Incorporated changes for Ubuntu Mate on a Raspberry Pi

Makefile

@@ -1,5 +1,5 @@
 
-CPPFLAGS=-O
+CPPFLAGS=-O3
 
 all:	emu816
 

program.cc

@@ -25,6 +25,8 @@
 
 using namespace std;
 
+#include <string.h>
+
 #include "mem816.h"
 #include "emu816.h"
 
@@ -150,4 +152,4 @@ int main(int argc, char **argv)
 	for (;;) loop();
 
 	return(0);
-}
+}