diff --git a/makefiles/bootstrap.mk b/makefiles/bootstrap.mk
new file mode 100644
index 0000000..eec469b
--- /dev/null
+++ b/makefiles/bootstrap.mk
@@ -0,0 +1,80 @@
+# -*- makefile -*-
+# -----------------------------------------------------------------------
+# Intent: Dependency-free macros used to source library makefiles
+#         and define the build environment.
+# -----------------------------------------------------------------------
+
+$(if $(DEBUG-bootstrap_mk),$(warning ENTER))
+
+##---------------------##
+##---]  CONSTANTS  [---##
+##---------------------##
+is-false = $(if $(1),true,$(null))
+is-true  = $(if $(1),$(null),true)
+
+##--------------------------##
+##---]  LIBRARY MACROS  [---##
+##--------------------------##
+is-null = $(if $(1),$(null),$(error $(1)= is undef))
+# is-null-var = $(if $($(1)),$(null),$(error $(1)= is undef))
+
+## [origin]
+## foreach: var=automatic, origin=undef
+is-null-var-orig = $(strip \
+  $(foreach varname,$(1),\
+      $(warning ** is-null-var: varname=$(varname), origin=$(origin 1), origin=$(origin var))\
+  )\
+)
+#  $(if $(1),$(call is-null-var-indirect,$($(1))),$(error $(1)= is undef)))\
+
+is-null-var-indirect = $(if $(1),$(null),$(error $(1)= is undef))
+
+# origin - undefned
+# default
+# environment
+# environment override
+# automatic
+# null(blah) ?   - true
+
+## -----------------------------------------------------------------------
+## Intent: Given an indirect var containing varname of a makefile *_ROOT
+##         parent director, derive a *_MKDIR variable and conditionally
+##         include the makefile hierarchy.
+## -----------------------------------------------------------------------
+## Given:
+##   o var containing OPT_ROOT=path
+## Return:
+##   o OPT_MKDIR=$(OPT_ROOT)/makefiles
+##   o If exists include $(OPT_MKDIR)/include.mk
+## -----------------------------------------------------------------------
+# library-include   := $(call mk-library-include,blah)
+
+mk-library-include=$(strip \
+  $(warning mk-library-include: $$1[$(1)] = [$($(1))]))\
+  $(call is-null-var,1)\
+  $(foreach var,$($(1)),\
+    $(info var=$(var) is-null=$(call is-null-var,var))\
+  $(foreach val,$$(var),\
+    $(info val=$(val))\
+    $(foreach makedir,$(subst _ROOT,_MKDIR,$(var)),\
+$(warning makedir=$(makedir))\
+)\
+)\
+)\
+)
+
+
+# $(warning makedir=$(makedir))\
+      $(if $($(makedir)),$(null),\
+        $(eval $(makedir)=$$$$($(var))/makefiles)\
+$(warning $(makedir) = $($($(makedir))))\
+$(info $$(wildcard $(val)/makefiles/include.mk) = $(wildcard $(val)/makefiles/include.mk))\
+        $(foreach mf,$(wildcard $(wildcard $(val)/makefiles/include.mk)),\
+$(warning $$(eval include $(mf)))\
+          $(eval include $(mf)))\
+))))\
+)
+
+$(if $(DEBUG-bootstrap_mk),$(warning LEAVE))
+
+# [EOF]