1 files changed, 11 insertions, 0 deletions
diff --git a/lib/openat-priv.h b/lib/openat-priv.h
index 2b4780eec..1f420c175 100644
--- a/lib/openat-priv.h
+++ b/lib/openat-priv.h
@@ -19,6 +19,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <errno.h>
 #include "alloca.h"
 #include "intprops.h"
 
@@ -41,6 +42,16 @@
     }									\
   while (0)
 
+/* Some systems don't have ENOSYS.  */
+#ifndef ENOSYS
+# ifdef ENOTSUP
+#  define ENOSYS ENOTSUP
+# else
+/* Some systems don't have ENOTSUP either.  */
+#  define ENOSYS EINVAL
+# endif
+#endif
+
 /* Trying to access a BUILD_PROC_NAME file will fail on systems without
    /proc support, and even on systems *with* ProcFS support.  Return
    nonzero if the failure may be legitimate, e.g., because /proc is not