Newbie to gfortran needs a little help

[Mark Hounschell <markh@xxxxxxxxxx>]

I hope this is the correct list to ask. I'm porting a bunch of old 
fortran code and am getting thousands of these warnings I don't 
understand. Most all are doing some sort of add or subtract on integer*2 
variables. This is just an example.

      program test
      implicit none

      integer*2 val/10/

      val = val - 1

      write(6,10)val
 10  format('val = ',I2)
      stop
      end


compiled with:

f77 -std=legacy -Wall test.f 

test.f:6.12:

      val = val - 1
               1
Warning: Possible change of value in conversion from INTEGER(4) to 
INTEGER(2) at (1)

Thanks
Mark