Turn off useless Quartus warning messages

[Charles Eric LaForest]

See: http://quartushelp.altera.com/12.1/mergedProjects/hdl/vlog/vlog_file_dir_msg_onoff.htm

Basically, place a message_off directive at each module instance where synthesis reports warnings that don't help. Example: the lack of write ports on the inferred memory in the Address_Translator, and the width warnings for non-multiple-of-4-width memories.

[Charles Eric LaForest]

That link is gone. As is the method of using a "message_off" directive.
You now right-click on messages in the GUI and suppress them.
This creates a .srf file which lists the patterns to suppress.
The suppressed messages end up in a .smsg file for each P&R stage.