should docs warn about setting DISTRO to ""?

  just being pedantic again ... doc for DISTRO:

https://docs.yoctoproject.org/ref-manual/variables.html#term-DISTRO

notes:

"If the DISTRO variable is blank, a set of default configurations are
used, which are specified within meta/conf/distro/defaultsetup.conf
also in OpenEmbedded-Core (OE-Core)."

suggesting that this is acceptable. but from bitbake.conf:

# An empty distro leads to :: entries in OVERRIDES and FILEOVERRIDES which
# is a bad idea. Setting a dummy value is better than a ton of anonymous python.
DISTRO ??= "nodistro"

should the ref manual entry also suggest that setting this to "" is
also a bad idea?

rday