I have followed the instructions given at https://www.raspberrypi.org/documentation/linux/kernel/building.md to build a custom kernel. (I have cross-compiled it on an x86 box.) The custom kernel is running perfectly under Raspbian on a RPI 3B+.
The cross-compilation process has not generated a linux-headers-VERSION.deb package.
How do I install the Kernel Headers for this custom kernel? (I need them to compile a kernel loadable module.)