diff -u -r ../attr-2.4.48/tools/attr.c ./tools/attr.c
--- ../attr-2.4.48/tools/attr.c	2018-01-21 05:00:44.000000000 +0000
+++ ./tools/attr.c	2018-06-26 03:18:34.271455876 +0000
@@ -28,6 +28,7 @@
 #include <errno.h>
 #include <string.h>
 #include <locale.h>
+#include <libgen.h> /* for basename(3) */
 
 #include <attr/attributes.h>