tree 15b1791b3ad593e0d41a1549a6ae710bcbbee793
parent a8205c202e320b5f74e5b93de7c0ac2809dfc3c0
author Joey Armstrong <joey@opennetworking.org> 1696019479 -0400
committer Joey Armstrong <joey@opennetworking.org> 1699635463 -0500

Bulk filter undef vars to support makefile target lint-make

makefiles/include.mk
makefiles/lint/make/include.mk
makefiles/lint/make/makefile.mk
-------------------------------
  o Move lint-make target logic into makefiles/lint/make/

makefiles/lint/make/warn-undef-vars.mk
--------------------------------------
  o Volume undef warnings plague makefile linting.
  o Makefile logic cleanup needed but in the interim valid-but-undef
    vars are defined as "var := $(null)".  This helps shorten the
    error log so lint-make can be used as a default lint target.

Change-Id: I48a0c6b2c71cf1dd5a6554cc5823502ed88482d0