🚀 update makefile to choose different compilers by users & fix some codes for MSVC to compile.

module/makefile

@@ -1,29 +1,29 @@
 .PHONY=clean all mingw-all
 libfib.so: fib.cpp
-	clang++ -c -O3 fib.cpp -fPIC -o fib.o
-	clang++ -shared -o libfib.so fib.o
+	$(CXX) -c -O3 fib.cpp -fPIC -o fib.o
+	$(CXX) -shared -o libfib.so fib.o
 	rm fib.o
 libfib.dll: fib.cpp
-	g++ -c -O3 fib.cpp -fPIC -o fib.o
-	g++ -shared -o libfib.dll fib.o
+	$(CXX) -c -O3 fib.cpp -fPIC -o fib.o
+	$(CXX) -shared -o libfib.dll fib.o
 	del fib.o
 
 libkey.so: keyboard.cpp
-	clang++ -c -O3 keyboard.cpp -fPIC -o keyboard.o
-	clang++ -shared -o libkey.so keyboard.o
+	$(CXX) -c -O3 keyboard.cpp -fPIC -o keyboard.o
+	$(CXX) -shared -o libkey.so keyboard.o
 	rm keyboard.o
 libkey.dll: keyboard.cpp
-	g++ -c -O3 keyboard.cpp -fPIC -o keyboard.o -static
-	g++ -shared -o libkey.dll keyboard.o -static
+	$(CXX) -c -O3 keyboard.cpp -fPIC -o keyboard.o -static
+	$(CXX) -shared -o libkey.dll keyboard.o -static
 	del keyboard.o
 
 libnasock.so: nasocket.cpp
-	clang++ -c -O3 nasocket.cpp -fPIC -o nasocket.o
-	clang++ -shared -o libnasock.so nasocket.o
+	$(CXX) -c -O3 nasocket.cpp -fPIC -o nasocket.o
+	$(CXX) -shared -o libnasock.so nasocket.o
 	rm nasocket.o
 libnasock.dll: nasocket.cpp
-	g++ -c -O3 nasocket.cpp -fPIC -o nasocket.o -lwsock32 -static
-	g++ -shared -o libnasock.dll nasocket.o -lwsock32 -static
+	$(CXX) -c -O3 nasocket.cpp -fPIC -o nasocket.o -lwsock32 -static
+	$(CXX) -shared -o libnasock.dll nasocket.o -lwsock32 -static
 	del nasocket.o
 
 clean:
@@ -31,4 +31,4 @@ clean:
 all: libfib.so libkey.so libnasock.so
 	@ echo "build done"
 mingw-all: libfib.dll libkey.dll libnasock.dll
-	@ echo "build done"
+	@ echo build done