Make [1]: *** [rtppacket. Lo] Error 1: rtppacket. cpp: 51: Error: 'memcpy' was not declared in this scope

Recently I want to do something about real-time transmission, so I want to get a jrtplib and lthread.
I discovered this was hard to find and install.
Resources are available on csdn (only resource points are used). However, I do not recommend that you use these resources. After all, not all users have csdn accounts. Even if you have an account, you may not have resource points, I will give you an address. The above resources are free of charge, and they are very good (in this case, it is much better than csdn <VPC, let alone >_<>)
Http://research.edm.uhasselt.be /~ Jori/page/index. php? N = cs. jthread
This is the website of jrtplib author. Although it is an English website, it is easy to go down to jrtplib and lthread, and there is a menu on the left that can be found without being blind.
I had to find the resources. I thought it would be nice to install the resources. It was very depressing to install the resources. Make told me the following error:
... Jrtplib/. Configure
This step is okay.
... Jrtplib/make
This step causes problems.
Make [1]: *** [rtppacket. Lo] Error 1: rtppacket. cpp: 51: Error: 'memcpy' was not declared in this scope
I don't know if many people will be unable to install jrtplib due to this situation, but the resources on csdn and the website I just mentioned will all have the same error. In fact, the solution is very easy. Just add the header file string. h to rtppack. cpp, that is, # include <string. h>.
In addition, rtcpcompoundpacketbuilder. cpp can also be handled in the same way. After modification, lrtplib is successfully installed in make install. As for lthread, it is not so troublesome and can be installed smoothly.