Merge pull request #2375 from Pinata-Consulting/yosys-improved-error-messages

synthesis: improve error messages

Author: maliberty

flow/Makefile

@@ -540,7 +540,8 @@ do-yosys:
 .PHONY: do-yosys-canonicalize
 do-yosys-canonicalize: yosys-dependencies
 	mkdir -p $(RESULTS_DIR) $(LOG_DIR) $(REPORTS_DIR) $(OBJECTS_DIR)
-	($(TIME_CMD) $(YOSYS_EXE) $(YOSYS_FLAGS) -c $(SCRIPTS_DIR)/synth_canonicalize.tcl) 2>&1 | tee $(abspath $(LOG_DIR)/1_1_yosys_canonicalize.log)
+	# NOTE! YOSYS_FLAGS is omitted here because "-v 3" silences helpful error messages
+	($(TIME_CMD) $(YOSYS_EXE) -c $(SCRIPTS_DIR)/synth_canonicalize.tcl) 2>&1 | tee $(abspath $(LOG_DIR)/1_1_yosys_canonicalize.log)
 
 $(RESULTS_DIR)/1_synth.rtlil: $(YOSYS_DEPENDENCIES)
 	$(UNSET_AND_MAKE) do-yosys-canonicalize