'make help' br0ken for @echo ' valid values for SPHINXDIRS are: $(_SPHINXDIRS)'

[Randy Dunlap <rdunlap@xxxxxxxxxxxxx>]

It seems that _SPHINXDIRS is empty.  I'm getting (short extract):

  make SPHINXDIRS="s1 s2" [target] Generate only docs of folder s1, s2
  valid values for SPHINXDIRS are: 

  make SPHINX_CONF={conf-file} [target] use *additional* sphinx-build
  configuration. This is e.g. useful to build with nit-picking config.

  Default location for the generated documents is Documentation/output


-- 
~Randy