examples/vhost_blk: fix build with pkg-config

vhost_blk.c: In function ‘ctrlr_worker’:
vhost_blk.c:543:2: warning: implicit declaration of function ‘CPU_ZERO’
[-Wimplicit-function-declaration]
  543 |  CPU_ZERO(&cpuset);
      |  ^~~~~~~~
vhost_blk.c:544:2: warning: implicit declaration of function ‘CPU_SET’
[-Wimplicit-function-declaration]
  544 |  CPU_SET(0, &cpuset);
      |  ^~~~~~~
vhost_blk.c:545:2: warning: implicit declaration of function
‘pthread_setaffinity_np’ [-Wimplicit-function-declaration]
  545 |  pthread_setaffinity_np(thread, sizeof(cpu_set_t), &cpuset);
      |  ^~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cczpiMWH.o: in function `ctrlr_worker':
vhost_blk.c:(.text+0x1076): undefined reference to `CPU_ZERO'
/usr/bin/ld: vhost_blk.c:(.text+0x1082): undefined reference to
`CPU_SET'
collect2: error: ld returned 1 exit status
gmake: *** [Makefile:34: build/vhost-blk-shared] Error 1

Explicitly pass _GNU_SOURCE and include missing headers (rather than
rely on automagic inclusion from other system headers).

Fixes: c19beb3f38cd ("examples/vhost_blk: introduce vhost storage sample")
Cc: stable@dpdk.org
Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

diff --git a/examples/vhost_blk/vhost_blk.c b/examples/vhost_blk/vhost_blk.c
index 8f5d61a..bb293d4 100644 (file)
--- a/examples/vhost_blk/vhost_blk.c
+++ b/examples/vhost_blk/vhost_blk.c
@@ -2,6 +2,12 @@
  * Copyright(c) 2010-2019 Intel Corporation
  */
 
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <pthread.h>
+#include <sched.h>
+
 #include <stdint.h>
 #include <unistd.h>
 #include <stdbool.h>