bootchart: add standalone bootchart service

Makefile.am

@@ -4511,6 +4511,15 @@ rootlibexec_PROGRAMS += \
 
 dist_pkgsysconf_DATA += \
 	src/bootchart/bootchart.conf
+
+nodist_systemunit_DATA += \
+	units/systemd-bootchart.service
+
+EXTRA_DIST += \
+	units/systemd-bootchart.service.in
+
+CLEANFILES += \
+	units/systemd-bootchart.service
 endif
 
 # ------------------------------------------------------------------------------

units/systemd-bootchart.service.in

@@ -0,0 +1,20 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+# Note: it's usually a better idea to run systemd-bootchart via the
+# init= kernel command line switch. See the man page for details.
+
+[Unit]
+Description=Boot Process Profiler
+Documentation=man:systemd-bootchart.service(1) man:bootchart.conf(5)
+DefaultDependencies=no
+
+[Service]
+ExecStart=@rootlibexecdir@/systemd-bootchart -r
+
+[Install]
+WantedBy=sysinit.target