Control the storage allocation of variables in subprograms.

  The AUTOMATIC and STATIC attributes can be specified in a type
  declaration statement or an AUTOMATIC or STATIC statement, and take
  one of the following forms:

  Type Declaration Statement:

    type, [att-ls,] AUTOMATIC [,att-ls] ::   v [,v]...
    type, [att-ls,] STATIC    [,att-ls] ::   v [,v]...

  Statement:

     AUTOMATIC  v [,v]...
     STATIC     v [,v]...

     type      Is a data type specifier.

     att-ls    Is an optional list of attribute specifiers.

     v         Is the name of a variable or an array
               specification. It can be of any type.

  AUTOMATIC and STATIC declarations only affect how data is allocated
  in storage, as follows:

   o  A variable declared as AUTOMATIC and allocated in memory
      resides in the stack storage area.

   o  A variable declared as STATIC and allocated in memory resides
      in the static storage area.

  If you want to retain definitions of variables upon reentry to
  subprograms, you must use the SAVE attribute.

  Automatic variables can reduce memory use because only the
  variables currently being used are allocated to memory.

  Automatic variables allow possible recursion.  With recursion, a
  subprogram can call itself (directly or indirectly), and resulting
  values are available upon a subsequent call or return to the
  subprogram.  For recursion to occur, RECURSIVE must be specified in
  one of the following ways:

   o  As a keyword in a FUNCTION or SUBROUTINE statement

   o  As a compiler option

   o  As an option in an OPTIONS statement

  By default, the compiler allocates local variables of non-recursive
  subprograms, except for allocatable arrays, in the static storage
  area.  The compiler may choose to allocate a variable in temporary
  (stack or register) storage if it notices that the variable is
  always defined before use.  Appropriate use of the SAVE attribute
  can prevent compiler warnings if a variable is used before it is
  defined.

  To change the default for variables, specify them as AUTOMATIC or
  specify RECURSIVE (in one of the ways mentioned above).

  To override any compiler option that may affect variables,
  explicitly specify the variables as AUTOMATIC or STATIC.

                                 NOTE

          Variables that are data-initialized, and  variables
          in  COMMON  and  SAVE statements are always static.
          This is regardless of  whether  a  compiler  option
          specifies recursion.

  A variable cannot be specified as AUTOMATIC or STATIC more than
  once in the same scoping unit.

  If the variable is a pointer, AUTOMATIC or STATIC apply only to the
  pointer itself, not to any associated target.

  Some variables cannot be specified as AUTOMATIC or STATIC.  The
  following table shows these restrictions:

  Variable                    AUTOMATIC       STATIC
  --------                    ---------       ------
  Dummy argument                No              No
  Automatic object              No              No
  Common block item             No              Yes
  Use-associated item           No              No
  Function result               No              No
  Component of a derived type   No              No

  A variable can be specified with both the STATIC and SAVE
  attributes.

  If a variable is in a module's outer scope, it can be specified as
  STATIC, but not as AUTOMATIC.

  The AUTOMATIC attribute is compatible with the ALLOCATABLE,
  DIMENSION, POINTER, TARGET, and VOLATILE attributes.

  The STATIC attribute is compatible with the ALLOCATABLE, DIMENSION,
  POINTER, PRIVATE, PUBLIC, SAVE, TARGET, and VOLATILE attributes.