makefile: allow DESIGN_CONFIG to introduce a different default than Makefile

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

flow/Makefile

@@ -2,6 +2,11 @@
 # file to avoid having to adding the to the make command line.
 -include settings.mk
 
+# Include design and platform configuration before setting default options
+# in this file. This allows the DESIGN_CONFIG to set different defaults than
+# this file.
+include $(DESIGN_CONFIG)
+
 # ==============================================================================
 # Uncomment or add the design to run
 # ==============================================================================
@@ -191,10 +196,6 @@ export UTILS_DIR     ?= $(FLOW_HOME)/util
 export SCRIPTS_DIR   ?= $(FLOW_HOME)/scripts
 export TEST_DIR      ?= $(FLOW_HOME)/test
 
-#-------------------------------------------------------------------------------
-# Include design and platform configuration
-include $(DESIGN_CONFIG)
-
 PUBLIC=nangate45 sky130hd sky130hs asap7 ihp-sg13g2 gf180
 
 ifneq ($(wildcard $(PLATFORM_HOME)/$(PLATFORM)),)