configure.ac + debian: Add systemd service file support

Closes: OS#4326
Change-Id: I0d7b6562c1127f005ddbd47298c03942ac3d241d

configure.ac

@@ -160,6 +160,22 @@ then
 	AC_SUBST([OSMO_GSM_MANUALS_DIR])
 fi
 
+# https://www.freedesktop.org/software/systemd/man/daemon.html
+AC_ARG_WITH([systemdsystemunitdir],
+     [AS_HELP_STRING([--with-systemdsystemunitdir=DIR], [Directory for systemd service files])],,
+     [with_systemdsystemunitdir=auto])
+AS_IF([test "x$with_systemdsystemunitdir" = "xyes" -o "x$with_systemdsystemunitdir" = "xauto"], [
+     def_systemdsystemunitdir=$($PKG_CONFIG --variable=systemdsystemunitdir systemd)
+
+     AS_IF([test "x$def_systemdsystemunitdir" = "x"],
+   [AS_IF([test "x$with_systemdsystemunitdir" = "xyes"],
+    [AC_MSG_ERROR([systemd support requested but pkg-config unable to query systemd package])])
+    with_systemdsystemunitdir=no],
+   [with_systemdsystemunitdir="$def_systemdsystemunitdir"])])
+AS_IF([test "x$with_systemdsystemunitdir" != "xno"],
+      [AC_SUBST([systemdsystemunitdir], [$with_systemdsystemunitdir])])
+AM_CONDITIONAL([HAVE_SYSTEMD], [test "x$with_systemdsystemunitdir" != "xno"])
+
 CFLAGS="$CFLAGS -Wall"
 CPPFLAGS="$CPPFLAGS -Wall"
 

contrib/systemd/Makefile.am

@@ -1 +1,8 @@
 EXTRA_DIST = osmo-remsim-bankd.service osmo-remsim-client@.service osmo-remsim-server.service
+
+if HAVE_SYSTEMD
+systemdsystemunit_DATA = \
+	osmo-remsim-bankd.service \
+	osmo-remsim-server.service \
+	osmo-remsim-client@.service
+endif

debian/osmo-remsim-bankd.install

@@ -1 +1,2 @@
 usr/bin/osmo-remsim-bankd
+lib/systemd/system/osmo-remsim-bankd.service

debian/osmo-remsim-client.install

@@ -1 +1,2 @@
 usr/bin/osmo-remsim-client*
+lib/systemd/system/osmo-remsim-client*

debian/osmo-remsim-server.install

@@ -1 +1,2 @@
 usr/bin/osmo-remsim-server
+lib/systemd/system/osmo-remsim-server.service