(check_newline): #line updates input_file_stack->name.

From-SVN: r3556

gcc/c-lex.c

@@ -659,7 +659,13 @@ linenum:
       while (c == ' ' || c == '\t')
 	c = getc (finput);
       if (c == '\n')
+	{
+	  /* Update the name in the top element of input_file_stack.  */
+	  if (input_file_stack)
+	    input_file_stack->name = input_filename;
+
 	  return c;
+	}
       ungetc (c, finput);
 
       token = yylex ();
@@ -711,6 +717,11 @@ linenum:
 	    }
 	}
 
+      /* Now that we've pushed or popped the input stack,
+	 update the name in the top element.  */
+      if (input_file_stack)
+	input_file_stack->name = input_filename;
+
       /* If we have handled a `1' or a `2',
 	 see if there is another number to read.  */
       if (used_up)