-# Default targets for subdirectory calls
-# Parameters:
-# 1: dependencies for the prepare step
-define default_subtargets
- %-download: FORCE
- $$(MAKE) -C $$(patsubst %-download,%,$$@) download
-
- %-prepare: $(1) FORCE
- $$(MAKE) -C $$(patsubst %-prepare,%,$$@) prepare
-
- %-compile: %-prepare
- $$(MAKE) -C $$(patsubst %-compile,%,$$@) compile
-
- %-install: %-compile
- $$(MAKE) -C $$(patsubst %-install,%,$$@) install
-
- %-clean: FORCE
- @$$(MAKE) -C $$(patsubst %-clean,%,$$@) clean
+define confvar
+$(1):=$$(strip $$($(1)))_
+$(foreach v,$(2),
+ $(1):=$$(strip $$($(1)))$(if $($(v)),y,n)
+)