A while ago, I had to disable a couple of warnings from legacy code so I could first perform the Unicode conversion, then make time to eliminate the actual warning cause.
This post was much helpful here:
Marc’s Blog: Delphi XE2’s hidden hints and warnings options.
He lists all the W#### and X#### warnings he could find in Delphi XE2 (XE3, XE4 and XE5 more or less have the same), including the mapping to the equivalent directive IDs used inside these blocks:
{$WARN SYMBOL_DEPRECATED ON}
{$WARN SYMBOL_DEPRECATED OFF}
{$WARN SYMBOL_DEPRECATED DEFAULT}
{$WARN SYMBOL_DEPRECATED ERROR}
I also learned that the DEFAULT value restores an option to what you specified in the project settings.
–jeroen
The Wiert Corner - irregular stream of stuff 