Nut upsdev - Apr 2017 - [PATCH] Detect correct systemdsystemshutdowndir

nut hardcodes systemdsystemshutdowndir to
${libdir}/systemd/system-shutdown. This is not valid:
- Executable helpers are installed to ${libexecdir}, which is different
  from ${libdir} on bi-arch systems.
- Even if nut will use ${libexecdir}, it could be different from
  systemd libexecdir.

That is why it is better to check systemd.pc for the correct path.
That path is stored as systemdutildir. In older systemd versions,
systemdutildir does not exist yet, and we need to use
systemdsystemunitdir can be used.

Signed-off-by: Stanislav Brabec <sbrabec at suse.cz>
---
 configure.ac | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 6f8a40c4..f9a298d9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1197,7 +1197,12 @@ dnl Override installation directory, with the local
installation
 dnl prefix. This is needed for 'distcheck*' targets, otherwise
 dnl files will try to get intalled to the actual system directories
 if test -n "${systemdsystemunitdir}"; then
-	systemdsystemshutdowndir="${libdir}/systemd/system-shutdown"
+	systemdutildir=`$PKG_CONFIG --variable=systemdutildir systemd`
+	if test -n "${systemdutildir}"; then
+		systemdsystemshutdowndir="${systemdutildir}/system-shutdown"
+	else
+		systemdsystemshutdowndir="${systemdsystemunitdir}/system-shutdown"
+	fi
 	AC_MSG_RESULT(using ${systemdsystemunitdir})
 else
 	AC_MSG_RESULT(no)
-- 
2.12.2

-- 
Best Regards / S pozdravem,

Stanislav Brabec
software developer
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