Update Makefile

Author: adam-maj

Makefile

@@ -4,18 +4,21 @@ export LIBPYTHON_LOC=$(shell cocotb-config --libpython)
 
 test_%:
 	make compile
-	iverilog -o build/sim.vvp -s gpu -g2005 build/gpu.v
+	iverilog -o build/sim.vvp -s gpu -g2012 build/gpu.v
 	MODULE=test.test_$* vvp -M $$(cocotb-config --prefix)/cocotb/libs -m libcocotbvpi_icarus build/sim.vvp
 
 compile:
 	make compile_alu
 	sv2v -I src/* -w build/gpu.v
 	cat build/alu.v >> build/gpu.v
-	sed -i '' '1s/^/`timescale 1ns\/1ns\n/' build/gpu.v
+	echo '`timescale 1ns/1ns' > build/temp.v
+	cat build/gpu.v >> build/temp.v
+	mv build/temp.v build/gpu.v
 
 compile_%:
 	sv2v -w build/$*.v src/$*.sv
 
 # TODO: Get gtkwave visualizaiton
+
 show_%: %.vcd %.gtkw
 	gtkwave $^