[libvirt] [PATCH v2] configure: Check for MSG_NOSIGNAL availability
Daniel P. Berrange
berrange at redhat.com
Wed Jul 20 13:19:28 UTC 2016
On Wed, Jul 20, 2016 at 03:16:35PM +0200, Andrea Bolognani wrote:
> The symbol being missing has been reported as causing build
> failures on OS X. Check for its availability before using it.
> ---
> Changes from v1:
>
> * don't unnecessarily check for availability at configure
> time (thanks Ján)
>
> src/util/virsystemd.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/src/util/virsystemd.c b/src/util/virsystemd.c
> index 969cd68..81ee538 100644
> --- a/src/util/virsystemd.c
> +++ b/src/util/virsystemd.c
> @@ -482,7 +482,7 @@ int virSystemdTerminateMachine(const char *name)
> void
> virSystemdNotifyStartup(void)
> {
> -#ifdef HAVE_SYS_UN_H
> +#if defined(HAVE_SYS_UN_H) && defined(MSG_NOSIGNAL)
> const char *path;
> const char *msg = "READY=1";
> int fd;
> @@ -526,7 +526,7 @@ virSystemdNotifyStartup(void)
> VIR_WARN("Failed to notify systemd");
>
> VIR_FORCE_CLOSE(fd);
> -#endif /* HAVE_SYS_UN_H */
> +#endif /* defined(HAVE_SYS_UN_H) && defined(MSG_NOSIGNAL) */
IMHO it'd be nicer to just do
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif
as it avoids creating ever more compicated conditional blocks around the
code.
Regards,
Daniel
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