems in the linking like (…/osg/OpenSceneGraph-2.8.2/include/osg/Referenced:147: undefined reference to `_imp___ZN11OpenThreads6AtomicppEv’ or ‘_imp___ZN3osg10ReferencedD2Ev’ or so many others)

I tried both with “-L$${OSGHOME}/lib -l$${libname}” and also without “-l” option with $${libname}.lib, with no luck. I appreciate if you shed some light into this.

However with .a files that you have provided the build works like a charm.
I am using gcc 4.4.0 BTW

By: Laurence Muller

Laurence Muller — Mon, 22 Feb 2010 23:42:05 +0000

Just a small update:
The section “Patching OpenSceneGraph” is not anymore required if you’re using the source code from the SVN (trunk). It has already been patched.

Discussion: http://groups.google.com/group/osg-users/browse_thread/thread/73979e5d65302e93?tvc=2

Bugfix: http://thread.gmane.org/gmane.comp.graphics.openscenegraph.cvs/6738

By: Laurence Muller

Laurence Muller — Mon, 22 Feb 2010 23:38:58 +0000

@dashesy

Unfortunately it is not possible to mix libraries from different compilers (Ok, there are some exception with C libraries, but that probably won’t apply for osg).

Actually Jean-Sebastien Guay added a link here http://www.openscenegraph.org/projects/osg/wiki/Support/PlatformSpecifics/Mingw

Did you used the pre-built libraries from http://www.openscenegraph.org/projects/osg/wiki/Downloads/Dependencies ? The VisualStudio 9 (2008) SP1 files should work (be sure to update your compiler), if they don’t what error message do they show?

By: dashesy

dashesy — Mon, 22 Feb 2010 22:45:34 +0000

Thank you for the nice information! That is exactly what I was looking for.
I was trying to use the pre-built libraries (.lib files for visual studio) with many linking problems.
That would be nice if you add an entry to wiki:
http://www.openscenegraph.org/projects/osg/wiki/Downloads
for your MingWin binaries.
The VS9 compiled libraries can not be directly used with MingWin I guess, I appreciate if you share any experience/solution regarding this.

Thank you again!

By: Alvaro

Alvaro — Fri, 12 Feb 2010 11:53:19 +0000

Thanks Laurence! Really useful How To

By: John Montgomery

John Montgomery — Tue, 12 Jan 2010 09:28:37 +0000

Thanks for this Laurence!