Mark __func__ with line number 0, to avoid confusing debuggers.

From-SVN: r56081

gcc/ChangeLog

+2002-08-06  Dale Johannesen  <dalej@apple.com>
+	* c-common.c (fname_decl): Use line number 0 for
+        __func__, to avoid confusing debuggers.
+
 2002-08-06  Nathan Sidwell  <nathan@codesourcery.com>
 
 	* gcov.c: Tidy.

gcc/c-common.c

@@ -1102,6 +1102,13 @@ fname_decl (rid, id)
   if (!decl)
     {
       tree saved_last_tree = last_tree;
+      /* If a tree is built here, it would normally have the lineno of
+	 the current statement.  Later this tree will be moved to the
+	 beginning of the function and this line number will be wrong.
+	 To avoid this problem set the lineno to 0 here; that prevents
+	 it from appearing in the RTL. */
+      int saved_lineno = lineno;
+      lineno = 0;
       
       decl = (*make_fname_decl) (id, fname_vars[ix].pretty);
       if (last_tree != saved_last_tree)
@@ -1117,6 +1124,7 @@ fname_decl (rid, id)
 						 saved_function_name_decls);
 	}
       *fname_vars[ix].decl = decl;
+      lineno = saved_lineno;
     }
   if (!ix && !current_function_decl)
     pedwarn_with_decl (decl, "`%s' is not defined outside of function scope");