QNX ide adds library files

Refer to the help documentation,
First, check whether there are few header files.
The second is that the library used has not been added. For example, the library libsock. So needs to be added to the socket.

Add a method. If you use IDE, go to project> Properties> qnx c/C ++ project> linker.
Category = extra Libraries
Add sock. Not before or after. (Use QNX target to select the library file //// c: \ qnx650 \ target \ qnx6 \ x86 \ Lib \ libusbdi. SOS)
For example, Math Library and M can be used.