finit-local-zero and default initialization

[Steve Kargl]

On Tue, Jun 05, 2007 at 04:50:43PM -0700, Asher Langton wrote:
> I'm planning to add support for -finit-local-zero (PR20441), as well
> as for arbitrary default initializations specified at compile-time.
> One request from within LLNL has been for a way to control the default
> initialization values at runtime, via some simple library routines
> (set_default_integer, get_default_integer, etc.).  This would be very
> useful for debugging large codes without recompiling an entire
> project.  Any comments, suggestions, or objections?
> 

I think the compile time options would be quite useful.
Can you describe the runtime method?  Would 

   program test
   integer i
   print *, i
   end progrma test

compile to (pseudocode of course)

  if (getenv(RUNTIME_INITIALIZE))
    i = set_default_integer()
  
  print i
  end


-- 
Steve