Switched to g++

runtime/io/vx_io.h

@@ -5,6 +5,17 @@
 
 static char * hextoa[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
 void vx_print_hex(unsigned);
-void vx_print_str(char *);
 void vx_printf(char *, unsigned);
-void vx_printc(unsigned, char c);
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+void vx_print_str(char *);
+void vx_printc(unsigned, char c);
+
+
+#ifdef __cplusplus
+}
+#endif