makefile: introduce UNSET_AND_MAKE to invoke make recursively

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

Author: oharboe

flow/Makefile

@@ -454,6 +454,8 @@ else ifneq ($(FOOTPRINT_TCL),)
 IS_CHIP = 1
 endif
 
+UNSET_AND_MAKE = @bash -c 'for var in $(ISSUE_VARIABLES_NAMES); do unset $$var; done; echo $(MAKE) DESIGN_CONFIG=$(DESIGN_CONFIG) $$@; $(MAKE) DESIGN_CONFIG=$(DESIGN_CONFIG) $$@' --
+
 # STEP 1: Translate verilog to odb
 #-------------------------------------------------------------------------------
 $(RESULTS_DIR)/2_1_floorplan.odb: $(RESULTS_DIR)/1_synth.v $(RESULTS_DIR)/1_synth.sdc $(TECH_LEF) $(SC_LEF) $(ADDITIONAL_LEFS) $(FOOTPRINT) $(SIG_MAP_FILE) $(FOOTPRINT_TCL)