Hello,

I think adding the following to the end of the MLPREFIX glossary entry would demystify it a lot:

  Note {
    The "ML" in MLPREFIX stands for "MultiLib". This is historical and comes from
    a time when 'nativesdk' was a suffix rather than a prefix on the recipe name.
    When 'nativesdk' was turned into a prefix, it made sense to set MLPREFIX for
    it as well.
  }
  
  An example situation where MLPREFIX might be needed is when using
  [BBCLASSEXTEND] to provide a nativesdk version of a recipe in addition to the
  target version. If that recipe declares build-time dependencies on tasks in
  other recipes by using [DEPENDS], then a dependency on "foo" will
  automatically get rewritten to a dependency on "nativesdk-foo". However,
  dependencies like the following will not get rewritten automatically:
  
    do_foo[depends] += "some-recipe:do_foo"
  
  If you want such a dependency to also get transformed, you can do the
  following:
  
    do_foo[depends] += "${MLPREFIX}some-recipe:do_foo"


Cheers,
Ulf