+HAVE_LIBSYSTEMD=no
+if test "${with_libsystemd}" = "yes" ; then
+ dnl This code has been tested with libsystemd 222 and later.
+ dnl FIXME: Find the earliest version number for which Emacs should work,
+ dnl and change '222' to that number.
+ EMACS_CHECK_MODULES([LIBSYSTEMD], [libsystemd >= 222],
+ [HAVE_LIBSYSTEMD=yes], [HAVE_LIBSYSTEMD=no])
+ if test "${HAVE_LIBSYSTEMD}" = "yes"; then
+ AC_DEFINE(HAVE_LIBSYSTEMD, 1, [Define if using libsystemd.])
+ fi
+fi
+
+AC_SUBST(LIBSYSTEMD_LIBS)
+AC_SUBST(LIBSYSTEMD_CFLAGS)
+