Some buildroots provide version of kernel-headers package that do not yet

contains O_TMPFILE definition.  Since (looks like) there were none discrepancies

in O_TMPFILE definition in RHEL, work that around by providing a fallback

definition of O_TMPFILE.

Index: strace-5.2/src/open.c

===================================================================

--- strace-5.2.orig/src/open.c	2019-07-11 19:51:22.000000000 +0200

+++ strace-5.2/src/open.c	2019-07-22 17:49:41.508766666 +0200

@@ -32,6 +32,10 @@

 #include <linux/openat2.h>

 #include <linux/fcntl.h>

+#ifndef O_TMPFILE

+# define O_TMPFILE (__O_TMPFILE | O_DIRECTORY)

+#endif

+

 #include "xlat/open_access_modes.h"

 #include "xlat/open_mode_flags.h"

 #include "xlat/open_resolve_flags.h"