Removed some code that wasn't meant for synthesis and fixed important bug in Makefile

system/Makefile

@@ -64,7 +64,7 @@ else
 $(error invalid ECP5 device ${ECP5_DEVICE})
 endif
 
-ECP5_TARGETS=synth_ecp5.json synth_ecp5_out.config synth_ecp5.bit synth_ecp5.dfu fpga_config/${FPGA_BOARD}/fpga_top.v
+ECP5_TARGETS=synth_ecp5.json synth_ecp5_out.config synth_ecp5.bit synth_ecp5.dfu
 ECP5_TARGETS+=abc.history # created from yosys
 
 synth_ecp5.json: ${SOURCES} ${TOP_LEVEL_SOURCE} fpga_config/${FPGA_BOARD}/fpga_top.v ${INCLUDES} boot_code.txt

system/config.v

@@ -47,6 +47,13 @@
 
 
 /********** Internal **********/
+`ifdef SYNTHESIS
+	`undef DEBUG_REG_WRITES
+	`undef DEBUG_PC_ADDRESS
+	`undef DEBUG_DATA_READ_WRITES
+	`undef CALCULATE_IPC
+	`undef OTUPUT_JSON_STATISTICS
+`endif
 
 `ifdef OTUPUT_JSON_STATISTICS
 	`define CALCULATE_IPC

system/system.v

@@ -102,10 +102,12 @@ always @(negedge clock)begin
 end
 `endif
 
+`ifndef SYNTHESIS
 always @(negedge wr) begin
 	if(IOMEM==1'b1 && address_bus[7:0]==8'hA5 )
 		$write("%s" ,data_bus_write[15:8]);
 end
+`endif
 
 
 `ifdef CALCULATE_IPC
@@ -132,7 +134,16 @@ end
 `ifdef OTUPUT_JSON_STATISTICS
 reg [128:0] instruction_count_temp;
 `endif
-always @(posedge clock) begin
+
+`ifndef SYNTHESIS
+	reg sane;
+	reg [128:0] cycles;
+
+	always @(posedge reset)begin
+		sane<=1;
+	end
+
+	always @(posedge clock) begin
 		/* Allow some clock cycles for the waveform*/
 		case(finish)
 			2'd0: begin end
@@ -157,18 +168,12 @@ always @(posedge clock) begin
 				`endif
 			end
 			2'd3: begin
-		`ifndef SYNTHESIS
 				$finish;
-		`endif
 			end
 		endcase
-end
+	end
 
-always @(posedge reset)begin
+	always @( ERROR ) begin
-	sane<=1;
-end
-reg sane;
-always @( ERROR ) begin
 		if ( ERROR != `ERR_NO_ERROR && sane == 1 ) begin
 				$display("PROCESSOR RUN INTO AN ERROR.");
 				case (ERROR)
@@ -182,16 +187,15 @@ always @( ERROR ) begin
 					end
 				endcase
 				$display("Cycles run for: %0d",cycles-1);
-		`ifndef SYNTHESIS
 				if($value$plusargs("MEMDUMP=%s",memdump_name))begin
 					$writememh(memdump_name, system.sysmem.memory,0,32767);
 				end
-		`endif
 				finish<=2'd1;
 		end
-end
+	end
+`endif
+
 
-reg [128:0] cycles;
 
 always @(negedge clock)begin
 	if(reset==1)