[PATCH v3] util: systemd: Define MSG_NOSIGNAL if needed

[Andrea Bolognani <abologna@xxxxxxxxxx>]

The symbol being missing has been reported as causing build
failures on OS X. If it's not already defined, define it to
zero so that it won't have any effect.
---
Changes from v2:

  * define MSG_NOSIGNAL to zero if not already defined
    instead of conditionally compiling the code depending
    on it

 src/util/virsystemd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/util/virsystemd.c b/src/util/virsystemd.c
index 969cd68..7d6985b 100644
--- a/src/util/virsystemd.c
+++ b/src/util/virsystemd.c
@@ -41,6 +41,10 @@
 
 VIR_LOG_INIT("util.systemd");
 
+#ifndef MSG_NOSIGNAL
+# define MSG_NOSIGNAL 0
+#endif
+
 static void virSystemdEscapeName(virBufferPtr buf,
                                  const char *name)
 {
-- 
2.7.4

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