* symbols.c (S_SET_EXTERNAL): Warn if symbol is weak.

(S_CLEAR_EXTERNAL): Likewise.
	(S_SET_WEAK): Warn if symbol is global.
PR 6750.

gas/ChangeLog

@@ -1,5 +1,9 @@
 Wed Jul  5 12:01:49 1995  Ian Lance Taylor  <ian@cygnus.com>
 
+	* symbols.c (S_SET_EXTERNAL): Warn if symbol is weak.
+	(S_CLEAR_EXTERNAL): Likewise.
+	(S_SET_WEAK): Warn if symbol is global.
+
 	* config/obj-aout.c (obj_aout_frob_symbol): Warn about an attempt
 	to put an undefined symbol into a set.
 

gas/symbols.c

@@ -157,13 +157,10 @@ colon (sym_name)		/* just seen "x:" - rattle symbols & frags */
 {
   register symbolS *symbolP;	/* symbol we are working with */
 
-#ifdef LOCAL_LABELS_DOLLAR
   /* Sun local labels go out of scope whenever a non-local symbol is
      defined.  */
-
-  if (*sym_name != 'L')
+  if (LOCAL_LABELS_DOLLAR && *sym_name != 'L')
     dollar_label_clear ();
-#endif /* LOCAL_LABELS_DOLLAR */
 
 #ifndef WORKING_DOT_WORD
   if (new_broken_words)
@@ -765,8 +762,6 @@ resolve_symbol_value (symp)
     }
 }
 
-#ifdef LOCAL_LABELS_DOLLAR
-
 /* Dollar labels look like a number followed by a dollar sign.  Eg, "42$".
    They are *really* local.  That is, they go out of scope whenever we see a
    label that isn't local.  Also, like fb labels, there can be multiple
@@ -918,10 +913,6 @@ dollar_label_name (n, augend)
   return symbol_name_build;
 }
 
-#endif /* LOCAL_LABELS_DOLLAR */
-
-#ifdef LOCAL_LABELS_FB
-
 /*
  * Sombody else's idea of local labels. They are made by "n:" where n
  * is any decimal digit. Refer to them with
@@ -1091,9 +1082,6 @@ fb_label_name (n, augend)
   return (symbol_name_build);
 }				/* fb_label_name() */
 
-#endif /* LOCAL_LABELS_FB */
-
-
 /*
  * decode name that may have been generated by foo_label_name() above.  If
  * the name wasn't generated by foo_label_name(), then return it unaltered.
@@ -1112,37 +1100,26 @@ decode_local_label_name (s)
   const char *message_format = "\"%d\" (instance number %d of a %s label)";
 
   if (s[0] != 'L')
-    return (s);
+    return s;
 
   for (label_number = 0, p = s + 1; isdigit (*p); ++p)
-    {
-      label_number = (10 * label_number) + *p - '0';
-    }
+    label_number = (10 * label_number) + *p - '0';
 
   if (*p == 1)
-    {
-      type = "dollar";
-    }
+    type = "dollar";
   else if (*p == 2)
-    {
-      type = "fb";
-    }
+    type = "fb";
   else
-    {
-      return (s);
-    }
+    return s;
 
-  for (instance_number = 0, p = s + 1; isdigit (*p); ++p)
-    {
-      instance_number = (10 * instance_number) + *p - '0';
-    }
+  for (instance_number = 0, p++; isdigit (*p); ++p)
+    instance_number = (10 * instance_number) + *p - '0';
 
   symbol_decode = obstack_alloc (&notes, strlen (message_format) + 30);
-  (void) sprintf (symbol_decode, message_format, label_number,
-		  instance_number, type);
+  sprintf (symbol_decode, message_format, label_number, instance_number, type);
 
-  return (symbol_decode);
-}				/* decode_local_label_name() */
+  return symbol_decode;
+}
 
 /* Get the value of a symbol.  */
 
@@ -1281,6 +1258,8 @@ void
 S_SET_EXTERNAL (s)
      symbolS *s;
 {
+  if ((s->bsym->flags & BSF_WEAK) != 0)
+    as_warn ("%s already declared as weak", S_GET_NAME (s));
   s->bsym->flags |= BSF_GLOBAL;
   s->bsym->flags &= ~(BSF_LOCAL|BSF_WEAK);
 }
@@ -1289,6 +1268,8 @@ void
 S_CLEAR_EXTERNAL (s)
      symbolS *s;
 {
+  if ((s->bsym->flags & BSF_WEAK) != 0)
+    as_warn ("%s already declared as weak", S_GET_NAME (s));
   s->bsym->flags |= BSF_LOCAL;
   s->bsym->flags &= ~(BSF_GLOBAL|BSF_WEAK);
 }
@@ -1297,6 +1278,8 @@ void
 S_SET_WEAK (s)
      symbolS *s;
 {
+  if ((s->bsym->flags & BSF_GLOBAL) != 0)
+    as_warn ("%s already declared as global", S_GET_NAME (s));
   s->bsym->flags |= BSF_WEAK;
   s->bsym->flags &= ~(BSF_GLOBAL|BSF_LOCAL);
 }
@@ -1328,20 +1311,23 @@ symbol_begin ()
 #endif
   abs_symbol.sy_value.X_op = O_constant;
 
-#ifdef LOCAL_LABELS_FB
-  fb_label_init ();
-#endif /* LOCAL_LABELS_FB */
+  if (LOCAL_LABELS_FB)
+    fb_label_init ();
 }
 
 
 int indent_level;
 
+#if 0
+
 static void
 indent ()
 {
   printf ("%*s", indent_level * 4, "");
 }
 
+#endif
+
 void print_expr_1 PARAMS ((FILE *, expressionS *));
 void print_symbol_value_1 PARAMS ((FILE *, symbolS *));
 
@@ -1353,7 +1339,7 @@ print_symbol_value_1 (file, sym)
   const char *name = S_GET_NAME (sym);
   if (!name || !name[0])
     name = "(unnamed)";
-  fprintf (file, "sym %lx %s", sym, name);
+  fprintf (file, "sym %lx %s", (unsigned long) sym, name);
   if (sym->sy_frag != &zero_address_frag)
     fprintf (file, " frag %lx", (long) sym->sy_frag);
   if (sym->written)