tree c6eefdc0164064eb2fcb01a3ffb8e9b8a2c7d709
parent a2db6cde51d0fd4f7a65c1ab19013196fbda209f
author Joey Armstrong <joey@opennetworking.org> 1702141122 -0500
committer Joey Armstrong <joey@opennetworking.org> 1705329302 -0500

Refactor library makefile path detection logic.

makefiles/include.mk
--------------------
  o Refactor library makefile loader logic into reusable functions.
    - Common logic to infer paths - repo:onf-make/makefiles/, local makefiles/, etc.
  o Simplify logic:
    - remove inlined include(-once) guard macros, replaced by a function.
    - reduce global makefile path variables to a count of two.

makefiles/library-makefiles.mk
------------------------------
  o Define functions able to infer library makefile paths.
  o Added function include-once
    - Guard macros are used to include a makefile at most once.
  o Added function gen-mk-paths
  o Added function gen-mk-paths--var-top
  o Added function gen-mk-paths--var-dir
    - Infer path to (a) library makefile(s) directory, assign to var.
    - Infer path to sandbox root, assign to var.
  o Added function gen-mk-include
    - Infer library make paths and include $(lib-mk)/makefiles/include.mk

Change-Id: I2cc4dbf11c4e9d61aee4033d0196f2c9aac0420f