[Buildroot] [PATCH v3 1/6] Makefile: introduce BR2_PATH

[Jeremy Rosen]

> 
> I am wondering about the name BR2_PATH. Normally, BR2_<something> is
> used for variables coming from Kconfig options. Introducing the
> BR2_PATH variable, which doesn't come from a Kconfig option seems to
> violate this unwritten rule.
> 

as a side note, BR2_EXTERNAL also violates that rule...

BR2_EXTERNAL is still an unreleased feature so if this rule becomes
official there is still time to rename...