gas: isolate macro_strip_at to macro.c

This removes a leftover from i960 support; with that nothing is left
which would set macro_strip_at to non-zero, so the variable is converted
to a #define (retaining the logic in case a new user would appear) and
macro_init()'s respective parameter is dropped.

gas/as.c

@@ -1310,11 +1310,7 @@ gas_init (void)
   expr_begin ();
   eh_begin ();
 
-  int macro_strip_at = 0;
-#ifdef TC_I960
-  macro_strip_at = flag_mri;
-#endif
-  macro_init (flag_macro_alternate, flag_mri, macro_strip_at);
+  macro_init (flag_macro_alternate, flag_mri);
 
   dwarf2_init ();
 

gas/macro.c

@@ -60,7 +60,7 @@ static int macro_mri;
 
 /* Whether we should strip '@' characters.  */
 
-static int macro_strip_at;
+#define macro_strip_at false
 
 /* Number of macro expansions that have been done.  */
 
@@ -78,14 +78,13 @@ macro_del_f (void *ent)
 /* Initialize macro processing.  */
 
 void
-macro_init (int alternate, int mri, int strip_at)
+macro_init (int alternate, int mri)
 {
   macro_hash = htab_create_alloc (16, hash_string_tuple, eq_string_tuple,
 				  macro_del_f, notes_calloc, NULL);
   macro_defined = 0;
   macro_alternate = alternate;
   macro_mri = mri;
-  macro_strip_at = strip_at;
 }
 
 void

gas/macro.h

@@ -83,7 +83,7 @@ extern htab_t macro_hash;
 
 extern int buffer_and_nest (const char *, const char *, sb *,
 			    size_t (*) (sb *));
-extern void macro_init (int, int, int);
+extern void macro_init (int, int);
 extern void macro_end (void);
 extern void macro_set_alternate (int);
 extern void macro_mri_mode (int);