[PATCH 8/9] kdbus/samples: skip if __NR_memfd_create is not defined

[David Herrmann <dh.herrmann@gmail.com>]

We require __NR_memfd_create for the kdbus samples. Make sure we skip
compilation if the target architecture and kernel do not support memfds.

Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Reviewed-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
---
 samples/kdbus/kdbus-workers.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/samples/kdbus/kdbus-workers.c b/samples/kdbus/kdbus-workers.c
index c3ba958..5a6dfdc 100644
--- a/samples/kdbus/kdbus-workers.c
+++ b/samples/kdbus/kdbus-workers.c
@@ -59,9 +59,11 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/syscall.h>
 
 /* glibc < 2.7 does not ship sys/signalfd.h */
-#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 7
+/* we require kernels with __NR_memfd_create */
+#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 7 && defined(__NR_memfd_create)
 
 #include <ctype.h>
 #include <errno.h>
@@ -75,7 +77,6 @@
 #include <sys/mman.h>
 #include <sys/poll.h>
 #include <sys/signalfd.h>
-#include <sys/syscall.h>
 #include <sys/time.h>
 #include <sys/wait.h>
 #include <time.h>
-- 
2.5.0