Suppressing warnings in specific file

[Brad Settlemyer]

Hello,

  How do I suppress warnings for a single implementation file using gcc 
3.0.3?  There were several similar queries that you addressed by changing 
code to suppress the warning, I don't have that luxury because the headers 
are 3rd party and I can't change them reliably.  The specific warning is 
about classes with virtual functions but without virtual destructors.  I 
agree that usually this is bad behaviour, and I want to be warned if I do it 
in my own code, but I would like to suppress it in the 3rd party header, any 
suggestions?

Thanks
Brad