--- gcc/config/next.c	2018/04/24 17:51:31	1.1.1.1
+++ gcc/config/next.c	2018/04/24 17:58:32	1.1.1.2
@@ -19,6 +19,8 @@ static int pragma_initialized;
 
 static int initial_optimize_flag;
 
+extern char *get_directive_line ();
+
 /* Called from check_newline via the macro HANDLE_PRAGMA.
    FINPUT is the source file input stream.  */