[libvirt] Minor compile failure on OSX for libvirt 2.0.0

Hi all, There's a minor compile failure on OSX with libvirt 2.0.0: CC util/libvirt_util_la-virtime.lo CC util/libvirt_util_la-virtpm.lo util/virsystemd.c:524:26: error: use of undeclared identifier 'MSG_NOSIGNAL' if (sendmsg(fd, &mh, MSG_NOSIGNAL) < 0) ^ 1 error generated. make[3]: *** [util/libvirt_util_la-virsystemd.lo] Error 1 make[3]: *** Waiting for unfinished jobs.... Seems solvable by adding a stub declaration for MSG_NOSIGNAL on systems that don't implement it. An initial patch with the declaration, developed by Tomasz Pajor (CC'd), is below: --- src/util/virsystemd.h.orig 2016-07-03 21:40:12.000000000 +0200 +++ src/util/virsystemd.h 2016-07-03 21:37:53.000000000 +0200 @@ -57,3 +57,7 @@ char *virSystemdGetMachineNameByPID(pid_t pid); #endif /* __VIR_SYSTEMD_H__ */ + +#ifndef MSG_NOSIGNAL +#define MSG_NOSIGNAL 0x0 //Don't request NOSIGNAL on systems where this is not implemented. +#endif It's outside the #endif for __VIR_SYSTEMD_H___ though, so I'm kind of thinking it would need to be move inside the guard (which also compiles ok), or is there a better place/file for it instead? :) Regards and best wishes, Justin Clift -- "My grandfather once told me that there are two kinds of people: those who work and those who take the credit. He told me to try to be in the first group; there was less competition there." - Indira Gandhi