[Discuss-gnuradio] Shared varible between blocks

[Vincenzo]

Hi everybody,

I'm looking for suggestions on how to implement a variable that is
shared between two blocks. 
If I include the same header into the .cc files implementing my blocks
I get the "multiple definition of variable x" error.

Which is the correct way to do this?
is there an example available?

many thanks in advance 
vincenzo