gdb: delete a couple of declarations from f-lang.h

One declaration in f-lang.h is for a function that doesn't even exist,
another is for a function that is only used within f-lang.c.

One declaration is deleted, the other function I make static in
f-lang.c.

gdb/ChangeLog:

	* f-lang.c (fortran_argument_convert): Add declaration.  Add
	header comment, taken from f-lang.h.  Make static.
	* f-lang.h (f77_get_dynamic_array_length): Delete declaration.
	(fortran_argument_convert): Delete declaration.

gdb/ChangeLog

@@ -1,3 +1,10 @@
+2020-11-13  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* f-lang.c (fortran_argument_convert): Add declaration.  Add
+	header comment, taken from f-lang.h.  Make static.
+	* f-lang.h (f77_get_dynamic_array_length): Delete declaration.
+	(fortran_argument_convert): Delete declaration.
+
 2020-11-12  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* ada-exp.y (find_primitive_type): Make parameter const.

gdb/f-lang.c

@@ -41,6 +41,9 @@
 
 /* Local functions */
 
+static struct value *fortran_argument_convert (struct value *value,
+					       bool is_artificial);
+
 /* Return the encoding that should be used for the character type
    TYPE.  */
 
@@ -844,9 +847,21 @@ _initialize_f_language ()
   f_type_data = gdbarch_data_register_post_init (build_fortran_types);
 }
 
-/* See f-lang.h.  */
+/* Ensures that function argument VALUE is in the appropriate form to
+   pass to a Fortran function.  Returns a possibly new value that should
+   be used instead of VALUE.
 
-struct value *
+   When IS_ARTIFICIAL is true this indicates an artificial argument,
+   e.g. hidden string lengths which the GNU Fortran argument passing
+   convention specifies as being passed by value.
+
+   When IS_ARTIFICIAL is false, the argument is passed by pointer.  If the
+   value is already in target memory then return a value that is a pointer
+   to VALUE.  If VALUE is not in memory (e.g. an integer literal), allocate
+   space in the target, copy VALUE in, and return a pointer to the in
+   memory copy.  */
+
+static struct value *
 fortran_argument_convert (struct value *value, bool is_artificial)
 {
   if (!is_artificial)

gdb/f-lang.h

@@ -312,8 +312,6 @@ extern LONGEST f77_get_upperbound (struct type *);
 
 extern LONGEST f77_get_lowerbound (struct type *);
 
-extern void f77_get_dynamic_array_length (struct type *);
-
 extern int calc_f77_array_dims (struct type *);
 
 
@@ -341,23 +339,6 @@ struct builtin_f_type
 /* Return the Fortran type table for the specified architecture.  */
 extern const struct builtin_f_type *builtin_f_type (struct gdbarch *gdbarch);
 
-/* Ensures that function argument VALUE is in the appropriate form to
-   pass to a Fortran function.  Returns a possibly new value that should
-   be used instead of VALUE.
-
-   When IS_ARTIFICIAL is true this indicates an artificial argument,
-   e.g. hidden string lengths which the GNU Fortran argument passing
-   convention specifies as being passed by value.
-
-   When IS_ARTIFICIAL is false, the argument is passed by pointer.  If the
-   value is already in target memory then return a value that is a pointer
-   to VALUE.  If VALUE is not in memory (e.g. an integer literal), allocate
-   space in the target, copy VALUE in, and return a pointer to the in
-   memory copy.  */
-
-extern struct value *fortran_argument_convert (struct value *value,
-					       bool is_artificial);
-
 /* Ensures that function argument TYPE is appropriate to inform the debugger
    that ARG should be passed as a pointer.  Returns the potentially updated
    argument type.