Added optional address sanitizer flags

CMakeLists.txt

@@ -25,6 +25,10 @@ else()
   add_compile_options(-W -Wall -Wno-deprecated-declarations)
 endif()
 
+# optional address sanitizer, outcomment to turn on
+#add_compile_options(-fsanitize=address)
+#add_link_options(-fsanitize=address)
+
 # find git
 find_package(Git)