Zedboard Linux Socket Application Error
It's not the includes but the linker command line. If you have a dependency to libstdc++.so, then probably there is a -lstdc++ there.

First, you need to check if that library is really necessary, so remove that option from the link command. If you're still able to link the program, the problem is solved. If not, then you really need it and have to put it back.

In that case, you need to find out if there is some version of that .so in your system. In general, your program depends on the non-versioned name (libstdc++.so), and in your /lib or /usr/lib directory there are symbolic links that point to the actual version the system has (in your case apparently libstdc++.so.6). This may be another symbolic link to a more specific version (e.g. libstdc++.so.6.1) or the actual dynamic library. So you have to follow that trail and discover where it's broken, if the library does exist. 

And if it does not, you have to install it somehow (usually with the package manager of your OS)