I could not find anything like "Compiler putput to be ignored"
. :-(
Well, you should
always start with telling what version and platform your are using, otherwise it's hard to help.
So I guess you are on Windows and running a recent nightly. In that case, the option is under:
Settings -> Compiler -> [select your compiler] -> Other settings -> Below "Build method" you'll find the "Compiler output to be ignored". Just enter a keyword / phrase in the text box and hit "add".
BTW: Next time please also don't hijack a 2 year old thread. It's better to create a new one, referring to this. The reason is, that otherwise
all people listening to this thread (who's answer is already been given) get an email notification after years.