[Omp] Clarification of the Fortran OpenMP 2.0 specs about FLUSH directive is needed

[Marina Kraeva]

Hello,

I have several questions about thread-visible variables and FLUSH 
directive. In the Fortran OpenMP API 2.0 specs it's said that "Local 
variables that have had their address taken and saved or have had their 
address passed to another subprogram" are thread-visible.

The first question is how one can take and save the address of a variable.

The second question is whether I understand it right that the 
thread-visible variables are shared variables and "global-lifetime 
memory locations". I did not find any mention of thread-visible 
variables in the OpenMP API 2.5 specs other than in the following 
sentence: "A flush construct without a list, executed on a given thread, 
operates as if the whole thread-visible data state of the program, as 
defined by the base language, is flushed."

The last question is about passing address of a local variable to 
another subprogram (see the quote from the specs 2.0 above). Does it 
mean that in case a local variable was passed into another subprogram 
(and in Fortran all variables are passed by address), this variable is 
considered thread-visible? Can anyone provide an example for that quote?

Or should I disregard everything in the specs 2.0 as there is new specs?

Thank you in advance,
Marina Kraeva.