OpenSceneGraph Forum

[Rodrigo]

Hi,

I'm following OpenSceneGraph 3.0: Beginner's Guide, and right at page 44 there is a CMakeLists.txt that won't work. CMake is giving the following error message:

Quote:

Could NOT find OpenThreads (missing: OPENTHREADS_LIBRARY) Could NOT find osg (missing: OSG_LIBRARY) Could NOT find osgDB (missing: OSGDB_LIBRARY) Could NOT find osgUtil (missing: OSGUTIL_LIBRARY) Could NOT find osgViewer (missing: OSGVIEWER_LIBRARY) Configuring done

The book says "make sure you have the OSG_ROOT environment variable set. Otherwise, the find_package() macro may not be able to find OSG installations correctly."

This variable is set to the directory of the build, the one which includes applications, bin, data, include, lib, packaging and src. However, the "include" directory only contains OpenThreads and osg, while /usr/local/include contains 18 directories (from a previous installation, I guess). Also, the OpenThreads in the build directory only contains two files: Config and Version, while the one in /usr/local/include contains 13 files. What have I done wrong?

Thank you!

Cheers,
Rodrigo

[LuisIzquierdo]

Hi Rodrigo. I have exactly the same problem, with the same book in this page. I am using Ubuntu 18.04. I am able to compile osg but not to run the exmple in page 44.

...


Thank you!

Cheers,
Luis

[Nathan Mielcarek]

Hi Rodrigo,

If you run make install from the build directory, all of the includes and libraries will go to the /usr/local/ directories and then you can set OSG_ROOT to /usr/local (although I believe it's already on the search path). It's good practice to not have multiple OSG versions on the search path as that can lead to potential issues.


-Nathan


On Tue, Jan 1, 2019 at 5:41 PM Rodrigo Dias < (

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)> wrote:

Quote:

Hi, I'm following OpenSceneGraph 3.0: Beginner's Guide (https://www.packtpub.com/game-development/openscenegraph-30-beginners-guide), and right at page 44 there is a CMakeLists.txt that won't work. CMake is giving the following error message: Quote: Could NOT find OpenThreads (missing:  OPENTHREADS_LIBRARY) Could NOT find osg (missing:  OSG_LIBRARY) Could NOT find osgDB (missing:  OSGDB_LIBRARY) Could NOT find osgUtil (missing:  OSGUTIL_LIBRARY) Could NOT find osgViewer (missing:  OSGVIEWER_LIBRARY) Configuring done The book says "make sure you have the OSG_ROOT environment variable set. Otherwise, the find_package() macro may not be able to find OSG installations correctly." This variable is set to the directory of the build, the one which includes applications, bin, data, include, lib, packaging and src. However, the "include" directory only contains OpenThreads and osg, while /usr/local/include contains 18 directories (from a previous installation, I guess). Also, the OpenThreads in the build directory only contains two files: Config and Version, while the one in /usr/local/include contains 13 files. What have I done wrong? Thank you! Cheers, Rodrigo[/url] ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=75371#75371 _______________________________________________ osg-users mailing list ( Only registered users can see emails on this board! Get registred or enter the forums! ) http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

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[Rodrigo]

Hi,

Well, I formatted my computer and installed a new Debian version (9.6). Installed a fresh copy of OSG, but still got the same error. Probably there's some variable missing, but since nobody tells us which variable it is, I said "f*** cmake" and compiled from command line. I've tried adding an OSG_ROOT variable, pointing to /usr/local, /usr/local/lib and /usr/local/lib64. None worked.

This command line works:

Code:

g++ main.cpp -lOpenThreads -losg -losgDB -losgUtil -losgViewer -o main

Even this works:

Code:

g++ main.cpp -losg -losgDB -losgViewer -o main

Thank you!

Cheers,
Rodrigo