rom flashing – /system/etc/ld.config.version_identifier.txt not found and how to check for VNDK compliancy

I need to flash using a Generic System Image (GSI) but when I’m checking if my device is Vendor Native Development Kit (VNDK) complaint as per the documentation here https://developer.android.com/topic/generic-system-image#device-compliance it says

Check for cross-version support by running the following command:

adb shell cat /system/etc/ld.config.version_identifier.txt
| grep -A 20 “(vendor)”

This file doesn’t exist on my Google Pixel (1 aka Sailfish) or my Google Pixel 2 XL (taimen).