6.13.2: Build fails: "osg.hpp: No such file or directory"

[heeplr]

Bug Report

Please answer the following questions for yourself before reporting a bug.

• I checked the documentation and the forum but found no answer.
  • that discourse URL gives unknown host error
• I checked to make sure that this issue has not already been filed.

Environment

• DART version: 6.13.2 source tarball
• OS name and version name(or number): gentoo linux
• Compiler name and version number: gcc 13.2.1
• cmake version: 3.27.9

Expected Behavior

Successful build.

Current Behavior

/var/tmp/portage_notmpfs/portage/sci-electronics/dart-6.13.2/work/dart-6.13.2/python/dartpy/gui/osg/DragAndDrop.cpp                                                                                                                            
/var/tmp/portage_notmpfs/portage/sci-electronics/dart-6.13.2/work/dart-6.13.2/python/dartpy/gui/osg/DragAndDrop.cpp:34:10: fatal error: dart/gui/osg/osg.hpp: No such file or directory                                                                                                                                                                           
   34 | #include <dart/gui/osg/osg.hpp>                                                                                                                                          
      |          ^~~~~~~~~~~~~~~~~~~~~~                                                                                                                                          
compilation terminated

The file is not generated from the osg.hpp.in and I'm not sure why.

Full build log: build.log

Steps to Reproduce

1. unpack source tarball
2. compile as described in docs

[heeplr]

I found that this doesn't happen when OpenSceneGraph is installed.

Leaving this open since it's probably some cmake issue not properly respecting the unfound optional osg package.