Errors when running osgearth_annotation example project

[yunusyurtturk]

Hi.
I'm trying to dive into osgEarth but facing some issues. One of them is I can't run the examples without making some modifications.
My version is osgearth-3.5 (already tried with osgearth-3.6 but facing similar issues, so trying osgearth-3.5 this time)

This is my osgearth_version --caps output:

Fontconfig error: Cannot load default config file: No such file: (null)
[osgearth info] [Capabilities] osgEarth Version: 3.5.0 build 149
[osgearth info] [Capabilities] OSG Version: 3.6.5
[osgearth info] [Capabilities] GDAL Version: 3.9.1
[osgearth info] [Capabilities] GPU Vendor: NVIDIA Corporation
[osgearth info] [Capabilities] GPU Renderer: NVIDIA GeForce RTX 3060 Laptop GPU/PCIe/SSE2
[osgearth info] [Capabilities] GL/Driver Version: 3.3.0 NVIDIA 546.33 (330)
[osgearth info] [Capabilities] GL Core Profile: yes

I built the osgEarth project successfully.
Now I want to run 'Example osgearth_annotation' project.

When I set it as 'Startup Project' and click Run on Visual Studio, I get 'osgEarth.dll not found' error. I expect it to work as is, without modifying or copying DLLs to places, which makes me think I missed something. (1)

To solve the problem, I found the osgEarth.dll and placed it inside the osgearth\build\bin\RelWithDebInfo directory. After that it stopped complaining about the .dll

However, this time I get an error saying
[osgearth warning] [MapNodeHelper] No valid earth file loaded - aborting
[osgearth warning] Usage: E:\Projeler\GIS\osgearth\osgearth\build\bin\RelWithDebInfo\osgearth_annotation.exe

To solve this issue, I set a command line argument to the osgearth_annotation project and I set full path of "E:\Projeler\GIS\osgearth\osgearth\tests\annotation.earth" file. Again, I think I might have solved this problem in tricky way so I expect your guide/suggestions. Since the annotation.earth file is related to osgearth_annotation project (2)

With the command line argument set, I run the project. This time I get this error:

[osgearth warning] [MapNodeHelper] No valid earth file loaded - aborting
[osgearth warning] Usage: E:\Projeler\GIS\osgearth\osgearth\build\bin\RelWithDebInfo\osgearth_annotation.exe

After making some more research, I found OSG_NOTIFY_LEVEL=DEBUG option, and give it a try. In somewhere of the output, it says failed loading "osgPlugins-3.6.5/osgdb_earth.dll":

FindFileInPath() : trying D:\vcpkg\vcpkg\packages\osg_x64-windows\lib\osgPlugins-3.6.5\osgdb_earth.dll ...
DynamicLibrary::failed loading "osgPlugins-3.6.5/osgdb_earth.dll"
Error reading file E:\Projeler\GIS\osgearth\osgearth\tests\annotation.earth: file not handled
[osgearth warning] [MapNodeHelper] No valid earth file loaded - aborting
[osgearth warning] Usage: E:\Projeler\GIS\osgearth\osgearth\build\bin\RelWithDebInfo\osgearth_annotation.exe
Viewer::~Viewer():: start destructor getThreads = 0
DatabasePager::RequestQueue::~RequestQueue() Destructing queue.

build\vcpkg_installed\x64-windows\plugins directory is already in my PATH btw.
osgdb_earth.dll is under \build\lib\RelWithDebInfo\osgdb_earth.dll directory by default, so I copy&pasted this file to \build\bin\RelWithDebInfo directory and it stopped complaining. This solved the problem but temporarly, it will be a problem next time I configure my cmake or try to build from strach.

I don't know why it gives error and need some help here, to mitigate the .dll copying by manually (3)