1 files changed, 36 insertions, 0 deletions
diff --git a/m4/want_systemd.m4 b/m4/want_systemd.m4
new file mode 100644
index 0000000..fbccbc2
--- /dev/null
+++ b/m4/want_systemd.m4
@@ -0,0 +1,36 @@
+dnl Checks for libsystemd existence and where
+dnl to put systemd unit files. You can have
+dnl systemd units without libsystemd.
+
+AC_DEFUN([DOVECOT_WANT_SYSTEMD], [
+  systemdservicetype='simple'
+  have_libsystemd=no
+
+  AS_IF([test "$want_systemd" != "no"], [
+    dnl Check for actual systemd integration
+    PKG_CHECK_MODULES([SYSTEMD], [libsystemd], [
+      AC_DEFINE([HAVE_LIBSYSTEMD],[1], [Define to 1 if you have libsystemd])
+      systemdservicetype='notify'
+      have_libsystemd=yes
+    ], AS_IF([test "$want_systemd" = "yes"], [
+         AC_MSG_WARN([libsystemd not found - full integration disabled])
+       ])
+    )
+    dnl Check for unit file installation
+    AC_MSG_CHECKING([for systemd unit directory])
+    AS_IF([test "$systemdsystemunitdir" = ""], [
+       PKG_CHECK_VAR([systemdsystemunitdir], [systemd], [systemdsystemunitdir])
+    ])
+    AC_MSG_RESULT([$systemdsystemunitdir])
+    AS_IF([test "$systemdsystemunitdir" = ""], [
+      AS_IF([test "$want_systemd" = "yes"], [
+        AC_MSG_ERROR([Cannot determine where to put systemd files - Provide systemdsystemunitdir manually])
+      ])
+      dnl Cannot enable even unit file installation.
+      want_systemd=no
+    ])
+  ])
+  AC_SUBST(systemdsystemunitdir)
+  AC_SUBST(systemdservicetype)
+  AM_CONDITIONAL(WANT_SYSTEMD, [test "$want_systemd" != "no"])
+])