Documentation request how to specify include firs for intelisense and defines

Feature Request

We build with makefile cross compiling

An in my makefile I can add a target to create a file that lists sec firs and include firs and active # defines for intellisense

what does not work is having viscose just select all h files under the project root for

reason: I have different( multiple) chip drivers in different sub directories the makefile has a macro/variable that controls the active target and configuration

Example top dir is BSP and under that dir are 5 different boards something like this
BSP/boardname/include/board gpio.h
and BSP/src/board gpio.c

thus a makefile target can create a file for intelisense

part 2 is how do I tell vs-code to forget and delete the intellisense database because it is lost or the configuration has changed and it needs to be rebuilt

what files do I delete to make that happen

Start with the Makefile target that emits include directories and active #defines, then compare it with the VS Code IntelliSense configuration and database behavior. Update documentation to cover both selecting the generated configuration for the BSP/board layout and the supported way to force a rebuild; done when both questions have explicit steps.