How to add custom config lines to a Kconfig fragment?

Nick_RA 4 hours ago

Using NCS 3.0.2 I have multiple build variants of my project, based on the same custom PCB but with different parts fitted, and different functionality. So I have create different build configs with custom dts files - this works OK.

I would like to add some of my own custom config entries, so I'm trying to use a Kconfig fragment, but whatever I try I get a "ignoring malformed text" error

Here's an example:

config FOO
  bool "foobar"
  default n

Cwarning: ignoring malformed line 'config FOO_BAR'
Cwarning: ignoring malformed line '  bool "foobar"'
Cwarning: ignoring malformed line '  default n'

Where am I going wrong...?