diff --git a/ap/build/uClibc/libc/stdio/setlinebuf.c b/ap/build/uClibc/libc/stdio/setlinebuf.c
new file mode 100644
index 0000000..9323388
--- /dev/null
+++ b/ap/build/uClibc/libc/stdio/setlinebuf.c
@@ -0,0 +1,24 @@
+/* Copyright (C) 2004       Manuel Novoa III    <mjn3@codepoet.org>
+ *
+ * GNU Library General Public License (LGPL) version 2 or later.
+ *
+ * Dedicated to Toni.  See uClibc/DEDICATION.mjn3 for details.
+ */
+
+#include "_stdio.h"
+
+#ifdef __USE_BSD
+
+
+/* A BSD function.  The implementation matches the linux man page,
+ * except that we do not bother calling setvbuf if not configured
+ * for stream buffering.
+ */
+
+void setlinebuf(FILE * __restrict stream)
+{
+#ifdef __STDIO_BUFFERS
+	setvbuf(stream, NULL, _IOLBF, (size_t) 0);
+#endif
+}
+#endif