diff -rup a/open.c b/open.c

--- a/open.c	2017-05-22 13:33:51.000000000 -0400

+++ b/open.c	2017-06-16 21:39:19.443745779 -0400

@@ -41,6 +41,10 @@

 #undef O_ACCMODE

 #define O_ACCMODE 03

+#ifndef O_TMPFILE

+#define O_TMPFILE 020000000

+#endif

+

 #ifdef O_LARGEFILE

 # if O_LARGEFILE == 0          /* biarch platforms in 64-bit mode */

 #  undef O_LARGEFILE