tree 9a97c3f18fe9ef9d7d2e441a7df04bc465a9a533
parent 3af4eb50c0b29474eaa05d62673abc796348bd5c
author Chris Kay <chris.kay@arm.com> 1717020991 +0000
committer Chris Kay <chris.kay@arm.com> 1718380487 +0000

build: add facilities for interpreting boolean values

This is another small addition to the build system utlities to make it
easier to determine the truthiness of an arbitrary value.

This change adds the `bool` function, which takes a value and determines
whether the value is "truthy". We consider a value to be truthy if it is
NOT one of: "0", "n", "no", "f" or "false" (all case-insensitive).

If the value is truthy then it is returned as-is. Otherwise, no value
is returned.

Change-Id: I19347f4c3ae00a6b448514a28cc2d9d06f683f25
Signed-off-by: Chris Kay <chris.kay@arm.com>