Building an OpenXR Client for Cloud XR 4.0

I am also dropping this question here in case someone already got a bit further with setting up a OpenXR Client for CloudXR (instead of OpenVR)

In Order to use later features of the Meta Quest 3 of the OpenXR Api we are trying to move the sample from OpenVR to OpenXR but always end up with a crash. We have noticed the same behavior for CloudXR 3.2 as well as 4.0:

“I am currently trying to build a CloudXR client based on OpenXR by integrating the CloudXR functionality into the hello_xr sample from the OpenXR SDK.

I am currently having an issue with the following error:
2024-09-19 13:01:04.669 11502-11588 libc com.nvidia.cloudxr.ovr A Fatal signal 11 (SIGSEGV), code 2 (SEGV_ACCERR), fault addr 0x7bbcbfe6b8 in tid 11588 (Thread-3), pid 11502 (dia.cloudxr.ovr)

This occurs when calling cxrReleaseFrame (after I have previously called cxrLatchFrame). If I call cxrReleaseFrame without previously calling cxrLatchFrame, the error does not occur.
The same error also occurs when calling cxrDestroyReceiver (after I have previously called cxrLatchFrame). If I call cxrDestroyReceiver without previously calling cxrLatchFrame, the error does not occur.

The error disappears if I remove the following line from the CMakeLists.txt:
target_link_libraries(hello_xr PRIVATE openxr-gfxwrapper)
Unfortunately, I need the openxr-gfxwrapper to render with OpenXR.

My question is: How can the mere addition of the openxr-gfxwrapper lead to a segmentation fault in the CloudXR functions cxrReleaseFrame and cxrDestroyReceiver?”

Anybody out there that had more success in moving to OpenXR on the client side?

It’s too bad there isn’t an open source CloudXR / OpenXR client available on Github to help Nvidia’s customers.

Sent you a DM.