(j3.2006) How to find out if a compiler supports ASYNCHRONOUS attribute outside of I/O

[Rasmussen, Craig E]

For MPI we want to add a flag to see if the ASYNCHRONOUS attribute can be used to turn off aggressive optimizations for code outside of I/O.  Unfortunately I can't think of a runtime test that can be applied across all compiler that can provide this information.  Hopefully this information might be in documentation but it is very hard to distribute software that is based on documentation alone.  It is much easier to right a runtime test if possible.

Any ideas as to how to find out if aggressive optimization is turned off with the ASYNCHRONOUS attribute?

Thanks,
Craig