How do I get around the error: "VHDL use clause error at UAO_SOPC.VHD[ top level] design library altera_vhdl_support does not contain primary unit altera_vhdl_support_lib."?

Description

In order to compile your Nios project without this error, you will need to add the "altera_vhdl_support.vhd" file from the directory where Quartus II created your Nios system. To do this, go to the Project->Add files in the Project menu and browse over to the Nios directory. Then, double click on the "altera_vhdl_support.vhd" file to add it to your project. You should be able to compile error free after you perform this operation.