Error: ' memcpy ' is not declared into this scope

Recently to do some real-time transmission aspects of things, did not find this thing is not easy to see, also not fit That thought can smooth good outfit, pretend to be very depressed, make always reported me wrong: Make This step is a problem. Sdh_pocket_reader.cpp:208:error: ' memcpy ' is not declared into this scope I don't know if there's a lot of people who are going to do this, but I'm going to make the same mistake. In fact, the solution is very easy to add a header file in the program string.h is good, is #include<string.h> , the same method can be dealt with. After the change, make in make install on the smooth loaded L.